赞比西河洪泛平原生态区入侵螯虾表型的复杂选择过程

IF 2.8 2区 生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-07-12 DOI:10.1111/fwb.14308
Nawa Nawa, Josie South, Bruce R. Ellender, Josephine Pegg, Takudzwa C. Madzivanzira, Ryan J. Wasserman
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引用次数: 0

摘要

了解驱动非本地物种表型变异的生态进化过程对于预测影响和建立空间明确的管理模式至关重要。入侵的红爪螯虾 Cherax quadricarinatus 正在非洲中南部具有重要生态和经济价值的赞比西河中上游水系迅速蔓延。我们测试了巴罗泽洪泛平原是否存在入侵前沿效应,并沿着季节性水文时期 200 千米的非线性入侵梯度,区分了这些效应是否与环境过滤、空间排序或密度依赖过程有关。小龙虾在上游和下游的传播表明,与2019年的前入侵前线相比,小龙虾种群数量在不断扩大,这是由两性共同促成的。雨季的发现概率和相对丰度均低于旱季。由于湿季栖息地的高度连通性,未发现环境过滤信号。入侵前沿种群的特点是相对丰度较低、身体状况较差、总体身体和螯的尺寸较大以及前腿长度较长。性别比例没有影响。这表明,在入侵梯度上,空间分选、密度依赖过程和捕食压力对表型变异起着选择性作用。我们迫切需要更好地了解洪水机制和营养相互作用对表型变异和扩散的影响。抑制种群以减少空间分类和同种竞争可能是入侵前沿的一种可行的管理方案。
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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Complex selection processes on invasive crayfish phenotype at the invasion front of the Zambezi floodplains ecoregion

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来源期刊
Freshwater Biology
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.
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