入侵胭脂鱼对中国淡水原生鲮鱼造成的密度依赖性营养后果

IF 2.8 2区 生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-05-24 DOI:10.1111/fwb.14262
Yingqiu Zhang, Jie Li, Fangcan Chen, Yuefei Li, Shouhui Dai, J. Robert Britton
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引用次数: 0

摘要

了解入侵鱼类对功能相似的本地鱼类的营养影响的强度、方向和后果,对于入侵影响评估和为管理计划提供信息非常重要。由于功能相似的本地鱼类和外来鱼类可以共享猎物资源,因此很有可能发生竞争性相互作用,从而影响营养生态位的大小和位置。高度外来入侵的胭脂鱼和本地鲮鱼目前在中国南方的许多淡水中共存,这引起了人们对鲮鱼后果的关注。在一个池塘围养实验中,使用同域和异域鱼类进行了相加和相替处理,测试了这两种鱼类的营养相互作用及其后果(生长率和营养生态位大小作为同位素生态位,用δ13C和δ15N计算),并将结果与入侵的野生群落进行了比较。在实验中,随着处理中鱼类数量的增加,特定生长率明显下降。在两种鱼类中都观察到了这些密度效应,而且与处理是同域还是共域无关。在同域处理中,鲮鱼的同位素壁龛随着鱼群数量的增加而增大。相反,在同域处理中,鲮鱼的同位素生态位大小随着胭脂鱼数量的增加而减小。在同域实验处理中,鲮鱼和胭脂鱼的同位素生态位始终存在差异。实验和野外数据表明,虽然本地鲮鱼可能会受到胭脂鱼的影响,但这些影响可能只有在物种数量非常多、种间竞争相互作用非常激烈时才会显现。这些结果还表明,这两个物种都有减少其种间相互作用的机制,以尽量减少其竞争性相互作用,因此,胭脂鱼对生态的影响可能更多来自间接过程,而非直接过程。
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Density-dependent trophic consequences of invasive mrigal carp on native mud carp in Chinese fresh waters

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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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