Phosphorus limitation of coastal ecosystem processes
P V Sundareshwar1, J T Morris, E K Koepfler
1Department of Biological Sciences, Marine Science Program, University of South Carolina, Columbia, SC 29208, USA. pvs@duke.edu
Science (New York, N.Y.)
|January 25, 2003
Summary
Coastal wetland plants need nitrogen, but soil bacteria require phosphorus. This nutrient difference impacts carbon cycling and ecosystem management strategies.
Area of Science:
- Ecological stoichiometry
- Wetland biogeochemistry
- Microbial ecology
Background:
- Coastal wetlands are crucial ecosystems for nutrient cycling.
- Primary production is often nitrogen-limited in these environments.
- Trophic group-specific nutrient limitations are not fully understood.
Purpose of the Study:
- To investigate nutrient limitations in a pristine salt marsh.
- To differentiate nutrient requirements between plant and bacterial communities.
- To assess the implications of differential nutrient limitation on ecosystem processes.
Main Methods:
- Field study in a pristine salt marsh.
- Assessment of plant community nutrient response.
- Analysis of soil bacterial community nutrient limitation.
Main Results:
- Plant community growth was nitrogen-limited.
- Soil bacterial community growth was phosphorus-limited.
- Differential nutrient limitation affects ecosystem carbon dynamics.
Conclusions:
- Nutrient limitation varies between trophic groups in coastal wetlands.
- Phosphorus limitation of bacteria impacts carbon cycling.
- Ecosystem management must consider specific nutrient needs of different organisms.
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