Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day

Detalhes bibliográficos
Autor(a) principal: Coelho, H.
Data de Publicação: 2011
Outros Autores: Cartaxana, P., Brotas, V., Queiroga, Henrique, Serôdio, J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/25583
Resumo: The microphytobenthos (MPB) – Hydrobia ulvae trophic interaction is one of the main channels of material transfer to higher trophic levels in intertidal mudflats. A new non-invasive approach to evaluate the grazing activity of H. ulvae on microphytobenthos is proposed. The effects of season and period (combination of tide and day/night) on ingestion rates of H. ulvae (using 14Clabeled MPB) and egested pheopigments a (using HPLC pigment analysis) were also investigated. H. ulvae ingestion rate was found to vary significantly over season and period, being higher in summer and during diurnal low tide periods. This is possibly related to higher growth rates of H. ulvaein summer, as well as to an increase in surface MPB biomass during diurnal low tides. A highly significant relationship was found between ingested chl a and egested pheophorbide a, allowing the estimation of ingestion rate from the amount of egested pheophorbide a on H. ulvae faecal pellets. This new non-invasive methodology may allow the improvement of long-term studies of consumption rates and the evaluation of grazing of H. ulvae on MPB.
id RCAP_218714054feb20cb17e72fba1eed5a88
oai_identifier_str oai:ria.ua.pt:10773/25583
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of dayPheophorbide a/chl a ratioIngestion rateGrazingMicrophytobenthosHydrobia ulvaeThe microphytobenthos (MPB) – Hydrobia ulvae trophic interaction is one of the main channels of material transfer to higher trophic levels in intertidal mudflats. A new non-invasive approach to evaluate the grazing activity of H. ulvae on microphytobenthos is proposed. The effects of season and period (combination of tide and day/night) on ingestion rates of H. ulvae (using 14Clabeled MPB) and egested pheopigments a (using HPLC pigment analysis) were also investigated. H. ulvae ingestion rate was found to vary significantly over season and period, being higher in summer and during diurnal low tide periods. This is possibly related to higher growth rates of H. ulvaein summer, as well as to an increase in surface MPB biomass during diurnal low tides. A highly significant relationship was found between ingested chl a and egested pheophorbide a, allowing the estimation of ingestion rate from the amount of egested pheophorbide a on H. ulvae faecal pellets. This new non-invasive methodology may allow the improvement of long-term studies of consumption rates and the evaluation of grazing of H. ulvae on MPB.Inter Research2019-03-13T15:47:08Z2011-01-01T00:00:00Z2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/25583eng1864-778210.3354/ab00356Coelho, H.Cartaxana, P.Brotas, V.Queiroga, HenriqueSerôdio, J.info: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:RCAAP2024-02-22T11:48:19Zoai:ria.ua.pt:10773/25583Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:58:16.913083Repositório 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 Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
title Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
spellingShingle Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
Coelho, H.
Pheophorbide a/chl a ratio
Ingestion rate
Grazing
Microphytobenthos
Hydrobia ulvae
title_short Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
title_full Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
title_fullStr Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
title_full_unstemmed Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
title_sort Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenthos ingestion: variation over season and period of day
author Coelho, H.
author_facet Coelho, H.
Cartaxana, P.
Brotas, V.
Queiroga, Henrique
Serôdio, J.
author_role author
author2 Cartaxana, P.
Brotas, V.
Queiroga, Henrique
Serôdio, J.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Coelho, H.
Cartaxana, P.
Brotas, V.
Queiroga, Henrique
Serôdio, J.
dc.subject.por.fl_str_mv Pheophorbide a/chl a ratio
Ingestion rate
Grazing
Microphytobenthos
Hydrobia ulvae
topic Pheophorbide a/chl a ratio
Ingestion rate
Grazing
Microphytobenthos
Hydrobia ulvae
description The microphytobenthos (MPB) – Hydrobia ulvae trophic interaction is one of the main channels of material transfer to higher trophic levels in intertidal mudflats. A new non-invasive approach to evaluate the grazing activity of H. ulvae on microphytobenthos is proposed. The effects of season and period (combination of tide and day/night) on ingestion rates of H. ulvae (using 14Clabeled MPB) and egested pheopigments a (using HPLC pigment analysis) were also investigated. H. ulvae ingestion rate was found to vary significantly over season and period, being higher in summer and during diurnal low tide periods. This is possibly related to higher growth rates of H. ulvaein summer, as well as to an increase in surface MPB biomass during diurnal low tides. A highly significant relationship was found between ingested chl a and egested pheophorbide a, allowing the estimation of ingestion rate from the amount of egested pheophorbide a on H. ulvae faecal pellets. This new non-invasive methodology may allow the improvement of long-term studies of consumption rates and the evaluation of grazing of H. ulvae on MPB.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01T00:00:00Z
2011
2019-03-13T15:47:08Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10773/25583
url http://hdl.handle.net/10773/25583
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1864-7782
10.3354/ab00356
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 Inter Research
publisher.none.fl_str_mv Inter Research
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_ 1799137637370429440