Repository logo
 
Publication

Effects of disturbance on marginal populations: Human trampling on Ascophyllum nodosum assemblages at its southern distribution limit

2009Journal article Open access
Simple item page
dc.contributor.authorAraújo, R.
dc.contributor.authorVaselli, S.
dc.contributor.authorAlmeida, M.
dc.contributor.authorSerrão, Ester
dc.contributor.authorSousa-Pinto, I.
dc.date.accessioned2014-05-30T14:29:29Z
dc.date.available2014-05-30T14:29:29Z
dc.date.issued2009
dc.date.updated2014-05-21T13:20:20Z
dc.description.abstractThe negative effects of disturbances on the long-term persistence of populations may be more severe in marginal populations, i.e. those occurring at the boundaries of geographical and eco- logical distribution ranges. Human trampling is an important source of anthropogenic disturbance for intertidal assemblages. Effects of human trampling on intertidal rocky shore assemblages dominated by Ascophyllum nodosum (L.) Le Jol. at its southern distributional limit in Europe were tested exper- imentally. Four different intensities of trampling disturbances were applied to experimental areas, over a period of 5 mo. Percentage cover of A. nodosum and associated organisms was quantified dur- ing the disturbance period and for a recovery period of 1 yr. The 2 highest trampling intensities dras- tically reduced the cover of A. nodosum. Trampling also negatively affected Fucus vesiculosus and understorey species, while indirectly allowing colonisation by ephemeral green algae. One year after the end of disturbance, A. nodosum assemblages in the highest disturbance intensity areas were still significantly different from assemblages in the control and lowest disturbance intensity areas. These results were mainly driven by a switch in the dominant canopy species, from A. nodosum to F. vesicu- losus. Results obtained in this study show that disturbance by human trampling negatively affects A. nodosum assemblages and that the effects are dependent on trampling intensity. These findings highlight the risk of local extinction imposed on these populations by anthropogenic disturbance, and the consequent need for protection measures for such sensitive populations.por
dc.identifier.citationAraújo, R.; Vaselli, S.; Almeida, M.; Serrão, E.A.; Sousa-Pinto, I.Effects of disturbance on marginal populations: Human trampling on Ascophyllum nodosum assemblages at its southern distribution limit, Marine Ecology Progress Series, 378, Mar. 2012, 81-92, 2009por
dc.identifier.doihttp://dx.doi.org/10.3354/meps07814
dc.identifier.issn0171-8630
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4139
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherInter Researchpor
dc.subjectAscophyllum nodosumpor
dc.subjectTrampling disturbancepor
dc.subjectDistributional range limitspor
dc.titleEffects of disturbance on marginal populations: Human trampling on Ascophyllum nodosum assemblages at its southern distribution limitpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage92por
oaire.citation.startPage81por
oaire.citation.titleMarine Ecology Progress Seriespor
oaire.citation.volume378por
person.familyNameSerrao
person.givenNameEster A.
person.identifierC-6686-2012
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-1316-658X
person.identifier.scopus-author-id7004093604
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Effects of disturbance on marginal populations Human trampling on Ascophyllum nodosum assemblages at its southern distribution limit.pdf
Size:
273.86 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.61 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CCM2-Artigos (em revistas ou actas indexadas)