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南昆山省级自然保护区两栖动物多样性研究

Study on the diversity of amphibians in Nankunshan Provincial Nature Reserve

  • 摘要: 为掌握广东龙门南昆山省级自然保护区两栖动物资源现状,本研究采用样线调查法为主、历史资料整理为辅的方法,系统记录两栖动物物种组成,并进行区系分析、生态类型划分、濒危等级评估及省内保护区对比分析。结果表明如下。(1)南昆山自然保护区目前共记录两栖动物42种,隶属于2目8科26属。其中,有尾目1科1属1种,无尾目7科25属41种。蛙科(Ranidae)和叉舌蛙科(Dicroglossidae)为主要类群,分别记录6属14种和5属6种,分别占总物种数的33.33%和14.29%。(2)区系组成具有典型的东洋界特征,以东洋界华南区物种为主,共有16种,占38.10%。(3)生态类型以陆栖静水型最为丰富,有22种,占比为52.38%;其次为树栖型和溪流型,分别有9种和7种,占比为21.43%和16.67%。(4)珍稀濒危物种丰富,国家Ⅱ级重点保护野生动物2种,广东省重点保护动物4种,国家“三有”保护动物26种;《中国脊椎动物红色名录》中濒危物种4种、易危3种、近危5种、未评估6种。(5)在现有可比数据下,南昆山两栖动物物种丰富度较高。总体而言,南昆山自然保护区两栖动物物种多样性丰富,中国特有种和模式产地物种较多,其中南昆山角蟾、南昆山琴蛙以本区为模式产地,在广东省两栖动物多样性保护中具有重要地位,应加强栖息地保护与长期监测。

     

    Abstract: To understand the current status of amphibian resources in Nankunshan Provincial Nature Reserve, Guangdong province, we conducted line-transect surveys supplemented by historical records, and analyzed species composition, faunal characteristics, ecological types, conservation status and comparisons with other protected areas in Guangdong. The results showed that: (1) a total of 42 amphibian species were recorded, belonging to 2 orders, 8 families and 26 genera. The order Caudata contained 1 family, 1 genus and 1 species, whereas the order Anura contained 7 families, 25 genera and 41 species. Ranidae and Dicroglossidae were the main families, with 6 genera and 14 species and 5 genera and 6 species, accounting for 33.33% and 14.29% of the total species, respectively. (2) The fauna showed typical Oriental-realm characteristics, dominated by species from the South China region, with 16 species accounting for 38.10%. (3) The dominant ecological type was terrestrial still-water species, with 22 species accounting for 52.38%, followed by arboreal species and stream-dwelling species, with 9 and 7 species accounting for 21.43% and 16.67%, respectively. (4) The reserve supported rich rare and threatened species, including 2 species under national Class II protection, 4 species under Guangdong provincial key protection, and 26 species listed as terrestrial wildlife of important ecological, scientific or social value. In the Red List of China’s Vertebrates, 4 species were Endangered, 3 were Vulnerable, 5 were Near Threatened, and 6 were Not Evaluated. (5) Under the currently comparable data, amphibian species richness in Nankunshan was relatively high. Overall, Nankunshan Provincial Nature Reserve has high amphibian diversity and notable endemism, including two type-locality species, Boulenophrys nankunensis and Nidirana nankunensis, and is important for amphibian diversity conservation in Guangdong Province.

     

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