Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae

Detalhes bibliográficos
Autor(a) principal: Cruz, Joana Maria dos Reis Franco
Data de Publicação: 2007
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/266
Resumo: Dissertação mest., Estudos Marinhos e Costeiros, Universidade do Algarve, 2007
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spelling Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgaeTesesAlgas marinhasFucus vesiculosusSphaerococcus coronopifoliusDissertação mest., Estudos Marinhos e Costeiros, Universidade do Algarve, 2007Serrão, EsterHerbivores have been repeatedly shown to induce defences in terrestrial plants, but few examples exist from marine macroalgae. In two bio-assayed laboratory experiments we tested the effects of (1) direct amphipod consumption, (2) water borne cues from nearby grazed conspecifics, and (3) water-borne cues from non grazing consumers on the induction of anti-herbivore defences in macroalgae of the southern coast of Portugal. Both the brown alga Fucus vesiculosus and the red alga Sphaerococcus coronopifolius displayed distinct defence regulation. They induced defences when consumers were present and reduced defences again when consumption ceased. A reduction in palatability was considered to be indicative of an alga’s defence mechanism. Defence regulation reacted to consumption stimuli in less than two weeks. For F. vesiculosus we found the defence activity in the lipophilic fraction of the alga’s chemistry. Both algal species induce defences after receiving water-borne signals from nearby grazed conspecifics as well as non-grazing amphipods. These results imply that species of red and brown algae can recognise a suite of cues indicating herbivore pressure, allowing them to adjust their defensive traits in finely tuned short-term responses. Inducible defences may be more common in macroalgae than suspected.Molis, MarkusSapientiaCruz, Joana Maria dos Reis Franco2011-09-07T16:04:17Z20072007-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfhttp://hdl.handle.net/10400.1/266eng582.26 CRU*Ind Caveinfo: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:RCAAP2023-07-24T10:11:00Zoai:sapientia.ualg.pt:10400.1/266Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:54:39.098751Repositório 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 Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
title Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
spellingShingle Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
Cruz, Joana Maria dos Reis Franco
Teses
Algas marinhas
Fucus vesiculosus
Sphaerococcus coronopifolius
title_short Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
title_full Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
title_fullStr Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
title_full_unstemmed Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
title_sort Induction of anti-herbivore defences by direct amphipod consumption and water borne grazer cues in macroalgae
author Cruz, Joana Maria dos Reis Franco
author_facet Cruz, Joana Maria dos Reis Franco
author_role author
dc.contributor.none.fl_str_mv Molis, Markus
Sapientia
dc.contributor.author.fl_str_mv Cruz, Joana Maria dos Reis Franco
dc.subject.por.fl_str_mv Teses
Algas marinhas
Fucus vesiculosus
Sphaerococcus coronopifolius
topic Teses
Algas marinhas
Fucus vesiculosus
Sphaerococcus coronopifolius
description Dissertação mest., Estudos Marinhos e Costeiros, Universidade do Algarve, 2007
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01T00:00:00Z
2011-09-07T16:04:17Z
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/10400.1/266
url http://hdl.handle.net/10400.1/266
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 582.26 CRU*Ind Cave
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
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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