Ecology of Cladocera species from Central America based on subfossil assemblages
Ecology of Cladocera species from Central America based on subfossil assemblages
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DOI：
10.4081/aiol.2016.6266
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发表时间：
2016-12
影响因子：
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通讯作者：
M. Wojewódka;E. Zawisza;Sergio Cohuo;L. Macario-González;A. Schwalb;Izabela Zawiska;L. Pérez
中科院分区：
文献类型：
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作者：
M. Wojewódka;E. Zawisza;Sergio Cohuo;L. Macario-González;A. Schwalb;Izabela Zawiska;L. Pérez
分析了中美洲（危地马拉、萨尔瓦多和洪都拉斯）29个湖泊表层沉积物中枝角类的种类组成。所研究的材料是在2013年秋季用Ekman抓斗从位于低地、高地和山区的湖泊中收集的。这项研究揭示了亚化石枝角类的定性和定量组成的高度变异性。共鉴定出31种枝角类（5种为浮游的，26种为沿岸的），以及4种无法鉴定的形态型（NRR 1-4）。浮游的Bosminidae和Daphniidae是最丰富的科。水蚤科仅限于山区水体，而Bosminidae广泛分布于不同非生物条件的湖泊。此外，Bosminidae物种也出现在高度矿化的沃茨（> 900 µS cm-1）。绝大多数枝角类物种属于沿岸的Chydoridae科。奇多罗斯比照球壳藻是最常见的物种（在20个湖泊中发现），这可能反映了它对各种生境条件的耐受性。聚类分析结果表明，在组内相关系数≥ 0. 8的情况下，有6个枝角类类群与湖泊特征和环境变量之间存在不同类型的相关性。典范对应分析（CCA）表明，海拔高度和其次是水电导率的枝角类物种组成的研究区域的最重要的驱动程序。此外，CCA分析表明，低透明度的低地湖泊也具有独特的物种组合特征。
Cladocera species composition was analyzed in surface sediments of 29 lakes in Central America (Guatemala, El Salvador and Honduras). The material studied was collected with an Ekman grab in autumn 2013 from lakes located in lowland, highland and mountain regions. The study revealed high variability in qualitative and quantitative composition of subfossil Cladocera. A total of 31 Cladocera species (5 planktonic and 26 littoral) were identified, as well as 4 morphotypes that could not be identified (NRR 1-4). Planktonic Bosminidae and Daphniidae were the most abundant families. Daphniidae were restricted to water bodies in mountain regions, whereas Bosminidae were widely distributed in lakes with different abiotic conditions. Moreover, Bosminidae species also occurred in highly mineralized waters (> 900 µS cm -1 ). The great majority of the identified Cladocera species belonged to the littoral family Chydoridae. Chydorus cf. sphaericus was the most common species (found in 20 lakes), which probably reflects its tolerance to a wide spectrum of habitat conditions. Cluster analysis discriminated 6 groups of Cladocera species with a high correlation level within groups (≥0.8), which showed different types of correlation with lake characteristics and environmental variables. Canonical correspondence analysis (CCA) showed that altitude and secondly water electrical conductivity were the most important drivers of Cladocera species composition in the region studied. Furthermore, CCA analysis indicated lowland lakes with low water transparency were also characterized by peculiar species assemblages.