Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica

6 páginas, 4 figuras, 1 tabla

Detalles Bibliográficos
Autores: Alcoverro, Teresa, Pérez-García, Marta, Romero, Javier
Tipo de recurso: artículo
Fecha de publicación:2004
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/136083
Acceso en línea:http://hdl.handle.net/10261/136083
Access Level:acceso abierto
Palabra clave:Seagrass
Carbon balance
Irradiance
Mediterranean Sea
Photosynthesis
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spelling Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanicaAlcoverro, TeresaPérez-García, MartaRomero, JavierSeagrassCarbon balanceIrradianceMediterranean SeaPhotosynthesis6 páginas, 4 figuras, 1 tablaTo assess the effects of shading by epiphytes on the carbon balance of the seagrass Posidonia oceanica, we examined the patterns of within-shoot epiphyte abundance on leaves, and their variability with season and depth. Epiphyte biomass was found to depend on leaf age (larger epiphyte load on older tissues), leaf side (more epiphytes on the inner face than on the outer) and depth (more epiphytes in deep meadows). Depth differences were maximum in spring and disappeared in late summer. Percent light absorbed (absorptance) by epiphytes was measured; light absorptance followed an exponential- saturated model with epiphyte biomass. Combining these data of percent light absorbed, within-shoot epiphyte biomass distribution and an existing carbon balance model, we conclude that reduction in carbon gains caused by epiphyte shading is relatively small, and greater in deep meadows (8.8% on average, with values up to 14.2% in May) than that in shallow water (4.7% on average with maximum values of 7% in August). This is mainly due to the accumulation of epiphytes on old tissues, which contribute only marginally to the carbon gain of the plant. Using the same procedure, we modelled the effects of a doubling in epiphyte biomass, conserving the observed within-shoot distribution. The result was a very small additional carbon loss. However, using the same biomass but modifying the distribution (shifting the same abundance towards younger leaf age classes), the reduction in carbon gains was dramatic, particularly in deep meadows (between 21% and 41%, depending on the shift used). Therefore, it is the epiphyte growth timing rate rather than the final biomass reached which seems to be a key control for Posidonia oceanica survival, especially near the deep limit of its distribution.Financial support was provided by a grant from CICYT (REN2002-04020).Peer reviewedWalter de GruyterConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162004info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/136083reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1515/BOT.2004.036Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1360832026-05-22T06:33:51Z
dc.title.none.fl_str_mv Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
title Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
spellingShingle Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
Alcoverro, Teresa
Seagrass
Carbon balance
Irradiance
Mediterranean Sea
Photosynthesis
title_short Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
title_full Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
title_fullStr Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
title_full_unstemmed Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
title_sort Importance of within-shoot epiphyte distribution for the carbon budget of seagrasses: the example of Posidonia oceanica
dc.creator.none.fl_str_mv Alcoverro, Teresa
Pérez-García, Marta
Romero, Javier
author Alcoverro, Teresa
author_facet Alcoverro, Teresa
Pérez-García, Marta
Romero, Javier
author_role author
author2 Pérez-García, Marta
Romero, Javier
author2_role author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Seagrass
Carbon balance
Irradiance
Mediterranean Sea
Photosynthesis
topic Seagrass
Carbon balance
Irradiance
Mediterranean Sea
Photosynthesis
description 6 páginas, 4 figuras, 1 tabla
publishDate 2004
dc.date.none.fl_str_mv 2004
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/136083
url http://hdl.handle.net/10261/136083
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1515/BOT.2004.036
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Walter de Gruyter
publisher.none.fl_str_mv Walter de Gruyter
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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