Resumo

IANNACONE, José  e  ALVARINO, Lorena. Zooplankton diversity from the Junin Natural Reserve, Peru. Ecol. apl. [online]. 2006, vol.5, n.1-2, pp.175-181. ISSN 1726-2216.

Zooplankton was assessed from four localities of the Junín Natural Reserve, Peru,: Upamayo Bridge, Upamayo Reservoir, Pari and Ondores. Alpha and beta diversity for zooplanktonic communities were calculated. Zooplankton was assigned to trophic guilds. A total of 35 zooplanktonic taxa were found. The following is the descending sequence related to aquatic species richness: Pari Upamayo Reservoir = Upamayo Bridge Ondores. Cladocerans were more abundant and with the highest species richness at Pari. Six species were shared by the four localities: Brachionus dimidiatus Bryce 1931 (Rotifera), Rhabdolaimus terrestris de Mann 1880 (Nematoda), Echiniscus sp. (Tardigrada), Aelosoma variegatum Vejdovsky 1866 (Annelida), a species of calanoid (Arthropoda) and Chironomus sp. (Arthropoda). Community diversity diminished in relation to increasing of the gradients mining contamination in the Junín Lake. Pleuroxus caca Baird 1843, P. laevis Sars 1861, P. trigonellus (Müller 1785) y P. truncatus (Müller 1785) are new records for the Lake. Decomposers were the predominant level. We conclude that rapid biodiversity assessment (RBA) at the Junín National Reserve is relatively high for zooplankton.

Palavras-chave : cladocera; conservation; Junin Lake; Pleuroxus; rotifer.

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