Early Registration Deadline
12 February 2010

Travel Award & Grant Recipients Notified
March 2010

Authors Notified
April 2010

Schedule Posted
January 2010

Ordóñez, V. ., Laboratorio de Ecología Acuática, Universidad San Francisco de Quito, Quito, Ecuador, sire_ordonez@hotmail.com
Encalada, A. ., Laboratorio de Ecología Acuática, Universidad San Francisco de Quito , Quito, Ecuador, aencalada@usfq.edu.ec
Ríos, B. ., Departamento de Ecología, Universidad de Barcelona, Barcelona, Spain, brios@ub.edu
Prat, N. ., Departamento de Ecología, Universidad de Barcelona, Barcelona, Spain, nprat@ub.edu
Vimos, D. ., Laboratorio de Ecología Acuática, Universidad San Francisco de Quito, Quito, Ecuador, diego_v02@yahoo.com

EFFECTS OF LAND USE ON THE ECOLOGICAL INTEGRITY OF HIGH-ALTITUDE ANDEAN STREAMS IN NORTHERN ECUADOR

High altitude ecosystems provide most of the water for cities and irrigation in the Andean region. Land-use pressures in these landscapes are growing rapidly without planning. We studied the effects of land use in the ecological integrity of high-Andean streams in northeastern Ecuador to contribute to land-use management strategies. During 2009, we studied three microcatchments divided in two altitudinal ranges (2800 – 3000 m and 3500 – 4000 m). At each altitude, three land-use types and a control site were chosen. In each land-use type we choose three streams and at each one we sampled stream physicochemical and biological factors, and land-use parameters at three different scales (watershed, corridor and reach). Our preliminary results suggest strong effects of mining and urban settlements on stream invertebrate communities, as indicated by lower alfa diversity and higher density of Chironomidae and Tubificidae. Richness was higher at control sites and higher altitudes. Overall, stream ecosystem integrity was lower at mining sites. Results of this research will be used to guide land-use management strategies to conserve the integrity of high-Andean streams.

Session #:T21
Date: 06-08-10
Time: 16:30

Presentation is given by student: No