INVESTIGADORES
BEAMUD Sara guadalupe
capítulos de libros
Título:
Extreme Freshwater Ecosystems in Patagonia: The Copahue-Agrio System
Autor/es:
TEMPORETTI P; BAFFICO G; DIAZ M; BEAMUD G.; NICHELA D; CABRERA J ; PEDROZO, F.L.
Libro:
FRESHWATERS AND WETLANDS OF PATAGONIA. ECOSYSTEMS AND SOCIOECOLOGICAL ASPECTS
Editorial:
springer
Referencias:
Año: 2022; p. 70 - 90
Resumen:
The chapter compiles 20 years of research work carried out in the River Agrio-LakeCaviahue system by the Water Quality and Aquatic Resources Research Group. Thissystem is characterized by its natural gradient of acidity, as well as concentration andtransport of nutrients and metals, which is expressed in low diversity of species, both inlake plankton and river epilithic communities. The replacement of algal species (seasonalsuccession) does not occur in the lake under low pH conditions (Avg. 2.5). The low pHallows most of the elements present to remain in solution, conditioning environments witha high content of metals and phosphorus in the Upper River Agrio section and LakeCaviahue. In recent years, the lake has experienced a significant increase of at least one pHunit, (a situation that is controlled by magmatic activity), causing changes in chemicalcomposition. If the increase continues, it is expected to affect the epilithic andphytoplanktonic compositions. This fact is unprecedented for aquatic environments inArgentina. The chapter covers a) basic aspects such as water chemistry, nutrient loadings,trophic status, algal communities (phytoplankton and epilithic algae), the geochemistry ofsediments and their role in metal and nutrient dynamics, and b) applied aspects such as theuse of acidophilic algae as indicators of remediation processes of soils contaminated byhydrocarbons, the behaviour of a naturally acidic lake as a Fenton reactor, and the use ofsuch environments as a potential sentinel for nutrient deposition in Patagonia.