Spatio-temporal dynamics of the zooplankton community of the Mondego estuary
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/22788 |
Resumo: | Estuaries are among the most valuable and productive aquatic systems in terms of their services to human welfare. In the last decades it has been highlighted the importance of plankton (and mainly zooplankton) in the dynamic of aquatic food webs. Zooplankton plays a pivotal ecological role in terms of biomass and energy fluxes transference between primary producers and higher trophic levels, being raised the importance of this group in ecological studies. Furthermore, spatio-temporal scales of zooplankton communities’ structure and composition are an important focus in ecological research. Thus, the main aim of this work was to study the spatio-temporal dynamics and vertical distribution of zooplankton community in the Mondego estuary (Portugal), based on monthly field surveys conducted from May 2012 to March 2014, at the bottom and surface, with a mesh net size of 335 μm, in high tide. In addition, the influence of environmental variables (e.g. temperature, salinity, nutrients concentration) in the distribution of zooplankton communities was determined. The occurrence of a extreme climate events (drought and flood conditions) during the study period also allowed examining the effects of the extreme weather conditions on zooplankton ecology. The results showed variations in the distribution and abundance of various zooplankton groups related to drought and flood conditions during the studied period. The main variation in environmental parameters was register to the salinity and temperature levels, leading to the predominance of marine species during drought events. It was also possible to identify that these variations occur in the bottom and surface communities, however, at the bottom was not registered so drastic changes compared to the zooplankton composition from the surface. |
id |
RCAP_5fcc840618c33e62e53ebc5a99bef23d |
---|---|
oai_identifier_str |
oai:ria.ua.pt:10773/22788 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuaryZooplâncton - Estuário do MondegoDistribuição vertical (Biologia aquática)Alterações climáticasEstuaries are among the most valuable and productive aquatic systems in terms of their services to human welfare. In the last decades it has been highlighted the importance of plankton (and mainly zooplankton) in the dynamic of aquatic food webs. Zooplankton plays a pivotal ecological role in terms of biomass and energy fluxes transference between primary producers and higher trophic levels, being raised the importance of this group in ecological studies. Furthermore, spatio-temporal scales of zooplankton communities’ structure and composition are an important focus in ecological research. Thus, the main aim of this work was to study the spatio-temporal dynamics and vertical distribution of zooplankton community in the Mondego estuary (Portugal), based on monthly field surveys conducted from May 2012 to March 2014, at the bottom and surface, with a mesh net size of 335 μm, in high tide. In addition, the influence of environmental variables (e.g. temperature, salinity, nutrients concentration) in the distribution of zooplankton communities was determined. The occurrence of a extreme climate events (drought and flood conditions) during the study period also allowed examining the effects of the extreme weather conditions on zooplankton ecology. The results showed variations in the distribution and abundance of various zooplankton groups related to drought and flood conditions during the studied period. The main variation in environmental parameters was register to the salinity and temperature levels, leading to the predominance of marine species during drought events. It was also possible to identify that these variations occur in the bottom and surface communities, however, at the bottom was not registered so drastic changes compared to the zooplankton composition from the surface.Os estuários são dos sistemas aquáticos mais valiosos e produtivos em termos de bens e serviços para o bem-estar humano. Nas últimas décadas, evidenciou-se a importância do plâncton (e principalmente do zooplâncton) na dinâmica das cadeias tróficas aquáticas. O zooplâncton desempenha um papel ecológico fundamental em termos de transferência de fluxos de biomassa e energia entre produtores primários e níveis tróficos superiores, contribuindo para a importância deste grupo em estudos ecológicos. Além disso, escalas espaço-temporais da estrutura e composição das comunidades de zooplâncton são um foco importante em estudos ecológicos. Assim, o objetivo principal deste trabalho foi estudar a dinâmica espaço-temporal e a distribuição vertical da comunidade de zooplâncton no estuário do Mondego (Portugal), com base em campanhas mensais realizadas de maio de 2012 a março de 2014, no fundo à superfície, com uma rede de 335 μm de poro, em preia-mar. Determinou-se ainda a influência de variáveis ambientais (por exemplo, temperatura, salinidade, concentração de nutrientes) na distribuição da comunidade de zooplâncton. A ocorrência de eventos climáticos extremos (condições de seca e inundação) durante o período de estudo também permitiu determinar efeitos das condições climáticas extremas na ecologia do zooplâncton. Os resultados mostraram variações na distribuição e nas abundâncias de vários grupos de zooplâncton relacionados com condições de seca e inundações registadas durante o período de estudo. A principal variação nos parâmetros ambientais foi nos valores de salinidade e temperatura, levando ao predomínio de espécies marinhas em períodos de seca. Foi possível também identificar que estas variações ocorrem tanto nas comunidades de fundo como de superfície, no entanto, não se registam variações tão drásticas na composição da comunidade de zooplâncton no fundo.Universidade de Aveiro2020-01-15T00:00:00Z2017-01-15T00:00:00Z2017-01-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/22788TID:201943395engSantos, Leonardo Valente dosinfo: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:RCAAP2024-05-06T04:13:57Zoai:ria.ua.pt:10773/22788Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-06T04:13:57Repositório 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 |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
title |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
spellingShingle |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary Santos, Leonardo Valente dos Zooplâncton - Estuário do Mondego Distribuição vertical (Biologia aquática) Alterações climáticas |
title_short |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
title_full |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
title_fullStr |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
title_full_unstemmed |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
title_sort |
Spatio-temporal dynamics of the zooplankton community of the Mondego estuary |
author |
Santos, Leonardo Valente dos |
author_facet |
Santos, Leonardo Valente dos |
author_role |
author |
dc.contributor.author.fl_str_mv |
Santos, Leonardo Valente dos |
dc.subject.por.fl_str_mv |
Zooplâncton - Estuário do Mondego Distribuição vertical (Biologia aquática) Alterações climáticas |
topic |
Zooplâncton - Estuário do Mondego Distribuição vertical (Biologia aquática) Alterações climáticas |
description |
Estuaries are among the most valuable and productive aquatic systems in terms of their services to human welfare. In the last decades it has been highlighted the importance of plankton (and mainly zooplankton) in the dynamic of aquatic food webs. Zooplankton plays a pivotal ecological role in terms of biomass and energy fluxes transference between primary producers and higher trophic levels, being raised the importance of this group in ecological studies. Furthermore, spatio-temporal scales of zooplankton communities’ structure and composition are an important focus in ecological research. Thus, the main aim of this work was to study the spatio-temporal dynamics and vertical distribution of zooplankton community in the Mondego estuary (Portugal), based on monthly field surveys conducted from May 2012 to March 2014, at the bottom and surface, with a mesh net size of 335 μm, in high tide. In addition, the influence of environmental variables (e.g. temperature, salinity, nutrients concentration) in the distribution of zooplankton communities was determined. The occurrence of a extreme climate events (drought and flood conditions) during the study period also allowed examining the effects of the extreme weather conditions on zooplankton ecology. The results showed variations in the distribution and abundance of various zooplankton groups related to drought and flood conditions during the studied period. The main variation in environmental parameters was register to the salinity and temperature levels, leading to the predominance of marine species during drought events. It was also possible to identify that these variations occur in the bottom and surface communities, however, at the bottom was not registered so drastic changes compared to the zooplankton composition from the surface. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-15T00:00:00Z 2017-01-15 2020-01-15T00:00:00Z |
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/10773/22788 TID:201943395 |
url |
http://hdl.handle.net/10773/22788 |
identifier_str_mv |
TID:201943395 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de Aveiro |
publisher.none.fl_str_mv |
Universidade de Aveiro |
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 |
mluisa.alvim@gmail.com |
_version_ |
1817543668319387648 |