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Ecological impact of transhumance on the trophic state of alpine lakes in Gran Paradiso National Park / Rocco Tiberti in Knowledge and management of aquatic ecosystems, 415 (2014) 

Public Citation [article]  inKnowledge and management of aquatic ecosystems > 415 (2014) . - 1-17 Titre : Ecological impact of transhumance on the trophic state of alpine lakes in Gran Paradiso National Park Titre original : L’impact écologique de la transhumance sur l’état trophique des lacs alpins dans le parc national du Grand Paradis Type de document : Imprimé Auteurs : Rocco Tiberti ; Michela Rogora ; Gabriele Tartari ; Cristiana Callieri Année de publication : 2014 Article en page(s) : 1-17 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude [CBNPMP-Thématique] Incidences des activités pastorales [CBNPMP-Géographique] Alpes Résumé : La transhumance, transfert estival du bétail vers les pâturages d’altitude, est une pratique traditionnelle dans les Alpes européennes considérée comme une partie intégrante de l’écosystème de la montagne. Les lacs de montagne sont généralement des systèmes oligotrophes particulièrement sensibles à l’apport de nutriments causé par le bétail. Le but de la présente étude a été de quantifier l’impact du pâturage du bétail sur l’état trophique des lacs d’altitude dans une zone où la transhumance est une pratique traditionnelle (Parc National du Grand Paradis, ouest des Alpes italiennes), en tenant compte de sa double valeur de composante de l’écosystème et de menace potentielle pour l’état trophique des lacs. L’impact du pâturage des troupeaux a été estimé sur les paramètres sensibles liés à l’état trophique des lacs alpins : la transparence de l’eau, la teneur en éléments nutritifs, la charge bactérienne et la concentration en chlorophylle a. La transhumance produit une augmentation significative de l’état trophique des lacs où la pression de pâturage est forte, mais peu ou pas d’effet a été trouvé dans les lacs moins touchés. Même si les lacs très impactés représentent une minorité des lacs étudiés (trois sur vingt), nous avons indiqué les mesures de conservation telles que les clôtures, l’épuration des eaux usées et la mise en défens du bétail à tester dans le parc national du Grand Paradis. Lien pérenne : DOI : 10.1051/kmae/2014030 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150924 Tiberti, Rocco, Rogora, Michela, Tartari, Gabriele, Callieri, Cristiana 2014 Ecological impact of transhumance on the trophic state of alpine lakes in Gran Paradiso National Park = L’impact écologique de la transhumance sur l’état trophique des lacs alpins dans le parc national du Grand Paradis. Knowledge and management of aquatic ecosystems, 415: 1-17.

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Consultable Article (2014) URL

Impact of introduced fish on Common frog (Rana temporaria) close to its altitudinal limit in alpine lakes / Rocco Tiberti in Amphibia-reptilia, 33 (2012) 

Public Citation [article]  inAmphibia-reptilia > 33 (2012) . - 303-307 Titre : Impact of introduced fish on Common frog (Rana temporaria) close to its altitudinal limit in alpine lakes Type de document : Imprimé Auteurs : Rocco Tiberti ; Achaz von Hardenberg Année de publication : 2012 Article en page(s) : 303-307 Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude [CBNPMP-Thématique] Amphibiens [CBNPMP-Thématique] Relations et interactions individus-espèces [CBNPMP-Géographique] Alpes Résumé : Alien fish species have been introduced into naturally fishless mountain lakes worldwide, with negative consequences for native fauna. This study describes the impact of introduced Brook trout (Salvelinus fontinalis) on Common frog (Rana temporaria) in the Gran Paradiso National Park (Western Italian Alps). We conducted an extensive, six years long (2006-2011) monitoring campaign over 12 fishless and 8 stocked lakes, close to the new altitudinal limit of R. temporaria (2811 m a.s.l.). This new altitudinal limit is reported for the first time in this study. The presence of introduced fish was a factor of ecological exclusion, negatively affecting the presence of frogs and compromising the suitability of alpine lakes as breeding sites. These results are likely to depend on larval predation or to selective avoidance of stocked lakes by R. temporaria. Eradication of introduced fish is proposed as a conservation measure to recover amphibian populations in alpine lake ecosystems. Lien pérenne : DOI : 10.1163/156853812X634044 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150918 Tiberti, Rocco, Hardenberg, Achaz von 2012 Impact of introduced fish on Common frog (Rana temporaria) close to its altitudinal limit in alpine lakes. Amphibia-reptilia, 33: 303-307.

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Consultable Article (2012) URL

Scientists' warning of threats to mountains / Dirk S. Schmeller in Science of the total environment, 853 (20 December 2022) 

Public Citation [article]  inScience of the total environment > 853 (20 December 2022) . - 158611 Titre : Scientists' warning of threats to mountains Type de document : Imprimé Auteurs : Dirk S. Schmeller ; Davnah Urbach ; Kieran A. Bates ; Jordi Catalán ; Dan Cogălniceanu ; Matthew C. Fisher ; Jan Friesen ; Leopold Füreder ; Veronika Gaube ; Marilen Haver ; Dean Jacobsen ; Gaël Le Roux (1978-) ; Yu-Pin Lin ; Adeline Loyau ; Oliver Machate ; Andreas Mayer ; Ignacio Palomo ; Christoph Plutzar ; Hugo Sentenac ; Ruben Sommaruga ; Rocco Tiberti ; William Ripple Année de publication : 2022 Article en page(s) : 158611 Langues : Anglais (eng) Catégories : [LOTERRE-Biodiversité] Montagne [LOTERRE-Biodiversité] Changement climatique [LOTERRE-Biodiversité] Relation homme-environnement [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude Résumé : Mountains are an essential component of the global life-support system. They are characterized by a rugged, heterogenous landscape with rapidly changing environmental conditions providing myriad ecological niches over relatively small spatial scales. Although montane species are well adapted to life at extremes, they are highly vulnerable to human derived ecosystem threats. Here we build on the manifesto ‘World Scientists' Warning to Humanity’, issued by the Alliance of World Scientists, to outline the major threats to mountain ecosystems. We highlight climate change as the greatest threat to mountain ecosystems, which are more impacted than their lowland counterparts. We further discuss the cascade of “knock-on” effects of climate change such as increased UV radiation, altered hydrological cycles, and altered pollution profiles; highlighting the biological and socio-economic consequences. Finally, we present how intensified use of mountains leads to overexploitation and abstraction of water, driving changes in carbon stock, reducing biodiversity, and impacting ecosystem functioning. These perturbations can provide opportunities for invasive species, parasites and pathogens to colonize these fragile habitats, driving further changes and losses of micro- and macro-biodiversity, as well further impacting ecosystem services. Ultimately, imbalances in the normal functioning of mountain ecosystems will lead to changes in vital biological, biochemical, and chemical processes, critically reducing ecosystem health with widespread repercussions for animal and human wellbeing. Developing tools in species/habitat conservation and future restoration is therefore essential if we are to effectively mitigate against the declining health of mountains. Lien pérenne : DOI : 10.1016/j.scitotenv.2022.158611 / HAL : hal-03795426v1 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152131 Schmeller, Dirk S., Urbach, Davnah, Bates, Kieran A., Catalán, Jordi, Cogălniceanu, Dan, Fisher, Matthew C., Friesen, Jan, Füreder, Leopold, Gaube, Veronika, Haver, Marilen, Jacobsen, Dean, Le Roux, Gaël (1978-), Lin, Yu-Pin, Loyau, Adeline, Machate, Oliver, Mayer, Andreas, Palomo, Ignacio, Plutzar, Christoph, Sentenac, Hugo, Sommaruga, Ruben, Tiberti, Rocco, Ripple, William 2022 Scientists' warning of threats to mountains. Science of the total environment, 853: 158611.

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Consultable Article (2022) URL

Why should we preserve fishless high mountain lakes? / Marc Ventura (2017) 

Public Citation est un extrait de High mountain conservation in a changing world / Jordi Catalán (2017)  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'altitude Résumé : 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.

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Consultable Chapitre 8 (2017) URL