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Seagrass connectivity on the West Coast of Africa supports the Hypothesis of Grazer-Mediated Seed Dispersal

2022Journal article Open access
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dc.contributor.authorTavares, Ana I
dc.contributor.authorAssis, Jorge
dc.contributor.authorPatrício, A. R.
dc.contributor.authorFerreira, Rogério
dc.contributor.authorCheikh, Mohamed Ahmed Sidi
dc.contributor.authorBandeira, Salomão
dc.contributor.authorRegalla, Aissa
dc.contributor.authorSantos, Iderlindo
dc.contributor.authorPotouroglou, Maria
dc.contributor.authorNicolau, Suzana
dc.contributor.authorTeodosio, Maria
dc.contributor.authorAlmada, Carmen
dc.contributor.authorSantos, Rui
dc.contributor.authorPearson, Gareth
dc.contributor.authorSerrao, Ester
dc.date.accessioned2022-11-25T13:24:01Z
dc.date.available2022-11-25T13:24:01Z
dc.date.issued2022
dc.description.abstractPopulation connectivity influences the distribution of genetic diversity and divergence along a species range, as the likelihood of extinction or differentiation increases in isolated populations. However, there is still poor understanding of the processes mediating inter-population dispersal in marine species that are sessile and lack planktonic life stages. One such case is the seagrass species Halodule wrightii, which produces basal seeds, although detached plants can drift. Along the tropical western coast of Africa, this species occurs in distant discontinuous habitats, raising the question of how interpopulation dispersal is mediated. The species is a key source of ecosystem functions including feeding large migratory grazers. This study aims to infer whether genetic differentiation of the seagrass H. wrightii along the western coast of Africa supports a hypothesis of predominant transportation of rafting seagrass by ocean currents, versus the hypothesis of biotic vectors of dispersal. Additional hypotheses were addressed concerning range-wide clonality and genetic diversity, assessed with microsatellite markers on populations of the west coast of Africa from Mauritania to Angola. Population genetic diversity and structure were compared with predictions from biophysical models of dispersal by oceanographic currents. The genetic data revealed low divergence among most populations, in strong contrast with predictions of very low probability of connectivity mediated by currents along the western African coastline. Moderate to high genotypic diversity showed important seed recruitment, but genetic and genotypic diversities were lower at range edges. Populations north and south of the equator were differentiated, and remarkably, so were neighboring equatorial populations despite their proximity. These results reveal independent sources of colonization of meadows in these islands, which are major habitat for migratory grazing green turtles, also supporting the hypothesis of biotically mediated seed transport. The importance of seagrass for conservation of endangered macrofauna has been widely reported; here we report evidence supporting the reciprocal role, that macrofauna protection can also plays a role in long-term survival and reproductive success of seagrass.pt_PT
dc.description.sponsorshipLA/P/0101/2020; DL57/2016/CP1361/CT0035
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3389/fmars.2022.809721pt_PT
dc.identifier.eissn2296-7745
dc.identifier.urihttp://hdl.handle.net/10400.1/18540
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Mediapt_PT
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationContrasting evolutionary histories from the warm Atlantic to the cold Pacific - overlooked seagrass diversity
dc.relationHotspots de biodiversidade genética em florestas marinhas
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectWestern Africapt_PT
dc.subjectSeagrasspt_PT
dc.subjectHalodule wrightiipt_PT
dc.subjectPopulation connectivitypt_PT
dc.subjectDispersalpt_PT
dc.titleSeagrass connectivity on the West Coast of Africa supports the Hypothesis of Grazer-Mediated Seed Dispersalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleContrasting evolutionary histories from the warm Atlantic to the cold Pacific - overlooked seagrass diversity
oaire.awardTitleHotspots de biodiversidade genética em florestas marinhas
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FBIA-CBI%2F6515%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F138182%2F2018/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBSAB%2F150485%2F2019/PT
oaire.citation.titleFrontiers in Marine Sciencept_PT
oaire.citation.volume9pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
oaire.fundingStreamOE
person.familyNameTavares
person.familyNameAssis
person.familyNameFerreira
person.familyNameTeodosio
person.familyNameSantos
person.familyNamePearson
person.familyNameSerrao
person.givenNameAna I
person.givenNameJorge
person.givenNameRogério
person.givenNameMaria
person.givenNameRui
person.givenNameGareth Anthony
person.givenNameEster A.
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project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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