Arif Jan, Guillermo Giannico, Ivan Arismendi, Rebecca Flitcroft
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Although we found more stability in the climatic niche for <i>O. mykiss</i> (93%) than <i>S. trutta</i> (58%), both species do not conserve their climatic niches in this region (<i>p</i> > 0.05). <i>S. trutta</i> has expanded more toward new environmental conditions (42%) compared to <i>O. mykiss</i> (7%). However, there are still available environmental gaps that <i>O. mykiss</i> and <i>S. trutta</i> can potentially occupy in the future. There was a higher overlap in climatic niches between <i>S. plagiostomus</i> and <i>O. mykiss</i> and between <i>S. richardsonii</i> and <i>S. trutta</i>. Observed shifts in climatic niches of these introduced species can negatively affect the transferability of distribution models, which may underestimate the assessments of habitat suitability for introduced trout in the Himalayas. Our study demonstrates that the information on climatic niche dynamics can inform the model-building process and improve the transferability and predictive performance to better assess vulnerability of sensitive habitats to introduced species in the Himalayas and elsewhere.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Unveiling climatic niches for deeper insights into invasion potential and enhanced distribution models of freshwater fishes\",\"authors\":\"Arif Jan, Guillermo Giannico, Ivan Arismendi, Rebecca Flitcroft\",\"doi\":\"10.1111/eff.12784\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Introduced species may exhibit variations in their preferred climatic niches between their native and introduced ranges, which can have important implications for the transferability of distribution models. In the Himalayan ecoregion, little is known about the geographic distribution and climatic niche overlap between native and introduced cold-water species. Here, we used the COUE (centroid shift, overlap, unfilling, and expansion) framework to explore the invasive potential of rainbow (<i>Oncorhynchus mykiss</i>) and brown (<i>Salmo trutta fario</i>) trout and corresponding climatic niche overlap with native snow trout (<i>Schizothorax plagiostomus</i> and <i>Schizothorax richardsonii</i>) in the Indus and Ganges River basins. Although we found more stability in the climatic niche for <i>O. mykiss</i> (93%) than <i>S. trutta</i> (58%), both species do not conserve their climatic niches in this region (<i>p</i> > 0.05). <i>S. trutta</i> has expanded more toward new environmental conditions (42%) compared to <i>O. mykiss</i> (7%). However, there are still available environmental gaps that <i>O. mykiss</i> and <i>S. trutta</i> can potentially occupy in the future. 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引用次数: 0
摘要
引进物种在其原生地和引进地之间可能会在其偏好的气候生态位方面表现出差异,这可能会对分布模型的可转移性产生重要影响。在喜马拉雅生态区,人们对原生和引入的冷水物种之间的地理分布和气候生态位重叠知之甚少。在此,我们利用 COUE(中心点移动、重叠、不填充和扩展)框架探讨了印度河和恒河流域虹鳟(Oncorhynchus mykiss)和褐鳟(Salmo trutta fario)的入侵潜力以及与本地雪鳟(Schizothorax plagiostomus 和 Schizothorax richardsonii)的相应气候生态位重叠。虽然我们发现 O. mykiss(93%)的气候生态位比 S. trutta(58%)更稳定,但这两个物种在该地区的气候生态位并不稳定(p > 0.05)。与 O. mykiss(7%)相比,S. trutta(42%)向新的环境条件扩展得更多。然而,O. mykiss 和 S. trutta 未来仍有可能占据一些环境空白。S.plagiostomus和O. mykiss之间以及S. richardsonii和S. trutta之间的气候生态位重叠程度较高。观察到的这些引入物种气候生态位的变化会对分布模型的可转移性产生负面影响,从而可能低估喜马拉雅山引入鳟鱼栖息地适宜性的评估。我们的研究表明,气候生态位动态信息可为模型建立过程提供信息,并提高可转移性和预测性能,从而更好地评估喜马拉雅山及其他地区敏感栖息地对引入物种的脆弱性。
Unveiling climatic niches for deeper insights into invasion potential and enhanced distribution models of freshwater fishes
Introduced species may exhibit variations in their preferred climatic niches between their native and introduced ranges, which can have important implications for the transferability of distribution models. In the Himalayan ecoregion, little is known about the geographic distribution and climatic niche overlap between native and introduced cold-water species. Here, we used the COUE (centroid shift, overlap, unfilling, and expansion) framework to explore the invasive potential of rainbow (Oncorhynchus mykiss) and brown (Salmo trutta fario) trout and corresponding climatic niche overlap with native snow trout (Schizothorax plagiostomus and Schizothorax richardsonii) in the Indus and Ganges River basins. Although we found more stability in the climatic niche for O. mykiss (93%) than S. trutta (58%), both species do not conserve their climatic niches in this region (p > 0.05). S. trutta has expanded more toward new environmental conditions (42%) compared to O. mykiss (7%). However, there are still available environmental gaps that O. mykiss and S. trutta can potentially occupy in the future. There was a higher overlap in climatic niches between S. plagiostomus and O. mykiss and between S. richardsonii and S. trutta. Observed shifts in climatic niches of these introduced species can negatively affect the transferability of distribution models, which may underestimate the assessments of habitat suitability for introduced trout in the Himalayas. Our study demonstrates that the information on climatic niche dynamics can inform the model-building process and improve the transferability and predictive performance to better assess vulnerability of sensitive habitats to introduced species in the Himalayas and elsewhere.
期刊介绍:
Ecology of Freshwater Fish publishes original contributions on all aspects of fish ecology in freshwater environments, including lakes, reservoirs, rivers, and streams. Manuscripts involving ecologically-oriented studies of behavior, conservation, development, genetics, life history, physiology, and host-parasite interactions are welcomed. Studies involving population ecology and community ecology are also of interest, as are evolutionary approaches including studies of population biology, evolutionary ecology, behavioral ecology, and historical ecology. Papers addressing the life stages of anadromous and catadromous species in estuaries and inshore coastal zones are considered if they contribute to the general understanding of freshwater fish ecology. Theoretical and modeling studies are suitable if they generate testable hypotheses, as are those with implications for fisheries. Manuscripts presenting analyses of published data are considered if they produce novel conclusions or syntheses. The journal publishes articles, fresh perspectives, and reviews and, occasionally, the proceedings of conferences and symposia.