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Non-flying and flying macroinvertebrates show similar beta diversity patterns caused by different factors at two spatial scales in Amazon streams
Aquatic Sciences ( IF 2.4 ) Pub Date : 2021-07-08 , DOI: 10.1007/s00027-021-00816-5
Alexandre Sampaio de Siqueira 1 , Raphael Ligeiro 1 , Solana Meneghel Boschilia 2 , Cleverson Rannieri Meira dos Santos 3 , Jani Heino 4
Affiliation  

We evaluated the beta diversity patterns of aquatic macroinvertebrate assemblages at two spatial scales in streams in the Eastern Amazon, as well as tested whether environmental and spatial factors affected these assemblage patterns differently for non-flying (i.e., shrimps) and flying (i.e., insects) macroinvertebrate groups. Fifteen streams were sampled, focusing on two hierarchical spatial levels: sampling units (length: five meters) and stream sites (length: 150 m). We additively partitioned gamma diversity to test the relative importance of each spatial level to regional diversity. The total beta diversity at each spatial level was decomposed into the components of replacement and abundance difference. To test whether there was an effect of spatial distances and environmental variables on the dissimilarity matrices, we used multiple regression on distance matrices (MRM). Our results showed that: (1) In both macroinvertebrate groups, alpha diversity contributed less than beta diversity, and dissimilarity between stream sites presented a greater contribution to gamma diversity; (2) the decomposition of beta diversity showed similar patterns in both groups and between the two spatial levels, with a greater contribution of abundance difference than replacement; and (3) the MRM models showed that only environmental distance was important to explain beta diversity of insects, while for shrimps both environmental and spatial distances were significant. We conclude that different ecological processes and environmental variables were important to explain the distributions of insects and shrimps, which is probably related to the different dispersal modes and environmental niche requirements.



中文翻译:

非飞行和飞行的大型无脊椎动物在亚马逊河流中的两个空间尺度上显示出由不同因素引起的相似的贝塔多样性模式

我们评估了亚马逊东部河流中两个空间尺度的水生大型无脊椎动物组合的 β 多样性模式,并测试了环境和空间因素是否对非飞行(即虾)和飞行(即昆虫)的这些组合模式产生了不同的影响。 ) 大型无脊椎动物群。对 15 条河流进行了采样,重点关注两个分层空间级别:采样单元(长度:5 米)和河流站点(长度:150 m)。我们对伽马多样性进行了附加分区,以测试每个空间级别对区域多样性的相对重要性。每个空间水平的总β多样性被分解为置换和丰度差异的组成部分。为了测试空间距离和环境变量是否对相异矩阵有影响,我们对距离矩阵 (MRM) 使用了多元回归。我们的研究结果表明:(1)在两个大型无脊椎动物群体中,α多样性的贡献小于β多样性,河流站点之间的差异对γ多样性的贡献更大;(2) β多样性的分解在两组和两个空间水平之间表现出相似的模式,丰度差异的贡献大于替代;(3) MRM 模型表明只有环境距离对解释昆虫的β多样性很重要,而对虾来说,环境和空间距离都很重要。我们得出结论,不同的生态过程和环境变量对于解释昆虫和虾的分布很重要,

更新日期:2021-07-08
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