Détail de l'auteur
Auteur Jordi Catalán |
Documents disponibles écrits par cet auteur (10)
Affiner la rechercheAspectos generales de la limnología invernal de dos lagos pirenaicos morfológicamente muy distintos (estany Redó y estany Baciver) / Enric Ballesteros (1990)
Titre : Aspectos generales de la limnología invernal de dos lagos pirenaicos morfológicamente muy distintos (estany Redó y estany Baciver) Type de document : Tiré à part de revue Auteurs : Enric Ballesteros (1958-) ; Jordi Catalán ; Lluis Camarero ; E. García Année de publication : 1990 Importance : 55-68 Langues : Espagnol (spa) Catégories : [CBNPMP-Géographique] Baciver
[CBNPMP-Géographique] Pyrénées
[CBNPMP-Géographique] Redó
[CBNPMP-Thématique] Communautés hygrophiles (eau dormante)Résumé : El estudio del periodo invemal en dos lagos pirenaicos de caractensticas tróficas y de mineralizaci6n similares, pero morfológicamente muy distintos, ha permitido comparar la influencia de la profundidad y la tasa de renovación del agua sobre algunos aspectos caracteristicos de este periodo: el decrecimiento de la biomasa fitoplanctónica, el consumo de oxigeno, la supervivencia de macrófitos, etc. Las distintas fases de la dinámica de la cubierta (formación del hielo, acumulación y metamorfismo de la nieve, los procesos de inundación y hundimiento, el deshielo) afectaron de distinta manera los procesos bajo el hielo en los dos lagos. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=131063 Ballesteros, Enric (1958-), Catalán, Jordi, Camarero, Lluis, García, E. 1990 Aspectos generales de la limnología invernal de dos lagos pirenaicos morfológicamente muy distintos (estany Redó y estany Baciver). Scientia gerundensis, 16(2) : 55-68.Documents numériques
Consultable
Article (1990)Adobe Acrobat PDFAtmospheric phosphorus deposition may cause lakes to revert from phosphorus limitation back to nitrogen limitation / Lluis Camarero in Nature communications, 3 (2012)
Titre : Atmospheric phosphorus deposition may cause lakes to revert from phosphorus limitation back to nitrogen limitation Type de document : Imprimé Auteurs : Lluis Camarero ; Jordi Catalán Année de publication : 2012 Article en page(s) : 1118 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude Résumé : Recent findings indicate that increased atmospheric deposition of nitrogen of human origin has caused changes in the pattern of ecological nutrient limitation in lakes in the northern hemisphere. An increase in the nitrogen to phosphorus ratio, and hence a shift from pristine nitrogen limitation to human-induced phosphorus limitation of phytoplankton growth, seems to have been driven by deposition of atmospheric nitrogen. These findings challenge the classical paradigm of lake phytoplankton productivity being naturally limited by phosphorus availability. However, atmospheric phosphorus deposition may also be highly relevant. Here we show how dissolved inorganic nitrogen concentration has decreased in the Pyrenean lake district over recent decades, despite there being an increase in deposition of atmospheric nitrogen. This is related to an increased atmospheric phosphorus load in the lake water, as a result of higher atmospheric inputs. These changes are causing phytoplankton to revert from being phosphorus-limited to being nitrogen-limited. Lien pérenne : DOI : 10.1038/ncomms2125 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150956
in Nature communications > 3 (2012) . - 1118Camarero, Lluis, Catalán, Jordi 2012 Atmospheric phosphorus deposition may cause lakes to revert from phosphorus limitation back to nitrogen limitation. Nature communications, 3: 1118.Documents numériques
Consultable
Article (2012)URL
Titre : Attenuation of ultraviolet radiation in mountain lakes: Factors controlling the among- and within-lake variability Type de document : Imprimé Auteurs : Isabelle Laurion ; Marc Ventura ; Jordi Catalán ; Roland Psenner (1950-) ; Ruben Sommaruga Année de publication : 2000 Article en page(s) : 1274-1288 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude Résumé : High-altitude lakes are exposed to high fluence rates of solar ultraviolet radiation (UVR; 29–400 nm) and contain low concentrations of dissolved organic carbon (DOC). While in most lowland lakes, DOC can be used to predict UV transparency with sufficient accuracy, current models fail to estimate UVR in clear alpine lakes. In these lakes, phytoplankton may contribute significantly to the UV attenuation either as particles or as a source of chromophoric dissolved organic matter (CDOM) with distinctive properties. We investigated a series of 26 lakes in the Alps and Pyrenees, situated at elevations ranging from 422 to 2,799 m above sea level and having DOC concentrations ranging from 0.2 to 3.5 mg L−1. CDOM, as measured by the absorptivity of filtered lake water, explained most of the variability in the attenuation of underwater UVR among lakes (r2 = 0.94, P < 0.001). However, within-lake variation in the UV attenuation revealed a significant contribution from phytoplankton in deeper waters (UV attenuation increasing with chlorophyll a concentration; r2 = 0.97, P = 0.002), only apparent when DOC concentrations were low (∼0.3 mg L−1). The DOC-specific absorptivity (ag*) was also important for characterizing the optical conditions in this series of lakes. Epilimnetic values of ag* were significantly lower in lakes located at high elevations (with low allochthonous CDOM inputs from the catchment), compared to lakes surrounded by trees and meadows. Moreover, ag* was generally lower in surface waters than in deeper water layers, suggesting the influence of photobleaching on UV transparency. The slope S of the exponential regression between CDOM absorptivity and wavelength did not show clear patterns, such as found in marine systems, and often presented lower values in the epilimnetic waters (in association with lower ag*). Collectively, our results suggest that in transparent alpine lakes, the dynamics of the CDOM pool and phytoplankton production will have a strong effect on temporal changes in UV underwater attenuation. Lien pérenne : DOI : 10.4319/lo.2000.45.6.1274 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150993
in Limnology and oceanography > 45 (6) (2000) . - 1274-1288Laurion, Isabelle, Ventura, Marc, Catalán, Jordi, Psenner, Roland (1950-), Sommaruga, Ruben 2000 Attenuation of ultraviolet radiation in mountain lakes: Factors controlling the among- and within-lake variability. Limnology and oceanography, 45(6): 1274-1288.Documents numériques
Article (2000)URL
Titre : Ecology under lake ice Type de document : Imprimé Auteurs : Stephanie E. Hampton ; Aaron W. E. Galloway ; Stephen M. Powers ; Ted Ozersky ; Kara H. Woo ; Ryan D. Batt ; Stephanie G. Labou ; Catherine M. O'Reilly ; Sapna Sharma ; Noah R. Lottig ; Emily H. Stanley ; Rebecca L. North ; Jason D. Stockwell ; Rita Adrian ; Gesa A. Weyhenmeyer ; Lauri Arvola ; Helen M. Baulch ; Isabella Bertani ; Larry L., Jr Bowman ; Cayelan C. Carey ; Jordi Catalán ; William Colom-Montero ; Leah M. Domine ; Marisol Felip ; Ignacio Granados ; Corinna Gries ; Hans-Peter Grossart ; Juta Haberman ; Marina Haldna ; Brian Hayden ; Scott N. Higgins ; Jeff C. Jolley ; Kimmo K. Kahilainen ; Enn Kaup ; Michael J. Kehoe ; Sally MacIntyre ; Anson W. Mackay ; Heather L. Mariash ; Robert M. McKay ; Brigitte Nixdorf ; Tiina Nõges ; Michelle Palmer ; Don C. Pierson ; David M. Post ; Matthew J. Pruett ; Milla Rautio ; Jordan S. Read ; Sarah L. Roberts ; Jacqueline Rücker ; Steven A. Sadro ; Eugene A. Silow ; Derek E. Smith ; Robert W. Sterner ; George E. A. Swann ; Maxim A. Timofeyev ; Manuel Toro ; Michael R. Twiss ; Richard J. Vogt ; Erika J. Whiteford ; Marguerite A. Xenopoulos Année de publication : 2017 Article en page(s) : 98-111 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude Résumé : Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer ‘growing seasons’. We executed the first global quantitative synthesis on under-ice lake ecology, including 36 abiotic and biotic variables from 42 research groups and 101 lakes, examining seasonal differences and connections as well as how seasonal differences vary with geophysical factors. Plankton were more abundant under ice than expected; mean winter values were 43.2% of summer values for chlorophyll a, 15.8% of summer phytoplankton biovolume and 25.3% of summer zooplankton density. Dissolved nitrogen concentrations were typically higher during winter, and these differences were exaggerated in smaller lakes. Lake size also influenced winter-summer patterns for dissolved organic carbon (DOC), with higher winter DOC in smaller lakes. At coarse levels of taxonomic aggregation, phytoplankton and zooplankton community composition showed few systematic differences between seasons, although literature suggests that seasonal differences are frequently lake-specific, species-specific, or occur at the level of functional group. Within the subset of lakes that had longer time series, winter influenced the subsequent summer for some nutrient variables and zooplankton biomass. Lien pérenne : DOI : 10.1111/ele.12699 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150982
in Ecology Letters > 20 (2017) . - 98-111Hampton, Stephanie E., Galloway, Aaron W. E., Powers, Stephen M., Ozersky, Ted, Woo, Kara H., Batt, Ryan D., Labou, Stephanie G., O'Reilly, Catherine M., Sharma, Sapna, Lottig, Noah R., Stanley, Emily H., North, Rebecca L., Stockwell, Jason D., Adrian, Rita, Weyhenmeyer, Gesa A., Arvola, Lauri, Baulch, Helen M., Bertani, Isabella, Bowman, Larry L., Jr, Carey, Cayelan C., Catalán, Jordi, Colom-Montero, William, Domine, Leah M., Felip, Marisol, Granados, Ignacio, Gries, Corinna, Grossart, Hans-Peter, Haberman, Juta, Haldna, Marina, Hayden, Brian, Higgins, Scott N., Jolley, Jeff C., Kahilainen, Kimmo K., Kaup, Enn, Kehoe, Michael J., MacIntyre, Sally, Mackay, Anson W., Mariash, Heather L., McKay, Robert M., Nixdorf, Brigitte, Nõges, Tiina, Palmer, Michelle, Pierson, Don C., Post, David M., Pruett, Matthew J., Rautio, Milla, Read, Jordan S., Roberts, Sarah L., Rücker, Jacqueline, Sadro, Steven A., Silow, Eugene A., Smith, Derek E., Sterner, Robert W., Swann, George E. A., Timofeyev, Maxim A., Toro, Manuel, Twiss, Michael R., Vogt, Richard J., Whiteford, Erika J., Xenopoulos, Marguerite A. 2017 Ecology under lake ice. Ecology Letters, 20: 98-111.Documents numériques
Article (2017)URL
est un extrait de Le changement climatique dans les Pyrénées : impact, vulnérabilités et adaptation : bases de connaissances pour la future stratégie d'adaptation au changement climatique dans les Pyrénées / Observatoire pyrénéen du changement climatique (OPCC) (2018)
Titre : Écosystèmes sensibles de haute montagne: lacs et tourbières Type de document : Extrait d'ouvrage Auteurs : Blas Valero Garcés ; David Amouroux ; Laure Gandois ; Didier Galop ; Gaël Le Roux (1978-) ; Lluis Camarero ; Jordi Catalán ; Jesus Miguel Santamaria ; David Elustondo ; Alberto de Diego ; Ana Moreno ; Fernando Barreiro-Lostres ; Pablo Corella ; Penélope González-Sampériz ; Ana Avila Castells ; Olaia Liñero ; Felip Marisol Année de publication : 2018 Importance : 58-65 Catégories : [CBNPMP-Thématique] Conservation et gestion des espaces
[CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thématique] Lac d'altitude
[CBNPMP-Thématique] Tourbières hautes actives, végétation bord de lacs et rivières, marais, tourbières et sourcesRésumé : Les lacs et les tourbières de haute montagne sont des éléments emblématiques des paysages pyrénéens. Ils sont très vulnérables aux changements climatiques et à l’augmentation des pressions humaines. Depuis des millénaires, ils jouent un rôle essentiel de maintien de la biodiversité, contribuent au stockage de carbone, constituent des ressources en eau. Ces zones humides ont constitué des lieux nécessaires pour l’activité pastorale et plus récemment, elles sont devenues des ressources touristiques. Leur conservation dans le cadre d’un développement durable des montagnes est un défi et une occasion de sensibiliser le public aux effets du changement global sur ces territoires considérés à tort comme vierges de tout impact humain. Lien pérenne : HAL : hal-02461479 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=151758 Valero Garcés, Blas, Amouroux, David, Gandois, Laure, Galop, Didier, Le Roux, Gaël (1978-), Camarero, Lluis, Catalán, Jordi, Santamaria, Jesus Miguel, Elustondo, David, Diego, Alberto de, Moreno, Ana, Barreiro-Lostres, Fernando, Corella, Pablo, González-Sampériz, Penélope, Avila Castells, Ana, Liñero, Olaia, Marisol, Felip 2018 Écosystèmes sensibles de haute montagne: lacs et tourbières. In: Le changement climatique dans les Pyrénées : impact, vulnérabilités et adaptation : bases de connaissances pour la future stratégie d'adaptation au changement climatique dans les Pyrénées. : 58-65.Documents numériques
Consultable
Chapitre 2.5 (2018)URLHigh mountain lakes and atmospherically transported pollutants / Richard William Battarbee (2005)
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