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The effect of increased water level on Isoetes lacustris L. in lake Baciver, Spain / Esperança Gacia i Passola (1996)
Titre : The effect of increased water level on Isoetes lacustris L. in lake Baciver, Spain Type de document : Tiré à part de revue Auteurs : Esperança Gacia i Passola ; Enric Ballesteros (1958-) Année de publication : 1996 Importance : 57-59 Langues : Anglais (eng) Catégories : [CBNPMP-Géographique] Baciver
[CBNPMP-Géographique] Pyrénées
[CBNPMP-Thèmes] Communautés hygrophiles (eau dormante)
[CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Lac d'altitude
[CBNPMP-Thèmes] Monitoring, suivi
[CBNPMP-Thèmes] Neige
[CBNPMP-Thèmes] Rôle de la lumière en physiologie végétale
[CBNPMP-Thèmes] SemisMots-clés : Isoetes lacustris L. Résumé : Ten months after flooding lake Baciver, water levels were 5.5 m higher than the previous normal and the area formally occupied by the Isoetes population was reduced. All Isoetes originally present below 0.6 m died, and only plants standing between 5.8 and 6.1 m (new depth) survived. As irradiance decreased, remaining individuals produced fewer leaves, but their biomass production was higher, as leaf length increased in response to the diminished available irradiance. Because leaf mortality was excessive, regeneration capacity, popula- tion performance and dynamics were adversely affected. In 1992, no new production occurred in Isoetes lacustris individu- als surviving after the winter. We suggest that low surface oxy- gen levels at the water column under the ice, and total anoxia below 6 m depth, caused the demise of the I. lacustris population in Lake Baciver. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=131061 Gacia i Passola, E., Ballesteros, E. 1996. The effect of increased water level on Isoetes lacustris L. in lake Baciver, Spain. Journal of Aquatic Plant Management, 34 : 57-59.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 12937 Ballesteros Tiré à part Centre de documentation Tirés à part Consultable Documents numériques
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Article (1996)Adobe Acrobat PDF The effect of increased water level on Isoëtes lacustris L. in Lake Baciver, Spain / Esperança Gacia i Passola in Journal of Aquatic Plant Management, 34 (1996)
[article]
Titre : The effect of increased water level on Isoëtes lacustris L. in Lake Baciver, Spain Type de document : Imprimé Auteurs : Esperança Gacia i Passola ; Enric Ballesteros (1958-) Année de publication : 1996 Article en page(s) : 57-59 Langues : Anglais (eng) Catégories : [CBNPMP-Géographique] Baciver
[CBNPMP-Géographique] Pyrénées
[CBNPMP-Thèmes] Communautés hygrophiles (eau dormante)
[CBNPMP-Thèmes] Eaux douces
[CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Lac d'altitude
[CBNPMP-Thèmes] Monitoring, suivi
[CBNPMP-Thèmes] Neige
[CBNPMP-Thèmes] Rôle de la lumière en physiologie végétale
[CBNPMP-Thèmes] SemisMots-clés : Isoëtes lacustris L. Résumé : Ten months after flooding lake Baciver, water levels were 5.5 m higher than the previous normal and the area formally occupied by the Isoetes population was reduced. All Isoetes originally present below 0.6 m died, and only plants standing between 5.8 and 6.1 m (new depth) survived. As irradiance decreased, remaining individuals produced fewer leaves, but their biomass production was higher, as leaf length increased in response to the diminished available irradiance. Because leaf mortality was excessive, regeneration capacity, popula- tion performance and dynamics were adversely affected. In 1992, no new production occurred in Isoetes lacustris individu- als surviving after the winter. We suggest that low surface oxy- gen levels at the water column under the ice, and total anoxia below 6 m depth, caused the demise of the I. lacustris population in Lake Baciver. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141551
in Journal of Aquatic Plant Management > 34 (1996) . - 57-59Gacia i Passola, E., Ballesteros, E. 1996. The effect of increased water level on Isoëtes lacustris L. in Lake Baciver, Spain. Journal of Aquatic Plant Management, 34: 57-59.Documents numériques
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article (1996)URL The Lake Biotic Index (LBI): an applied method for assessing the biological quality of lakes using macrobenthos; the Lake Châlain (French Jura) as an example / Valérie Verneaux in Annales de Limnologie, 40 (1) (March 2004)
[article]
Titre : The Lake Biotic Index (LBI): an applied method for assessing the biological quality of lakes using macrobenthos; the Lake Châlain (French Jura) as an example Type de document : Imprimé Auteurs : Valérie Verneaux ; Jean Verneaux ; A. Schmitt ; Christiane Lovy ; Jean-Claude Lambert Année de publication : 2004 Article en page(s) : 1-9 Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Géographique] Jura (France)Résumé : The paper proposes a new biological method for assessing the quality of lakes. It is based on the comparison of littoral and profundal macroinvertebrate communities sampled in soft sediments. Two depths were sampled: one at the littoral zone (Zl = 2m) to define a littoral index (Bl ) related to the biogenic potential of the lake (quantitative data), the other at the deep zone (Zf = 0.66 Zmax) to define a taxonomic deficit index (Df ) connected with the quality of the water-sediment interface in deep zone (qualitative data). These two indexes were combined in a Lake Biotic Index (LBI), with a range from 0 to 20, which gives an evaluation of the biogenic capacity of a lake to the development of macroconsumer communities. Using the Bl and Df values any lake can be plotted on a typological graph which is helpfull to characterize lakes both quantitatively (oligo- to polybiotic) and qualitatively (eu- to dysbiotic). Lake Châlain (French Jura) is presented as an example of the method application with its macrofauna and the index calculation. Then, this lake was included in the typological graph with nine other French lakes studied using the same method. Each lake, characterized by its Bl, Df and LBI values, can be compared to the others in a typological scheme. The proposed indexes are discussed and bases for interpretation of the results are presented. The proposed classification of lakes gives an evaluation of their biogenic capacity concerning macroconsumers and can be usefully compared with other classifications, especially with trophic and sediment types, in functional studies as well as in lake diagnosis, in the context of the Water Framework Directive (Directive 2000/60/CE). Lien pérenne : DOI : 10.1051/limn/2004003 / HAL : hal-01721251 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150914
in Annales de Limnologie > 40 (1) (March 2004) . - 1-9Verneaux, V., Verneaux, J., Schmitt, A., Lovy, C., Lambert, J.C. 2004. The Lake Biotic Index (LBI): an applied method for assessing the biological quality of lakes using macrobenthos; the Lake Châlain (French Jura) as an example. Annales de Limnologie, 40(1): 1-9.Documents numériques
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Article (2004)URL
Titre : Towards a microbial conservation perspective in high mountain lakes Type de document : Extrait d'ouvrage Auteurs : Emilio O Casamayor Editeur : Springer Année de publication : 2017 Collection : Advances in global change research num. 62 Importance : 157-180 Catégories : [CBNPMP-Thèmes] Biodiversité
[CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Lac d'altitudeRésumé : Microorganisms are fundamental components to maintain the ecological integrity of any ecosystem. Microscopic organisms have been, however, mostly excluded in conservation studies and microbiology has been developed as a scientific discipline lacking a natural history background. The detailed genetic studies carried out in the Aigüestortes i Estany de Sant Maurici National Park and recent works in the mostly scarce literature, show that the mostly oligotrophic and highly diluted waters in high mountain lakes hold a larger microbial phylogenetic uniqueness than expected and are reservoirs of large evolutionary potential, providing an overall natural history perspective for alpine archaea, bacteria, fungi and protists. Microbes arise as an important part of the biological richness of these environments that should be considered as a fundamental component of the natural heritage. Microbial ecologists are now closer than ever to deal with conservation biology concepts such as biological richness, extinction, biotic interactions, and ecosystems management. First insights emerge for establishing the microbial tolerance to different environmental conditions, for estimating which is the potentiality of survival and dispersal abilities in the different species, and for highlighting how the underappreciated microbiota will respond to stresses and disturbances brought by the global change. Warming and eutrophication may jeopardise the most idiosyncratic microbial populations that have found in these (ultra)oligotrophic and diluted systems the most appropriate conditions to thrive. Environmental managers and lawyers, citizen, and stakeholders, in general, have now access to scientifically informed advice for the unseen microbial life in the unexpectedly rich high mountain microbial ecosystems. Lien pérenne : DOI : 10.1007/978-3-319-55982-7_7 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150766 Casamayor, E.O. 2017. Towards a microbial conservation perspective in high mountain lakes. In: High mountain conservation in a changing world. Springer, [S.l.]: 157-180.Documents numériques
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Chapitre 7 (2017)URL
[article]
Titre : Transfer of marine mercury to mountain lakes Type de document : Imprimé Auteurs : Sophia V. Hansson (1981-) ; Jeroen Sonke ; Didier Galop ; Gilles Bareille ; Séverine Jean (1975-) ; Gaël Le Roux (1978-) Année de publication : 2017 Article en page(s) : 12719 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Pollution de l'eauRésumé : Stocking is a worldwide activity on geographical and historical scales. The rate of non-native fish introductions have more than doubled over the last decades yet the effect on natural ecosystems, in the scope of biologically mediated transport and biomagnification of Hg and Hg-isotopes, is unknown. Using geochemistry (THg) and stable isotopes (N, Sr and Hg), we evaluate natal origin and trophic position of brown trout (Salmo trutta fario), as well as mercury biomagnification trends and potential pollution sources to three high-altitude lakes. Farmed trout show Hg-isotope signatures similar to marine biota whereas wild trout shows Hg-isotope signatures typical of fresh water lakes. Stocked trout initially show Hg-isotope signatures similar to marine biota. As the stocked trout age and shifts diet to a higher trophic level, THg concentrations increase and the marine Hg isotope signatures, induced via farm fish feed, shift to locally produced MeHg with lower δ202Hg and higher Δ199Hg. We conclude that stocking acts a humanly induced biovector that transfers marine Hg to freshwater ecosystems, which is seen in the Hg-isotopic signature up to five years after stocking events occurred. This points to the need of further investigations of the role of stocking in MeHg exposure to freshwater ecosystems. Lien pérenne : DOI : 10.1038/s41598-017-13001-2 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150824
in Scientific reports > 7 (2017) . - 12719Hansson, SV., Sonke, J., Galop, D., Bareille, G., Jean, S., Le Roux, G. 2017. Transfer of marine mercury to mountain lakes. Scientific reports, 7: 12719.Documents numériques
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Article (2017)URL Transferts des polluants organiques persistants de l’atmosphère aux milieux aquatiques de montagne / Johanna Marçais (2017)
PermalinkTransmission of Ranavirus between Ectothermic Vertebrate Hosts / Roberto Brenes in PloS ONE, 9 (3) (2014)
PermalinkLa végétation du massif du Néouvielle (Hautes-Pyrénées) et de la chaîne frontière du sud de la vallée d'Aure (2e note préliminaire) / Pierre Chouard in Bulletin de la Société botanique de France, 73 (1926)
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