- Title
- Environmental niche patterns of native and non-native fishes within an invaded African river system
- Creator
- Kadye, Wilbert T, Booth, Anthony J
- Date
- 2019
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/124407
- Identifier
- vital:35605
- Identifier
- https://doi.10.1111/jfb.13988
- Description
- To test ecological niche theory, this study investigated the spatial patterns and the environmental niches of native and non-native fishes within the invaded Great Fish River system, South Africa. For the native fishes, there were contrasting environmental niche breadths that varied from being small to being large and overlapped for most species, except minnows that were restricted to headwater tributaries. In addition, there was high niche overlap in habitat association among fishes with similar distribution. It was therefore inferred that habitat filtering-driven spatial organization was important in explaining native species distribution patterns. In comparison, most non-native fishes were found to have broad environmental niches and these fishes showed high tolerance to environmental conditions, which generally supported the niche opportunity hypothesis. The proliferation of multiple non-native fishes in the mainstem section suggest that they form a functional assemblage that is probably facilitated by the anthropogenic modification of flow regimes through inter-basin water transfer. Based on the distribution patterns observed in the study, it was inferred that there was a likelihood of negative interactions between native and nonnative fishes. Such effects are likely to be exacerbated by altered flow regime that was likely to have negative implications for native ichthyofauna.
- Format
- 9 pages, pdf
- Language
- English
- Relation
- Journal of Fish Biology, Kadye, W.T. and Booth, A.J., 2019. Environmental niche patterns of native and non-native fishes within an invaded African river system. Journal of fish biology, Journal of Fish Biology volume number 1 9 2019 0022-1112
- Rights
- Journal of Fish Biology
- Rights
- Use of this resource is governed by the terms and conditions of the Wiley Library Online Terms of Use Statement (https://onlinelibrary.wiley.com/terms-and-conditions)
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Kadye, Wilbert T (Dr)
Booth, Anthony John (Prof)
RU Department of Ichthyology and Fisheries Science
SDG 14. Life Below Water
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