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Marine angiosperm indices used to assess ecological status within the Water Framework Directive and South African National Water Act: Learning from differences and common issues

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dc.contributor.authorDuarte, Bernardo
dc.contributor.authorNeto, João
dc.contributor.authorMarques, J. C.
dc.contributor.authorAdams, Janine B.
dc.contributor.authorCaçador, Isabel
dc.date.accessioned2019-06-25T09:42:23Z
dc.date.available2019-06-25T09:42:23Z
dc.date.issued2017
dc.description.abstractThis paper reviews and discusses the methods and metrics used for the assessment of the ecological status of marine angiosperms comparing the European with the South African situation. In Europe salt marsh and seagrasses are an important biological element for establishing the ecological quality status of transitional waters and in South Africa changes over time in the salt marsh and submerged macrophyte habitats (species richness, abundance and community composition) is used nationally to assess the health of estuaries. In Europe several studies have developed metrics that include salt marsh species composition and community structure to assess the ecological quality status. Deviation of taxonomic composition and abundance from a reference situation is investigated. Multi-metric approaches have been shown to provide a more holistic view of the ecological status of the ecosystem. Many indices are highly dependent on historical data to assess the deviation from reference conditions. Within the WFD spirit one widely used approach for salt marsh assessment, the Best’s method, the baseline can be determined based on the first sampling effort, by the largest previously recorded size of the salt marsh or using the “maximum potential size” of the salt marsh from habitat prediction models. In South Africa all habitat below the 5 m contour line is considered estuary habitat and any land occupied here by agricultural or other developments is considered as a loss of habitat from the reference condition. For seagrasses European metrics are based on attributes from the community (e.g., taxonomic composition, epiphytes), the population (e.g., bed extent, shoots density), but also quantified at individual species (e.g., leaves length) or physiological levels (e.g., stable isotopic signatures). Seagrass habitats in South African estuaries are highly dynamic in response to floods and an understanding of this is needed before present ecological status can be assessed.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ecolind.2017.07.032pt_PT
dc.identifier.issn1470-160X
dc.identifier.urihttp://hdl.handle.net/10451/38780
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectSalt marshespt_PT
dc.subjectSeagrassespt_PT
dc.subjectEcological quality assessmentpt_PT
dc.subjectEnvironmental directivespt_PT
dc.titleMarine angiosperm indices used to assess ecological status within the Water Framework Directive and South African National Water Act: Learning from differences and common issuespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage200pt_PT
oaire.citation.startPage192pt_PT
oaire.citation.titleEcological Indicatorspt_PT
oaire.citation.volume83pt_PT
person.familyNameDuarte
person.familyNameNeto
person.familyNameMARQUES
person.familyNameCaçador
person.givenNameBernardo
person.givenNameJoão
person.givenNameJOÃO CARLOS
person.givenNameIsabel
person.identifier89449
person.identifier134821
person.identifier.ciencia-id731E-093F-D4C8
person.identifier.ciencia-id4213-127C-A1FB
person.identifier.ciencia-id9F11-7A1E-BEEC
person.identifier.ciencia-id631C-9FFE-CA81
person.identifier.orcid0000-0003-1914-7435
person.identifier.orcid0000-0002-9033-3671
person.identifier.orcid0000-0001-8865-8189
person.identifier.orcid0000-0002-4475-6091
person.identifier.ridH-2001-2011
person.identifier.ridF-1159-2013
person.identifier.ridL-9478-2014
person.identifier.ridC-2618-2012
person.identifier.scopus-author-id20734149900
person.identifier.scopus-author-id7103353022
person.identifier.scopus-author-id7203032961
person.identifier.scopus-author-id6602533871
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa72f0f40-c224-49ad-ba21-ebb5f9aab09c
relation.isAuthorOfPublication9b909a7f-e284-4943-8301-955902061fe2
relation.isAuthorOfPublication97130a55-0383-4d1b-8d73-4a5ca889e529
relation.isAuthorOfPublication02ecb390-88b9-4e2f-8690-eba66c3b5311
relation.isAuthorOfPublication.latestForDiscovery02ecb390-88b9-4e2f-8690-eba66c3b5311

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