International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.3 http://ecoevopublisher.com/index.php/ijmec © 2024 EcoEvoPublisher, registered at the publishing platform that is operated by Sophia Publishing Group, founded in British Columbia of Canada. All Rights Reserved. -
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.3 http://ecoevopublisher.com/index.php/ijmec © 2024 EcoEvoPublisher, registered at the publishing platform that is operated by Sophia Publishing Group, founded in British Columbia of Canada. All Rights Reserved. EcoEvoPublisher is an international Open Access publisher specializing in molecular ecology and conservation research registered at the publishing platform that is operated by Sophia Publishing Group (SPG), founded in British Columbia of Canada. Publisher EcoEvo Publisher Edited by Editorial Team of International Journal of Molecular Ecology and Conservation Email: edit@ijmec.ecoevopublisher.com Website: http://ecoevopublisher.com/index.php/ijmec Address: 11388 Stevenston Hwy, PO Box 96016, Richmond, V7A 5J5, British Columbia Canada International Journal of Molecular Ecology and Conservation (ISSN 1927-663X) is an open access, peer reviewed journal published online by EcoEvoPublisher. The journal is considering all the latest and outstanding research articles, letters and reviews in all aspects of molecular ecology and conservation, containing the contents of the ranges from the applied to the theoretical in molecular ecology and nature conservation, the policy and management with comprehensive and applicable information; the ecological bases for the conservation of ecosystems, species, genetic diversity, the restoration of ecosystems and habitats; as well as the expands the field of ecology and conservation work. All the articles published in International Journal of Molecular Ecology and Conservation are Open Access, and are distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. EcoEvoPublisher uses CrossCheck service to identify academic plagiarism through the world’s leading plagiarism prevention tool, iParadigms, and to protect the original authors’ copyrights.
International Journal of Molecular Ecology and Conservation (online), 2024, Vol. 14, No.3 ISSN 1927-663X https://ecoevopublisher.com/index.php/ijmec © 2024 EcoEvoPublisher, registered at the publishing platform that is operated by Sophia Publishing Group, founded in British Columbia of Canada. All Rights Reserved. Latest Content Embracing Biodiversity and Championing Mangrove Conservation International Journal of Molecular Ecology and Conservation, 2024, Vol. 14, No. 3, 105 Increasing Fire Activity in African Tropical Forests: The Dual Impact of Climate Change and Deforestation Josselynn XZ Feng International Journal of Molecular Ecology and Conservation, 2024, Vol. 14, No. 3, 106-108 Impact of Climate Change on Primate Populations and Habitats Jing He, Jun Li International Journal of Molecular Ecology and Conservation, 2024, Vol. 14, No. 3, 109-121 Aphid-Plant Interactions: Evolutionary and Ecological Perspectives Xiaoqing Tang International Journal of Molecular Ecology and Conservation, 2024, Vol. 14, No. 3, 122-133 Impact of Habitat Fragmentation on Reptile Populations and Conservation Strategies Hongbo Liang, Jia Xuan International Journal of Molecular Ecology and Conservation, 2024, Vol. 14, No. 3, 134-143
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.3, 105 http://ecoevopublisher.com/index.php/ijmec 105 Embracing Biodiversity and Championing Mangrove Conservation Received: 19 May, 2024 Accepted: 23 May, 2024 Published: 26 May., 2024 Copyright ©2024 This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: 2024, Embracing biodiversity and championing mangrove conservation, International Journal of Molecular Ecology and Conservation, 14(3): 105 (doi: 10.5376/ijmec.2024.14.0011) Each year, May 22nd serves as a beacon of awareness through the International Day for Biological Diversity, reminding us of the indispensable role of biodiversity in sustaining human welfare and development. On this occasion, we specially cast a spotlight on the mangrove ecosystem, advocating for global cooperation to safeguard this vital natural asset. Mangrove ecosystem, one of the most productive ecosystems on Earth, offer multiple ecological, climatic, and community benefits. As highly efficient carbon sinks, mangroves can store 3.754 × 106 kg of carbon per hectare. However, their destruction, degradation, or loss can lead to the release of carbon dioxide, exacerbating climate change. It is estimated that 8.183 × 105 hm2 of mangroves worldwide have the potential for restoration, which could store an additional 1.27 × 10 12 kg of carbon dioxide in the future. Moreover, as natural coastal barriers, mangroves help protect against storm surges, tsunamis, sea-level rise and erosion, reducing storm damage and mitigating flood risks. The importance of mangroves is undeniable, yet even before we fully recognized their value, they had already experienced significant reductions in area and functional degradation. In recent years, these unique and productive mangrove ecosystems have started to receive increasing attention. The “30x30” global conservation target under the Convention on Biological Diversity (CBD) explicitly includes mangrove ecosystems, reflecting their critical role in biodiversity and climate resilience. Numerous exemplary practices are underway globally, aiming to address environmental and developmental issues through the conservation, restoration, and sustainable management of mangroves. With global efforts, some progress has been made in the conservation of mangrove ecosystems. However, sustained global cooperation, along with the collective attention and effort of all sectors of society, remain crucial. The threats to mangroves still persist, and factors such as human activities and global climate change continue to pose severe challenges to mangrove ecosystems. Therefore, innovation in conservation models is crucial, requiring the exploration of an organic unity of ecological, economic, and social benefits to ensure the sustainability of conservation and restoration projects. In the spirit of collaboration and stewardship, we urge our readers, researchers, and policymakers to continue supporting and advancing mangrove conservation. Through collaboration and proactive measures, we can protect and restore mangroves on a larger scale. Let us continue to work collectively towards a sustainable and biodiverse future. As we celebrate International Day for Biological Diversity, we reaffirm our commitment to the conservation of biodiversity. Biodiversity is at the core of the Earth’s life support system, and its conservation is crucial for maintaining ecological balance and ensuring sustainable development for humanity. The Molecular Ecology and Conservation will remain steadfast in its mission to highlight and support innovative research, through collaboration and knowledge sharing, inspiring collective action.
International Journal of Molecular Ecology and Conservation, 2024, Vol.14, No.3, 106-108 http://ecoevopublisher.com/index.php/ijmec 106 Scientific Commentary Open Access Increasing Fire Activity in African Tropical Forests: The Dual Impact of Climate Change and Deforestation Josselynn XZ Feng Hainan Institute of Tropical Agricultural Resources, Sanya, 572024, Hainan, China Corresponding author: josselynn.editor@gmail.com International Journal of Molecular Ecology and Conservation, 2024, Vol.14, No.3 doi: 10.5376/ijmec.2024.14.0012 Received: 19 Apr., 2024 Accepted: 21 May, 2024 Published: 27 May, 2024 Copyright © 2025 Feng, This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: Feng X.Z., 2024, Increasing fire activity in african tropical forests: the dual impact of climate change and deforestation, International Journal of Molecular Ecology and Conservation, 14(3): 94-96 (doi: 10.5376/ijmec.2024.14.0012) Abstract The paper "Increasing Fire Activity in African Tropical Forests Is Associated With Deforestation and Climate Change" was published in the journal Geophysical Research Letters on May 02, 2024, by authors M. C. Wimberlyx et al., from the Department of Geography and EnvironmentalSustainability, University of Oklahoma, Norman, USA, among other institutions. This study comprehensively analyzed the increase in fire activity in African tropical forests from 2003 to 2021, particularly in the Congo Basin. It demonstrates a close association between these trends and deforestation as well as climate change. Utilizing Moderate Resolution Imaging Spectroradiometer (MODIS) active fire data, the research assessed the spatiotemporal distribution and trends of fires in African tropical forests and analyzed their relationship with deforestation and climate change dynamics. 1 Interpretation of Experimental Data Figure 1 illustrates the tropical and subtropical moist broadleaf forests of West and Central Africa, covering ten ecoregions as defined by the 2000 Global Forest Change dataset. These areas, including the Central Congolian Lowland Forests and Eastern Congolian Swamp Forests, highlight regions where forest cover exceeds 50%. These ecoregions are crucial for studying fire activity and understanding trends in forest cover and fire dynamics inAfrica. Figure 1 The study area Figure 2 illustrates fire activity in West and Central Africa from 2003 to 2021. Panel (a) shows the mean annual fire density, with higher concentrations at the edges of forest regions. Panel (b) reveals fire trends, indicating an increasing pattern in the Congo Basin. Panels (c) and (d) display fire anomalies for 2015 and 2016, respectively, with significant activities concentrated in the Congo Basin and nearby areas, suggesting that these regions have experienced an elevated fire risk associated with climatic anomalies. 2 Insight of Research Findings The study indicates significant increases in fire activity in specific areas, particularly where deforestation rates are high. Additionally, the increase in climatic variables, especially temperature and vapor pressure deficit, strongly correlates with the rise in fire activity. Notably, the 2015-2016 strong El Niño event coincided with unusually high fire activity across the region.
International Journal of Molecular Ecology and Conservation, 2024, Vol.14, No.3, 106-108 http://ecoevopublisher.com/index.php/ijmec 107 Figure 2 The mean annual fire density and trends in fire activity per area from 2003 to 2021 3 Evaluation of the Research This research provides valuable data and insights for understanding changes in fire activity in African tropical forests. It not only reveals the link between fires, deforestation, and climate change but also emphasizes the need for further attention to fire activities in these areas to fully understand their global impacts on carbon dynamics and local implications for biodiversity and human livelihoods. 4 Concluding Remarks The study underscores the increasing fire activity in African tropical forests and its relationship with deforestation and climate change. These findings are crucial for developing effective forest management and fire prevention strategies, especially in light of expected future climate conditions of increased warmth and aridity.
International Journal of Molecular Ecology and Conservation, 2024, Vol.14, No.3, 106-108 http://ecoevopublisher.com/index.php/ijmec 108 5 Access the Full Text M. C. Wimberlyx, D. Wanyama, R. Doughty, et al. Increasing Fire Activity in African Tropical Forests Is Associated With Deforestation and Climate Change. Geophysical Research Letters (2024). https://doi.org/10.1029/2023GL106240. 6 Acknowledgement The authors express their sincere gratitude to Geophysical Research Letters magazine for its open access policy, which allows free access, reading, commentary, and sharing of the outstanding paper "M. C. Wimberlyx, D. Wanyama, R. Doughty, et al. Increasing Fire Activity in African Tropical Forests Is Associated With Deforestation and Climate Change." This initiative not only broadens the channels for disseminating scientific knowledge but also provides a valuable academic resource for researchers, students, and science enthusiasts worldwide. Geophysical Research Letters magazine, through its philosophy of openness and sharing, has significantly advanced the development of science and deepened the public's understanding and interest in scientific research, for which we express our appreciation and gratitude. 7 Disclaimer/Publisher's Statement The statements, opinions, and data contained in all publications represent only the views of the individual authors and contributors, and do not represent the views of the publisher and/or its editors. The publisher and/or its editors are not liable for any harm or damage to persons or property that may result from the application of the views, methods, guidance, or products discussed in the content. The publisher remains neutral regarding jurisdictional claims and institutional affiliations in published maps.
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 109 Research Insight Open Access Impact of Climate Change on Primate Populations and Habitats Jing He, Jun Li Animal Science Research Center, Cuixi Academy of Biotechnology, Zhuji, 311800, Zhejiang, China Corresponding author: jun.li@cuixi.org International Journal of Molecular Ecology and Conservation, 2024, Vol.14, No.3 doi: 10.5376/ijmec.2024.14.0013 Received: 22 Apr., 2024 Accepted: 28 May, 2024 Published: 08 Jun., 2024 Copyright © 2024 He and Li, This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: He J., and Li J., 2024, Impact of Climate Change on Primate Populations and Habitats, International Journal of Molecular Ecology and Conservation, 14(3): 109-121 (doi: 10.5376/ijmec.2024.14.0013) Abstract This review explores the multifaceted impacts of climate change on primate populations and their habitats, emphasizing the complexity and wide-reaching nature of these effects. Climate change poses a significant threat to the survival of primates globally by altering temperature and precipitation patterns, causing habitat loss and fragmentation, and exacerbating competition for resources. Research indicates that many primate habitats may shrink drastically in the coming decades, leading to population isolation and a decline in genetic diversity. Although some conservation strategies have shown success, these approaches need adaptive adjustments to address the ongoing and future impacts of climate change. The review also highlights the importance of enhancing research and interdisciplinary collaboration, calling for the integration of biology, climatology, and social sciences to develop more comprehensive and flexible conservation measures that can address the complex challenges posed by climate change on primates. Keywords Climate change; Primates; Habitat loss; Population dynamics; Genetic diversity 1 Introduction Climate change is a significant global challenge, driven primarily by human activities that increase greenhouse gas concentrations in the atmosphere. These activities have led to rising temperatures, altered precipitation patterns, and increased frequency of extreme weather events. The impacts of climate change are evident across various ecosystems, influencing biodiversity, ecosystem services, and human livelihoods. As the global climate continues to change, many species face the risk of extinction due to shifting habitats and disrupted ecological interactions. For instance, climate change is expected to cause substantial losses in primate habitats globally, which can have cascading effects on the biodiversity of tropical regions (Stewart et al., 2020). Primates are vital components of tropical ecosystems, serving as seed dispersers, pollinators, and key indicators of forest health. However, many primate species are particularly vulnerable to climate change due to their specialized habitat requirements and limited ability to migrate. The study of primates in the context of climate change is crucial not only for understanding the direct impacts on these species but also for assessing broader ecological consequences. For example, climate change, coupled with human activities, has significantly increased the extinction risk for many primate species, particularly in biodiverse regions like China and the Amazon (Sales et al., 2020; Li et al., 2023). This review aims to synthesize current knowledge on the impacts of climate change on primate populations and their habitats. To provide an overview of the current and projected effects of climate change on primate distribution and survival, to identify key factors that exacerbate primate vulnerability to climate change, and to discuss potential conservation strategies that could mitigate these impacts. By focusing on research published after 2015, this review highlights the most recent findings and conservation recommendations for primates in a rapidly changing climate. 2 Overview of Primate Diversity and Distribution 2.1 Description of primate families, genera, and species Primates are one of the most diverse orders of mammals, comprising over 500 species across 80 genera. This diversity is reflected in both morphological and behavioral adaptations, which have allowed primates to inhabit a
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 110 wide range of environments. The order Primates is divided into two suborders: Strepsirrhini, which includes lemurs, lorises, and galagos, and Haplorhini, which includes tarsiers, monkeys, and apes. Within Haplorhini, there are two major infraorders: Platyrrhini (New World monkeys) and Catarrhini (Old World monkeys and apes) (Bernard and Marshall, 2020). The Platyrrhines are distinguished by their wide nasal septum and are native to Central and South America, where they occupy tropical forests. In contrast, the Catarrhines, with a narrow nasal septum, are found in Africa and Asia, where they inhabit a variety of environments, from tropical rainforests to savannas and montane forests. The recent expansion of genomic studies has revealed significant genetic diversity within primate species, leading to the identification of new species and the reclassification of existing ones (Kuderna et al., 2023). Understanding the genetic and ecological diversity of primates is crucial for their conservation, particularly in the face of increasing habitat loss. 2.2 Geographical distribution of primate populations Primates are distributed across tropical and subtropical regions of the world, with the highest species diversity found in the rainforests of Central and South America, Africa, and Southeast Asia. The geographical distribution of primates is heavily influenced by historical biogeographic events, such as the formation of rivers, mountain ranges, and climatic changes, which have acted as barriers to gene flow and led to the speciation of isolated populations (Carvalho et al., 2020; Garber, 2021). For instance, the Amazon River and its tributaries have been significant barriers to the distribution of several primate species, resulting in distinct populations on either side of the river (Boubli et al., 2015). In Africa, primate species richness is concentrated in the equatorial regions, where the availability of continuous forest habitats supports diverse communities. However, habitat fragmentation and deforestation are causing shifts in primate distributions, with some species expanding into new areas while others face increased isolation and population declines (Luo et al., 2015; Setchell et al., 2016). 2.3 Overview of habitat types utilized by primates Primates are primarily found in tropical and subtropical regions, where they occupy a variety of habitat types, including tropical rainforests, montane forests, savannas, and woodlands. The majority of primates are arboreal, relying on forest canopies for food and shelter. Tropical rainforests, such as those in the Amazon Basin and the Congo Basin, are particularly important for primate biodiversity, providing the complex, multi-layered habitats that support a high density of species (Stewart et al., 2020). However, some primate species have adapted to more open or seasonal environments, such as the dry forests and savannas of Africa and Madagascar. These habitats require different ecological strategies, with some species displaying significant behavioral and dietary flexibility to cope with the variability in resources. For example, the long-tailed macaque (Macaca fascicularis) in Peninsular Malaysia demonstrates remarkable adaptability, utilizing a wide range of disturbed habitats, including fragmented forests, forest edges, and human-modified landscapes (Osman et al., 2022). This adaptability highlights the resilience of some primate species, although many remain vulnerable to habitat loss and fragmentation. 3 Climate Change and Habitat Alteration 3.1 How climate change is altering primate habitats Climate change is profoundly altering primate habitats through shifts in temperature, precipitation, and seasonal patterns. These changes directly influence the availability and distribution of vegetation types that primates rely on for food and shelter. For instance, the Sichuan snub-nosed monkey (Rhinopithecus roxellana) in China faces significant habitat reduction due to rising temperatures and altered rainfall patterns, forcing the species to migrate to higher elevations to survive (Luo et al., 2015). This habitat shift not only constrains the monkeys' range but also leads to increased competition for dwindling resources. Similarly, in the Brazilian Atlantic Forest, climate change is predicted to cause shifts in the distribution of key tree species essential for the survival of golden lion tamarins (Leontopithecus rosalia), potentially leading to a
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 111 mismatch between the species and their preferred habitats (Raghunathan et al., 2015). As the frequency and intensity of extreme weather events increase, primates face further stress from habitat degradation, impacting their ability to forage, reproduce, and maintain social structures. 3.2 Deforestation, habitat fragmentation, and their relationship with climate change Deforestation and habitat fragmentation are closely intertwined with climate change, exacerbating its impacts on primate populations. The clearing of forests for agriculture, logging, and infrastructure development not only reduces the total area of suitable habitats but also fragments landscapes, isolating primate populations. This isolation restricts gene flow and makes it difficult for primates to migrate in response to environmental changes. For example, studies on the Bale monkey (Chlorocebus djamdjamensis) in Ethiopia show that habitat fragmentation has led to significant changes in vegetation composition and structure, forcing these monkeys to adjust their behaviors to cope with the reduced availability of their primary food sources (Mekonnen et al., 2017). Additionally, deforestation in the Amazon has resulted in fragmented landscapes that are more vulnerable to fires, further threatening primate habitats and compounding the effects of climate change. The interaction between habitat fragmentation and climate change creates a scenario where primates are increasingly unable to adapt or relocate, leading to heightened risks of extinction. 3.3 Shifts in vegetation patterns and their impact on primate habitats Climate change is driving significant shifts in vegetation patterns, which in turn are altering primate habitats. As temperatures rise and precipitation patterns change, many forested areas are experiencing shifts in plant species composition, with some areas transitioning from tropical forests to savanna-like environments. This "savannization" process is particularly pronounced in regions like the Amazon, where the expansion of savannas at the expense of tropical forests is expected to have severe consequences for terrestrial mammals, including primates (Rocha et al., 2023). These changes can disrupt the availability of food resources, such as fruiting trees, which are crucial for many primate species. For example, in the Brazilian Atlantic Forest, changes in climate are predicted to alter the distribution of tree species that are vital for golden-headed lion tamarins (Leontopithecus chrysomelas), potentially leading to a reduction in suitable habitats (Raghunathan et al., 2015). As vegetation patterns continue to shift, primates that are specialized to specific forest types or dependent on particular plant species may struggle to survive, making them more vulnerable to extinction. 4 Direct Effects of Climate Change on Primate Physiology 4.1 Impact of temperature changes on primate thermoregulation Temperature fluctuations due to climate change have significant effects on primate thermoregulation, challenging their ability to maintain homeostasis. As global temperatures rise, primates must adapt to avoid hyperthermia, especially in regions where heatwaves become more frequent. Studies on vervet monkeys (Chlorocebus pygerythrus) have shown that these primates rely on behavioral adaptations such as seeking shade and altering their activity patterns to regulate body temperature. However, despite these strategies, extreme temperature increases can still lead to physiological stress, potentially compromising survival. For instance, higher ambient temperatures correlate with increased body temperature minima and maxima, placing additional strain on primate species already facing habitat loss (McFarland et al., 2019). Additionally, the metabolic costs of thermoregulation rise as primates expend more energy to cope with heat, reducing the energy available for other critical functions like foraging and reproduction. As temperature extremes become more common, the thermoregulatory capacity of primates may be overwhelmed, leading to shifts in distribution, changes in population dynamics, or even local extinctions. 4.2 Effects on Primate Reproductive Biology and Development Climate change also impacts primate reproductive biology, influencing both fertility rates and developmental processes. Rising temperatures and associated environmental stresses, such as food scarcity, can disrupt the
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 112 hormonal regulation critical for reproduction. High temperatures have been linked to reduced sperm quality and altered ovarian cycles in some primate species, leading to lower reproductive success. For example, environmental stressors related to climate change can interfere with the hypothalamic-pituitary-gonadal axis, affecting the release of hormones that are essential for reproductive activities (ShikhMaidin, 2021). Additionally, prolonged exposure to heat stress during gestation can negatively impact fetal development, resulting in lower birth weights or higher infant mortality rates. These reproductive challenges are compounded by other factors such as habitat fragmentation and food scarcity, which are exacerbated by climate change. As a result, primates may experience longer interbirth intervals and decreased population growth, further threatening their survival. 4.3 Changes in disease patterns and their impact on primate health Climate change is altering the distribution and prevalence of infectious diseases, posing new health risks to primate populations. Warmer temperatures and changing precipitation patterns can expand the range of disease vectors such as mosquitoes and ticks, increasing primate exposure to diseases like malaria, dengue, and Lyme disease. For instance, shifts in temperature and humidity can enhance the survival and reproduction rates of these vectors, leading to more frequent outbreaks of vector-borne diseases (Lacetera, 2018). Moreover, primates living in fragmented habitats may face heightened disease transmission due to closer proximity to human settlements and livestock, which are reservoirs for various pathogens. The resulting increase in disease burden can lead to higher mortality rates, reduced reproductive success, and overall population declines. Climate-induced changes in disease dynamics not only threaten individual primates but also have broader implications for the stability and resilience of entire ecosystems. As diseases become more prevalent and spread to new areas, the long-term viability of many primate species may be at risk. 5 Impact on Primate Food Resources 5.1 How climate change affects the availability of food resources Climate change is altering the availability of food resources for primates by impacting the growth, distribution, and abundance of plant species that provide critical food sources. Rising temperatures, changes in precipitation patterns, and increased frequency of extreme weather events are causing shifts in the phenology of fruiting and flowering plants, leading to a mismatch between the timing of food availability and primate dietary needs. For example, studies have shown that fruit production in tropical forests is becoming more unpredictable, with some key fruit species producing less frequently or outside the usual seasons due to climatic shifts (Mendoza et al., 2017). These changes can lead to periods of food scarcity, forcing primates to adapt their foraging strategies, which may result in increased energy expenditure and reduced nutritional intake. In areas like Madagascar, where primates such as the black-and-white ruffed lemur (Varecia variegata) are highly dependent on specific fruiting patterns, the increased unpredictability of food resources could threaten their survival (Beeby et al., 2023). The overall impact of climate change on food availability is likely to vary across different primate habitats, but the trend towards greater unpredictability poses a significant risk to species that rely on consistent and abundant food supplies. 5.2 Shifts in fruiting patterns and plant phenology Climate change is driving significant shifts in the phenology of plants, particularly in the timing of fruiting and flowering, which directly impacts primates that rely on these resources. The seasonal availability of fruits is crucial for frugivorous primates, and any alteration in fruiting patterns can have cascading effects on their health and reproduction. Research has documented that in some tropical forests, fruiting events are becoming less synchronized, with fewer species fruiting simultaneously, leading to a reduced abundance of available fruits at any given time (Mendoza et al., 2017). Additionally, the phenology of fruit trees is increasingly influenced by climatic factors such as temperature and rainfall variability, which can lead to delayed or advanced fruiting seasons. For example, the Hainan gibbon (Nomascus hainanus) faces severe food scarcity during certain times of the year due to shifts in the fruiting phenology of its primary food sources, exacerbated by climate change (Xue et al.,
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 113 2023). These disruptions in fruiting patterns not only affect the availability of food but also the quality and nutritional content of the fruits, further complicating the foraging strategies of primates (Figure 1). Figure 1 Phenological patterns of flowering and fruiting in tree species utilized as food by the Hainan Gibbon (Adopted from Xue et al., 2023) Note: Number of species in their first flowering period per month (A); Number of species in their first fruiting period per month (B); Number of species in their peak flowering period per month (C); Number of species in their peak fruiting period per month (D); (Adopted from Xue et al., 2023) 5.3 Implications for primate foraging behavior and diet composition As climate change alters the availability and timing of food resources, primates are forced to adapt their foraging behavior and diet composition to cope with these changes. In many cases, primates must expand their dietary breadth to include less preferred or lower-quality food items, such as leaves or bark, during periods of fruit scarcity. This dietary flexibility is crucial for survival but often comes with trade-offs, including increased foraging time, reduced energy efficiency, and potential exposure to new risks, such as increased predation or competition with other species (DePasquale et al., 2023). For instance, the common marmoset (Callithrix jacchus) has been observed to alter its diet significantly in response to seasonal variations in fruit availability, relying more heavily on alternative food sources like exudates and invertebrates when fruits are scarce (Souza-Alves et al., 2021). These changes in diet and foraging behavior can have long-term effects on primate health, reproduction, and social dynamics, as the energetic costs of adapting to a changing environment may lead to lower reproductive success and slower population growth. Ultimately, the ongoing impact of climate change on food resources will likely increase the vulnerability of primate populations, particularly those with specialized diets or limited habitat ranges. 6 Behavioral Adaptations of Primates to Climate Change 6.1 Observed changes in primate behavior in response to climate stressors Climate change imposes significant stress on primate populations, leading to observable shifts in their behavior. Primates are known to adjust their activity patterns to cope with extreme temperatures, droughts, and other climatic stressors. For example, during periods of extreme heat or drought, vervet monkeys (Chlorocebus
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 114 pygerythrus) in South Africa have been observed to increase resting behavior while reducing foraging and social activities. This behavioral change helps them conserve energy and avoid overheating but also leads to reduced food intake and social interaction, which can impact their overall health and reproductive success (Young et al., 2019) (Fgure 2). Figure 2 Interaction of number of days without water and variation in food availability on fGCMs (Model1food+water; N = 346) (Adopted from Young et al., 2019) Note: Water availability is split into (1) none (no water available in the previous 30 days; red line), (2) some days (mean value: water available for 24 of the previous 30 days; green line, this represents the mean score for this variable) and all days (water available on all of the previous 30 days; blue line). Food availability is measured as the NDVI score of the previous 14 days. Food availability is z-transformed. Shown are the marginal effects of the interaction of food and water availability on log-transformed fGCM concentrations in nanograms per gram (y-axis). These categories were used only for illustrative purposes; water availability was entered as a continuous variable in all models (Adopted from Young et al., 2019) Additionally, studies on the African lesser bushbaby (Galago moholi) have shown that individuals living in urban environments exhibit increased sociality and altered movement patterns compared to those in rural settings, likely as an adaptive response to the changed environmental conditions brought about by urbanization and climate change (Scheun et al., 2019). These examples underscore the importance of behavioral flexibility in helping primates cope with the direct effects of climate change. 6.2 Migration, Range Shifts, and Changes in Social Structure As climate change alters habitats, many primate species are forced to migrate or shift their ranges to maintain access to suitable environmental conditions. This migration can lead to significant changes in social structures as primates adapt to new environments. For instance, primates in the Amazon are predicted to experience range contractions and expansions due to changing climate conditions, with some species moving to higher altitudes or latitudes to escape rising temperatures (Sales et al., 2020). These range shifts can lead to the fragmentation of populations, disrupting established social groups and altering mating systems, foraging behavior, and intergroup interactions. Additionally, changes in habitat availability can force primates to form new social bonds or compete more intensely for resources in shrinking habitats. In cases where migration is not possible, primates may exhibit increased behavioral plasticity, altering their social structures to cope with the stressors introduced by climate change. However, such changes can be double-edged, offering short-term survival benefits while potentially leading to long-term vulnerabilities due to loss of genetic diversity and increased conflict within and between groups.
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 115 6.3 Potential for Behavioral Plasticity to Buffer Against Climate Impacts Behavioral plasticity is a critical mechanism that allows primates to adapt to rapidly changing environments caused by climate change. This plasticity enables primates to modify their foraging strategies, social behaviors, and habitat use in response to new environmental challenges. For example, studies on various primate species suggest that those with high behavioral flexibility, such as the ability to alter diet or adjust activity patterns, may be better equipped to survive in altered climates (Kalbitzer & Chapman, 2018). However, while behavioral plasticity can buffer against immediate environmental changes, it may not be sufficient to ensure long-term survival if the pace of climate change exceeds the species' ability to adapt. Additionally, there is a paradoxical aspect to plasticity; while it can help populations cope in the short term, it may reduce the pressure for genetic adaptation, potentially leading to long-term population declines (Nunney, 2016). As such, conservation efforts must consider both the immediate benefits and potential long-term risks of relying on behavioral plasticity as a strategy for primate survival in the face of climate change. 7 Case Study: Impact of Climate Change on the Golden Lion Tamarin (Leontopithecus rosalia) 7.1 Background on the golden lion tamarin and its habitat The Golden Lion Tamarin (Leontopithecus rosalia) is an endangered primate species native to the Atlantic coastal forests of Brazil, specifically in the state of Rio de Janeiro. Recognized for its striking golden-orange fur, this species plays a vital ecological role as a seed disperser, contributing to forest regeneration. The Atlantic Forest, once a vast and continuous biome, is now severely fragmented, with only about 12% of its original cover remaining. These forest fragments are often small, isolated, and surrounded by agricultural land or urban development, which exacerbates the vulnerability of the golden lion tamarin to habitat degradation and loss. The species is currently found in scattered forest patches, many of which are on private lands, making conservation efforts particularly challenging (Moraes et al., 2017; Dosen et al., 2017). Despite significant efforts to restore and connect these habitats, the tamarins remain at high risk due to their limited range and the ongoing threats from climate change and human activities. 7.2 Specific climate-related challenges faced by this species Climate change presents several direct and indirect threats to the golden lion tamarin. One of the primary challenges is the alteration of its habitat due to shifting climate conditions, which affect the distribution and health of the plant species that these tamarins rely on for food and shelter. Studies indicate that climate change could lead to a reduction in the availability of key fruiting trees, potentially resulting in food shortages for the tamarins (Raghunathan et al., 2015) (Figure 3). Additionally, increased frequency and severity of storms, driven by climate change, can lead to further habitat destruction and fragmentation, compounding the challenges already posed by deforestation. The widening of major highways within the tamarin's range is another significant threat, as it further fragments their habitat and increases mortality from road traffic, potentially undoing decades of conservation work (Ascensão et al., 2019). These challenges underscore the urgency of integrating climate resilience into conservation strategies to ensure the long-term survival of the species. 7.3 Conservation strategies and their effectiveness in the face of climate change Conservation efforts for the golden lion tamarin have focused on habitat restoration, the creation of ecological corridors, and the management of small, isolated populations. Reforestation initiatives aim to connect fragmented habitats, allowing tamarins to move between patches and maintain genetic diversity. Restoration strategies that prioritize riparian forests and canopy bridges have been shown to improve functional connectivity, which is crucial for species survival (Dosen et al., 2017). However, climate change introduces new complexities. For instance, the success of reforestation efforts may be hindered if the tree species planted are not resilient to future climatic conditions. Additionally, recent studies
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 116 highlight the need for climate-adaptive management practices, such as incorporating climate models into conservation planning to identify areas that will remain suitable for tamarins under different climate scenarios (Rezende et al., 2020). Despite these challenges, the continued focus on habitat connectivity and adaptive management offers hope for mitigating the impacts of climate change on this endangered species. Figure 3 Visual comparison between actual vegetation map and biome distribution simulated by the model for present-day (1961–1990) scenario (Adopted from Raghunathan et al., 2015) Note: Map on right adapted fromInstituto Brasileiro de Geografia e Estatı´sticas, The figure shows the phenomenon of subtropical forest biomes being replaced by tropical rainforests, with the most significant changes occurring under the A2 scenario. The figure aims to illustrate the differences between the model-predicted biome distribution and the actual vegetation map, helping to understand the impact of climate change on different biomes (Adapted from Raghunathan et al., 2015). 8 Climate Change, Human Activities, and Primate Conservation 8.1 Interaction between climate change and anthropogenic pressures Climate change and human activities, such as deforestation, agriculture, and hunting, are increasingly intersecting to amplify threats to primate populations. As climate change shifts habitats and alters the availability of resources, primates are forced into smaller, fragmented areas, often closer to human populations. This proximity exacerbates pressures from hunting and agricultural expansion. For instance, in China, human activities combined with climate change have significantly reduced the habitats of many primate species, pushing them into isolated and vulnerable populations (Li et al., 2023). Additionally, in regions like the Amazon, the expansion of agriculture and cattle ranching has driven deforestation, which, when coupled with climate-induced changes, further fragments primate habitats, making it difficult for species to survive (Costa-Araújo et al., 2022). The cumulative effect of these pressures has led to an increase in the extinction risk for many primates, with climate change acting as a multiplier of existing threats. 8.2 Role of Protected Areas and Their Effectiveness in a Changing Climate Protected areas (PAs) have long been the cornerstone of conservation strategies, providing refuges for primates and other wildlife. However, the effectiveness of these areas is being challenged by climate change. As climate conditions shift, some PAs may no longer provide suitable habitats for the species they were designed to protect. In Indonesia, for example, studies have shown that many protected areas will experience significant declines in species richness under future climate scenarios, raising concerns about their long-term viability (Condro et al., 2021). Moreover, the rigid boundaries of PAs may prevent species from migrating to more suitable habitats as the climate changes, leading to localized extinctions. Despite these challenges, there is evidence that PAs can still play a crucial role in mitigating climate impacts, especially when they are strategically expanded or connected through ecological corridors (Moraes et al., 2020). Adaptive management practices that incorporate climate projections into conservation planning are essential to enhance the resilience of PAs in the face of ongoing environmental changes.
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 117 8.3 Conservation Policies and Their Alignment with Climate Change Mitigation Conservation policies must evolve to address the dual threats of climate change and human activities. Traditional approaches, which focus primarily on protecting specific species or habitats, are increasingly inadequate in a rapidly changing climate. Instead, there is a growing recognition of the need for policies that are flexible and adaptive, capable of responding to shifting ecological realities. For example, policies in Australia have begun to emphasize the importance of adaptive management, which allows for adjustments to conservation strategies as new information and conditions emerge (McDonald et al., 2018). Similarly, global conservation efforts are increasingly integrating climate change mitigation into their frameworks, recognizing that protecting primates requires not only preserving habitats but also addressing the broader drivers of climate change, such as deforestation and carbon emissions (Stewart et al., 2020). Effective conservation in the 21st century will depend on the ability of policies to align biodiversity protection with climate mitigation, ensuring that both goals are pursued simultaneously. 9 Future Projections and Modeling Impacts on Primate Populations 9.1 Use of Climate Models to Predict Future Habitat Suitability for Primates Climate models are essential tools for predicting the future habitat suitability of primate species as global temperatures continue to rise. These models incorporate variables such as temperature, precipitation, and land-use changes to estimate how primate habitats might shift or contract over time. For example, research using species distribution models (SDMs) has shown that the habitats of many primate species, including those in the Amazon and African rainforests, are likely to shrink significantly by 2050 due to climate change (Carvalho et al., 2019). In addition, the integration of land-use and climate models has revealed that even widespread and adaptable species, such as baboons, may face significant range contractions under future climate scenarios (Hill and Winder, 2019). These models are crucial for identifying priority areas for conservation and understanding the potential long-term impacts of climate change on primate populations. However, the accuracy of these predictions depends on the quality of input data and the assumptions made regarding species' dispersal abilities and behavioral adaptability. 9.2 Potential Scenarios for Primate Population Declines or Resilience Future scenarios for primate populations vary widely, ranging from severe declines to potential resilience, depending on the species' ability to adapt to changing environments. In worst-case climate scenarios, primates in tropical regions, such as the Amazon, are expected to lose over 50% of their current range, with some species facing near-total habitat loss (Sales et al., 2020). Conversely, some models suggest that certain primates may find new suitable habitats if they can disperse to higher altitudes or latitudes, although this would likely lead to fragmented populations and reduced genetic diversity (Carvalho et al., 2020). The resilience of primate populations will largely depend on factors such as their ecological flexibility, reproductive rates, and the extent of human interference in their habitats. For instance, primates that can exploit a wide range of habitats and diets, like some species of baboons, may fare better than highly specialized species with narrow ecological niches. 9.3 Limitations of Current Models and the Need for Improved Predictive Tools Despite their usefulness, current climate models have several limitations that affect their predictive power. One major limitation is the assumption that species will be able to disperse freely across the landscape, which does not account for barriers such as deforestation, urbanization, and other forms of habitat fragmentation (Zhao et al., 2019). Additionally, many models focus primarily on abiotic factors like temperature and rainfall, while underestimating the role of biotic interactions, such as competition, predation, and disease, which can significantly impact species distributions. Furthermore, the genetic and demographic processes that influence population resilience are often overlooked, limiting the models' ability to predict long-term evolutionary outcomes (Brown et al., 2016). To improve the
International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.2, 109-121 http://ecoevopublisher.com/index.php/ijmec 118 accuracy and reliability of future projections, there is a need for more integrative models that combine climate data with land-use changes, species-specific dispersal abilities, and genetic factors. This holistic approach would provide a more comprehensive understanding of how primate populations might respond to the multifaceted challenges posed by climate change. 10 Concluding Remarks This review highlights the profound impacts of climate change on primate populations and habitats, emphasizing the multifaceted nature of these challenges. Key findings include the significant alterations in habitat suitability due to temperature and precipitation changes, the compounding effects of deforestation and habitat fragmentation, and the critical role of behavioral adaptations in primate survival. Climate models predict substantial range reductions for many primate species, with potential for increased vulnerability due to isolated populations and reduced genetic diversity. Moreover, while some conservation strategies have been effective, the ongoing and future impacts of climate change necessitate adaptive and integrated approaches that incorporate both climate resilience and habitat restoration. To mitigate the impacts of climate change on primate populations, conservation strategies must be both proactive and adaptive. Key recommendations include expanding and connecting protected areas to allow for species migration, integrating climate projections into conservation planning, and focusing on preserving genetic diversity through managed relocations and breeding programs. Additionally, conservation efforts should incorporate community involvement and address the socioeconomic factors driving habitat destruction. Strengthening policies that align conservation goals with climate change mitigation, such as reducing carbon emissions from deforestation and promoting sustainable land use, is also crucial for long-term primate survival. Given the complexities of climate change and its effects on primate populations, further research is essential to fill existing knowledge gaps. There is a need for long-term ecological studies that track changes in primate behavior, health, and population dynamics in response to climate variability. Additionally, more refined climate models that consider species-specific ecological needs and genetic data will improve predictions of future habitat suitability. Interdisciplinary collaboration, integrating biological, social, and climate sciences, is critical to developing holistic conservation strategies that are responsive to the evolving challenges posed by climate change. Such collaboration will also enhance the effectiveness of conservation education and policy advocacy, ensuring that conservation measures are both scientifically grounded and socially sustainable. Acknowledgments We would like to thank two anonymous peer reviewers for their suggestions on my manuscript.. Conflict of Interest Disclosure The authors affirm that this research was conducted without any commercial or financial relationships that could be construed as a potential conflict of interest. References Ascensão F., Niebuhr B., Moraes A.M., Alexandre B.R., Assis J., Alves-Eigenheer M., Ribeiro J., De Morais M., Martins A., De Oliveira A., Moraes E., Ramos J., Lorini M., Ferraz L., Culot L., Dietz J., Ruiz-Miranda C., and Ruiz-Miranda C., 2019, End of the line for the golden lion tamarin? A single road threatens 30 years of conservation efforts, Conservation Science and Practice, 1: e89. https://doi.org/10.1111/csp2.89 Beeby N., Rothman J.M., and Baden A.L., 2023, Nutrient balancing in a fruit-specialist primate, the black-and-white ruffed lemur (Varecia variegata), American Journal of Primatology, 42: 1-8. https://doi.org/10.1002/ajp.23484 PMid:36891766 Bernard A.B., and Marshall A., 2020, Assessing the state of knowledge of contemporary climate change and primates, Evolutionary Anthropology: Issues, News, and Reviews, 29(6): 317-331. https://doi.org/10.1002/evan.21874 PMid:33331061
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