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Auteur Teresa Buchaca |
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est un extrait de Life+ Limnopirineus : conservation of aquatic habitats and species in high mountains of the pyrenees / Empar Carrillo (2019)
Titre : Changes in lakes after the reduction of fish densities Type de document : Extrait d'ouvrage Auteurs : Teresa Buchaca ; Ibor Sabás ; Victor Osorio ; Quim Pou-Rovira ; Alexandre Miró ; Mariàngels Puig ; Eloi Cruset ; Blanca Font ; Enric Ballesteros (1958-) ; Federica Lucati ; Jongmo Suh ; Marc Ventura Année de publication : 2019 Importance : 29-40 Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude Résumé : In this study we analyse the time series of monitoring data for the 5 years of the LimnoPirineus project. The results show that the group with the clearest response to fish eradication are the macroinvertebrates of the littoral zone, with an increase in taxon richness over time and a convergence of macroinvertebrate composition to that of natural lakes. The change in the biomass of periphytic algae is less affected and only occurs where minnow alone were present or where they were accompanied by salmonid species. In the pelagic system, lakes where minnow were the only fish species present showed an increase in the abundance of pelagic crustaceans and a decrease in phytoplankton biomass after eradication. All these changes and those of physical-chemical parameters (water transparency and nutrients) did not, however, seem to clearly affect the composition of phytoplankton or periphytic algae in the lakes studied. Lien pérenne : Handle : 10261/226771 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152160 Buchaca, Teresa, Sabás, Ibor, Osorio, Victor, Pou-Rovira, Quim, Miró, Alexandre, Puig, Mariàngels, Cruset, Eloi, Font, Blanca, Ballesteros, Enric (1958-), Lucati, Federica, Suh, Jongmo, Ventura, Marc 2019 Changes in lakes after the reduction of fish densities. In: Life+ Limnopirineus : conservation of aquatic habitats and species in high mountains of the pyrenees. Life+ Limnopirineus, [S.l.]: 29-40.Documents numériques
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Chapitre (2019)URLHigh mountain lakes: extreme habitats and witnesses of environmental changes / Jordi Catalán in Limnética, 25 (1-2) (June 2006)
Titre : High mountain lakes: extreme habitats and witnesses of environmental changes Type de document : Imprimé Auteurs : Jordi Catalán ; Lluis Camarero ; Marisol Felip ; Sergi Pla ; Marc Ventura ; Teresa Buchaca ; Frederic Bartumeus ; Guillermo de Mendoza ; Alexandre Miró ; Emilio O Casamayor ; Juan Manuel Medina-Sánchez ; Montserrat Bacardit ; Maddi Altuna ; Mireia Bartrons ; Daniel Díaz de Quijano Année de publication : 2006 Article en page(s) : 35 Langues : Français (fre) Catégories : [LOTERRE-Biodiversité] Changement climatique
[CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thématique] Lac d'altitudeRésumé : High mountain lakes offer research opportunities beyond what could be expected from their quantitative relevance in the Earth system. In this article we present a brief summary of the research carried out in the lakes of the Pyrenees in the last twenty years by the group of limnology of the Centre for High Mountain Research (CRAM) of the University of Barcelona. The studies can be included in three main topics: life in extreme conditions, catchment-lake relationships and environmental changes. Lien pérenne : DOI : 10.23818/limn.25.38 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147856
in Limnética > 25 (1-2) (June 2006) . - 35Catalán, Jordi, Camarero, Lluis, Felip, Marisol, Pla, Sergi, Ventura, Marc, Buchaca, Teresa, Bartumeus, Frederic, Mendoza, Guillermo de, Miró, Alexandre, Casamayor, Emilio O, Medina-Sánchez, Juan Manuel, Bacardit, Montserrat, Altuna, Maddi, Bartrons, Mireia, de Quijano, Daniel Díaz 2006 High mountain lakes: extreme habitats and witnesses of environmental changes. Limnética, 25(1-2): 35.Documents numériques
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Article (2006)URLLife+ 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-Thématique] Enjeux de conservation des lacs d'altitude
[CBNPMP-Thématique] Directive Habitat
[CBNPMP-Géographique] PyrénéesPermalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152159 Carrillo, Empar, Ninot i Sugrañes, Josep Maria (1955-), Buchaca, Teresa, Ventura, Marc , 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
Titre : Non-native minnows threaten quillwort populations in high mountain shallow lakes Type de document : Imprimé Auteurs : Esperança Gacia i Passola ; Teresa Buchaca ; Nayeli Bernal-Mendoza ; Ibor Sabás ; Enric Ballesteros (1958-) ; Marc Ventura Année de publication : 2018 Article en page(s) : 329 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude Résumé : Submersed aquatic plants are a key component of shallow, clear water lakes contributing to primary production and water quality. High mountain lakes are naturally fishless although invasive trout and most recently minnows have been introduced causing a major impact on fauna richness. The Pyrenean high mountain range has preserved soft-water oligotrophic boreal isoetids in their southern limit of distribution but the recent fish introduction is a potential factor of stress that needs to be addressed. We here work under the hypothesis that due to contrasting ecological features, trout will not be heavily affecting quillwort populations while minnows will have a stronger effect on zooplankton and zoobenthos that will promote algal growth and reduce light availability for the underwater meadows. Ten Pyrenean shallow lakes representative of three scenarios -fishless, with trout and with minnows-, were sampled for meadow structure, water column and benthic environment characterization in mid-summer 2015 and 2016. Quillwort biomass allocation (above vs. belowground), epiphytic load, and composition of the algal community (abundant cyanobacteria) differed in the presence of minnows. In trout lakes biomass allocation and epiphytic load were average and the algal community composed by chlorophytes and diatoms as in fishless lakes. Biomass ratio was close to thresholds of negative buoyancy in minnow lakes indicating that meadows were at risk of uprooting and consequent de-vegetation. Total and soluble carbohydrates were lower and the sporangia contained significantly less reserves to constrain growth and expansion in the presence of minnows. Lake scenarios were coupled to physicochemical differences with low light, high phosphorus and Chl-a (mesotrophia) in minnow lakes, while trout and fishless lakes remained oligotrophic. This is the first study assessing the impact of non-native fish on soft-water isoetids from mountain lakes and shows that minnows are a major threat to quillworts. The impaired light environment (from epiphytic algal overgrow and water column Chl-a) entails consequent regression (i.e., no recruitment) and de-vegetation (uprooting) of the meadows. Since soft-water oligotrophic mountain lakes are protected under the Habitats Directive, some action needs to be urgently implemented not only to preserve quillworts but to the overall ecological integrity of the lakes. Lien pérenne : DOI : 10.3389/fpls.2018.00329 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150972
in Frontiers in plant sience > 9 (2018) . - 329Gacia i Passola, Esperança, Buchaca, Teresa, Bernal-Mendoza, Nayeli, Sabás, Ibor, Ballesteros, Enric (1958-), Ventura, Marc 2018 Non-native minnows threaten quillwort populations in high mountain shallow lakes. Frontiers in plant sience, 9: 329.Documents numériques
Article (2018)URL
Titre : Why should we preserve fishless high mountain lakes? Type de document : Extrait d'ouvrage Auteurs : Marc Ventura ; Rocco Tiberti ; Teresa Buchaca ; Danilo Buñay ; Ibor Sabás ; Alexandre Miró Editeur : Springer Année de publication : 2017 Collection : Advances in global change research num. 62 Importance : 181-205 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Lac d'altitude
[CBNPMP-Thématique] Enjeux de conservation des lacs d'altitudeRésumé : High mountain lakes are originally fishless, although many have had introductions of non-native fish species, predominantly trout, and recently also minnows introduced by fishermen that use them as live bait. The extent of these introductions is general and substantial often involving many lakes over mountain ranges. Predation on native fauna by introduced fish involves profound ecological changes since fish occupy a higher trophic level that was previously inexistent. Fish predation produces a drastic reduction or elimination of autochthonous animal groups, such as amphibians and large macroinvertebrates in the littoral, and crustaceans in the plankton. These strong effects raise concerns for the conservation of high mountain lakes. In terms of individual species, those adapted to live in larger lakes have suffered a higher decrease in the size of their metapopulation. This ecological problem is discussed from a European perspective providing examples from two study areas: the Pyrenees and the Western Italian Alps. Species-specific studies are urgently needed to evaluate the conservation status of the more impacted species, together with conservation measures at continental and regional scales, through regulation, and at local scale, through restoration actions, aimed to stop further invasive species expansions and to restore the present situation. At different high mountain areas of the world, there have been restoration projects aiming to return lakes to their native fish-free status. In these areas autochthonous species that disappeared with the introduction of fish are progressively recovering their initial distribution when nearby fish-free lakes and ponds are available. Lien pérenne : DOI : 10.1007/978-3-319-55982-7_8 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148572 Ventura, Marc, Tiberti, Rocco, Buchaca, Teresa, Buñay, Danilo, Sabás, Ibor, Miró, Alexandre 2017 Why should we preserve fishless high mountain lakes? In: High mountain conservation in a changing world. Springer, [S.l.]: 181-205.Documents numériques
Chapitre 8 (2017)URL
