Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.

Autores
Helbling, Eduardo Walter; Carrillo, P.; Medina Sanchez, J. M.; Durán, C.; Herrera, G.; Villar Argaiz, M.; Villafañe, Virginia Estela
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Global change, together with human activities, has resulted in increasing amounts of organic material (includ-ing nutrients) that water bodies receive. This input further attenuates the penetration of solar radiation, leading to the view that opaque lakes are more “protected” from solar ul-traviolet radiation (UVR) than clear ones. Vertical mixing, however, complicates this view as cells are exposed to fluc-tuating radiation regimes, for which the effects have, in gen-eral, been neglected. Furthermore, the combined impacts of mixing, together with those of UVR and nutrient inputs are virtually unknown. In this study, we carried out complex in situ experiments in three high mountain lakes of Spain (Lake Enol in the National Park Picos de Europa, Asturias, and lakes Las Yeguas and La Caldera in the National Park Sierra Nevada, Granada), used as model ecosystems to evaluate the joint impact of these climate change variables. The main goal of this study was to address the question of how short-term pulses of nutrient inputs, together with vertical mixing and increased UVR fluxes modify the photosynthetic responses of phytoplankton. The experimentation consisted in all pos-sible combinations of the following treatments: (a) solar radi-ation: UVR + PAR (280–700 nm) versus PAR (photosynthet-ically active radiation) alone (400–700 nm); (b) nutrient ad-dition (phosphorus (P) and nitrogen (N)): ambient versus ad-dition (P to reach to a final concentration of 30 µg P L−1, and N to reach N:P molar ratio of 31); and (c) mixing: mixed (one rotation from surface to 3 m depth (speed of 1 m 4 min−1, to-tal of 10 cycles)) versus static. Our findings suggest that un-der ambient nutrient conditions there is a synergistic effect between vertical mixing and UVR, increasing phytoplank-ton photosynthetic inhibition and excretion of organic carbon (EOC) from opaque lakes as compared to algae that received constant mean irradiance within the epilimnion. The opposite occurs in clear lakes where antagonistic effects were deter-mined, with mixing partially counteracting the negative ef-fects of UVR. Nutrient input, mimicking atmospheric pulses from Saharan dust, reversed this effect and clear lakes be-came more inhibited during mixing, while opaque lakes ben-efited from the fluctuating irradiance regime. These climate change related scenarios of nutrient input and increased mix-ing, would not only affect photosynthesis and production in lakes, but might also further influence the microbial loop and trophic interactions via enhanced EOC under fluctuat-ing UVR exposure.
Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina;
Fil: Carrillo, P.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;
Fil: Medina Sanchez, J. M.. Universidad de Granada. Facultad de Ciencias. Departamento de Ecología; España;
Fil: Durán, C.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;
Fil: Herrera, G.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;
Fil: Villar Argaiz, M.. Universidad de Granada. Facultad de Ciencias. Departamento de Ecología; España;
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina;
Materia
VERTICAL MIXING
UVR
LAKES
SPAIN
PHOTOSYNTHETIC RESPONSE
PHYTOPLANKTON
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/1591

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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.Helbling, Eduardo WalterCarrillo, P.Medina Sanchez, J. M.Durán, C.Herrera, G.Villar Argaiz, M.Villafañe, Virginia EstelaVERTICAL MIXINGUVRLAKESSPAINPHOTOSYNTHETIC RESPONSEPHYTOPLANKTONhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Global change, together with human activities, has resulted in increasing amounts of organic material (includ-ing nutrients) that water bodies receive. This input further attenuates the penetration of solar radiation, leading to the view that opaque lakes are more “protected” from solar ul-traviolet radiation (UVR) than clear ones. Vertical mixing, however, complicates this view as cells are exposed to fluc-tuating radiation regimes, for which the effects have, in gen-eral, been neglected. Furthermore, the combined impacts of mixing, together with those of UVR and nutrient inputs are virtually unknown. In this study, we carried out complex in situ experiments in three high mountain lakes of Spain (Lake Enol in the National Park Picos de Europa, Asturias, and lakes Las Yeguas and La Caldera in the National Park Sierra Nevada, Granada), used as model ecosystems to evaluate the joint impact of these climate change variables. The main goal of this study was to address the question of how short-term pulses of nutrient inputs, together with vertical mixing and increased UVR fluxes modify the photosynthetic responses of phytoplankton. The experimentation consisted in all pos-sible combinations of the following treatments: (a) solar radi-ation: UVR + PAR (280–700 nm) versus PAR (photosynthet-ically active radiation) alone (400–700 nm); (b) nutrient ad-dition (phosphorus (P) and nitrogen (N)): ambient versus ad-dition (P to reach to a final concentration of 30 µg P L−1, and N to reach N:P molar ratio of 31); and (c) mixing: mixed (one rotation from surface to 3 m depth (speed of 1 m 4 min−1, to-tal of 10 cycles)) versus static. Our findings suggest that un-der ambient nutrient conditions there is a synergistic effect between vertical mixing and UVR, increasing phytoplank-ton photosynthetic inhibition and excretion of organic carbon (EOC) from opaque lakes as compared to algae that received constant mean irradiance within the epilimnion. The opposite occurs in clear lakes where antagonistic effects were deter-mined, with mixing partially counteracting the negative ef-fects of UVR. Nutrient input, mimicking atmospheric pulses from Saharan dust, reversed this effect and clear lakes be-came more inhibited during mixing, while opaque lakes ben-efited from the fluctuating irradiance regime. These climate change related scenarios of nutrient input and increased mix-ing, would not only affect photosynthesis and production in lakes, but might also further influence the microbial loop and trophic interactions via enhanced EOC under fluctuat-ing UVR exposure.Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina;Fil: Carrillo, P.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;Fil: Medina Sanchez, J. M.. Universidad de Granada. Facultad de Ciencias. Departamento de Ecología; España;Fil: Durán, C.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;Fil: Herrera, G.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;Fil: Villar Argaiz, M.. Universidad de Granada. Facultad de Ciencias. Departamento de Ecología; España;Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina;Copernicus Publications2013-02-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/1591Helbling, Eduardo Walter; Carrillo, P.; Medina Sanchez, J. M.; Durán, C.; Herrera, G.; et al.; Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.; Copernicus Publications; Biogeosciences; 10; 14-2-2013; 1037-10501726-41701726-4189enginfo:eu-repo/semantics/altIdentifier/doi/doi:10.5194/bg-10-1037-2013info:eu-repo/semantics/altIdentifier/url/http://digibug.ugr.es/bitstream/10481/30697/1/Helbling_InteractiveEffects.pdfinfo:eu-repo/semantics/altIdentifier/url/http://www.biogeosciences.net/10/1037/2013/bg-10-1037-2013.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:17Zoai:ri.conicet.gov.ar:11336/1591instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:51:17.703CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
title Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
spellingShingle Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
Helbling, Eduardo Walter
VERTICAL MIXING
UVR
LAKES
SPAIN
PHOTOSYNTHETIC RESPONSE
PHYTOPLANKTON
title_short Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
title_full Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
title_fullStr Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
title_full_unstemmed Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
title_sort Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.
dc.creator.none.fl_str_mv Helbling, Eduardo Walter
Carrillo, P.
Medina Sanchez, J. M.
Durán, C.
Herrera, G.
Villar Argaiz, M.
Villafañe, Virginia Estela
author Helbling, Eduardo Walter
author_facet Helbling, Eduardo Walter
Carrillo, P.
Medina Sanchez, J. M.
Durán, C.
Herrera, G.
Villar Argaiz, M.
Villafañe, Virginia Estela
author_role author
author2 Carrillo, P.
Medina Sanchez, J. M.
Durán, C.
Herrera, G.
Villar Argaiz, M.
Villafañe, Virginia Estela
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv VERTICAL MIXING
UVR
LAKES
SPAIN
PHOTOSYNTHETIC RESPONSE
PHYTOPLANKTON
topic VERTICAL MIXING
UVR
LAKES
SPAIN
PHOTOSYNTHETIC RESPONSE
PHYTOPLANKTON
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Global change, together with human activities, has resulted in increasing amounts of organic material (includ-ing nutrients) that water bodies receive. This input further attenuates the penetration of solar radiation, leading to the view that opaque lakes are more “protected” from solar ul-traviolet radiation (UVR) than clear ones. Vertical mixing, however, complicates this view as cells are exposed to fluc-tuating radiation regimes, for which the effects have, in gen-eral, been neglected. Furthermore, the combined impacts of mixing, together with those of UVR and nutrient inputs are virtually unknown. In this study, we carried out complex in situ experiments in three high mountain lakes of Spain (Lake Enol in the National Park Picos de Europa, Asturias, and lakes Las Yeguas and La Caldera in the National Park Sierra Nevada, Granada), used as model ecosystems to evaluate the joint impact of these climate change variables. The main goal of this study was to address the question of how short-term pulses of nutrient inputs, together with vertical mixing and increased UVR fluxes modify the photosynthetic responses of phytoplankton. The experimentation consisted in all pos-sible combinations of the following treatments: (a) solar radi-ation: UVR + PAR (280–700 nm) versus PAR (photosynthet-ically active radiation) alone (400–700 nm); (b) nutrient ad-dition (phosphorus (P) and nitrogen (N)): ambient versus ad-dition (P to reach to a final concentration of 30 µg P L−1, and N to reach N:P molar ratio of 31); and (c) mixing: mixed (one rotation from surface to 3 m depth (speed of 1 m 4 min−1, to-tal of 10 cycles)) versus static. Our findings suggest that un-der ambient nutrient conditions there is a synergistic effect between vertical mixing and UVR, increasing phytoplank-ton photosynthetic inhibition and excretion of organic carbon (EOC) from opaque lakes as compared to algae that received constant mean irradiance within the epilimnion. The opposite occurs in clear lakes where antagonistic effects were deter-mined, with mixing partially counteracting the negative ef-fects of UVR. Nutrient input, mimicking atmospheric pulses from Saharan dust, reversed this effect and clear lakes be-came more inhibited during mixing, while opaque lakes ben-efited from the fluctuating irradiance regime. These climate change related scenarios of nutrient input and increased mix-ing, would not only affect photosynthesis and production in lakes, but might also further influence the microbial loop and trophic interactions via enhanced EOC under fluctuat-ing UVR exposure.
Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina;
Fil: Carrillo, P.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;
Fil: Medina Sanchez, J. M.. Universidad de Granada. Facultad de Ciencias. Departamento de Ecología; España;
Fil: Durán, C.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;
Fil: Herrera, G.. Universidad de Granada. Instituto Universitario de Investigación del Agua; España;
Fil: Villar Argaiz, M.. Universidad de Granada. Facultad de Ciencias. Departamento de Ecología; España;
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina;
description Global change, together with human activities, has resulted in increasing amounts of organic material (includ-ing nutrients) that water bodies receive. This input further attenuates the penetration of solar radiation, leading to the view that opaque lakes are more “protected” from solar ul-traviolet radiation (UVR) than clear ones. Vertical mixing, however, complicates this view as cells are exposed to fluc-tuating radiation regimes, for which the effects have, in gen-eral, been neglected. Furthermore, the combined impacts of mixing, together with those of UVR and nutrient inputs are virtually unknown. In this study, we carried out complex in situ experiments in three high mountain lakes of Spain (Lake Enol in the National Park Picos de Europa, Asturias, and lakes Las Yeguas and La Caldera in the National Park Sierra Nevada, Granada), used as model ecosystems to evaluate the joint impact of these climate change variables. The main goal of this study was to address the question of how short-term pulses of nutrient inputs, together with vertical mixing and increased UVR fluxes modify the photosynthetic responses of phytoplankton. The experimentation consisted in all pos-sible combinations of the following treatments: (a) solar radi-ation: UVR + PAR (280–700 nm) versus PAR (photosynthet-ically active radiation) alone (400–700 nm); (b) nutrient ad-dition (phosphorus (P) and nitrogen (N)): ambient versus ad-dition (P to reach to a final concentration of 30 µg P L−1, and N to reach N:P molar ratio of 31); and (c) mixing: mixed (one rotation from surface to 3 m depth (speed of 1 m 4 min−1, to-tal of 10 cycles)) versus static. Our findings suggest that un-der ambient nutrient conditions there is a synergistic effect between vertical mixing and UVR, increasing phytoplank-ton photosynthetic inhibition and excretion of organic carbon (EOC) from opaque lakes as compared to algae that received constant mean irradiance within the epilimnion. The opposite occurs in clear lakes where antagonistic effects were deter-mined, with mixing partially counteracting the negative ef-fects of UVR. Nutrient input, mimicking atmospheric pulses from Saharan dust, reversed this effect and clear lakes be-came more inhibited during mixing, while opaque lakes ben-efited from the fluctuating irradiance regime. These climate change related scenarios of nutrient input and increased mix-ing, would not only affect photosynthesis and production in lakes, but might also further influence the microbial loop and trophic interactions via enhanced EOC under fluctuat-ing UVR exposure.
publishDate 2013
dc.date.none.fl_str_mv 2013-02-14
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/1591
Helbling, Eduardo Walter; Carrillo, P.; Medina Sanchez, J. M.; Durán, C.; Herrera, G.; et al.; Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.; Copernicus Publications; Biogeosciences; 10; 14-2-2013; 1037-1050
1726-4170
1726-4189
url http://hdl.handle.net/11336/1591
identifier_str_mv Helbling, Eduardo Walter; Carrillo, P.; Medina Sanchez, J. M.; Durán, C.; Herrera, G.; et al.; Interactive effects of vertical mixing, nutrients and ultraviolet radiation: In situ photosynthetic responses of phytoplankton from high mountain lakes of Southern Europe.; Copernicus Publications; Biogeosciences; 10; 14-2-2013; 1037-1050
1726-4170
1726-4189
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/doi:10.5194/bg-10-1037-2013
info:eu-repo/semantics/altIdentifier/url/http://digibug.ugr.es/bitstream/10481/30697/1/Helbling_InteractiveEffects.pdf
info:eu-repo/semantics/altIdentifier/url/http://www.biogeosciences.net/10/1037/2013/bg-10-1037-2013.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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