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Critical shifts on spatial traits and the risk of extinction of Andean anurans: an assessment of the combined effects of climate and land-use change in Colombia
Perspectives in Ecology and Conservation ( IF 4.0 ) Pub Date : 2019-11-23 , DOI: 10.1016/j.pecon.2019.11.002
William José Agudelo-Hz , Nicolás Urbina-Cardona , Dolors Armenteras-Pascual

Climate and land-use change, raise significant threats to biodiversity, affecting species ranges worldwide. Both factors operate on different scales, so including spatial traits that allow them to be appropriately evaluated is relevant to the early identification of extinction risks. We aimed to evaluate the potential effects of climate and land-use change on the extent of suitable habitat of a set of species of Andean anurans; to assess the loss of the area of occupancy (AOO); and to estimate the risk of extinction according to the percentages of loss of the extent of suitable habitat and AOO. We modeled the current and future potential distributions of 30 endemic anurans from the Colombian Andes. We calculated the change in current potential distributional ranges and in the extent of suitable habitat under two climatic regimes and land-use scenarios. We quantified the AOO using the 2 × 2 km grid method and assessed its loss based on habitat availability in the combined scenarios. We used the percentage losses of the extent of suitable habitat and AOO to estimate and compare the extinction risks according to IUCN criteria. We found that climate and land-use change will cause a relative loss of 63.4 % to 79.4 % of the current extent of suitable habitat and 49.6 % to 72.6 % of AOO of the Andean anurans by the year 2050. The loss of AOO made it possible to detect twice as many species at high risk of extinction than the loss of the extent of suitable habitat. The effects of climate change and habitat loss could lead to potential extinction events in Andean frogs. Extent of suitable habitat, and especially the area of occupancy are appropriate spatial traits that could be used to assess extinction risks in species sensitive to local habitat modification by climate change and land-use change.



中文翻译:

空间特征的重大转变和安第斯无尾熊灭绝的风险:对哥伦比亚气候和土地利用变化的综合影响的评估

气候和土地利用的变化,对生物多样性构成重大威胁,影响着全世界的物种范围。这两个因素在不同的尺度上起作用,因此包括可以对其进行适当评估的空间特征与早期识别灭绝风险有关。我们旨在评估气候和土地利用变化对一系列安第斯无脊椎动物物种的适宜生境的潜在影响;评估占用面积(AOO)的损失;并根据丧失适当栖息地和AOO程度的百分比估算灭绝的风险。我们模拟了来自哥伦比亚安第斯山脉的30种地方性无尾熊的当前和未来的潜在分布。我们计算了两种气候制度和土地利用情景下当前潜在分布范围和合适栖息地范围的变化。我们使用2×2 km网格方法对AOO进行了量化,并根据组合方案中栖息地的可用性评估了其损失。我们使用了适当栖息地和AOO范围的损失百分比来根据IUCN标准估算和比较灭绝风险。我们发现,到2050年,气候和土地利用的变化将造成当前适当栖息地范围的相对损失63.4%至79.4%,占安第斯无脊椎动物的AOO的49.6%至72.6%。在高灭绝风险中发现的物种数量可能是丧失适当栖息地范围的两倍。气候变化和栖息地丧失的影响可能导致安第斯青蛙的潜在灭绝事件。适当的生境的范围,尤其是居住面积是适当的空间特征,可用于评估对因气候变化和土地利用变化而对当地生境的改变敏感的物种的灭绝风险。

更新日期:2019-11-23
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