中国两栖类物种受威胁态势及地理格局
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国家自然科学基金项目(42371430)


Threat status and geographic patterns of amphibian species in China
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    摘要:

    两栖动物在全球范围内面临严重威胁,系统识别其高风险类群及空间分布特征是制定有效保护策略的关键。基于中国两栖类物种分布和濒危等级数据,在考虑数据不足物种潜在灭绝风险的基础上,通过受威胁物种丰富度、受威胁物种比例和稀有度加权丰富度(Rarity-Weighted Richness, RWR)刻画两栖类灭绝风险的地理格局,并结合物种分类信息分析受威胁物种所属类群构成及区域差异。结果显示,有尾两栖类的灭绝风险明显高于无尾两栖类,物种分布区域更为狭窄;隐鳃鲵科、小鲵科、蝾螈科与角蟾科是受威胁程度最高的科;在科水平上灭绝风险与系统发育特征有关,分化较晚的科受威胁比例更高;共识别44种特有性高、分布狭窄的受威胁两栖类物种;受威胁物种丰富度、受威胁物种比例和RWR的空间分布存在差异,RWR揭示了物种丰富度难以反映的高特有性区域;四川南部、云南中部与海南是三类指标的高值重叠区;不同科的受威胁物种分布在不同区域。研究结果可为国家尺度上两栖动物保护区识别、优先保护物种确定等生物多样性保护决策提供依据。

    Abstract:

    Amphibians are facing severe threats globally, and systematically identifying high-risk taxa and their spatial distribution characteristics is key to developing effective conservation strategies. Based on species distribution and threat status data of amphibians in China, and incorporating the potential extinction risks of data deficient species, this study used threatened species richness, threatened species percentage, and rarity-weighted richness (RWR) to characterize the spatial patterns of amphibian extinction risk. Species classification information was further integrated to analyze taxonomic compositional and regional differences among amphibian groups. The results showed that Caudata had significantly higher extinction risk and narrower geographic ranges than Anura. Cryptobranchidae, Hynobiidae, Salamandridae, and Megophryidae were identified as the most threatened amphibian families. The extinction risk at the family level was associated with phylogenetic characteristics, with more recently diverged families exhibiting higher threatened species percentage. A total of 44 threatened amphibians were identified as range-restricted species, characterized by high endemism. Threatened species richness, threatened species percentage, and RWR showed distinct spatial patterns. Among them, RWR revealed additional regions of localized endemism that might be overlooked by species richness. Southern Sichuan, central Yunnan, and Hainan were identified as overlapping high-value areas across all three indicators. Threatened species from different families are distributed in different geographic regions. These findings provide a scientific basis for identifying conservation priority areas and selecting key species for biodiversity conservation at the national scale.

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徐子怡,吴赫,吴朝宁,李思青,戴文昱,王结臣.中国两栖类物种受威胁态势及地理格局.生态学报,2026,46(2):1135~1147

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