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Enjeux de conservation des lacs d'altitude |
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Lead and copper speciation in remote mountain lakes / Anja Plöger in Limnology and oceanography, 50 (3) (May 2005)
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Titre : Lead and copper speciation in remote mountain lakes Type de document : Imprimé Auteurs : Anja Plöger ; Eric Fischer ; Hans-Peter Nirmaier ; Luis M. Laglera ; Damiano Monticelli Année de publication : 2005 Article en page(s) : 995-1010 Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Pollution de l'eauRésumé : We determined the chemical speciation of lead and copper in remote mountain and high-latitude lakes at different times of the year, providing background data for regions in Europe least affected by anthropogenic effects. The lakes are characterized by low ionic strength, clear waters, and oligotrophic conditions; are fed predominantly by atmospheric precipitation; and are ice-covered during a large part of the year. Lead—and copper-complexing ligands were determined by cathodic stripping voltammetry with ligand competition using Calcein blue and salicylaldoxime, respectively. Water column averages of the dissolved lead concentrations ranged from 0.2 to 0.9 nmol L−1, with generally lowest levels during the prolonged winter ice cover, whereas dissolved copper concentrations, varying from 1 to 1.7 (±0.1) nmol L−1, showed no significant seasonal variations. The lead speciation was controlled by complexation with ligands at concentrations mostly below 2 nmol L−1, with values for the stability constant (log K’PbL) of 12.5-13.7; calculated 9PbL ionic lead concentrations (-log[Pb2+] values) were 11.9-14.5. Copper complexation was controlled by ligands at concentrations of 12—21 nmol L−1, with values for log K’CuL of 13.5-14.0 and—log[Cu2+] values of 14.4-15.1. The concentration of the copper-binding ligands, but not those for lead, varied seasonally, with about 50% higher concentrations during open water conditions compared to periods of ice cover. The data were consistent with the presence of only one class of ligands for copper and lead. The stability constant of the ligands is similar to that of fulvic acid; however, evidence regarding the actual nature of the ligands is still lacking. The lake data show that (1) competition between calcium and lead causes a reduction in the stability constant of approximately one log-unit for each order of magnitude of Ca2+, and (2) lead scavenging in the lakes is moderated by complexation. Lien pérenne : DOI : 10.4319/lo.2005.50.3.0995 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152116
in Limnology and oceanography > 50 (3) (May 2005) . - 995-1010Plöger, A., Fischer, E., Nirmaier, H.P., Laglera, LM., Monticelli, D. 2005. Lead and copper speciation in remote mountain lakes. Limnology and oceanography, 50(3): 995-1010.Documents numériques
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Article (2005)URL Life+ Limnopirineus : conservation of aquatic habitats and species in high mountains of the pyrenees / Empar Carrillo (2019)
Titre : Life+ Limnopirineus : conservation of aquatic habitats and species in high mountains of the pyrenees Type de document : Électronique Auteurs : Empar Carrillo ; Josep Maria Ninot i Sugrañes (1955-) ; Teresa Buchaca ; Marc Ventura Editeur : Life+ Limnopirineus Année de publication : 2019 Collection : Technical report Importance : 123 p. ISBN/ISSN/EAN : 978-84-18199-17-2 Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Directive Habitat
[CBNPMP-Géographique] PyrénéesPermalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152159 Carrillo, E., Ninot i Sugrañes, J.M., Buchaca, T., Ventura, M. 2019. Life+ Limnopirineus : conservation of aquatic habitats and species in high mountains of the pyrenees. Life+ Limnopirineus, [S.l.]. 123 pp.Documents numériques
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Rapport (2019)Adobe Acrobat PDF Long livestock farming history and human landscape shaping revealed by lake sediment DNA / Charline Giguet-Covex in Nature communications, 5 (2014)
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Titre : Long livestock farming history and human landscape shaping revealed by lake sediment DNA Type de document : Imprimé Auteurs : Charline Giguet-Covex ; Johan Pansu ; Fabien Arnaud ; Pierre-Jérôme Rey ; Christophe Griggo ; Ludovic Gielly ; Isabelle Domaison ; Eric Coissac ; Fernand David ; Philippe Choler ; Jérôme Poulenard ; Pierre Taberlet Année de publication : 2014 Article en page(s) : 3211 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude Résumé : The reconstruction of human-driven, Earth-shaping dynamics is important for understanding past human/environment interactions and for helping human societies that currently face global changes. However, it is often challenging to distinguish the effects of the climate from human activities on environmental changes. Here we evaluate an approach based on DNA metabarcoding used on lake sediments to provide the first high-resolution reconstruction of plant cover and livestock farming history since the Neolithic Period. By comparing these data with a previous reconstruction of erosive event frequency, we show that the most intense erosion period was caused by deforestation and overgrazing by sheep and cowherds during the Late Iron Age and Roman Period. Tracking plants and domestic mammals using lake sediment DNA (lake sedDNA) is a new, promising method for tracing past human practices, and it provides a new outlook of the effects of anthropogenic factors on landscape-scale changes. Lien pérenne : DOI : 10.1038/ncomms4211 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150974
in Nature communications > 5 (2014) . - 3211Giguet-Covex, C., Pansu, J., Arnaud, F., Rey, P.J., Griggo, C., Gielly, L., Domaison, I., Coissac, E., David, F., Choler, P., Poulenard, J., Taberlet, P. 2014. Long livestock farming history and human landscape shaping revealed by lake sediment DNA. Nature communications, 5: 3211.Documents numériques
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Article (2014)URL Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake – impact on macrophyte biodiversity / Marit Mjelde in Annales de Limnologie, 48 (2012)
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Titre : Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake – impact on macrophyte biodiversity Type de document : Imprimé Auteurs : Marit Mjelde ; Paola Lombardo ; Dag Berge ; Stein W. Johansen Année de publication : 2012 Article en page(s) : 225-240 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thèmes] Plantes subspontanées, naturalisées, envahissantesMots-clés : Najas flexilis Résumé : The impact of Elodea canadensis on aquatic macrophyte biodiversity in (Lake) Steinsfjord has been studied through extensive lake-wide surveys and photographic sampling. E. canadensis greatly expanded in Steinsfjord since its appearance in 1978 and still dominated the macrophyte community in 2004. The areal distribution of E. canadensis peaked within 6 years from invasion and has remained relatively stable since; however, stands no longer reach the water surface. E. canadensis significantly increased its depth range, but the cover-weighted mean depth remained unchanged, suggesting that 3–4 m is its optimal depth in Steinsfjord. Species richness has not changed significantly since the earliest survey in 1936–38. However, species composition has changed remarkably, from isoetid dominance in 1936–38 to a diverse community dominated by Najas flexilis in 1979–80 to a less diverse community dominated by E. canadensis in 2004, with Potamogeton berchtoldii and Myriophyllum alterniflorum as lake-wide subdominants. Regardless of their abundance at the onset of the E. canadensis invasion, taxa whose cover-weighted mean depth overlapped with E. canadensis's in 1979–80 greatly reduced their abundance in 2004, shifted to deeper or shallow water or disappeared from sampling stations. Our survey indicates that E. canadensis may be the reason for the decrease of N. flexilis, likely through depletion of CO2 in the water column and reduced nutrients in sediments. The abilities to survive and grow in periodically exposed shallow areas, combined with minor herbivory by waterfowl, are likely important factors for the increase of M. alterniflorum in Steinsfjord's shallow waters. Lien pérenne : DOI : 10.1051/limn/2012016 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150987
in Annales de Limnologie > 48 (2012) . - 225-240Mjelde, M., Lombardo, P., Berge, D., Johansen, SW. 2012. Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake – impact on macrophyte biodiversity. Annales de Limnologie, 48: 225-240.Documents numériques
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Article (2012)URL Microclimate variability in alpine ecosystems as stepping stones for non-native plant establishment above their current elevational limit / Jonas J. Lembrechts in Ecography, 41 (6) (2018)
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Titre : Microclimate variability in alpine ecosystems as stepping stones for non-native plant establishment above their current elevational limit Type de document : Imprimé Auteurs : Jonas J. Lembrechts ; Jonathan Lenoir ; Martin A. Nuñez ; Aníbal Pauchard ; Charly Geron ; Gilles Bussé ; Ann Milbau ; Ivan Nijs Année de publication : 2018 Article en page(s) : 900-909 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Enjeux de conservation des lacs d'altitude Résumé : Alpine environments are currently relatively free from non-native plant species, although their presence and abundance have recently been on the rise. It is however still unclear whether the observed low invasion levels in these areas are due to an inherent resistance of the alpine zone to invasions or whether an exponential increase in invasion is just a matter of time. Using a seed-addition experiment on north- and south-facing slopes (cf. microclimatic gradient) on two mountains in subarctic Sweden, we tested the establishment of six non-native species at an elevation above their current distribution limits and under experimentally enhanced anthropogenic pressures (disturbance, added nutrients and increased propagule pressure). We found a large microclimatic variability in cumulative growing degree days (GDD) (range 500.77°C, SD 120.70°C) due to both physiographic (e.g. aspect) and biophysical (e.g. vegetation cover) features, the latter being altered by the experimental disturbance. Non-native species establishment and biomass production were positively correlated with GDD along the studied microclimatic gradient. However, even though establishment on the north-facing slopes caught up with that on the south-facing slopes throughout the growing season, biomass production was limited on the north-facing slopes due to a shorter growing season. On top of this microclimatic effect, all experimentally imposed anthropogenic factors enhanced non-native species success. The observed microclimatic effect indicates a potential for non-native species to use warm microsites as stepping stones for their establishment towards the cold end of the gradient. Combined with anthropogenic pressures this result suggests an increasing risk for plant invasion in cold ecosystems, as such stepping stones in alpine ecosystems are likely to be more common in a future that will combine a warming climate with persistent anthropogenic pressures. Lien pérenne : DOI : 10.1111/ecog.03263 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150983
in Ecography > 41 (6) (2018) . - 900-909Lembrechts, JJ., Lenoir, J., Nuñez, MA., Pauchard, A., Geron, C., Bussé, G., Milbau, A., Nijs, I. 2018. Microclimate variability in alpine ecosystems as stepping stones for non-native plant establishment above their current elevational limit. Ecography, 41(6): 900-909.Documents numériques
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Article (2018)URL Microplastic contamination in freshwater environments: a review, focusing on interactions with sediments and benthic organisms / Arianna Bellasi in Environments, 7 (4) (2020)
PermalinkMicroplastics in lake mead national recreation area, USA: occurrence and biological uptake / Austin K. Baldwin in PloS ONE, 15 (5) (5/2020)
PermalinkMonographie physique des plans d'eau naturels du département de la Haute-Savoie, France / Jean Sesiano (1993)
PermalinkPermalinkPermalinkNon-native fish introductions and the decline of the mountain yellow-legged frog from within protected areas / Roland A. Knapp in Conservation Biology, 14 (2) (2000)
PermalinkNon-native minnows threaten quillwort populations in high mountain shallow lakes / Esperança Gacia i Passola in Frontiers in plant sience, 9 (2018)
PermalinkNot too small to benefit society: insights into perceived cultural ecosystem services of mountain lakes in the European Alps / Uta Schirpke in Ecology and society, 27 (1) (March 2022)
PermalinkNouveaux aménagements hydro-électriques dans les Pyrénées / Lucien Babonneau in Revue géographique des Pyrénées et du Sud-Ouest, 13 (4) (1942)
PermalinkLes nouveaux lacs des Pyrénées / Axel Gréger in Pyrénées, 284 (12/2020)
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