PRESENCE AND ABUNDANCE OF EUTREPTIELLA SPP. (EUGLENOPHYCEAE) IN RELATION TO SOME ENVIRONMENTAL VARIABLES IN USHUAIA BAY (BEAGLE CHANNEL, ARGENTINA)

LÓPEZ ABBATE, M. C., BARRÍA DE CAO, M. S. Y HOFFMEYER, M. S.

Bahía Blanca

Simposio; Estuarine & Coastal Sciences Association, Science and management of Estuaries and Coasts: A tale of two hemispheres (ECSA 44); 2008

Instittuto Argentono de Oceanografía

Marine members of Euglenophyceae (mainly Eutreptiella spp.) are usually distributed in coastal areas, and they have been associated with organic pollution. In the past 10 years, Ushuaia City has recorded an important population increase, and artificial effluents that drain into the adjacent bay have become more important. The main objective of this study is to compare the abundance of Eutreptiella sp. in zones with different anthropogenic pressure and to establish relationships with environmental factors. The abundance of Eutreptiella sp. was estimated in fourteen sampling stations during August 2004, and it varied from 0 to 2560 cells l-1. The abundance difference between the inner and outer stations was statistically significant (t=2,019, p