Biodiversity of plankton and microphytes in high land of central Andes in San Juan, Argentina

SANABRIA, E; QUIROGA, L; GIANNONI, SM; BORGHI, CE

Mendoza

Otro; XXVI Reunión Científica Anual Sociedad de Biología de Cuyo; 2008

Sociedad de Biología de Cuyo

The biodiversity of high land in central Andes in San Juan is poor know. In January 2007 we collected samples of plankton (PL) and microphytes (MP) in different environment types (lotic and lentic water resources). The samples were obtained by means of drag net to 53 μm and PL was conserved in alcohol 70% and MP in formalin 4 %. Eight point were sampled, two in the river (Lentic), three in creeks (Lentic) and three in vegas (Lotic); all point was upper 3500 msn over sea level. We calculated the Shannon-Winner diversity index for each environment measurement. The mean diversity of PL was 1.14±0.09 and MP was 0.49±0.14, diversities different in all samples; exists more species of MP than PL (Mann Whitney U=2.68, p0.05 and χ2=0.09; p>0.05). The lentic and lotic environments not report differences in the number to species for MP and PL (χ2, p>0.05). This study was carried out in the highlands of northwestern par of San Juan Province. A total of 20 species of PL and 60 species of MP are reported.