Competitive interactions between co-occurring invaders: Identifying asymmetries between two invasive crayfish species

Hudina, Sandra, Galic, Nika, Roessink, Ivo and Hock, Karlo (2011) Competitive interactions between co-occurring invaders: Identifying asymmetries between two invasive crayfish species. Biological Invasions, 13 8: 1791-1803. doi:10.1007/s10530-010-9933-2


Author Hudina, Sandra
Galic, Nika
Roessink, Ivo
Hock, Karlo
Title Competitive interactions between co-occurring invaders: Identifying asymmetries between two invasive crayfish species
Journal name Biological Invasions   Check publisher's open access policy
ISSN 1387-3547
1573-1464
Publication date 2011-01-01
Year available 2011
Sub-type Article (original research)
DOI 10.1007/s10530-010-9933-2
Open Access Status Not Open Access
Volume 13
Issue 8
Start page 1791
End page 1803
Total pages 13
Place of publication Dordrecht, The Netherlands
Publisher Springer Netherlands
Language eng
Subject 1105 Dentistry
2303 Ecology
Abstract Ecosystems today increasingly suffer invasions by multiple invasive species. Complex interactions between invasive species can have different fitness implications for each invader, which can in turn determine the future progression of their invasions and result in differential impacts on native species and ecosystems. To this end, through pair-wise and group scale experiments, we examined possible interaction outcomes, competition effects and their potential fitness implications for two widespread invasive species of crayfish that increasingly co-occur in freshwater ecosystems of Europe (Pacifastacus leniusulus and Orconectes limosus). In all trials, P. leniusculus demonstrated the potential to outcompete O. limosus in both staged encounters and direct resource competition, being more likely to win heterospecific agonistic encounters and to acquire shelters at a higher rate. Observed dyadic dominance was translated to a broader social context of group-scale experiments, in which dominance of P. leniusculus was further strengthened by size differential between species. O. limosus was not able to compensate for competitive pressure by the dominant P. leniusculus and suffered wet weight loss and more frequent injuries in the presence of P. leniusculus. While both species are detrimental to native ecosystems, the ability of P. leniusculus to withstand competition pressure from another successful invasive species underscores its potential to establish dominant populations. Our results highlight the importance of understanding interspecies competition in prioritizing potential management activities or control efforts in contact zones.
Keyword Agonistic interactions
Crayfish
Freshwater invasion
Interspecies competition
Invasive species
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 28 Aug 2014, 00:30:08 EST by Gail Walter on behalf of School of Biological Sciences