Altered metapopulation dynamics in a headwater specialist in geomorphically dynamic catchments

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-07-04 DOI:10.1111/fwb.14299

Loren W. Stearman, Jacob F. Schaefer

引用次数: 0

Abstract

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地貌多变的集水区水源专家的种群动态变化

人类活动广泛破坏了对种群和生态系统完整性至关重要的空间生态过程。人们对河流沉积机制改变所造成的局部影响进行了深入探讨，但对其如何影响集水区范围内的连通性探讨较少。在本文中，我们记录了在具有地貌动态河流主干的集水区中，水源专家黑斑芒鲉（Fundulus olivaceus）的元种群动态发生改变的证据。我们通过对历史和近期航拍图像进行平面分析，量化了十年尺度的河流地貌活动模式，并通过逐基因型测序确定的单核苷酸多态性分析，量化了黑斑芒鲉的基因流动模式。干流变窄，蜿蜒度增加，可能是从历史洪水事件中恢复过来的。反应的巨大差异表明，不同的干扰历史和集水区对变化的敏感性造成了潜在的差异。多种分析方法都发现，地理因素是影响流域间遗传结构的主要因素。集水区内橄榄鱼的遗传分化和杂合度指标与多变量综合指标推断出的地貌变化程度有关。地貌变化越大的流域，种群结构化程度越高。五个种群被分配到相邻的集水区。对假定的供体、受体和错误分配的集水区的杂合度分析表明，受体集水区存在始祖效应，在当地物种灭绝后可能会出现异地再定居。我们的研究结果表明，在一种池居非嗜石的水源专家中，渠道演化对元种群动态产生了复杂的非局部影响。我们的综合研究方法有助于深入了解地貌过程对水生生态系统的影响。橄榄蛙在生态学上与传统上认为会对沉积物相关干扰做出反应的类群不同，它展示了更广泛的河道形态变化如何影响河床沉积以外的栖息地。

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.