Naslov
A global assessment of freshwater fish introductions in mediterranean-climate regions

Autori
Marr, Sean M. ; Olden, Julian D. ; Leprieur, Fabien ; Arismendi, Ivan ; Ćaleta, Marko ; Morgan, David L. ; Nocita, Annamaria ; Šanda Radek ; Tarkan, Ali Serhan ; García-Berthou, Emili

Izvornik
Hydrobiologia (0018-8158) 719 (2013); 317-329

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
introduced species; non-native species; conservation biogeography; taxonomic homogenization; functional homogenization

Sažetak
Mediterranean-climate regions (med-regions) are global hotspots of endemism facing mounting environmental threats associated with human-related activities, such as the ecological impacts from non-native species. This study provides a global assessment of freshwater fish introductions across med-regions and evaluates the consequences of non-native fishes for shaping the geography of taxonomic and functional diversity. We found that 136 freshwater fish species, from 26 families in 13 orders, have been introduced into med-regions globally. Human-mediated fish introductions and extirpations have increased taxonomic and functional similarity among regions by an average of 7.5% (range: 4.6-11.4%) and 7.2% (range: 1.4-14.0%), respectively. Faunal homogenization was highest in Chile and the western Mediterranean Sea Basin, caused primarily by the widespread introduction of Gambusia holbrooki, Cyprinus carpio, Oncorhynchus mykiss, Carassius auratus, Micropterus salmoides and Lepomis spp., whereas south-western Cape and the Aegean Sea drainages showed slight differentiation over time. Currently, fish faunas of different med-regions have more widespread species in common that are typically large-bodied, non-migratory, higher physiological tolerance, and display fast population doubling times. Our findings suggest that the long-history of intentional and accidental fish introductions in these freshwater ecosystems has dissolved dispersal barriers to movement and significantly changed the present-day biogeography of med-regions across the globe.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

Napomena
S.I.: Streams in mediterranean climate regions : lessons learned from the last decade.

POVEZANOST RADA