Details
| Original language | English |
|---|---|
| Pages (from-to) | 17-27 |
| Number of pages | 11 |
| Journal | Journal of Ecohydraulics |
| Volume | 7 |
| Issue number | 1 |
| Early online date | 17 Dec 2020 |
| Publication status | Published - 2022 |
Abstract
Seagrass meadows have disappeared on many coastal sections due to anthropogenic disturbances, diseases, and/or eutrophication. To facilitate informed seagrass restoration, we i) quantified the hydrodynamic dislodgement thresholds for newly transplanted Z. marina shoots, and ii) tested the effect of artificial seagrass (ASG) as a hydrodynamic protection measure. Experiments were carried out by planting Z. marina rhizomes with living shoots into a sediment bed and exposing them to a range of wave and current conditions in a flume. The use of ASG significantly reduced wave height, as well as current velocity. The applied waves led to the development of ripples whereas currents led to erosion of the sediment bed. The number of shoots that were uprooted and dislodged increased with increasing bed shear stress and erosion. By reducing bed shear stress, the ASG raised the input current velocity threshold, which the transplanted shoots were able to withstand. The present study offers insight into the effect of artificial seagrass (ASG) on wave and current attenuation, as well as sediment erosion and shoot dislodgement. Our results help to inform the setting of hydrodynamic thresholds for the early establishment of Z. marina and to define the improvement of hydrodynamic conditions by ASG.
Keywords
- Current velocity, bed shear stress, erosion, ripple formation, seagrass restoration, wave energy
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
Sustainable Development Goals
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In: Journal of Ecohydraulics, Vol. 7, No. 1, 2022, p. 17-27.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of artificial seagrass on hydrodynamic thresholds for the early establishment of Zostera marina
AU - Carus, Jana
AU - Arndt, Carmen
AU - Bouma, Tjeerd
AU - Schröder, Boris
AU - Paul, Maike
N1 - Funding Information: The work was funded by MWK Lower Saxony Niedersächsisches Vorab as part of the collaborative project “SeaArt - Long term establishment of SEAgrass ecosystems through biodegradable ARTificial meadows", funded by the Federal State of Lower Saxony” (Grant No. ZN3187). We thank Raúl Villanueva and Magnus Asmussen for gathering the plant material and the whole SeaArt team for inspirations on the experiments and the manuscript. We furthermore thank Lennart van IJzerloo for technical support at the NIOZ.
PY - 2022
Y1 - 2022
N2 - Seagrass meadows have disappeared on many coastal sections due to anthropogenic disturbances, diseases, and/or eutrophication. To facilitate informed seagrass restoration, we i) quantified the hydrodynamic dislodgement thresholds for newly transplanted Z. marina shoots, and ii) tested the effect of artificial seagrass (ASG) as a hydrodynamic protection measure. Experiments were carried out by planting Z. marina rhizomes with living shoots into a sediment bed and exposing them to a range of wave and current conditions in a flume. The use of ASG significantly reduced wave height, as well as current velocity. The applied waves led to the development of ripples whereas currents led to erosion of the sediment bed. The number of shoots that were uprooted and dislodged increased with increasing bed shear stress and erosion. By reducing bed shear stress, the ASG raised the input current velocity threshold, which the transplanted shoots were able to withstand. The present study offers insight into the effect of artificial seagrass (ASG) on wave and current attenuation, as well as sediment erosion and shoot dislodgement. Our results help to inform the setting of hydrodynamic thresholds for the early establishment of Z. marina and to define the improvement of hydrodynamic conditions by ASG.
AB - Seagrass meadows have disappeared on many coastal sections due to anthropogenic disturbances, diseases, and/or eutrophication. To facilitate informed seagrass restoration, we i) quantified the hydrodynamic dislodgement thresholds for newly transplanted Z. marina shoots, and ii) tested the effect of artificial seagrass (ASG) as a hydrodynamic protection measure. Experiments were carried out by planting Z. marina rhizomes with living shoots into a sediment bed and exposing them to a range of wave and current conditions in a flume. The use of ASG significantly reduced wave height, as well as current velocity. The applied waves led to the development of ripples whereas currents led to erosion of the sediment bed. The number of shoots that were uprooted and dislodged increased with increasing bed shear stress and erosion. By reducing bed shear stress, the ASG raised the input current velocity threshold, which the transplanted shoots were able to withstand. The present study offers insight into the effect of artificial seagrass (ASG) on wave and current attenuation, as well as sediment erosion and shoot dislodgement. Our results help to inform the setting of hydrodynamic thresholds for the early establishment of Z. marina and to define the improvement of hydrodynamic conditions by ASG.
KW - Current velocity
KW - bed shear stress
KW - erosion
KW - ripple formation
KW - seagrass restoration
KW - wave energy
UR - http://www.scopus.com/inward/record.url?scp=85113176093&partnerID=8YFLogxK
U2 - 10.1080/24705357.2020.1858197
DO - 10.1080/24705357.2020.1858197
M3 - Article
VL - 7
SP - 17
EP - 27
JO - Journal of Ecohydraulics
JF - Journal of Ecohydraulics
SN - 2470-5357
IS - 1
ER -