International Journal of Molecular Ecology and Conservation, 2025, Vol.15, No.5, 229-239 http://ecoevopublisher.com/index.php/ijmec 23 6 6.2 Ecological consequences of loss of epiphytic plant diversity The loss of epiphytic plant diversity will lead to a decline in the service functions of forest ecosystems. Services such as water conservation, microclimate regulation, and provision of biological habitats may all be compromised. Especially in mountainous cloud forests, epiphytic mosses are important "water towers", and their decline will directly affect the stability of water supply in the basin (Werner and Homeier, 2024). The disappearance of epiphytes as indicators also means that the environment has deteriorated to a point where it is difficult to support sensitive species. This not only has an impact on the natural ecosystem, but is also related to human well-being: for instance, the disappearance of lichens means a deterioration in air quality, which may endanger human health. Therefore, although the loss of epiphytes often occurs in the high parts of the forest canopy that are not easily noticed by us, its ecological consequences will gradually spread to the entire forest and even the external environment along the material and energy transfer pathways. It should be emphasized here that the lag in the loss of epiphytic plant diversity may mask its severity (Kromer et al., 2025). When the forest is disturbed, large life forms such as trees may still survive for a while, but the population of epiphytic plants may have already shrunk. In such "empty shell forests", the trees are still there, but their ecological functions have significantly weakened. It is only after a relatively long period of time that we will observe obvious consequences such as soil degradation and deteriorating water quality, but by then epiphytes have long disappeared. Therefore, the disappearance of epiphytes can be regarded as a precursor to the decline of forest ecological functions. This also gives us a warning: when the diversity of epiphytic plants drops sharply, it is the moment when ecological management needs urgent intervention. 6.3 Protection and recovery strategies Given the significant ecological importance and threats faced by epiphytes, it is imperative to enhance their protection. The protection of epiphytic plants cannot be carried out in isolation but should be integrated into the overall protection and restoration of forest ecosystems. The protection of primary forests is fundamental. Without healthy forests, epiphytic plants are out of the question. But paying attention to these hidden little lives at the same time can make forest protection more complete and in-depth (Koster et al., 2009). Fortunately, some regions have begun to pay attention to epiphytes: for instance, Mexico has taken measures to protect ancient oak trees to preserve their epiphytic lichen communities, and Costa Rica has developed the "Orchid Route" ecotourism to enhance community conservation enthusiasm, etc. These explorations indicate that by integrating scientific research, community and policy, it is possible to protect epiphytes while taking into account human interests (Richards, 2020). In addition, public education should be strengthened to enhance the awareness of the value of epiphytic plants and avoid behaviors such as artificial picking and collection (Santos-Escamilla et al., 2024). Many people lack understanding of epiphytes and even mistakenly think they are harmful and remove them (for example, some people think that moss on trees is harmful to trees and scrape it off). Education can correct these misunderstandings and make the public realize that epiphytes are the "hanging gardens" of the forest and deserve to be cared for. 7 Concluding Remarks Epiphytes are a key but long-neglected component of forest ecosystems. Although they "reside" on high branches, they profoundly influence the structure and function of the forest in various ways. Epiphytic plants highly enrich the biodiversity of the forest: from large ferns to small mosses, they form a unique life community in the forest canopy. They provide micro-habitats, nourish numerous invertebrates and amphibians, form a "forest aerial ecological network", and offer essential conditions for the reproduction of some endemic species. In terms of material circulation, epiphytes promote nutrient cycling and regulate water balance by intercepting rain and mist and accumulating fallen debris, effectively serving as soil and water conservators and nutrient accumulators in the forest canopy. To a certain extent, they also contribute to the carbon sink function of forests, enabling them to fix and store more carbon and smooth out fluctuations during the carbon cycle.
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