Analyse multivariable des taxocénoses annélidiennes du golfe du morbihan

Two initial methods are used to define benthic annelid taxocoenoses within the Morbihan gulf. 139 samples and 83 species are included in the matrix data. Correspondence analysis is shown to be appropriate in the classification of heterogeneous systems. It isolates Mesopsio moorei sand population from winole other samples. General analysis is better appropriate within homogeneous systems, and is able to study populations with regard to production. Results are comparable with those got fromthe whole fauna. In addition, a biogeographic limit is pointed out, within amphicteis gunneri sponge spicule muds. [NOT CONTROLLED OCR]