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Nature:研究揭示两栖动物面临的三种威胁

  1. Nature
  2. 两栖动物
  3. 威胁

来源:natureasia 2012-11-18 16:40

12月22日,国际著名杂志Nature在线刊登了国外研究人员的最新研究成果“Additive threats from pathogens, climate and land-use change for global amphibian diversity。”研究人员揭示了两栖动物面临的三种威胁。

12月22日,国际著名杂志Nature在线刊登了国外研究人员的最新研究成果“Additive threats from pathogens, climate and land-use change for global amphibian diversity。”研究人员揭示了两栖动物面临的三种威胁。

两栖动物是最濒危的脊椎动物类别,而三种最严重的威胁分别是气候变化、土地利用变化和真菌疾病“壶菌病”。对一组近乎完整的两栖动物物种所受到的这三种威胁之间的相互作用所做的一项分析显示,在有气候变化风险的地区与有土地利用变化风险的地区之间存在相当大程度的重叠。真菌疾病一般在不同区域都有发现,这与将气候变化与热带地区的疾病威胁联系起来的以前的研究结果是相矛盾的。但令人担忧的是,物种丰富度最大的区域是受到威胁程度最高的区域。(生物谷Bioon.com)

Additive threats from pathogens, climate and land-use change for global amphibian diversity

Christian Hof,Miguel B. Araújo,Walter Jetz& Carsten Rahbek

Amphibian population declines far exceed those of other vertebrate groups, with 30% of all species listed as threatened by the International Union for Conservation of Nature1, 2, 3. The causes of these declines are a matter of continued research, but probably include climate change, land-use change and spread of the pathogenic fungal disease chytridiomycosis1, 4, 5. Here we assess the spatial distribution and interactions of these primary threats in relation to the global distribution of amphibian species. We show that the greatest proportions of species negatively affected by climate change are projected to be found in Africa, parts of northern South America and the Andes. Regions with the highest projected impact of land-use and climate change coincide, but there is little spatial overlap with regions highly threatened by the fungal disease. Overall, the areas harbouring the richest amphibian faunas are disproportionately more affected by one or multiple threat factors than areas with low richness. Amphibian declines are likely to accelerate in the twenty-first century, because multiple drivers of extinction could jeopardize their populations more than previous, mono-causal, assessments have suggested.

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