热带非常年溪流中的鱼类和大型无脊椎动物对季节性干燥的不同反应

IF 1.6 4区 环境科学与生态学 Q3 ECOLOGY
Austral Ecology Pub Date : 2024-07-10 DOI:10.1111/aec.13558
Júlia Silva Oliveira, Robert M. Hughes, Bianca de F. Terra
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引用次数: 0

摘要

地表水干涸对非多年生溪流和河流中地段生物群落的持久性构成挑战。然而,自然水文干扰对生物群落的影响取决于个体物种的特征。在这项研究中,我们调查了非多年生溪流(流动池与断流池)中鱼类和大型无脊椎动物群落在两个阶段的结构和关联。我们在卡廷加(巴西半干旱地区)的五条非多年生溪流中采集了鱼类和大型无脊椎动物的样本。鱼类物种对溪流的水文动态具有抵抗力。另一方面,水流阶段的一些大型无脊椎动物类群消失了,而新的类群则在断开的水池中定居下来。水流停止后,大量昆虫消失,借水性类群在断开的水池中定居,这有利于这些动态溪流中大型无脊椎动物群落的持续存在。我们的研究表明,鱼类和大型无脊椎动物群对同一自然断流的反应不同,这使我们预测,根据分类群的不同,水流变化将产生不同的群落。因此,要有效管理和保护热带半干旱地区的非多年生溪流生态系统,就必须考虑多类群的反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fish and macroinvertebrates respond differently to seasonal drying in tropical non-perennial streams

Surface water drying challenges the persistence of lotic biological assemblages in non-perennial streams and rivers. However, the effects of natural hydrological disturbances on an assemblage depend on individual species characteristics. In this study, we investigated the structure and association of fish and macroinvertebrate assemblages during two phases in non-perennial streams (flowing vs. disconnected pools). We sampled fish and macroinvertebrate assemblages in five non-perennial stream reaches located in the Caatinga (Brazilian semi-arid region). Fish species were resistant to hydrological dynamics in the streams. On the other hand, some macroinvertebrate taxa from the flowing phase disappeared, and new taxa colonized the disconnected pools. The absence of lotic insects following flow cessation and the colonization of disconnected pools by lentic taxa facilitated macroinvertebrate assemblages persistence in these dynamic streams. Our study showed that fish and macroinvertebrate assemblages respond differently to the same natural flow cessation, which leads us to predict that flow changes will yield different assemblages, depending on the taxa. Thus, it is crucial to consider multi-assemblage responses to effectively manage and conserve non-perennial stream ecosystems in a tropical semi-arid region.

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来源期刊
Austral Ecology
Austral Ecology 环境科学-生态学
CiteScore
2.90
自引率
6.70%
发文量
117
审稿时长
12-24 weeks
期刊介绍: Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere. Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region. Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.
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