Publication
Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast
| Summary: | Physical processes that force transport of planktonic larvae of invertebrates are responsible for some of the spatial and temporal variability in recruitment. We investigated the influence of tide- and winddriven circulation on intra-year variability of megalopal supply to populations of the crab Carcinus maenas in 2 estuaries on the Portuguese west coast. Daily data on physical variables and on supply and settlement of megalopae were subjected to time series analysis and multiple regression techniques in order to identify periodicity in the variables as well as time lags between larval supply and physical variables. Relaxation of northerly winds, which favor upwelling, was associated with temperature increase and subtidal sea level rise at the coast, which are indicative of coastal convergence of the surface layer. Supply of megalopae to the estuaries, as measured with passive plankton nets, followed a fortnightly cycle with maximum larval supply at the time of maximum tidal amplitude. Supply was enhanced by southerly winds, with delays of 0 to –2 d. Settlement of megalopae on artificial settlement substrates deployed on the bottom was uncoupled to supply at both estuaries. Therefore, transport of C. maenas megalopae to the nearshore is accomplished by onshore advection following downwelling winds, and supply to the estuaries occurs by selective tidal stream transport. Involvement of internal waves and internal tidal bores cannot be be ruled out, but very particular periodicities of the generating mechanisms would have to be assumed to account for the observed time lags. |
|---|---|
| Main Authors: | Queiroga, Henrique |
| Other Authors: | Almeida, Maria João; Alpuim, Teresa; Flores, Augusto A. V.; Francisco, Sara Martins; Gonzàlez-Gordillo, Ignácio; Miranda, Ana Isabel; Silva, Inês C.; Paula, José R. |
| Subject: | Larvae Recruitment Carcinus maenas Upwelling Tides |
| Year: | 2006 |
| Country: | Portugal |
| Document type: | article |
| Access type: | open access |
| Associated institution: | Ispa-Instituto Universitário |
| Language: | English |
| Origin: | Repositório do Ispa - Instituto Universitário |
| _version_ | 1868077301303869440 |
|---|---|
| author | Queiroga, Henrique |
| author2 | Almeida, Maria João Alpuim, Teresa Flores, Augusto A. V. Francisco, Sara Martins Gonzàlez-Gordillo, Ignácio Miranda, Ana Isabel Silva, Inês C. Paula, José R. |
| author2_role | author author author author author author author author |
| author_facet | Queiroga, Henrique Almeida, Maria João Alpuim, Teresa Flores, Augusto A. V. Francisco, Sara Martins Gonzàlez-Gordillo, Ignácio Miranda, Ana Isabel Silva, Inês C. Paula, José R. |
| author_role | author |
| contributor_name_str_mv | Repositório do ISPA |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Queiroga, Henrique\"},{\"Person.name\":\"Almeida, Maria João\"},{\"Person.name\":\"Alpuim, Teresa\"},{\"Person.name\":\"Flores, Augusto A. V.\"},{\"Person.name\":\"Francisco, Sara Martins\"},{\"Person.name\":\"Gonzàlez-Gordillo, Ignácio\"},{\"Person.name\":\"Miranda, Ana Isabel\"},{\"Person.name\":\"Silva, Inês C.\"},{\"Person.name\":\"Paula, José R.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Repositório do ISPA |
| datacite.creators.creator.creatorName.fl_str_mv | Queiroga, Henrique Almeida, Maria João Alpuim, Teresa Flores, Augusto A. V. Francisco, Sara Martins Gonzàlez-Gordillo, Ignácio Miranda, Ana Isabel Silva, Inês C. Paula, José R. |
| datacite.date.Accepted.fl_str_mv | 2006-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2012-06-15T19:39:45Z |
| datacite.date.embargoed.fl_str_mv | 2012-06-15T19:39:45Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Larvae Recruitment Carcinus maenas Upwelling Tides |
| datacite.titles.title.fl_str_mv | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| dc.contributor.none.fl_str_mv | Repositório do ISPA |
| dc.creator.none.fl_str_mv | Queiroga, Henrique Almeida, Maria João Alpuim, Teresa Flores, Augusto A. V. Francisco, Sara Martins Gonzàlez-Gordillo, Ignácio Miranda, Ana Isabel Silva, Inês C. Paula, José R. |
| dc.date.Accepted.fl_str_mv | 2006-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2012-06-15T19:39:45Z |
| dc.date.embargoed.fl_str_mv | 2012-06-15T19:39:45Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10400.12/1466 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Inter-Research |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Larvae Recruitment Carcinus maenas Upwelling Tides |
| dc.title.fl_str_mv | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Physical processes that force transport of planktonic larvae of invertebrates are responsible for some of the spatial and temporal variability in recruitment. We investigated the influence of tide- and winddriven circulation on intra-year variability of megalopal supply to populations of the crab Carcinus maenas in 2 estuaries on the Portuguese west coast. Daily data on physical variables and on supply and settlement of megalopae were subjected to time series analysis and multiple regression techniques in order to identify periodicity in the variables as well as time lags between larval supply and physical variables. Relaxation of northerly winds, which favor upwelling, was associated with temperature increase and subtidal sea level rise at the coast, which are indicative of coastal convergence of the surface layer. Supply of megalopae to the estuaries, as measured with passive plankton nets, followed a fortnightly cycle with maximum larval supply at the time of maximum tidal amplitude. Supply was enhanced by southerly winds, with delays of 0 to –2 d. Settlement of megalopae on artificial settlement substrates deployed on the bottom was uncoupled to supply at both estuaries. Therefore, transport of C. maenas megalopae to the nearshore is accomplished by onshore advection following downwelling winds, and supply to the estuaries occurs by selective tidal stream transport. Involvement of internal waves and internal tidal bores cannot be be ruled out, but very particular periodicities of the generating mechanisms would have to be assumed to account for the observed time lags. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorio.ispa.pt/bitstreams/4d8a65c5-15e6-4ed4-a6a4-c4aa2125b3a7/download |
| id | ispa_5bbcf37517ca9963a72aa883fe1e6457 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10400.12/1466 |
| instacron_str | ispa |
| institution | Ispa-Instituto Universitário |
| instname_str | Ispa-Instituto Universitário |
| language | eng |
| network_acronym_str | ispa |
| network_name_str | Repositório do Ispa - Instituto Universitário |
| oai_identifier_str | oai:repositorio.ispa.pt:10400.12/1466 |
| organization_str_mv | urn:organizationAcronym:ispa |
| person_str_mv | Queiroga, Henrique Almeida, Maria João Alpuim, Teresa Flores, Augusto A. V. Francisco, Sara Martins Gonzàlez-Gordillo, Ignácio Miranda, Ana Isabel Silva, Inês C. Paula, José R. |
| publishDate | 2006 |
| publisher.none.fl_str_mv | Inter-Research |
| reponame_str | Repositório do Ispa - Instituto Universitário |
| repository_id_str | urn:repositoryAcronym:ispa |
| service_str_mv | urn:repositoryAcronym:ispa |
| spelling | engInter-ResearchporPhysical processes that force transport of planktonic larvae of invertebrates are responsible for some of the spatial and temporal variability in recruitment. We investigated the influence of tide- and winddriven circulation on intra-year variability of megalopal supply to populations of the crab Carcinus maenas in 2 estuaries on the Portuguese west coast. Daily data on physical variables and on supply and settlement of megalopae were subjected to time series analysis and multiple regression techniques in order to identify periodicity in the variables as well as time lags between larval supply and physical variables. Relaxation of northerly winds, which favor upwelling, was associated with temperature increase and subtidal sea level rise at the coast, which are indicative of coastal convergence of the surface layer. Supply of megalopae to the estuaries, as measured with passive plankton nets, followed a fortnightly cycle with maximum larval supply at the time of maximum tidal amplitude. Supply was enhanced by southerly winds, with delays of 0 to –2 d. Settlement of megalopae on artificial settlement substrates deployed on the bottom was uncoupled to supply at both estuaries. Therefore, transport of C. maenas megalopae to the nearshore is accomplished by onshore advection following downwelling winds, and supply to the estuaries occurs by selective tidal stream transport. Involvement of internal waves and internal tidal bores cannot be be ruled out, but very particular periodicities of the generating mechanisms would have to be assumed to account for the observed time lags.application/pdfporTide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coastQueiroga, HenriqueAlmeida, Maria JoãoAlpuim, TeresaFlores, Augusto A. V.Francisco, Sara MartinsGonzàlez-Gordillo, IgnácioMiranda, Ana IsabelSilva, Inês C.Paula, José R.HostingInstitutionOrganizationalRepositório do ISPAe-mailmailto:repositorio@ispa.ptrepositorio@ispa.ptISSNIsPartOf0171-86302012-06-15T19:39:45Z20062006-01-01T00:00:00ZHandlehttp://hdl.handle.net/10400.12/1466http://purl.org/coar/access_right/c_abf2open accessLarvaeRecruitmentCarcinus maenasUpwellingTides367194 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ispa.pt/bitstreams/4d8a65c5-15e6-4ed4-a6a4-c4aa2125b3a7/downloadMarine Ecology Progress Series2136Oldendorf/Luhe |
| spellingShingle | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast Queiroga, Henrique Larvae Recruitment Carcinus maenas Upwelling Tides |
| status | SINGLETON |
| subject.fl_str_mv | Larvae Recruitment Carcinus maenas Upwelling Tides |
| title | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| title_full | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| title_fullStr | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| title_full_unstemmed | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| title_short | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| title_sort | Tide and wind control of megalopal supply to estuarine crab populations on the Portuguese west coast |
| topic | Larvae Recruitment Carcinus maenas Upwelling Tides |
| topic_facet | Larvae Recruitment Carcinus maenas Upwelling Tides |
| url | http://hdl.handle.net/10400.12/1466 |
| visible | 1 |