Vertical dynamics of planktonic communities at Sofala Bank, Mozambique

Detalhes bibliográficos
Autor(a) principal: Leal, Miguel Albuquerque da Costa 1986-
Data de Publicação: 2009
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/1224
Resumo: Tese de mestrado, Ecologia marinha, 2009, Universidade de Lisboa, Faculdade de Ciências
id RCAP_f694f7d404ccd9860da413e688052ce9
oai_identifier_str oai:repositorio.ul.pt:10451/1224
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Vertical dynamics of planktonic communities at Sofala Bank, MozambiqueEcossistemas aquáticosZooplânctonTeses de mestradoTese de mestrado, Ecologia marinha, 2009, Universidade de Lisboa, Faculdade de CiênciasCoastal ecosystems are largely influenced by the interaction of several factors operating at various temporal and spatial scales, specifically those responsible for primary and secondary production processes that modulate marine resources. Hydrological processes (e.g. tides and coastal currents), nutrients availability, phytoplankton groups, zooplankton and larval fish (specifically the clupeid Herklotsichths quadrimaculatus) abundance and distribution were investigated at the Sofala Bank (Mozambique), with special emphasis on their horizontal distribution and vertical dynamics. Horizontal distribution has shown onshore‐offshore gradients in all analysed parameters, as well as inshore waters intrusion probably related to Zambezi River delta runoff. Tidal currents were responsible for major hydrological vertical variations and for horizontal and vertical advection of phytoplankton biomass in the surface and deepest layers, respectively. Nutrient concentrations were typical from oligotrophic regions, and nutrient ratios were strongly influenced by depleted nitrite + nitrate concentrations, suggesting low estuarine discharges typical from the dry season. Both phytoplankton pigments and zooplankton were found mainly near bottom (40 m deep), despite the latter displayed vertical migrations triggered by light variations. Phytoplankton community was dominated by microflagellates, specifically prymnesiophyceans, and vertical distribution changes were similar for the whole community. Cyanobacteria was the only phytoplankton group that displayed a different vertical distribution pattern, mainly concentrated at mid water column depths (10 20 m). Herklotsichthys quadrimaculatus larvae displayed typical diel vertical migrations and were mainly distributed in the upper water column (0 20 m) during the night and almost absent from all sampled strata during the day. Larger larvae dominated the neuston layer during the night while during daylight periods remained close to the bottom. This investigation enhances the importance of physico‐chemical phenomena determining the planktonic communities vertical dynamics at a tropical coastal ecosystem of the Western Indian Ocean, where planktonic dynamics are still poorly described and understoodResumo alargado disponível em portuguêsPaula, José Pavão Mendes de, 1959-Brotas, Vanda, 1958-Repositório da Universidade de LisboaLeal, Miguel Albuquerque da Costa 1986-2010-07-27T08:55:36Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdftext/xmlhttp://hdl.handle.net/10451/1224enghttp://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000558886info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T15:40:34Zoai:repositorio.ul.pt:10451/1224Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:27:53.038194Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
title Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
spellingShingle Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
Leal, Miguel Albuquerque da Costa 1986-
Ecossistemas aquáticos
Zooplâncton
Teses de mestrado
title_short Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
title_full Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
title_fullStr Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
title_full_unstemmed Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
title_sort Vertical dynamics of planktonic communities at Sofala Bank, Mozambique
author Leal, Miguel Albuquerque da Costa 1986-
author_facet Leal, Miguel Albuquerque da Costa 1986-
author_role author
dc.contributor.none.fl_str_mv Paula, José Pavão Mendes de, 1959-
Brotas, Vanda, 1958-
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Leal, Miguel Albuquerque da Costa 1986-
dc.subject.por.fl_str_mv Ecossistemas aquáticos
Zooplâncton
Teses de mestrado
topic Ecossistemas aquáticos
Zooplâncton
Teses de mestrado
description Tese de mestrado, Ecologia marinha, 2009, Universidade de Lisboa, Faculdade de Ciências
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-01-01T00:00:00Z
2010-07-27T08:55:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/1224
url http://hdl.handle.net/10451/1224
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000558886
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
text/xml
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799134161361960960

Registros relacionados