河岸网络中农业用地的增加对热带稀树草原的溪流鱼类群落产生负面影响

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Jenny J. Morales, Lúcia Mateus, Luiza Peluso, Peter Zeilhofer, Bruno R. S. Figueiredo, Jerry Penha
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引用次数: 0

摘要

几十年来,巴西塞拉多地区的土地利用发生了剧烈变化,其自然植被被大规模转化为农业和畜牧业。这些地貌变化因素也影响了该生物群落中的水生生态系统。在此,我们研究了不同尺度(集水区、河岸网络和局部河岸)的土地利用对巴西塞拉多溪流中鱼类组合的影响。我们假设,农业用地使用率(ALU%)的增加会降低鱼类的多样性和鱼群组成的独特性。我们使用 GLM 来评估低强度 ALU% 对鱼类丰富度和丰度的影响。此外,我们还利用贝塔回归分析了对贝塔多样性(LCBD)的影响,并利用冗余分析评估了对物种组成的影响。结果表明,低强度 ALU% 的影响取决于空间尺度。虽然增加河岸网络中的 ALU% 会对 LCBD 产生负面影响并改变物种组成,但在 ALU% 的范围内,集水区中的 ALU% 对 LCDB 的影响可以忽略不计,甚至略有正面影响。我们的研究结果强化了保护河岸林以维持巴西塞拉多溪流中贝塔多样性的必要性。此外,没有证据表明,在不破坏河岸林的情况下,低强度使用集水区会影响鱼类群落。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Increasing agricultural land use in riparian networks negatively affects stream fish communities in a tropical savanna

Increasing agricultural land use in riparian networks negatively affects stream fish communities in a tropical savanna

The Brazilian Cerrado has been experiencing intense land use changes for decades, with large-scale conversion of its natural vegetation to agriculture and livestock grazing. These agents of landscape change also affect the aquatic ecosystems embedded in the biome. Here, we investigated the effects of land use at different scales (catchment, riparian network, and local riparian) on fish assemblages in streams of the Brazilian Cerrado. We hypothesized that increasing agricultural land use (ALU%) reduces fish diversity and the compositional uniqueness of the fish assemblage. We used GLM to evaluate the impact of low-intensity ALU% on fish richness and abundance. Additionally, we employed beta regression to analyze the effect on local contribution to beta diversity (LCBD) and redundancy analysis to assess the impact on species composition. Our results showed that the effects of low-intensity ALU% depend on the spatial scale. While increasing ALU% in the riparian network negatively affected LCBD and altered species composition, ALU% in the catchment had negligible to slightly positive effects on LCDB, within the range of ALU% considered. Our findings reinforce the need to preserve riparian forests to maintain beta diversity in the streams of the Brazilian Cerrado. Also, no evidence was found that low-intense catchment use, without degrading the riparian forest, affects fish assemblages.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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