Metalimnion as an ecotone in stratified freshwater lakes: A case study on benthic testate amoebae in Lake Valdayskoe

IF 2.8 2区生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-03-26 DOI:10.1111/fwb.14243

Vlad V. Sysoev, Dmitry G. Seleznev, Fedor Y. Reshetnikov, Viktor V. Zakonnov, Denis V. Tikhonenkov

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金属膜是分层淡水湖的生态区：瓦尔达斯科湖底栖睾丸变形虫案例研究

睾丸变形虫在现代生态环境研究中被广泛用作生物指标，在湖泊环境的古生态重建中被用作代用指标。分层水体中的金属膜与温跃层会对许多水生动物的物种结构产生强烈影响，并经常扮演浮游动物生态区的角色，但我们对金属膜对底栖生物，尤其是睾丸变形虫的影响的了解仍然有限。本研究旨在描述瓦尔代斯科湖分层淡水中金属膜及其温跃层沿温度梯度对底栖类睾丸变形虫组合的影响。我们从 9 个地点采集了 28 个样本，这些样本沿横断面从沿岸带开始，经过较长的金属盐层及其温跃层，最后到达底坡的下盐层。我们在横断面上确定了 4 个物种组合、6 个非归属样本和 5 个形态特征组合，其中包括金属浸没带内的相应区域。我们观察到底栖生物的物种组合、形态组成以及物种和形态结构从浅水到深水的转变具有相似性，其中有两个转变与金属潮间带的上下限界限十分吻合。综合观察到的生物和水文特征表明，金属膜层在分层淡水湖泊中扮演着浅水和深水生态区的角色，并维持着底栖睾丸变形虫群落的完整性和可持续性。我们探索了一种多元方法，证明高丰度物种和优势形态的组合可能是相关环境条件的有效指标。因此，Cylindrifflugia acuminata、Centropyxis aculeata、Difflugia lacustris、D. linearis 和 C. discoides 的高丰度与长尖头壳和扁平尖头壳的优势相结合，与被许多大型植物覆盖的沙质沉积物的沿岸带密切相关。D.petricola和D.penardi的高丰度以及梨形、有颈和椭圆形贝壳的优势与深海密切相关。从沿岸水域到深海水域的物种和形态过渡研究提供了更多关于睾丸动物形态适应性的信息，以及关于沿深度梯度形成和维持底栖睾丸变形虫群的过程的信息。所描述的与特定水深相关的物种和形态组合可能有助于古重建。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.