Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Ecological impact of transhumance on the trophic state of alpine lakes in Gran Paradiso National Park |
| Abstract | Transhumance - the summer transfer of livestock to highland pastures is a traditional practice in the European Alps and is considered an integral part of the mountain ecosystem. Mountain lakes are generally oligotrophic systems and are particularly sensitive to the nutrient input caused by livestock. The aim of the present study was to quantify the impact of livestock grazing on the trophic state of high-altitude lakes in an area where transhumance is a traditional practice (Gran Paradiso National Park, Western Italian Alps), taking into account its dual value of ecosystem component and potential threat to lakes' trophic status. The impact of flocks and herds grazing was estimated on sensitive parameters related to the trophic state of alpine lakes: water transparency, nutrient content, bacterial load and chlorophyll-a concentration. Transhumance produced a significant increase in the trophic state of lakes with high grazing pressure, but little or no effect was found at soft-impacted lakes. Even though heavy-impacted lakes represent a minority of the studied lakes (three out of twenty), we indicated conservation measures such as fencing, wastewater treatment and livestock exclosure to be tested in Gran Paradiso National Park. |
| Source | Knowledge and management of aquatic ecosystems (415), pp. 5 |
| Keywords | livestock grazingGran ParadisoNational ParkAlpsconservation measures |
| Journal | Knowledge and management of aquatic ecosystems |
| Editor | EDP sciences, Les Ulis, Francia |
| Year | 2014 |
| Type | Articolo in rivista |
| DOI | 10.1051/kmae/2014030 |
| Authors | Rocco Tiberti; Michela Rogora; Gabriele Tartari; Cristiana Callieri |
| Text | 328847 2014 10.1051/kmae/2014030 ISI Web of Science WOS 000347554600005 Scopus 2 s2.0 84908691643 livestock grazing Gran Paradiso National Park Alps conservation measures Ecological impact of transhumance on the trophic state of alpine lakes in Gran Paradiso National Park Rocco Tiberti; Michela Rogora; Gabriele Tartari; Cristiana Callieri Alpine Wildlife Res Ctr; Univ Pavia; Consiglio Nazionale delle Ricerche CNR Transhumance the summer transfer of livestock to highland pastures is a traditional practice in the European Alps and is considered an integral part of the mountain ecosystem. Mountain lakes are generally oligotrophic systems and are particularly sensitive to the nutrient input caused by livestock. The aim of the present study was to quantify the impact of livestock grazing on the trophic state of high altitude lakes in an area where transhumance is a traditional practice Gran Paradiso National Park, Western Italian Alps , taking into account its dual value of ecosystem component and potential threat to lakes trophic status. The impact of flocks and herds grazing was estimated on sensitive parameters related to the trophic state of alpine lakes water transparency, nutrient content, bacterial load and chlorophyll a concentration. Transhumance produced a significant increase in the trophic state of lakes with high grazing pressure, but little or no effect was found at soft impacted lakes. Even though heavy impacted lakes represent a minority of the studied lakes three out of twenty , we indicated conservation measures such as fencing, wastewater treatment and livestock exclosure to be tested in Gran Paradiso National Park. La transhumance, transfert estival du betail vers les paturages d altitude, est une pratique traditionnelle dans les Alpes europeennes consideree comme une partie integrante de l ecosysteme de la montagne. Les lacs de montagne sont generalement des systemes oligotrophes particulierement sensibles a l apport de nutriments cause par le betail. Le but de la presente etude a ete de quantifier l impact du paturage du betail sur l etat trophique des lacs d altitude dans une zone ou 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 ecosysteme et de menace potentielle pour l etat trophique des lacs. L impact du paturage des troupeaux a ete estime sur les parametres sensibles lies a l etat trophique des lacs alpins la transparence de l eau, la teneur en elements nutritifs, la charge bacterienne et la concentration en chlorophylle a. La transhumance produit une augmentation significative de l etat trophique des lacs ou la pression de paturage est forte, mais peu ou pas d effet a ete trouve dans les lacs moins touches.Meme si les lacs tres impactes representent une minorite des lacs etudies trois sur vingt , nous avons indique les mesures de conservation telles que les clotures, l epuration des eaux usees et la mise en defens du betail a tester dans le parc national du Grand Paradis. Published version Articolo 2014_Knowledge_and_Management_of_Aquatic_Ecosystems_415_05.pdf Articolo in rivista EDP sciences 1961 9502 Knowledge and management of aquatic ecosystems Knowledge and management of aquatic ecosystems Knowl. manag. aquat. ecosyst. Knowledge and management of aquatic ecosystems. KMAE cristiana.callieri CALLIERI CRISTIANA michela.rogora ROGORA MICHELA gabriele.tartari TARTARI GABRIELE TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |