• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Hydrobiologia >Local and regional effects structuring aquatic insect assemblages at multiple spatial scales in a Mainland-Island region of the Atlantic Forest
【24h】

Local and regional effects structuring aquatic insect assemblages at multiple spatial scales in a Mainland-Island region of the Atlantic Forest

机译：在大西洋森林大陆岛地区的多个空间鳞片下构建水上昆虫组合的地方和区域效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Species diversity can be a result of environmental and spatial constrains that act at small and large spatial scales. An important question in community ecology is to know the contribution of each one in studies with multiple spatial scales. We examined aquatic insect assemblages in small streams from the Atlantic Forest in a mainland-island scenario, with the aim of measuring which variables explain the beta-diversity of insects at three spatial scales (streams, ecoregions, mainland-island). We sampled 20 streams across four ecoregions, two on the mainland and two on the island. Spatial distribution of streams was hierarchical and ecoregions were isolated. The beta-diversity decreased with increasing spatial scale, where higher values were found among streams and not among ecoregions or mainland-island. Our results indicate that the contribution of environmental and spatial predictors to the beta-diversity of aquatic insect varies according to the scale of observation. Environmental variables of water and riparian forest had a greater effect on beta-diversity among stream sites, while spatial and landscape (physical barriers) variables seem to be key factors at larger scales (ecoregions and mainland-island, respectively), which can prevent dispersal. Our study shows that local environmental heterogeneity had a great importance for maintaining regional diversity of aquatic insects.
机译：物种多样性可能是在小型和大空间尺度上行动的环境和空间约束的结果。社区生态学中的一个重要问题是要了解每一个在多个空间尺度的研究中的贡献。我们在大陆岛屿情景中的大西洋森林中检查了大型溪流的水生昆虫组合，目的是在三个空间尺度（流，eCoregions，大陆岛）中衡量哪些变量解释昆虫的β多样性。我们在四个eCoregions上抽出了20个溪流，在大陆和岛上的两个河上。流的空间分布是分层的分层，均分离生态。 β-多样性随着空间尺度的增加而降低，其中溪流之间存在较高的值，而不是eCoregions或大陆岛。我们的结果表明，环境和空间预测因子对水生昆虫的β多样性的贡献根据观察规模而变化。水和河岸森林的环境变量对溪流场所的β多样性产生了更大的影响，而空间和景观（物理障碍）变量似乎是较大尺度（分别的凸起和大陆 - 岛屿）的关键因素，这可以防止分散。我们的研究表明，当地环境异质性对维持水生昆虫的区域多样性具有重要意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号