Temporal dynamics of invertebrate community assembly in Lake Victoria since the late Pleistocene based on chitinous remains

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-03-06 DOI:10.1111/fwb.14237

Leighton King, Colin Courtney-Mustaphi, Maria Cuenca-Cambronero, Giulia Wienhues, Nare Ngoepe, Moritz Muschick, Yunuen Temoltzin-Loranca, Hendrik Vogel, Martin Grosjean, Willy Tinner, Andrew Cohen, Mary Kishe, Oliver Heiri, Ole Seehausen, Blake Matthews

引用次数: 0

Abstract

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基于壳质遗骸的维多利亚湖无脊椎动物群落自更新世晚期以来的时间动态变化

保存在湖泊沉积物中的无脊椎动物遗骸组合揭示了群落组成和环境条件的时间变化。然而，大型热带湖泊的记录却很少。维多利亚湖是最大的热带湖泊，其水位、生物地球化学和鱼类群落组成在过去约 17,000 卡年（BP）的历史中发生了动态变化。为了量化维多利亚湖无脊椎动物群从晚更新世到全新世的变化，我们研究了从公元前约 13,700 卡年至今的沉积物岩芯（水深 37 米）中鳞翅目（Cladocera）和双翅目（Chironomidae 和 Chaoboridae）幼虫的壳质残骸。我们发现，在这段湖泊历史中，无脊椎动物的组合经历了四个主要阶段。首先，摇蚊科（Chironomidae）和翘嘴蜓科（Chaoboridae）在晚更新世湖泊淹没的最初阶段以较低的丰度出现，当时桡足类（Cladocera）明显缺乏。其次，在全新世中期，摇蚊和摇蚊的丰度有所增加，这与全新世非洲湿润期末期硅藻的大量生产相吻合。第三，从公元前约 4,700 卡年开始，随着混合机制的变化，无脊椎动物群中出现了以沿岸纤毛虫为主的 Alona 属，并一直持续到全新世晚期至今。第四，Cydorus 和 Bosmina longirostris 的出现标志着在约 1,350 cal yr BP 建立了一个丰富的革囊动物群。随后，该集合体逐渐转向以 B. longirostris（一种浮游动物）为主。所观察到的无脊椎动物群的一些变化与东非气候条件和硅藻生产力的变化同时发生，而维多利亚湖以前曾有过这样的记录。维多利亚湖沉积无脊椎动物群落的这一多年期记录，阐明了这些群落在生态系统动态现代史的大部分时间里的一些发展情况。

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来源期刊

Freshwater Biology 生物-海洋与淡水生物学

CiteScore

5.90

自引率

3.70%

发文量

162

审稿时长

2 months

期刊介绍： Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.