THE USE OF NULL MODELS TO EXPLAIN CRUSTACEAN ZOOPLANKTON ASSOCIATIONS IN SHALLOW WATER BODIES OF THE MAGELLAN REGION, CHILE BY PATRICIO DE LOS RÍOS 1 ) , NELSON RIVERA and MARCELA GALINDO Universidad Católica de Temuco, Facultad de Recursos Naturales, Escuela de Ciencias Ambientales, Casilla 15-D, Temuco, Chile ABSTRACT Southern Patagonia is characterized by the presence of numerous shallow ponds with variable trophic and conductivity conditions, and a relatively high species richness of Crustacea. In the present study, published information and data collected in field work on shallow ponds in the Magellan region was reviewed and analysed using co-occurrence of null models, with the aim to determine potential random factors as regulators on crustacean zooplankton assemblages, using a presence- absence matrix. The results of C-score analysis revealed the existence of non-random effects mainly in data collected in 1989-1990 for Torres del Paine National Park, and in data on coastal shallow ponds close to Punta Arenas, collected in October 2006. A different situation is reported for shallow ponds located in other zones of the Magellan region, including also some in the Torres del Paine National Park collected in October 2001, and for shallow ponds close to Porvenir on Tierra
Crustaceana – Brill
Published: Jan 1, 2008
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