| Title | The contrasting evolution of two volcanic lakes lying in the same caldera (Monticchio, Mt. Vulture, Italy) inferred from literature records |
| Abstract | Lago Piccolo and Lago Grande di Monticchio lie in the collapsed caldera of the volcanic structure of Mt. Vulture (Basilicata, Italy). In over two centuries, a number of studies on their water and on their submerged and riparian vegetation, were carried out, demonstrating an interesting biodiversity. The entire lake area, which is impacted by strong tourist pressure, is part of the "Monte Vulture" Special Area of Conservation (SAC IT9210210). The aim of this paper is to review the literature studies on these lakes, in order to identify the more suitable limnological parameters to infer the history of the trophic status of the two lakes. For this reason, we assess the current ecological status of the two lakes on the basis of physical, chemical and biological analyses deriving from two recent surveys carried out in 2005-2007 and in 2015, and compare these data with sparse, but relevant, historical records, in order to assess how human impacts affected both these lakes and to understand the differences in their present trophic status. Because of its peculiar water chemistry, Lago Piccolo is resulted in good and stable ecological conditions. On the contrary, water transparency of Lago Grande came out very low in summer, while total phosphorus and nitrogen concentration are proved high, leading to the persistence of critical environmental conditions in this lake, with high algal biomass and durable algal blooms in late summer, dominated by cyanobacteria. Finally, in absence of standard protocols and seasonal samplings, the macrophyte maximum growing depth should be considered the more reliable indicator of trophic status among those available for these specific lakes, being relatively independent from sampling methods and seasonal pattern. |
| Source | Advances in Oceanography and Limnology (print) 10 (1), pp. 44–56 |
| Keywords | EutrophicationHistorical dataMacrophytesPhytoplanktonWater chemistryZooplankton |
| Journal | Advances in Oceanography and Limnology (print) |
| Editor | Taylor & Francis, , Regno Unito |
| Year | 2019 |
| Type | Articolo in rivista |
| DOI | 10.4081/aiol.2019.7949 |
| Authors | Spicciarelli, Renato; Marchetto, Aldo |
| Text | 407846 2019 10.4081/aiol.2019.7949 Scopus 2 s2.0 85071379610 Eutrophication Historical data Macrophytes Phytoplankton Water chemistry Zooplankton The contrasting evolution of two volcanic lakes lying in the same caldera Monticchio, Mt. Vulture, Italy inferred from literature records Spicciarelli, Renato; Marchetto, Aldo Istituto di Ricerca sulle Acque, Italy; Universita degli Studi della Basilicata Lago Piccolo and Lago Grande di Monticchio lie in the collapsed caldera of the volcanic structure of Mt. Vulture Basilicata, Italy . In over two centuries, a number of studies on their water and on their submerged and riparian vegetation, were carried out, demonstrating an interesting biodiversity. The entire lake area, which is impacted by strong tourist pressure, is part of the Monte Vulture Special Area of Conservation SAC IT9210210 . The aim of this paper is to review the literature studies on these lakes, in order to identify the more suitable limnological parameters to infer the history of the trophic status of the two lakes. For this reason, we assess the current ecological status of the two lakes on the basis of physical, chemical and biological analyses deriving from two recent surveys carried out in 2005 2007 and in 2015, and compare these data with sparse, but relevant, historical records, in order to assess how human impacts affected both these lakes and to understand the differences in their present trophic status. Because of its peculiar water chemistry, Lago Piccolo is resulted in good and stable ecological conditions. On the contrary, water transparency of Lago Grande came out very low in summer, while total phosphorus and nitrogen concentration are proved high, leading to the persistence of critical environmental conditions in this lake, with high algal biomass and durable algal blooms in late summer, dominated by cyanobacteria. Finally, in absence of standard protocols and seasonal samplings, the macrophyte maximum growing depth should be considered the more reliable indicator of trophic status among those available for these specific lakes, being relatively independent from sampling methods and seasonal pattern. 10 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85071379610 origin=inward articolo articolo 7949 Article Text 41106 2 10 20190701.pdf Articolo in rivista Taylor Francis 1947 5721 Advances in Oceanography and Limnology print Advances in Oceanography and Limnology print Advances in Oceanography and Limnology aldo.marchetto MARCHETTO ALDO |
