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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/1591
Ver los metadatos del registro completo
id |
CONICETDig_2e09163fd508128bd00b6c237fe2116c |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/1591 |
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 |
_version_ |
1844613577708666880 |
score |
13.070432 |