Details
| Original language | English |
|---|---|
| Article number | 207 |
| Journal | Frontiers in Marine Science |
| Volume | 4 |
| Issue number | JUN |
| Publication status | Published - 28 Jun 2017 |
Abstract
In coastal locations seagrass beds are exposed to various hydrodynamic forces that can include waves and/or unidirectional currents. Differences in these forces may be expected to alter nutrient (such as phosphorus and nitrogen compounds e.g., ammonium) uptake rates by seagrass leaves. We investigated in a laboratory flume how high and low velocities with the absence or presence of waves control ammonium absorption. Our results showed that low currents with waves had the highest nutrient uptake compared to all other treatments. This result was ascribed to a combination of mechanisms. The waves may have influenced turbulence and thereby the water movement around the leaf surface, whilst the low current enabled the canopy to remain upright with an open structure, thereby allowing leaves to be exposed to a greater exchange of ammonium rich water. Although, higher currents with waves might have increased turbulence, bending under the high current squeezed the canopy into a compact closed structure. This study indicates that there are broader implications of the observed mechanisms of nutrient uptake, for instance how they depend on the plant morphology such as the leaf area, length and flexibility.
Keywords
- Currents, Flume, Nutrient uptake, Seagrass bed, Waves, Zostera noltii
ASJC Scopus subject areas
- Environmental Science(all)
- Water Science and Technology
- Environmental Science(all)
- Environmental Science (miscellaneous)
- Engineering(all)
- Ocean Engineering
- Agricultural and Biological Sciences(all)
- Aquatic Science
- Earth and Planetary Sciences(all)
- Oceanography
- Environmental Science(all)
- Global and Planetary Change
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In: Frontiers in Marine Science, Vol. 4, No. JUN, 207, 28.06.2017.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ammonium uptake rates in a seagrass bed under combined waves and currents
AU - Gillis, L.G.
AU - Paul, M.
AU - Bouma, T.
N1 - Acknowledgements: We thank NIOZ-Yerseke for access to the flume, and the technical staff for supporting the flume work. Particular gratitude is extended to Bert Sinke and Jos van Soelen. MP acknowledges funding by the German Science Foundation (grant no. PA 2547/1-1).
PY - 2017/6/28
Y1 - 2017/6/28
N2 - In coastal locations seagrass beds are exposed to various hydrodynamic forces that can include waves and/or unidirectional currents. Differences in these forces may be expected to alter nutrient (such as phosphorus and nitrogen compounds e.g., ammonium) uptake rates by seagrass leaves. We investigated in a laboratory flume how high and low velocities with the absence or presence of waves control ammonium absorption. Our results showed that low currents with waves had the highest nutrient uptake compared to all other treatments. This result was ascribed to a combination of mechanisms. The waves may have influenced turbulence and thereby the water movement around the leaf surface, whilst the low current enabled the canopy to remain upright with an open structure, thereby allowing leaves to be exposed to a greater exchange of ammonium rich water. Although, higher currents with waves might have increased turbulence, bending under the high current squeezed the canopy into a compact closed structure. This study indicates that there are broader implications of the observed mechanisms of nutrient uptake, for instance how they depend on the plant morphology such as the leaf area, length and flexibility.
AB - In coastal locations seagrass beds are exposed to various hydrodynamic forces that can include waves and/or unidirectional currents. Differences in these forces may be expected to alter nutrient (such as phosphorus and nitrogen compounds e.g., ammonium) uptake rates by seagrass leaves. We investigated in a laboratory flume how high and low velocities with the absence or presence of waves control ammonium absorption. Our results showed that low currents with waves had the highest nutrient uptake compared to all other treatments. This result was ascribed to a combination of mechanisms. The waves may have influenced turbulence and thereby the water movement around the leaf surface, whilst the low current enabled the canopy to remain upright with an open structure, thereby allowing leaves to be exposed to a greater exchange of ammonium rich water. Although, higher currents with waves might have increased turbulence, bending under the high current squeezed the canopy into a compact closed structure. This study indicates that there are broader implications of the observed mechanisms of nutrient uptake, for instance how they depend on the plant morphology such as the leaf area, length and flexibility.
KW - Currents
KW - Flume
KW - Nutrient uptake
KW - Seagrass bed
KW - Waves
KW - Zostera noltii
UR - http://www.scopus.com/inward/record.url?scp=85024368860&partnerID=8YFLogxK
U2 - 10.3389/fmars.2017.00207
DO - 10.3389/fmars.2017.00207
M3 - Article
VL - 4
JO - Frontiers in Marine Science
JF - Frontiers in Marine Science
SN - 2296-7745
IS - JUN
M1 - 207
ER -