Water flow enhances ammonium and nitrate uptake in a seagrass community

The impact of hydrodynamic regime on rates of nutrient uptake for a seagrass community and for individual components of the community (Thalassia testudinum, epiphytes, phytoplankton, microphytobenthos) was quantified through the deployment of a field flume and application of15N-labeled ammonium and...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) 2006-04, Vol.312, p.1-13
Main Authors: Cornelisen, Christopher D., Thomas, Florence I. M.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Epiphytes
FEATURE ARTICLE
Flumes
Fundamental and applied biological sciences. Psychology
Hydrodynamics
Nitrates
Nitrogen
Nutrient uptake
Phytoplankton
Quaternary ammonium compounds
Sea water ecosystems
Sediments
Shear stress
Synecology
Thalassia testudinum
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Summary:The impact of hydrodynamic regime on rates of nutrient uptake for a seagrass community and for individual components of the community (Thalassia testudinum, epiphytes, phytoplankton, microphytobenthos) was quantified through the deployment of a field flume and application of15N-labeled ammonium and nitrate tracers. Ammonium uptake rates for the community and for seagrass leaves and epiphytes were enhanced with increased bulk velocity (uptake rate ∝U b 0.57 to 0.70) and Reynolds shear stress at the top of the canopy (uptake rate ∝ τR 0.32 to 0.40); thus, relationships expected for mass-transfer limitation apply for the entire assemblage and individual components that form the canopy. Nitrate uptake rates for the community and for epiphytes
ISSN:0171-8630
1616-1599
DOI:10.3354/meps312001