内陆湿地鱼类遗传结构与历史人口统计学研究——以濒危的里斯本弓口鼻为例。

IF 3.9 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Giulia Riccioni, Manuel Curto, Carlos D Santos, Maria Judite Alves, Hugo F Gante, Filipe Ribeiro, Ana Veríssimo
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引用次数: 0

摘要

内陆湿地是高度多样化的生产性生态系统,处于陆地和水生环境之间的过渡阶段,为社会提供重要服务。它们也承受着巨大的人类压力,在全球范围内总面积逐渐减少。在此,我们描述了在极端栖息地变化的背景下,发生在欧洲西南部一条主要河流内陆湿地的濒危里斯本弓口病伊比罗软骨瘤的遗传多样性和人口统计学。我们的研究结果强调了结构良好的小种群核的存在,以及在历史和当代时间尺度上零星基因流动的证据。历史重建表明,种群隔离与不适宜的栖息地条件切断种群连通性的时期相一致,而种群规模小可能是由于可用栖息地有限,加上历史上以及最近河流支流之间的连通性受到限制。气候变化导致的降雨减少对内陆湿地鱼类栖息地的萎缩或丧失将对其产生区域性影响,从而引起对低遗传多样性和小有效种群规模的内陆湿地鱼类的额外保护关注。该研究可作为类似内陆湿地生态系统中类群发生的代理,并可为保护工作和规划提供有关人口统计、分布和连通性的预期驱动因素的信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Genetic structure and historical demography of inland wetland fish using the endangered Lisbon arched-mouth nase as a case-study.

Inland wetlands are highly diverse, productive ecosystems at the transition between terrestrial and aquatic environments, providing major services to society. They are also under high human pressure and have suffered a progressive decline in total area globally. Here, we describe the genetic diversity and demography of the endangered Lisbon arched-mouth nase Iberochondrostoma olisiponense occurring in the inland wetlands of a major river in southwestern Europe, within a context of extreme habitat changes. Our results highlight the presence of well-structured small population nuclei with evidence of sporadic gene flow at historical and contemporary time scales. Historical reconstructions suggest population isolation consistent with periods of unsuitable habitat conditions severing population connectivity, while small population sizes may be due to limited available habitat coupled to historical as well as recent restricted connectivity among river tributaries. Habitat contraction or loss due to decreased rainfall associated with climate change is expected to impact inland wetland fish regionally, raising additional conservation concerns on species with low genetic diversity and small effective population sizes as I. olisiponense. This study may serve as a proxy for taxa occurring in similar inland wetland ecosystems and may inform conservation efforts and planning regarding the expected drivers of population demographics, distribution and connectivity.

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来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
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