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Movement behaviour and mortality in invasive and indigenous mussels: resilience and resistance strategies at different spatial scales

2008Journal article Open access
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dc.contributor.authorNicastro, Katy
dc.contributor.authorZardi, Gerardo
dc.contributor.authorMcQuaid, C. D.
dc.date.accessioned2018-12-07T14:58:36Z
dc.date.available2018-12-07T14:58:36Z
dc.date.issued2008
dc.description.abstractThe responses of indigenous and exotic species to environmental factors can differ across spatial and temporal scales, and it is this difference that determines invasion success and the dynamics of co-existence, In South Africa, the indigenous Perna perna and the invasive Mytilus galloprovincialis are the dominant intertidal mussels on the southern coast, where they co-exist. We compared their movement behaviour over 6 mo at small scales (within and at the edge of mussel beds) and at meso scales (in bays and on the open coast). M, galloprovincialis moved more and had higher mortality rates than did P. perna. For both species, mortality was greater at the edge than at the centre of beds, and on the open coast than in bays. Mussels at the edge of beds moved more than those within beds, but, while this was true for M. galloprovincialis in both habitats, P. perna did not show a position effect on the open coast. Cross-correlation analysis showed that movement rates of both species were correlated with mortality rates after a lag of 1. mo. These results suggest that following mortality events, mussels react to increased availability of space and decreased attachment to neighbours by increasing their movement to reorganise into a safer arrangement. However, P. perna and M. galloprovincialis effectively adopt resistance and resilience strategies, respectively. The effectiveness of each strategy depends on environmental conditions in different habitats, influencing the possibility of co-existence. The higher hydrodynamic stresses experienced in open coast habitats and at the edge of a mussel bed are disadvantageous to the more active, less strongly attached invasive species.
dc.description.sponsorshipClaude Harris Leon Foundation; Rhodes University; National Research Foundation of South Africa
dc.identifier.doi10.3354/meps07671
dc.identifier.issn0171-8630
dc.identifier.urihttp://hdl.handle.net/10400.1/12112
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInter-Research
dc.subjectMytilus-Edulis-L
dc.subjectPerna-Perna Mussels
dc.subjectAttachment Strength
dc.subjectIntertidal Mussels
dc.subjectWave Exposure
dc.subjectSouth-Africa
dc.subjectGalloprovincialis Mussels
dc.subjectTemporal Variability
dc.subjectReproductive Output
dc.subjectCommunities
dc.titleMovement behaviour and mortality in invasive and indigenous mussels: resilience and resistance strategies at different spatial scales
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage126
oaire.citation.startPage119
oaire.citation.titleMarine Ecology Progress Series
oaire.citation.volume372
person.familyNameNicastro
person.familyNameZardi
person.givenNameKaty
person.givenNameGerardo
person.identifier.ciencia-id3E12-714B-AFE5
person.identifier.ciencia-id3113-ECA6-BF96
person.identifier.orcid0000-0002-7071-141X
person.identifier.orcid0000-0001-8798-5794
person.identifier.ridD-2259-2012
person.identifier.ridM-4026-2013
person.identifier.scopus-author-id12646675100
person.identifier.scopus-author-id12647766300
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication6268844a-b0a2-4aa5-9616-c3afaba0e2ca
relation.isAuthorOfPublicationd9f86e72-0836-4fa3-8351-a85a97d85b4d
relation.isAuthorOfPublication.latestForDiscovery6268844a-b0a2-4aa5-9616-c3afaba0e2ca

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