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Article: Environmental correlates of two macro-decapods distribution in Central Italy: Multi-dimensional ecological knowledge as a tool for conservation of endangered species

TitleEnvironmental correlates of two macro-decapods distribution in Central Italy: Multi-dimensional ecological knowledge as a tool for conservation of endangered species
Authors
KeywordsSpatial segregation
River crab
Ecological factors
Multi-variate statistics
Freshwater crayfish
Issue Date2007
Citation
Biological Conservation, 2007, v. 136, n. 3, p. 431-441 How to Cite?
AbstractUsing a multi-dimensional ecological design, this study aimed first to analyse whether local environmental conditions can account for the spatial segregation of two Italian native decapods, the crayfish Austropotamobius italicus and the river crab Potamon fluviatile, in Central Italy freshwater ecosystems. Second, we aimed to analyse which environmental variables were more closely associated with the presence/absence of the two decapods in specific sites within their distribution area. Following a factorial design, a total of 32 sites were selected in two neighbouring geographic areas, one occupied by crayfish and one by crabs. Within each distribution area, eight streams where the decapod was present and eight where it was not present were selected. At each site, macro-invertebrate community composition and 16 abiotic variables were recorded and analysed with multi-variate methods. Variations in physical (minimum and maximum temperatures), chemical (calcium, oxygen, nitrate and nitrite) and geomorphological (substrate composition) parameters explained spatial segregation of P. fluviatile and A. italicus in the study area. The occurrence of crayfish reflected variations of chemistry (such as pH, calcium, nitrate and nitrite concentrations), temperature, water depth and substrate composition. On the contrary, the presence of the river crab, within its occurrence zone, was not associated to any biotic and abiotic parameters and was probably affected by anthropogenic pressure and uncontrolled harvesting. These findings provide fundamental ecological data for the maintenance of the two decapod natural populations as well as for the selection of areas and streams adequate for their reintroduction. © 2007 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/219531
ISSN
2015 Impact Factor: 3.985
2015 SCImago Journal Rankings: 2.593

 

DC FieldValueLanguage
dc.contributor.authorBarbaresi, Silvia-
dc.contributor.authorCannicci, Stefano-
dc.contributor.authorVannini, Marco-
dc.contributor.authorFratini, Sara-
dc.date.accessioned2015-09-23T02:57:19Z-
dc.date.available2015-09-23T02:57:19Z-
dc.date.issued2007-
dc.identifier.citationBiological Conservation, 2007, v. 136, n. 3, p. 431-441-
dc.identifier.issn0006-3207-
dc.identifier.urihttp://hdl.handle.net/10722/219531-
dc.description.abstractUsing a multi-dimensional ecological design, this study aimed first to analyse whether local environmental conditions can account for the spatial segregation of two Italian native decapods, the crayfish Austropotamobius italicus and the river crab Potamon fluviatile, in Central Italy freshwater ecosystems. Second, we aimed to analyse which environmental variables were more closely associated with the presence/absence of the two decapods in specific sites within their distribution area. Following a factorial design, a total of 32 sites were selected in two neighbouring geographic areas, one occupied by crayfish and one by crabs. Within each distribution area, eight streams where the decapod was present and eight where it was not present were selected. At each site, macro-invertebrate community composition and 16 abiotic variables were recorded and analysed with multi-variate methods. Variations in physical (minimum and maximum temperatures), chemical (calcium, oxygen, nitrate and nitrite) and geomorphological (substrate composition) parameters explained spatial segregation of P. fluviatile and A. italicus in the study area. The occurrence of crayfish reflected variations of chemistry (such as pH, calcium, nitrate and nitrite concentrations), temperature, water depth and substrate composition. On the contrary, the presence of the river crab, within its occurrence zone, was not associated to any biotic and abiotic parameters and was probably affected by anthropogenic pressure and uncontrolled harvesting. These findings provide fundamental ecological data for the maintenance of the two decapod natural populations as well as for the selection of areas and streams adequate for their reintroduction. © 2007 Elsevier Ltd. All rights reserved.-
dc.languageeng-
dc.relation.ispartofBiological Conservation-
dc.subjectSpatial segregation-
dc.subjectRiver crab-
dc.subjectEcological factors-
dc.subjectMulti-variate statistics-
dc.subjectFreshwater crayfish-
dc.titleEnvironmental correlates of two macro-decapods distribution in Central Italy: Multi-dimensional ecological knowledge as a tool for conservation of endangered species-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.biocon.2006.12.013-
dc.identifier.scopuseid_2-s2.0-33947146208-
dc.identifier.volume136-
dc.identifier.issue3-
dc.identifier.spage431-
dc.identifier.epage441-

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