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Variation in the impact of non-native seaweeds along gradients of habitat degradation: a meta-analysis and an experimental test

journal contribution
posted on 2015-09-01, 00:00 authored by L Tamburello, E Maggi, L Benedetti-Cecchi, G Bellistri, Alex RattrayAlex Rattray, C Ravaglioli, L Rindi, J Roberts, F Bulleri
Local anthropogenic stressors that severely alter biotic and abiotic conditions may underpin context-dependency in the impacts of biological invasions. We used a meta-analysis and an experimental test to examine the relationship between cumulative human impacts and ecological impact of non-native seaweeds on resident assemblages. Our results suggest that more negative impacts of on-native seaweeds on the abundance and biomass of resident assemblages can be expected in less degraded or pristine sites. Possibly, stronger impacts prevail at pristine sites, where assemblages are mainly structured by biotic interactions. Hence, management efforts should be mostly directed to prevent the establishment and spread of non-native seaweeds in pristine areas. On the other hand, weak, but positive effects of seaweeds at the most degraded sites add to the ongoing debate on the role of non-native species in rehabilitation plans.

History

Journal

Oikos

Volume

124

Issue

9

Pagination

1121 - 1131

Publisher

Wiley

Location

London, Eng.

ISSN

0030-1299

Language

eng

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2015, Wiley