Scholarlink

<p>Drainage basins in semi-humid regions are pivotal for studying aquatic metacommunity patterns and their ecological drivers. This study examined macroinvertebrates across three hydrological periods (dry: April 2023; wet: July 2023; normal: October 2023), in the Shichuan River basin and Luo River basin, key rivers in a semi-humid region. PERMANOVA demonstrated significant differences in macroinvertebrate communities across distinct hydrological periods and the two basins. Macroinvertebrate species richness and diversity were highest during the dry season. Ecosystem attributes, based on functional feeding groups, displayed temporal variations, with higher material cycling capacity in the dry season and greater longitudinal/lateral material transport in the wet season. Top-down effects were stronger in dry and wet seasons, while habitat stability was higher in wet and normal seasons. Macroinvertebrate community datasets across different hydrological periods best aligned with the Quasi-Clementsian metacommunity pattern. Beta diversity partitioning and EMS analysis indicated that the primary component of macroinvertebrate community differences in the semi-humid region is species turnover, with community assembly dominated by the replacement of distinct species groups. Environmental filtering and spatial processes played significant roles. These findings enhance our understanding of the temporal dynamics of macroinvertebrate communities and the relative importance of various ecological drivers in semi-humid drainage basins.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hydrological variability shapes macroinvertebrate metacommunity structure and dynamics in semi-humid drainage basins

  • 期刊论文

  • 发表日期：

    2026年5月18日

查看全文
  • Mingjie Li,
  • Yongjiu Cai,
  • Mengyu Sun,
  • Jiahao Wei,
  • Zhijun Gong,
  • Kuanyi Li,
  • You Zhang

摘要

Drainage basins in semi-humid regions are pivotal for studying aquatic metacommunity patterns and their ecological drivers. This study examined macroinvertebrates across three hydrological periods (dry: April 2023; wet: July 2023; normal: October 2023), in the Shichuan River basin and Luo River basin, key rivers in a semi-humid region. PERMANOVA demonstrated significant differences in macroinvertebrate communities across distinct hydrological periods and the two basins. Macroinvertebrate species richness and diversity were highest during the dry season. Ecosystem attributes, based on functional feeding groups, displayed temporal variations, with higher material cycling capacity in the dry season and greater longitudinal/lateral material transport in the wet season. Top-down effects were stronger in dry and wet seasons, while habitat stability was higher in wet and normal seasons. Macroinvertebrate community datasets across different hydrological periods best aligned with the Quasi-Clementsian metacommunity pattern. Beta diversity partitioning and EMS analysis indicated that the primary component of macroinvertebrate community differences in the semi-humid region is species turnover, with community assembly dominated by the replacement of distinct species groups. Environmental filtering and spatial processes played significant roles. These findings enhance our understanding of the temporal dynamics of macroinvertebrate communities and the relative importance of various ecological drivers in semi-humid drainage basins.