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Non-indigenous species in soft-sediments: are some estuaries more invaded than others?

2020-03Journal article Restricted access
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dc.contributor.authorCabral, Sara
dc.contributor.authorCarvalho, Frederico
dc.contributor.authorGaspar, Miguel
dc.contributor.authorRamajal, Joao
dc.contributor.authorSa, Erica
dc.contributor.authorSantos, Catia
dc.contributor.authorSilva, Gilda
dc.contributor.authorSousa, Antonio
dc.contributor.authorCosta, Jose Lino
dc.contributor.authorChainho, Paula
dc.date.accessioned2021-06-24T11:35:52Z
dc.date.available2021-06-24T11:35:52Z
dc.date.issued2020-03
dc.description.abstractNon-indigenous species (NIS) are increasingly widespread and abundant in coastal areas, hence being considered indicators to assess the environmental status of marine waters under the Marine Strategy Framework Directive. However, information on the effects of biological invasions on species composition and abundance is still scarce, particularly for soft-sediment benthic communities, which remain poorly understood. Therefore, the present study aimed at monitoring the benthic communities of two Portuguese estuarine systems, with a particular focus on NIS. Sampling surveys were conducted at the Tagus and Sado estuaries, in three different years. Invertebrate communities were collected at sampling stations located along the estuarine gradient, using a clam dredge, and several water and sediment parameters were measured at the same locations. NIS represented nearly one fourth (23%) of the total observed individuals across all years and estuaries, with Ruditapes philippinarum accounting for 22% of the total abundance across estuaries and years. Although both estuaries presented a similar total number of species (91 at the Tagus and 81 at the Sado), three-fold more NIS were identified at the Tagus estuary. The frequency of occurrence of the NIS Crassostrea (Magallana) gigas, Mya arenaria and Panopeus occidentalis increased significantly over the three years at the Tagus estuary and decreased significantly for Dyspanopeus sayi from 2015 to 2018. The Tagus and Sado estuaries presented distinct and diverse communities, with the abundance of R. philippinarum being eleven-fold greater at the Tagus estuary than at the Sado estuary. This study provides a baseline list of the NIS occurring in two of the main Portuguese estuarine systems, as well as an approach to estimate NIS abundance, richness, frequency of occurrence and community diversity. Although most studies on NIS impacts have focused on single species, the assessment of the environmental status of marine waters requires that overall impacts of NIS on marine ecosystems are determined. This study indicated metrics that are appropriate to evaluate changes in soft-sediment benthic communities associated to the introduction of NIS.
dc.description.sponsorshipFundacao para a Ciencia e Tecnologia (FCT)Portuguese Foundation for Science and TechnologyEuropean Commission [UID/MAR/04292/2019]
dc.description.sponsorshipproject CRASSOSADO
dc.description.sponsorshipproject AQUASADO (Programa Mar 2020)
dc.description.sponsorshipproject COCKLES (Interreg Atlantic) [EAPA_458/2016]
dc.description.sponsorshipproject NIPOGES (Programa Mar 2020)
dc.description.sponsorshipproject COASTNET [PINFRA/22128/2016]
dc.description.sponsorshipDirecao Geral de Recursos Naturais, Seguranca e Recursos Maritimos (DGRM)
dc.description.sponsorshipInstituto da Conservacao da Natureza e das Florestas (ICNF)
dc.description.sponsorship[SFRH/BD/145746/2019]
dc.identifier.doi10.1016/j.ecolind.2019.105640
dc.identifier.issn1470-160X
dc.identifier.urihttp://hdl.handle.net/10400.1/16560
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectBenthic communities
dc.subjectInvasive species
dc.subjectInvertebrate megafauna
dc.subjectPortugal
dc.subjectSado estuary
dc.subjectTagus estuary
dc.subject.otherBiodiversity & Conservation; Environmental Sciences & Ecology
dc.titleNon-indigenous species in soft-sediments: are some estuaries more invaded than others?
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage105640
oaire.citation.titleEcological Indicators
oaire.citation.volume110
person.familyNameGaspar
person.givenNameMiguel
person.identifier.ciencia-idF719-07AC-E41F
person.identifier.orcid0000-0001-9245-8518
person.identifier.ridF-5398-2011
person.identifier.scopus-author-id23501123500
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication6185b7ee-acc9-4a7e-a7db-37384e94f4df
relation.isAuthorOfPublication.latestForDiscovery6185b7ee-acc9-4a7e-a7db-37384e94f4df

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