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niveau trophique

Annales de Limnologie - International Journal of Limnology (1)

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Sublittoral and profundal chironomid (Diptera) communities of Lake Vico (Central Italy): relationship to the trophic level
M. Seminara, M. Bazzanti, C. Tamorri
Journal:

Annales de Limnologie - International Journal of Limnology / Volume 26 / Issue 2-3 / 1990

Published online by Cambridge University Press:

15 August 2009, pp. 183-193

Print publication:

1990
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Sublittoral and profundal chironomid community structure, depth distribution and relationship to the trophic level of the waters were investigated in Lake Vico (Central Italy) during 1985-1986. PCA analysis indicated a depth-dependent group of true profundal stations at 20, 30 and 40 m depths, characterized by Micropsectra, Procladius, Microtendipes, Tanytarsus and Paratendipes, and a group of 10 m stations, characterized by Cryptochironomus, Polypedilum bicrenatum gr., Cladopelma lateralis gr. and C. laccophila gr., representing the sublittoral features of this depth. In agreement with the chemical data, the chironomid community indicated a mesotrophic condition of Lake Vico, with a tendency towards an increasing trophic level in the deepest zone. A significant role in revealing future trophic changes in the lake may be attributed to the key-indicator Micropsectra.