A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Structure and dynamics of food webs in Andean lakes
Food webs from oligotrophic Andean lakes of Bariloche region (41°S) are described. Their peculiarities in comparison with Northern Hemisphere studies are noted. The endemic species composition, the extended euphotic zone, and the oxygenated bottom allow a particular structure of the pelagic and benthic food webs. Experimental work with pelagic communities indicates that models based only on zooplankton body size are questionable and that nutrient enrichment does not necessarily lead to a positive effect on herbivorous populations. Invertebrate predation effects depend on the lake and type of predator, while vertebrate predation does control crustacean populations. The characteristic low species richness of top predators is likely to change following the introduction of exotic salmonids. The benthic food web is quite distinctive with a slow rate of decaying organic matter and easily altered by the introduction of exotic tree species.
Structure and dynamics of food webs in Andean lakes
Food webs from oligotrophic Andean lakes of Bariloche region (41°S) are described. Their peculiarities in comparison with Northern Hemisphere studies are noted. The endemic species composition, the extended euphotic zone, and the oxygenated bottom allow a particular structure of the pelagic and benthic food webs. Experimental work with pelagic communities indicates that models based only on zooplankton body size are questionable and that nutrient enrichment does not necessarily lead to a positive effect on herbivorous populations. Invertebrate predation effects depend on the lake and type of predator, while vertebrate predation does control crustacean populations. The characteristic low species richness of top predators is likely to change following the introduction of exotic salmonids. The benthic food web is quite distinctive with a slow rate of decaying organic matter and easily altered by the introduction of exotic tree species.
Structure and dynamics of food webs in Andean lakes
Modenutti, Beatriz E. (author) / Balseiro, Esteban G. (author) / Queimaliños, Claudia P. (author) / Añón Suárez, Diego A. (author) / Diéguez, María C. (author) / Albariño, Ricardo J. (author)
Lakes & Reservoirs: Research & Management ; 3 ; 179-186
1998-09-01
8 pages
Article (Journal)
Electronic Resource
English
Organochlorine compounds in soils and sediments of the mountain Andean Lakes
| Online Contents | 2005
| British Library Online Contents | 2004
Mercury bioaccumulation in estuarine food webs
| Wiley | 2012