Among-taxon congruence in biodiversity patterns: can stream insect diversity be predicted using single taxonomic groups?
Among-taxon congruence in biodiversity patterns: can stream insect diversity be predicted using single taxonomic groups?
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DOI：
10.1139/f03-081
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发表时间：
2003-09-01
影响因子：
2.4
通讯作者：
Paasivirta, L
中科院分区：
文献类型：
--
作者：
Heino, J;Muotka, T;Paasivirta, L
近年来，单一分类类群作为其他分类类群生物多样性变化指标的应用越来越受到重视，但对溪流生物的研究还很缺乏。研究了芬兰110条水源河流中蜉蝣、石蝇、球蝇和摇蚊的多样性格局。具体来说，我们研究了物种丰富度和组合组成是否在不同的环境梯度中表现出相似的变化，以及单个分类单元是否可以作为其他分类单元多样性的预测因子。不同分类群的物种丰富度和组成与环境梯度的关系略有不同，一致性较低。五月蝇和摇蝇的多样性与河流酸度和水颜色的关系最为密切，而石蝇和球蝇的多样性与地理位置和当地环境变量的关系更为复杂。Mantel检验结果表明，总体组合组成在分类群间具有显著的一致性。然而，即使这些相关性仍然相当低，从而限制了它们保护目的的潜力。总的来说，我们的结果不支持使用单一分类类群作为源流生态系统昆虫多样性的指标。因此，在未来的研究中应研究其他的生物多样性评估方法（如形态种、高分类单元丰富度和环境多样性）。
The utility of single taxonomic groups as indicators of biodiversity variation in other taxa has recently gained increasing attention, but such studies on stream organisms are lacking. We studied the diversity patterns of mayflies, stoneflies, caddisflies, and chironomid midges across 110 headwater streams in Finland. Specifically, we examined if species richness and assemblage composition showed similar variation among the taxonomic groups across environmental gradients and if a single taxon could be used as a predictor of diversity in the other groups. Species richness and composition in different taxa exhibited slightly different relationships to environmental gradients, leading to low degrees of concordance. The diversity of mayflies and chironomids showed strongest relationships with stream acidity and water colour, whereas stoneflies and caddisflies exhibited more complex correlations with geographical location and local environmental variables. The overall assemblage composition, however, exhibited significant among-taxon congruence, as shown by Mantel tests. However, even these correlations remained rather low, thus limiting their potential for conservation purposes. Overall, our results do not support the use of single taxonomic groups as indicators of insect biodiversity in headwater stream ecosystems. Alternative approaches for lotic biodiversity assessment (e.g., morphospecies, higher-taxon richness, and environmental diversity) should thus be examined in future studies.