Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1023/A:1021616811341
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Titel (primär) Paleolimnological assessment of human impacts in Lake Blanca, SE Uruguay
Autor García-Rodríguez, F.; Mazzeo, N.; Sprechmann, P.; Metzeltin, D.; Sosa, F.; Treutler, H.-C.; Renom, M.; Scharf, B.; Gaucher, C.
Quelle Journal of Paleolimnology
Erscheinungsjahr 2002
Department SEEFO; ANA
Band/Volume 28
Heft 4
Seite von 457
Seite bis 468
Sprache englisch
Abstract Paleolimnological techniques were used to assess human impacts onLake Blanca, a small (0.6 km2), coastal fresh waterbodyin southern Uruguay, which is the drinking water source for ∼100,000 localresidents. We retrieved a core that extends to about 1100 14Cyr BP. 210Pb ages, organic mater, CO3, totalcarbon, nutrients, fossil pigments and diatoms allowed us to establishlimnological conditions before and after cultural impacts. Soil removal(1880–1960) and intensive cattle and sheep grazing (1943–1966) ledto gully formation in the catchment. This watershed erosion resulted inincreased sedimentation rates. The aquatic system appeared to be mesotrophicwith dominance of epibenthic diatoms until ∼1966, at which timeeutrophication intensified with forestry activities. Increases in nutrients, aswell as blooms of planktonic diatoms, were observed. During the last decade,tourist/urban development as well as high drinking water demand caused areduction in lake area. Subsequent marked increases in rainfall led to furtherphytoplankton blooms and macrophyte proliferation.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=5497
García-Rodríguez, F., Mazzeo, N., Sprechmann, P., Metzeltin, D., Sosa, F., Treutler, H.-C., Renom, M., Scharf, B., Gaucher, C. (2002):
Paleolimnological assessment of human impacts in Lake Blanca, SE Uruguay
J. Paleolimn. 28 (4), 457 - 468 10.1023/A:1021616811341