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Predicting how climate change and globally invasive piscivorous fishes will interact to threaten populations of endemic fishes in a freshwater biodiversity hotspot

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Date

2023

Author

Emiroğlu, Özgür
Aksu, Sadi
Başkurt, Sercan
Britton, J. Robert
Tarkan, Ali Serhan

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Citation

Emiroğlu, Ö., S. Aksu, S. Başkurt, J. R. Britton, and A. S. Tarkan. 2023. "Predicting how Climate Change and Globally Invasive Piscivorous Fishes Will Interact to Threaten Populations of Endemic Fishes in a Freshwater Biodiversity Hotspot." Biological Invasions. doi:10.1007/s10530-023-03016-4.

Abstract

Freshwater ecosystems are highly vulnerable to the detrimental impacts of both biological invasions and climate change. Piscivorous alien fishes drive populations of small-bodied native fishes to extinction and warming is already driving extreme temperature events in lakes and rivers globally. Here, we use Ecological Niche Modelling (ENM) to predict how climate change will alter the geographical space of six alien fishes and five native fish genera (which include multiple endemic species) in Turkey, a hotspot of freshwater fish diversity. The models predicted that the geographical space of the alien fishes already present in Turkey would generally increase (including pikeperch Sander lucioperca and perch Perca fluviatilis), but with the most substantial increases in largemouth bass Micropterus salmoides, a species not yet present in Turkey but that is invasive in countries nearby and is highly popular for sport angling. For the native fish genera, general predictions were for reduced geographical space, especially in the south and east of the country, suggesting the endemic species will become increasingly imperilled in future. Their populations will also be at increasing risk of deleterious impacts from the alien piscivores, as the predictions were also for increasing overlaps in the geographical space of both the alien fishes and native fish genera. These predictions suggest that the conservation of these endemic species need to consider measures on preventing both the introduction of alien species (e.g. largemouth bass) and the further dispersal of extant alien species (e.g. pikeperch), as well as habitat interventions that will limit the effects of climate change on their populations. These results also indicate that the combination of climate change and alien invasions could have substantial impacts on—and similar—hotspots of freshwater diversity.

Source

Biological Invasions

URI

https://doi.org/10.1007/s10530-023-03016-4
https://hdl.handle.net/20.500.12809/10573

Collections

  • Scopus İndeksli Yayınlar Koleksiyonu [6219]
  • Su Ürünleri Temel Bilimleri Bölümü Koleksiyonu [168]



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