Climate extremes are associated with invertebrate taxonomic and functional composition in mountain lakes.
Climate extremes are associated with invertebrate taxonomic and functional composition in mountain lakes.
复制标题
极端气候与山湖中无脊椎动物分类学和功能组成有关。
DOI：
10.1002/ece3.2517
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发表时间：
2016-11
影响因子：
2.6
通讯作者：
Siepielski, Adam M.
中科院分区：
文献类型：
--
作者：
Boersma, Kate S.;Nickerson, Avery;Francis, Clinton D.;Siepielski, Adam M.
关键词：
预计气候变化将增加气候变异和极端气候事件的发生，对水生生态系统具有潜在的破坏性影响。然而，人们对极端气候在构建水生群落中的作用或气候与当地非生物和生物因素之间的相互作用知之甚少。在这里，我们研究气候和当地的非生物和生物条件对湖泊无脊椎动物的生物多样性和群落结构的相对影响。我们在美国加州的19个湖泊中采集了水生无脊椎动物样本，并测量了环境变量，以检验气候、当地生物和环境条件以及水生无脊椎动物群落的分类和功能结构之间关系的假设。我们发现，虽然当地的生物和非生物因素，如栖息地的可用性和电导率是最一致的预测α多样性，极端气候条件，如夏季最高温度和旱季降水量最常与多变量分类和功能组成。具体而言，最高温度高，旱季降水量低的地点居住着含有大量大型捕食性类群的社区。此外，气候差异和非生物差异决定了站点之间的分类营业额（β多样性）。这些研究结果表明，虽然当地规模的环境变量可以预测α多样性，但在预测大规模水生生物群落对下世纪世界大部分地区预期的极端温度和降水事件的反应时，气候变化是重要的考虑因素。
Climate change is expected to increase climate variability and the occurrence of extreme climatic events, with potentially devastating effects on aquatic ecosystems. However, little is known about the role of climate extremes in structuring aquatic communities or the interplay between climate and local abiotic and biotic factors. Here, we examine the relative influence of climate and local abiotic and biotic conditions on biodiversity and community structure in lake invertebrates. We sampled aquatic invertebrates and measured environmental variables in 19 lakes throughout California, USA, to test hypotheses of the relationship between climate, local biotic and environmental conditions, and the taxonomic and functional structure of aquatic invertebrate communities. We found that, while local biotic and abiotic factors such as habitat availability and conductivity were the most consistent predictors of alpha diversity, extreme climate conditions such as maximum summer temperature and dry‐season precipitation were most often associated with multivariate taxonomic and functional composition. Specifically, sites with high maximum temperatures and low dry‐season precipitation housed communities containing high abundances of large predatory taxa. Furthermore, both climate dissimilarity and abiotic dissimilarity determined taxonomic turnover among sites (beta diversity). These findings suggest that while local‐scale environmental variables may predict alpha diversity, climatic variability is important to consider when projecting broad‐scale aquatic community responses to the extreme temperature and precipitation events that are expected for much of the world during the next century.
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影响因子：
3.7
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Chiu CH;Chao A
通讯作者：
Chao A
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