水生食物网中普通入侵者的生态影响受环境背景的影响

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-05-03 DOI:10.1111/fwb.14256

Cristina Charette, Alison M. Derry

引用次数: 0

摘要

淡水生态系统受到入侵物种的威胁。通性入侵者经常与本地物种争夺共享资源，从而可能导致本地物种的生态位被取代。然而，环境异质性可能会调节入侵物种的个体特化水平，从而改变入侵物种与本地物种之间种间竞争的结果。我们的研究目的是：（1）根据环境匹配假说（EMH）评估入侵物种膳食特化和营养位置的环境背景；（2）考虑入侵物种膳食资源利用的环境背景如何影响竞争类似资源的本地物种的膳食生态位。我们利用肠道内容物和稳定同位素分析，确定了入侵的圆鰕虎鱼（Negobius melanostomus）和本地黄鲈（Perca flavescens）在一个被入侵的河流生态系统中的环境梯度上的资源利用、营养位置和食物生态位。我们的研究结果表明，入侵者的饮食和资源专一性支持EMH，但营养位置不支持EMH。在高水导率的环境条件下，虾虎鱼是以浮游猎物为主要食物的通食性动物。在更具挑战性的低水导环境条件下，入侵者专门捕食优质底栖猎物。在水导率低的地点，大眼鰕虎鱼的生态影响最大，因为入侵者是底栖动物专家；入侵者与本地物种之间存在更大的相对食物生态位重叠。我们的研究独特地说明了入侵物种的资源专一性如何受到生态系统内空间环境异质性的调节，以及这如何改变入侵者对水生食物网中本地物种的生态影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ecological impact of a generalist invader in the aquatic food web is mediated by environmental context

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Ecological impact of a generalist invader in the aquatic food web is mediated by environmental context

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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.