Comparative analysis of the phytoplankton communities of a peat bog from Tierra del Fuego (Argentina)

MATALONI, G.; TELL, G.

HYDROBIOLOGIA

SPRINGER

Lugar: Belgium; Año: 1996 p. 101 - 112

0018-8158

The phytoplankton communities of five water hollows and a river from the Rancho Hambre peat bog (Tierra del Fuego, Argentina) are compared as to species composition and densities, as well as morphological, chemical and physical data . A total of 212 taxa is reported, the river having the highest species richness (105) and algal density (6374 ind .ml-1). Water hollows showed remarkable differences in the structure of their phytoplankton communities. A cluster analysis, based on species presence-absence, clearly distinguishes the river from the water hollows. The hollows fall into groups . One contains the shallow ones the other, the smallest, deepest ones . Correlation analyses between biotic and abiotic variates shows strong correlations between the relative frequencies of some major groups (Chrysophyceae, Euglenophyceae, Tribophyceae) and the values of abiotic variables (alkalinity, pH, conductivity and dissolved phosphate) .