临时池塘中无脊椎动物休眠期的孵化动态受多种水化作用的影响

IF 1.7 4区 环境科学与生态学 Q3 ECOLOGY
Freshwater Science Pub Date : 2022-01-24 DOI:10.1086/719129
D. Vendramin, M. M. Pires, R. F. Freiry, A. Schneider, Lidiane Martins, E. S. Medeiros, O. Rocha, C. Stenert, L. Maltchik
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引用次数: 2

摘要

水生无脊椎动物的休眠终止取决于多种环境线索,尤其是水合作用,以及无脊椎动物对每一次新的洪水事件的反应能力。休眠期的孵化对间歇湿地的生态过程很重要,例如干旱期后生物群的重新定居和食物网动态的维持。然而,无脊椎动物对水合线索的孵化反应可能表现出相当大的空间和分类学变化,这种变化对孵化组合结构的影响尚不清楚。在这项研究中,我们测试了多次连续补水如何影响从临时池塘沉积物中孵化的无脊椎动物的孵化动力学和组合结构。我们假设分类群对洪水的不同反应会影响孵化的组合结构。我们预测,孵化物的丰富度在水合事件中几乎没有变化,但孵化物的组成在水合事件之间会有所不同。我们进行了一项非原位孵化实验,将巴西南部沿海平原12个临时池塘的沉积物暴露在一系列3个水合事件中,并诱导无脊椎动物从沉积物中的休眠阶段孵化。孵化成分不同,但丰富度不同。此外,孵化后的幼崽组成在每次水合作用中都表现出显著的短期变化。我们发现,亚热带临时池塘中水生无脊椎动物的休眠动态受到多种水合线索的影响。我们的研究结果对生物多样性评估和临时池塘的管理以及了解不断变化的水文状况对间歇性洪水生态系统生态过程的影响具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hatching dynamics of invertebrate dormant stages in temporary ponds are influenced by multiple hydrations
Dormancy termination in aquatic invertebrates depends on multiple environmental cues, notably hydration, and on the invertebrates’ ability to respond to each new flooding event. Hatching of dormant stages is important to ecological processes in intermittent wetlands, such as recolonization of biota after dry periods and maintenance of foodweb dynamics. However, hatching responses of invertebrates to hydration cues can show considerable spatial and taxonomic variation, and consequences of this variation to the hatchling assemblage structure are still unclear. In this study, we tested how multiple hydrations in series affect hatching dynamics and assemblage structure of invertebrate fauna that hatch from sediments of temporary ponds. We hypothesized that variable responses to flooding among taxa would influence the hatchling assemblage structure. We predicted that hatchling richness would show little or no variation across hydration events but that hatchling composition would vary among hydration events. We performed an ex-situ hatching experiment to expose the sediments of 12 temporary ponds in the southern Brazilian Coastal Plain to a sequence of 3 hydration events and to induce hatching of invertebrates from dormant stages in the sediments. Hatchling composition, but not richness, differed among the 3 hydration events. Additionally, hatchling composition showed marked short-term variation within each hydration event. We showed that dormancy dynamics of aquatic invertebrates in subtropical temporary ponds are influenced by multiple hydration cues. Our results have important implications for biodiversity assessment and management of temporary ponds and for understanding the effects of changing hydrologic regimes on the ecological processes of intermittently flooded ecosystems.
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来源期刊
Freshwater Science
Freshwater Science ECOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
4.10
自引率
0.00%
发文量
49
审稿时长
6-12 weeks
期刊介绍: Freshwater Science (FWS) publishes articles that advance understanding and environmental stewardship of all types of inland aquatic ecosystems (lakes, rivers, streams, reservoirs, subterranean, and estuaries) and ecosystems at the interface between aquatic and terrestrial habitats (wetlands, riparian areas, and floodplains). The journal regularly features papers on a wide range of topics, including physical, chemical, and biological properties of lentic and lotic habitats; ecosystem processes; structure and dynamics of populations, communities, and ecosystems; ecology, systematics, and genetics of freshwater organisms, from bacteria to vertebrates; linkages between freshwater and other ecosystems and between freshwater ecology and other aquatic sciences; bioassessment, conservation, and restoration; environmental management; and new or novel methods for basic or applied research.
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