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          Institute: MPI für Evolutionsbiologie     Collection: Tropical ecology     Display Documents

ID: 31807.0, MPI für Evolutionsbiologie / Tropical ecology
Responses of Phytoplankton and Submerged Aquatic Macrophytes to Experimental Nutrient Enrichment in the Pantanal, Mato Grosso (Brazil): First Results
Authors:Adler, Maren; Junk, Wolfgang Johannes
Place of Publication:Geesthacht
Date of Publication (YYYY-MM-DD):2002
Title of Proceedings:Neotropical Ecosystems : Proceedings of the German-Brazilian Workshop, Hamburg 2000
Start Page:899
End Page:902
Physical Description:book with abstracts and CD-ROM with fulltexts
Name of Conference/Meeting:Neotropical Ecosystems. Proceedings of the German-Brazilian Workshop, Hamburg 2000
Place of Conference/Meeting:Hamburg
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Review Status:not specified
Audience:Not Specified
Abstract / Description:As one of the largest wetlands in the world, the Pantanal,
located in the NW-Brazil, is mainly influenced by the
seasonal changes of dryness and flooding. During low water
level, large amounts of nutrients become available and high
phytoplankton concentrations are observed. Submersed
aquatic macrophytes are strongly reduced. During the
period of high water level the concentration of available
nutrients in the water is very low and the nutrients are
mostly incorporated by free floating and submersed macrophytes.
The competition between submersed macrophytes
and phytoplankton under different nutrient conditions was
examined using enclosures with and without addition of
nutrients in order to determine limiting factors. Aquatic
macrophytes dominated under most experimental conditions
except high ammonia concentration. However,
starting conditions had a strong influence on the result of
the experiments. In addition to nutrients, competition for
light seems to be important for the dominance of algae or
aquatic macrophyte communities. The results are expected
to contribute to environmental assessment and sustainable
management of the Pantanal.
Free Keywords:Pantanal of Mato Grosso; Algae; Aquatic macrophytes;
Competition; Enclosure experiments; Nutrients
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Pia Parolin
Affiliations:MPI für Evolutionsbiologie/AG Tropenökologie
External Affiliations:Universidade Federal de Mato Grosso - Instituto de Biociências, Cuiabá, Mato Grosso, Brazil
Identifiers:ISBN:3-00-010691-X [ID-No:1]
LOCALID:2194/S 37926 [Listen-Nummer/S-Nummer]
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