Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins

This study aimed to strengthen the knowledge of Didymosphenia geminata distribution in Spain, and to determine which environmental variables were related to its regional distribution and temporal changes in growth and production in two Ebro River tributary basins (Iregua and Najerilla¸ La Rioja Regi...

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Autores: Ladrera, Rubén, Gomà Martínez, Joan, Prat i Fornells, Narcís
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/107474
Acesso em linha:https://hdl.handle.net/2445/107474
Access Level:acceso abierto
Palavra-chave:Diatomees
Ebre (Espanya : Curs d'aigua)
Diatoms
Ebro River (Spain)
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spelling Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basinsLadrera, RubénGomà Martínez, JoanPrat i Fornells, NarcísDiatomeesEbre (Espanya : Curs d'aigua)DiatomsEbro River (Spain)This study aimed to strengthen the knowledge of Didymosphenia geminata distribution in Spain, and to determine which environmental variables were related to its regional distribution and temporal changes in growth and production in two Ebro River tributary basins (Iregua and Najerilla¸ La Rioja Region). Living cells of D. geminata were present in 40% of the studied sites of both basins but only four of the sites developed massive growths. The diatom is widely distributed only in mountain areas of both basins (above 690 masl), which have low average annual air temperature (8.27 ± 0.28 ºC) and low water Soluble Reactive Phosphorus (SRP) concentration (average value 0.024 ± 0.007 ppm). Massive growths occur in sites with high light intensity, hydrological regulation of river flow and the lowest measured SRP concentrations (below 0.018 ppm SRP). We carried out an intensive spatio-temporal survey in the Lumbreras River (Iregua basin), where the first massive growth was detected in La Rioja Region. The highest cell densities (1.6 × 105 cells cm−2) and biomass values (480 gDWm−2) were recorded in late summer. An increase in solar radiation and slight rise in water temperature were associated with an increase in biomass over time, but always in waters with low SRP concentration, the key factor that enhances massive growth development. The alteration of the natural streamflow in the Lumbreras River by the Pajares Reservoir and the fact that water is discharged from the hypolimnion (which decreases the summer river water temperature) are important factors in understanding why D. geminata shows such an increase in biomass in a Mediterranean river. This paper provides new insights into the importance of different factors controlling D. geminata massive proliferations in the Mediterranean climate zone, where it is assumed that the species should not develop such massive growths, compared to temperate zones where the majority of previous studies have been carried out. We suggest that changing the reservoir management strategy would be a very important contribution to the control of such significant developments.Regional Euro-Asian Biological Invasions Centre2017201720162017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion13 p.application/pdfhttps://hdl.handle.net/2445/107474Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3391/ai.2016.11.4.02Aquatic Invasions, 2016, vol. 11, num. 4, p. 355-367https://doi.org/10.3391/ai.2016.11.4.02cc-by (c) Ladrera, Rubén et al., 2016http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1074742026-05-29T05:05:01Z
dc.title.none.fl_str_mv Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
title Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
spellingShingle Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
Ladrera, Rubén
Diatomees
Ebre (Espanya : Curs d'aigua)
Diatoms
Ebro River (Spain)
title_short Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
title_full Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
title_fullStr Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
title_full_unstemmed Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
title_sort Regional distribution and temporal changes in density and biomass of Didymosphenia geminata in two Mediterranean river basins
dc.creator.none.fl_str_mv Ladrera, Rubén
Gomà Martínez, Joan
Prat i Fornells, Narcís
author Ladrera, Rubén
author_facet Ladrera, Rubén
Gomà Martínez, Joan
Prat i Fornells, Narcís
author_role author
author2 Gomà Martínez, Joan
Prat i Fornells, Narcís
author2_role author
author
dc.subject.none.fl_str_mv Diatomees
Ebre (Espanya : Curs d'aigua)
Diatoms
Ebro River (Spain)
topic Diatomees
Ebre (Espanya : Curs d'aigua)
Diatoms
Ebro River (Spain)
description This study aimed to strengthen the knowledge of Didymosphenia geminata distribution in Spain, and to determine which environmental variables were related to its regional distribution and temporal changes in growth and production in two Ebro River tributary basins (Iregua and Najerilla¸ La Rioja Region). Living cells of D. geminata were present in 40% of the studied sites of both basins but only four of the sites developed massive growths. The diatom is widely distributed only in mountain areas of both basins (above 690 masl), which have low average annual air temperature (8.27 ± 0.28 ºC) and low water Soluble Reactive Phosphorus (SRP) concentration (average value 0.024 ± 0.007 ppm). Massive growths occur in sites with high light intensity, hydrological regulation of river flow and the lowest measured SRP concentrations (below 0.018 ppm SRP). We carried out an intensive spatio-temporal survey in the Lumbreras River (Iregua basin), where the first massive growth was detected in La Rioja Region. The highest cell densities (1.6 × 105 cells cm−2) and biomass values (480 gDWm−2) were recorded in late summer. An increase in solar radiation and slight rise in water temperature were associated with an increase in biomass over time, but always in waters with low SRP concentration, the key factor that enhances massive growth development. The alteration of the natural streamflow in the Lumbreras River by the Pajares Reservoir and the fact that water is discharged from the hypolimnion (which decreases the summer river water temperature) are important factors in understanding why D. geminata shows such an increase in biomass in a Mediterranean river. This paper provides new insights into the importance of different factors controlling D. geminata massive proliferations in the Mediterranean climate zone, where it is assumed that the species should not develop such massive growths, compared to temperate zones where the majority of previous studies have been carried out. We suggest that changing the reservoir management strategy would be a very important contribution to the control of such significant developments.
publishDate 2016
dc.date.none.fl_str_mv 2016
2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/107474
url https://hdl.handle.net/2445/107474
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3391/ai.2016.11.4.02
Aquatic Invasions, 2016, vol. 11, num. 4, p. 355-367
https://doi.org/10.3391/ai.2016.11.4.02
dc.rights.none.fl_str_mv cc-by (c) Ladrera, Rubén et al., 2016
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Ladrera, Rubén et al., 2016
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 13 p.
application/pdf
dc.publisher.none.fl_str_mv Regional Euro-Asian Biological Invasions Centre
publisher.none.fl_str_mv Regional Euro-Asian Biological Invasions Centre
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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