Androniscus Dentiger

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Ecologia della Grotte di Frasassi Gabriele Gentile CAVERNICOLE TROPHIC STRUCTURE Primary source of energy: allochthonous organic matter Detritivores and Consumers I decomposers Consumers II CAVERNICOLE TROPHIC STRUCTURE Oligotrophic environment Distribution of cave Branches and chambers organisms: strictly without allochthonous connected to displacement energy input remain of food resources uninhabited Detritivores and Consumers I decomposers Consumers II MOVILE CAVE Long isolation (500000 years) No allochthonous energy input Sarbu et al., 1996 MOVILE CAVE 48 invertebrate species (33 endemics) Chemoautotrophic ecosystem: methane and sulfur oxidising bacteria Sarbu et al., 1996 FRASASSI CAVE Connected to the surface, habitat continuum Spotted allochthonous organic matter In the deeper section chemoautotrophic production 67 animal species (15 in sulfidic areas) Troglobites and troglophilics Sarbu et al., 2000 Androniscus dentiger Most abundant terrestrial invertebrate in the cave, endogean and hypogean Well studied among Italy and within Frasassi cave system (presence of population structure within the cave system. (Gentile and Sarbu, 2004)). Gentile and Sbordoni, 1998; Gentile, 1998; Gentile and Allegrucci, 1999 Population feeding on food indirectly based on photosynthesis are isotopically differentiated Invertebrate communities are based on different trophic sources Sarbu et al., 2000 Sampling sites BV Mutually isolated No connections with Grotta del Fiume CONCLUSIONS This study highlighted high and unespected level of structure in populations of A. dentiger within Grotta del Fiume Although Grotta del Fiume is an open system, the trophic sources displacement can cause, through stocastic and deterministic microevolutionary processes, the differentiation of populations even in absence of geographic barriers. The sulfidic areas of Frasassi Cave should be carefully managed to ensure adequate conservation of the microevolutionary processes within the cave. REFERENCES • Sarbu, S.M., T.C. Kane, B.K. Kinkle. 1996. A chemoautotrophically based cave ecosystem. Science, 272: 1953-1955. • Sarbu, S.M., S. Galdenzi, M. Menichetti, M., G. Gentile. 2000. Geology and Biology of Grotte di Frasassi (Frasassi Caves) in Central Italy: An ecological multi-disciplinary study of a hypogenic underground karst system. Pp. 345-378 in H. Wilkens, D.C. Culver, W.F. Humphreys, eds. Ecosystems of the world, vol 30. Subterranean ecosystems. Amsterdam: Elsevier. • Gentile, G. 1998. Gli eventi paleoclimatici del Quaternario in Italia Centrale: il modello biogeografico di Androniscus dentiger (Oniscidea, Trichoniscidae). Biogeographia, n.s. 19: 145-156. • Gentile, G., G. Allegrucci. 1999. Geographic variation and genetic relationships in populations of the Androniscus dentiger complex from Central Italy (Isopoda, Oniscidea, Trichoniscidae). International Journal of Speleology, 26: 47-61. • Gentile, G., S.M. Sarbu. 2004. Trophic sources partition and population genetic structure of the isopod Androniscus dentiger from a chemoautotrophy based underground ecosystem. Subterranean Biology, 2:7-14. • Gentile, G., V. Sbordoni. 1998. Indirect methods to estimate gene flow in cave and surface populations of Androniscus dentiger (Isopoda, Oniscidea). Evolution, 52: 332-342. THANKS.

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Woodlice in Britain and Ireland: Distribution and Habitat Is out of Date Very Quickly, and That They Will Soon Be Writing the Second Edition
• • • • • • I att,AZ /• •• 21 - • '11 n4I3 - • v., -hi / NT I- r Arty 1 4' I, • • I • A • • • Printed in Great Britain by Lavenham Press NERC Copyright 1985 Published in 1985 by Institute of Terrestrial Ecology Administrative Headquarters Monks Wood Experimental Station Abbots Ripton HUNTINGDON PE17 2LS ISBN 0 904282 85 6 COVER ILLUSTRATIONS Top left: Armadillidium depressum Top right: Philoscia muscorum Bottom left: Androniscus dentiger Bottom right: Porcellio scaber (2 colour forms) The photographs are reproduced by kind permission of R E Jones/Frank Lane The Institute of Terrestrial Ecology (ITE) was established in 1973, from the former Nature Conservancy's research stations and staff, joined later by the Institute of Tree Biology and the Culture Centre of Algae and Protozoa. ITE contributes to, and draws upon, the collective knowledge of the 13 sister institutes which make up the Natural Environment Research Council, spanning all the environmental sciences. The Institute studies the factors determining the structure, composition and processes of land and freshwater systems, and of individual plant and animal species. It is developing a sounder scientific basis for predicting and modelling environmental trends arising from natural or man- made change. The results of this research are available to those responsible for the protection, management and wise use of our natural resources. One quarter of ITE's work is research commissioned by customers, such as the Department of Environment, the European Economic Community, the Nature Conservancy Council and the Overseas Development Administration. The remainder is fundamental research supported by NERC. ITE's expertise is widely used by international organizations in overseas projects and programmes of research.
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