A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery

Detalhes bibliográficos
Autor(a) principal: Penedos, Cláudia Patrícia Tavares
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/13347
Resumo: Mestrado Management and Conservation of Natural Resources - Instituto Superior de Agronomia - UL / Universidade de Évora
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spelling A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recoveryseagrassspatial-temporal variationshabitat modificationclimate changePortugalMestrado Management and Conservation of Natural Resources - Instituto Superior de Agronomia - UL / Universidade de ÉvoraSeagrass beds provide higher biomass, abundance, diversity and productivity of ichthyofaunal communities than non-vegetated substrata. During 2008, the seagrass beds of Zostera noltii located in the lower Mira estuary (SW Portugal) disappeared completely. However, during 2009, slight symptoms of natural recovery were observed, a process which has since evolved intermittently. The main goal of this study was to investigate the temporal and spatial distribution patterns of the composition and structure of the ichthyofaunal communities under two distinct habitat ecological conditions: “before” the collapse, characterized by mature vegetation of the seagrass beds, and “after” recovery, corresponding to natural habitat recovery process of the seagrass beds. The following hypotheses were tested: there would be significant differences of the fish communities between i) the period “before” the habitat loss and “after”, during the natural recovery; and ii) seagrass beds and main channel under both ecological conditions. The temporal and spatial distribution patterns of the fish species composition and abundance were clearly different before the habitat loss and after, during the natural recovery. “Before” the collapse the main channel and seagrass beds showed significant differences between the habitats, on the contrary, during the natural recovery it was not possible to distinguish both communities, which were much similar to those of the non-vegetated areas in the 1980s. Generally, fish communities of Z. noltii seagrass beds in the 1980s were more rich and diverse and with higher abundance of individuals. Apparently, disappearance of Z. noltii seagrass beds led to the disappearance or decrease in abundance of resident fish species in that habitat, which have not return to the system or recover the respective populations even after the beginning of the recovery of Z. noltii seagrass beds. This study also revealed that this system has registered an increased colonization from species with subtropical affinity, which might be related to gradual temperature increase at a global scale. However, modifications due to the collapse and recovery of the Z. noltii seagrass beds seemed to surpass the effects resulting from climate changesISA-ULCosta, José Lino OliveiraAdão, Maria Helena Soares MartinsRepositório da Universidade de LisboaPenedos, Cláudia Patrícia Tavares2020-01-01T01:30:10Z20162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/13347TID:201921634engPenedos, C.P.T. - A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery. Lisboa: ISA, 2016, 45 p.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:43:29Zoai:www.repository.utl.pt:10400.5/13347Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:59:20.299341Repositório 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 A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
title A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
spellingShingle A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
Penedos, Cláudia Patrícia Tavares
seagrass
spatial-temporal variations
habitat modification
climate change
Portugal
title_short A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
title_full A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
title_fullStr A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
title_full_unstemmed A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
title_sort A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery
author Penedos, Cláudia Patrícia Tavares
author_facet Penedos, Cláudia Patrícia Tavares
author_role author
dc.contributor.none.fl_str_mv Costa, José Lino Oliveira
Adão, Maria Helena Soares Martins
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Penedos, Cláudia Patrícia Tavares
dc.subject.por.fl_str_mv seagrass
spatial-temporal variations
habitat modification
climate change
Portugal
topic seagrass
spatial-temporal variations
habitat modification
climate change
Portugal
description Mestrado Management and Conservation of Natural Resources - Instituto Superior de Agronomia - UL / Universidade de Évora
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
2020-01-01T01:30:10Z
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/10400.5/13347
TID:201921634
url http://hdl.handle.net/10400.5/13347
identifier_str_mv TID:201921634
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Penedos, C.P.T. - A comparative analysis of fish communities associated to Zostera noltii beds before a major vegetation collapse and during the natural habitat recovery. Lisboa: ISA, 2016, 45 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISA-UL
publisher.none.fl_str_mv ISA-UL
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
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