Comparison of Tardigrades diversity in environments of Salta (Argentina)

ANDREA X, GONZÁLEZ REYES; ROCHA. ALEJANDRA MARIANA; CORRONCA, J. A.; SANDRA RODRIGUEZ ARTIGAS; DOMA, IRENE; REPP, YANINA; PÉREZ S.; OSTERTAG, B; DIESER, M; RODRIGUEZ VALERIA

Mendoza

Jornada; XXXIV Reunión científica anual de la Sociedad de Biología de Cuyo; 2016

COMPARISON OF TARDIGRADES DIVERSITY IN ENVIRONMENTS OF SALTA (ARGENTINA)González-Reyes A2, Rocha M1, Corronca J2, Rodríguez-Artigas S2, Doma I1, Repp Y1, Pérez S1, Ostertag B1, Dieser, M1, Rodríguez V21FCE&N, UNLPam; 2FCN-IEBI, UNSa-Argentina. E-mail: andyximena@gmail.com Relatively little is known of the Tardigrada fauna of Argentina, and specially for areas such as Salta province. The main goal of the present work was to evaluate and to compare the diversity of tardigrades in different environments of Salta from urban ones (with a high, medium and low vehicular traffic) to natural areas, passing through rural areas. Selected sites at 1100-1400 m.a.s.l. belong to phytogeographic province of the Yungas where sampled. Each sample was taken from lichens and mosses growing on bark of trees during rainy season of 2014 (autumn). They were treated following the usual methodology and specimens and eggs were mounted in polyvinyl-lactophenol. Data analysis was performed using PAST, PC-Ord and R programs. Three thousand four hundred and three specimens were collected belonging to heterotardigrades (three spp. of echiniscid) and eutardigrades (six spp. belonging to: Milnesidae, Macrobiotidae, Hypsibidae) probably some species are new to science. Inventories completeness was complete for the high and medium urban (H and M) communities, of 92% for low urban ones (L); 89% for native (N), and of the 90% for the rural communities (R).The later community (R) was 1,66 times more diverse than H, meanwhile the least difference in the diversity of the communities was reported between M and L, with value of 0.02 times higher for the first community. Non-metric multidimentional scaling (nMDS) explained in two axis the 86,10% (Axis 1: 58.5%, Axis 2: 27.6%) of the total variation, separating native community from those of R and urban ones (stress=6.67). In this work, we can conclude that regional biota shows a nested pattern between different studied environments with an homogenization process in urban areas. This pattern implies an important species loss from the rural to the urban environments.AREA TEMÁTICA6) Ecología, Etología y Biodiversidad (EB)