ABSTRACT Due to climate change damaging terrestrial ecosystems and threatening biodiversity, the conservation of cave‐endemic lineage has garnered growing attention, as they serve as unique model systems for studying climate sensitivity, distributional constraints, and extinction risk. Given the limited research on endemic species, this study aims to identify the limiting factors, distribution range, and future changes in suitable habitats for the endemic species Bisetocreagris , thereby providing a scientific basis for the conservation of cave ecosystems. We used 44 distribution points and a MaxEnt model to predict Bisetocreagris distribution, integrating seven environmental variables and three emission scenarios to assess climate‐driven habitat changes. The results indicate that factors such as Bio14, Bio2, and Bio7 collectively characterize the dependence of cave‐endemic lineages on stable microenvironments and the potential limits of their physiological tolerance, reflecting the niche specialization that has evolved in the genus Bisetocreagris during its long‐term adaptation to cave environments. Under current climate conditions, Bisetocreagris has a highly suitable growth area of 97.1877 × 10 4 km 2 , which is primarily concentrated in southeastern China, with the widest distribution in Guizhou Province. Under various carbon emission scenarios, the potential suitable area consistently decreases. The high‐carbon‐emission SSP5–8.5 pathway has the most significant impact on high‐suitability area, resulting in a 97.8808% reduction by the 2090s compared to the present, leaving an area of only 2.0596 × 10 4 km 2 . The narrow distribution ranges, specialized ecological niches, and limited dispersal capacity observed in Bisetocreagris are traits shared by many arachnids. The response patterns revealed in this study may therefore extend beyond the focal genus to reflect broader vulnerabilities within the class Arachnida. Consequently, this research not only provides a scientific basis for habitat conservation and priority area identification for Bisetocreagris but also offers a transferable framework for assessing climate change vulnerability across other arachnids.
Liu et al. (Wed,) studied this question.
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