{"refrec":{"BRefID":65049,"RR":"<b>Magni, P.; Micheletti, S.; Casu, D.; Floris, A.; De Falco, G.; Castelli, A.</b> (2004). Macrofaunal community structure and distribution in a muddy coastal lagoon. <i>Chem. Ecol. 20(suppl. 1)</i>: 397-409","BEntID":61519,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Chem. Ecol. 20(suppl. 1)</i>: 397-409","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Magni, P.; Micheletti, S.; Casu, D.; Floris, A.; De Falco, G.; Castelli, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Magni, P. <i>et al.</i>","Englishabstract":"Macrofaunal communities and specific bulk properties of organically enriched sediments were investigated in the coastal lagoon of Cabras (Sardinia, western Mediterranean) on a grid of twenty-nine sampling stations, in spring 2001. Species composition and community structure indicated poor and heterogeneous macrofaunal communities, characterized by few predominant <i>taxa</i> typical of degraded environments, such as <i>Polydora ciliata</i>, Tubificidae nc and <i>Neanthes succinea</i>, distributed differently in some areas of the lagoon. Sediments were homogeneously muddy, with a mean silt + clay content of 93&#037;. The analysis of specific grain size intervals within the mud fraction, however, highlighted a marked spatial variability of sediment particle distribution. Simple associations included a positive relationship of both <i>Ficopomatus enigmaticus</i> and <i>Corophium sextonae</i>, patchily distributed along the shores, with sediment sorting, an index of sediment selection due to hydrodynamic energy. By contrast, inner areas, characterized by a major accumulation of finer particles (and organic matter), with a sediment mean size up to 8.2 phi, were least populated. 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