BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Local environment and fragmentation by drought and damming shape different components of native and non-native fish beta diversity across pool refuges

Participants in the publication
Joana Martelo (Author)
Christos Gkenas (Author)
Dep. Biologia Animal
MARE
Diogo Ribeiro (Author)
M. Judite Alves (Author)
Filipe Ribeiro (Author)
Julien Cucherousset (Author)
João Gago (Author)
M. Filomena Magalhães (Author)

Summary
Pool refuges are critical for maintaining stream fish diversity in increasingly intermittent streams. Yet, the\npatterns and drivers of beta diversity of native and non-native fish in pool refuges remain poorly known.\nFocusing on Mediterranean streams, we decomposed beta diversity of native and non-native fish into richness\ndifference (RichDiff) and species replacement (Repl), and local (LCBD, LCBDRichDiff and LCBDRepl) and species\n(SCBD) contributions. We assessed the influence of environmental and spatial factors associated with drought\nand damming fragmentations on beta diversity components and LCBDs, and of local species richness and occupancy\non LCBDs and SCBD, respectively. Overall, non-native species showed a more limited occupancy of pool\nrefuges than native fish. RichDiff dominated beta diversity, though it was influenced by drought and damming\nfragmentations for native fish and local environment for non-native fish. Repl for native fish was slightly\ninfluenced by local environment, but for non-native fish was largely driven by drought and damming, albeit with\na contribution of local environment as well. LCBD and LCBDRichDiff increased in pools in low order streams for native fish and at low elevations for non-native fish, and with high or low species richness. SCBD was higher for\nnative species with intermediated pool occupancy, but for non-native species with low occupancy. Our results\nsuggest that stream fragmentation may drive native species loss and non-native species replacement in pool\nrefuges, and that environmental filtering may shape non-native species loss. Pools in lower order streams harbouring\nunique species-rich or species-poor assemblages should be prioritize for conservation and restoration,\nrespectively, and pools at low elevation with unique non-native assemblages should deserve control efforts. We\nencourage the partitioning of beta diversity and individual analysis of native and non-native fish in intermittent\nstreams, which may be key in stressing the importance of pool refuges in safeguarding native fish diversity.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Science of The Total Environment

Publication Identifiers
ISSN - 0048-9697

Publisher
Elsevier BV



Document Identifiers
DOI - https://doi.org/10.1016/j.scitotenv.2024.172517
URL - https://doi.org/10.1016/j.scitotenv.2024.172517

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