连接河漫滩系统中的水生多样性:环境、空间和扩散特征对大型无脊椎动物群落的作用

IF 1.8 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Florencia Lucila Zilli, Florencia Facelli Fernández
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引用次数: 0

摘要

自1970年以来,全球约83%的淡水物种已经减少,特别是在新热带地区,这突出表明迫切需要对这些生态系统进行保护。本研究探讨了影响阿根廷帕拉纳河中游地区大型无脊椎动物群落分类和功能多样性的因素,为研究河流生态系统相互作用的生物多样性提供了一个独特的机会。我们的研究考察了巴拉那河中部复杂的生态系统,其特征是主要水域、次级通道和湖泊之间的水文形态相互作用。我们分析了来自166个地点的数据,确定了160种底栖无脊椎动物。对空间和环境变量进行了评估,以表征生态条件(例如,斑块类型、栖息地连通性和形状、水文相、深度、粒度和电导率),并通过变异分区分析来理清它们对生物模式的影响。对群落的物种组成、分类和功能多样性进行了评价。无脊椎动物的分类多样性受空间因子和生态位因子的影响,取决于它们的分布模式。虽然纵向维度很重要,但更小尺度的变化,特别是横向变化,在群落多样性中起着至关重要的作用,这与洪水脉冲和流量脉冲理论相一致。功能多样性受中生境和微生境尺度的影响,而不是纵向的,这表明横向变异可能影响碎屑生物多样性。食物来源没有限制,允许营养动物在正常的水分水平下茁壮成长,具有高多样性和功能冗余。河流-河漫滩系统的异质性促进了物种的更替和高度共存,阻碍了物种的优势地位,有利于食腐动物,导致了高度的局部多样性和显著的功能冗余。这些发现表明,基于分散群的方法可以提高对群落模式的理解,并可用于河流生态系统的监测、保护和恢复策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Aquatic diversity in a connected floodplain system: the role of environmental, spatial, and dispersal traits on macroinvertebrate communities

Since 1970, approximately 83% of global freshwater species have declined, particularly in neotropical regions, highlighting the urgent need for conservation efforts in these ecosystems. This study investigates the factors shaping the taxonomic and functional diversity of macroinvertebrate communities in the Middle Paraná River, Argentina, a minimally regulated area, offering a unique opportunity to examine biodiversity alongside river ecosystem interactions. Our study examines the complex ecosystem of the Middle Paraná River, characterized by hydromorphological interactions between main waters, secondary channels, and lakes across its extensive floodplains. We analyzed data from 166 sites, identifying 160 species of benthic invertebrates. Spatial and environmental variables were assessed to characterize ecological conditions (e.g., patch type, habitat connectivity and shape, hydrometric phase, depth, granulometry, and conductivity) and to disentangle their influence on biotic patterns through variation partitioning analysis. The species composition, taxonomic, and functional beta diversity of the communities were assessed. The taxonomic diversity of invertebrates was influenced by spatial and niche-based factors, depending on their dispersal mode. While the longitudinal dimension was important, smaller-scale variations, especially lateral ones, played a crucial role in community diversity, aligning with flood pulse and flow pulse theories. Functional diversity was influenced by mesohabitat and microhabitat scales rather than along the longitudinal dimension, suggesting that lateral variability might impact detritivore diversity. Food sources were not restrictive, allowing detritivores to thrive during normal hydrometric levels, with high beta diversity and functional redundancy. The heterogeneity of the river-floodplain system boosted species turnover and high coexistence, preventing species dominance and benefiting detritivores, resulting in high local diversity and significant functional redundancy. These findings suggest that a dispersal group-based approach improves the understanding of community patterns and can be useful for monitoring, conservation, and restoration strategies in riverine ecosystems.

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来源期刊
Aquatic Sciences
Aquatic Sciences 环境科学-海洋与淡水生物学
CiteScore
3.90
自引率
4.20%
发文量
60
审稿时长
1 months
期刊介绍: Aquatic Sciences – Research Across Boundaries publishes original research, overviews, and reviews dealing with aquatic systems (both freshwater and marine systems) and their boundaries, including the impact of human activities on these systems. The coverage ranges from molecular-level mechanistic studies to investigations at the whole ecosystem scale. Aquatic Sciences publishes articles presenting research across disciplinary and environmental boundaries, including studies examining interactions among geological, microbial, biological, chemical, physical, hydrological, and societal processes, as well as studies assessing land-water, air-water, benthic-pelagic, river-ocean, lentic-lotic, and groundwater-surface water interactions.
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