Algas verdes y euglénidos de la Puna argentina

Abstract

Mirande, Virginia; Beatriz C. Tracanna. 2017. “Green Algae and Euglenids of Argentinean Puna”. Lilloa 54 (2). The aim of this paper was to contribute to the qualitative knowledge of chlorophytes and euglenophytes of argentinean puna. These environments are extrem, dynamic and weak systems, essential for functionement of small andean watersheds. Sampling was realized during the summer of 2005 and this included twenty six lentic bodies corresponding to the provinces of Jujuy, Salta and Catamarca. Qualitative samples were ob- tained by the concentrate 25 liters of water through plankton net of 20 μm and were fixed in situ with formaldehyde 4%. Algal determinations were performed under binocular microscope with drawing camera in laboratory. We recognized 28 taxa belonging to Chlorophyta (24) and Euglenophyta (4). The highest number of species was 8 in Los Enamorados (Jujuy) and without registration in 26% of water bodies sampled. According to the results, there was a predomi- nance of rare species, the most cosmopolitan and saline environments. Hence seventeen of the twenty eight recognized entities (60.7%) were in saline environments. Chlamydomonas rubrifilum, Oedogonium sp. 1 and Stigeoclonium sp. 2 were the ones found only in hypersaline waters while Chlamydomonas tremulans, Oedogonium sp. 3, Spirogyra sp. 1, Spirogyra sp. 2, Ulothrix pseudoflacca var. salina, Euglena ehrenbergii were also found at lower salinities. In the case of Raciborskiella salina it was detected in both salt and salt-hypersaline waters, with conductivities up to 22500 μS/cm. The green algae and euglenids taxa statements in this publication are new appointments for these wetlands because there were not register about them. Furthermore, Ulothrix pseudoflacca var. salina is mentioned for the first time to the Northwest of Argentina (NWA).