Lack of congruence in species diversity indices and community structures of planktonic groups based on local environmental factors.
Lack of congruence in species diversity indices and community structures of planktonic groups based on local environmental factors.
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DOI：
10.1371/journal.pone.0069594
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Nakano S
中科院分区：
文献类型：
--
作者：
Doi H;Chang KH;Nishibe Y;Imai H;Nakano S
利用多种营养水平分析生物多样性和群落组成的决定因素的重要性已得到充分认识；然而，缺乏相关数据。在本研究中，我们调查了池塘生态系统中浮游动物、轮虫、纤毛虫和浮游植物等浮游生物分类类群的物种多样性指数和群落结构在一系列局部环境因素下的变化。对于每个浮游类群，我们用线性模型估计物种多样性指数，用典型对应分析来分析群落结构。结果表明，不同浮游类群的物种多样性指数和群落结构因当地环境因素的不同而不同。观察到的浮游类群之间缺乏一致性可能是由于具有相似营养协会的类群之间的生态位竞争或由于弱的营养相互作用造成的。我们的发现突显了基于单个分类群预测一个系统内的总生物多样性的难度。因此，为了保护生态系统的生物多样性，关键是要考虑不同分类类群在一系列当地条件下物种多样性指数和群落结构的差异。
The importance of analyzing the determinants of biodiversity and community composition by using multiple trophic levels is well recognized; however, relevant data are lacking. In the present study, we investigated variations in species diversity indices and community structures of the plankton taxonomic groups–zooplankton, rotifers, ciliates, and phytoplankton–under a range of local environmental factors in pond ecosystems. For each planktonic group, we estimated the species diversity index by using linear models and analyzed the community structure by using canonical correspondence analysis. We showed that the species diversity indices and community structures varied among the planktonic groups and according to local environmental factors. The observed lack of congruence among the planktonic groups may have been caused by niche competition between groups with similar trophic guilds or by weak trophic interactions. Our findings highlight the difficulty of predicting total biodiversity within a system, based upon a single taxonomic group. Thus, to conserve the biodiversity of an ecosystem, it is crucial to consider variations in species diversity indices and community structures of different taxonomic groups, under a range of local conditions.
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