Understanding the seagrass‐sediment‐light feedback to guide restoration planning: a case study using Zostera muelleri DOI Creative Commons
Oliver Dalby, Rhys A. Coleman, Yi Mei Tan

и другие.

Restoration Ecology, Год журнала: 2023, Номер 31(8)

Опубликована: Окт. 24, 2023

Seagrass ecosystems are ecologically important but declining worldwide, prompting restoration efforts. However, success is partially reliant on ensuring that donor material and planting methods suitable under the environmental conditions expected within sites. This may require at critical densities needed to initiate favorable feedbacks, plants pre‐adapted local conditions, setting realistic goals. An understanding of relationship between (e.g. light environment seagrass structural complexity) can be particularly in guiding decision‐making. Here, we investigate how sediment‐light interact with complexity (density above‐ground morphology) guide approaches for intertidal Zostera muelleri . Using generalized additive models empirical data, identified significant relationships Z. meadows present Western Port, Victoria, southeast Australia. We found a decrease shoot density leaf length decreasing availability, potentially reflective an adaptive change species morphology response low‐light environments. also sediment sorting increased fine particles increasing meadow complexity, suggesting increases stability, accretion, contribute water clarity via ecological feedbacks. These findings suggest both drivers potential feedbacks occur before large‐scale begins targets should reflect form most likely present.

Язык: Английский

Increased current flow enhances the risk of organic carbon loss fromZostera marinasediments: Insights from a flume experiment DOI Creative Commons
Martin Dahl, Eduardo Infantes,

Rosanna Clevesjö

и другие.

Limnology and Oceanography, Год журнала: 2018, Номер 63(6), С. 2793 - 2805

Опубликована: Авг. 13, 2018

Abstract Hydrodynamic processes are important for carbon storage dynamics in seagrass meadows, where periods of increased hydrodynamic activity could result erosion and the loss buried carbon. To estimate impacts on resuspension organic (C org ) seagrass‐vegetated sediments, we exposed patches (0.35 × 0.35 cm) Zostera marina (with different biomass, shoot densities, sediment properties) to gradually unidirectional (current) flow velocities ranging from low (5 cm s −1 high (26 a hydraulic flume with standardized water column height 0.12 m. We found that higher substantially (by more than threefold) proportion C suspended resulting up 5.5% ± 1.7% (mean SE) surface sediment. This was presumably due larger, carbon‐rich detritus particles. Resuspension plots correlated properties (i.e., bulk density, porosity, sedimentary plant structure belowground biomass). However, density had no influence (comparing unvegetated sediments sparse, moderate, dense bed types), which be relatively experimental setup maximum 253 shoots m −2 reflecting natural conditions Swedish west coast. The projected increase frequency intensity forces climate change thus negatively affect function meadows as sinks.

Язык: Английский

Процитировано

33
Quantifying Seasonal Seagrass Effects on Flow and Sediment Dynamics in a Back‐Barrier Bay DOI
Qingguang Zhu, Patricia L. Wiberg, Matthew A. Reidenbach

и другие.

Journal of Geophysical Research Oceans, Год журнала: 2020, Номер 126(2)

Опубликована: Дек. 23, 2020

Abstract Seagrass growth and senescence exert a strong influence on flow structure sediment transport processes in coastal environments. However, most previous studies of seasonal seagrass effects either focused small‐scale field measurements or did not fully resolve the synergistic flow‐wave‐vegetation‐sediment interaction at meadow scale. In this study, we applied coupled Delft3D‐FLOW SWAN model that included flow, waves, resuspension shallow bay to quantify impacts dynamics. The was extensively validated using hydrodynamic suspended data within nearby unvegetated site. Our results show meadows significantly attenuated (60%) waves (20%) reduced concentration (85%) during summer when its density reached maximum. Probability distributions combined wave‐current bed shear stress indicate significant reductions were mainly caused by retardation rather than wave attenuation. Although low‐density winter resulted much smaller compared with meadows, small changes large differences magnitude attenuation stress. Similarly, while high densities effectively trapped summer, net flux into/out meadow. At our study site, low provided wintertime loss losses associated completely conditions.

Язык: Английский

Процитировано

32
Can pesticides, copper and seasonal water temperature explain the seagrass Zostera noltei decline in the Arcachon bay? DOI

Perrine Gamain,

Agnès Feurtet‐Mazel,

Régine Maury‐Brachet

и другие.

Marine Pollution Bulletin, Год журнала: 2017, Номер 134, С. 66 - 74

Опубликована: Окт. 26, 2017

Язык: Английский

Процитировано

29
Carbon storage and sediment trapping by Egeria densa Planch., a globally invasive, freshwater macrophyte DOI Creative Commons
Judith Z. Drexler, Shruti Khanna, Jessica R. Lacy

и другие.

The Science of The Total Environment, Год журнала: 2020, Номер 755, С. 142602 - 142602

Опубликована: Окт. 2, 2020

Invasive plants have long been recognized for altering ecosystem properties, but their long-term impacts on processes remain largely unknown. In this study, we determined the impact of Egeria densa Planch, a globally invasive freshwater macrophyte, sedimentation in large tidal region. We measured carbon accumulation (CARs) and inorganic rates submerged aquatic vegetation SAV dominated by E. compared these to those adjacent marshes. Study sites were chosen along range hydrodynamic conditions Sacramento-San Joaquin Delta California, USA, where has widespread since 1990. Cores analyzed bulk density, % matter, organic carbon, 210Pb, 137Cs. Our results show that patches constitute sinks both "blue carbon" sediment. Compared marshes, greater (E. densa: 1103–5989 g m−2 yr−1, marsh: 393–1001 p < 0.01) vertical accretion 0.4–1.3 cm 0.3–0.5 0.05), similar CARs 59–242 C 109–169 > 0.05). Sediment stored likely reduces resilience marshes depleting sediment available marsh-building. Because its harmful traits, is not suitable candidate mitigating pollution; however, currently invaded habitats may already contain meaningful component regional budgets. strongly suggest are throughout global range, raising questions about how biogeochemical cycling dynamics across ecosystems.

Язык: Английский

Процитировано

26
Stochastic Simulation of the Suspended Sediment Deposition in the Channel With Vegetation and Its Relevance to Turbulent Kinetic Energy DOI
Liu Yang, Wenxin Huai, Yakun Guo

и другие.

Water Resources Research, Год журнала: 2021, Номер 57(9)

Опубликована: Авг. 30, 2021

Abstract The aquatic vegetation patch plays a significant role on sediment net deposition in the vegetated channels. Particularly, flow is decelerated at leading edge of that tends to induce vertical updraft, is, diverging region, which greatly affects pattern deposition. This study focuses simulation whole region through an innovative random displacement model, Lagrange method, with probability‐based boundary conditions, instead reflection or sorption channel bottom. probability model and resuspension proposed according field characteristics different regions patch. variation turbulent kinetic energy analyzed illustrate effect turbulence induced by vegetation, represented dimensionless ( ψ ), resuspension. predicted agrees well experimental measurements. Results show motions begins prevail when vegetation‐induced larger than its threshold, * . threshold be within 6.8–10 results this study. As increases, decreases continuously >

Язык: Английский

Процитировано

21
Spectral Wave Energy Dissipation by a Seagrass Meadow DOI Creative Commons
Nery Contti Neto, Ryan Lowe, Marco Ghisalberti

и другие.

Journal of Geophysical Research Oceans, Год журнала: 2025, Номер 130(3)

Опубликована: Март 1, 2025

Abstract Existing formulations for predicting wave dissipation by submerged canopies generally fall into three categories where (a) an empirical coefficient (energy factor) is attributed to the canopy ignoring its physical properties; (b) estimates of drag forces based on a bulk and undisturbed velocities above are used estimate dissipation; (c) flow theory account how modifications in‐canopy flows influence associated dissipation. We measured rates spectral across dense seagrass meadow comprised Posidonia australis in southwestern Australia, which also included high‐resolution measurements within canopy. These observations were quantify effectiveness different approaches predict observed The results showed that conventional do not and/or flexibility tend overestimate both frequency‐dependent Conversely, consider attenuation found improve predictions dissipation, particularly when accounting deflection flexible blades induced modifies effective height. show short period wind waves less attenuated than longer swell, explaining frequency dependency with shorter heights being more efficiently meadow.

Язык: Английский

Процитировано

0
Numerical investigation of seasonal wind-wave responses to severe seagrass decline in a coastal lagoon DOI Creative Commons

Arnaud LE. PEVEDIC,

Paul M. Bayle,

Alexandre Nicolae Lerma

и другие.

Coastal Engineering, Год журнала: 2025, Номер unknown, С. 104796 - 104796

Опубликована: Июнь 1, 2025

Язык: Английский

Процитировано

0
Role of suspended particulate material on growth and metal bioaccumulation in oysters (Crassostrea gigas) from a French coastal semi-enclosed production area, Arcachon Bay DOI Creative Commons
Tiphaine Chouvelon, Isabelle Auby,

Line Mornet

и другие.

Journal of Marine Systems, Год журнала: 2022, Номер 234, С. 103778 - 103778

Опубликована: Июнь 30, 2022

Язык: Английский

Процитировано

13
Contextualising shoreline protection by seagrass using lessons from submerged breakwaters DOI
Alice J. Twomey, David P. Callaghan, Katherine R. O’Brien

и другие.

Estuarine Coastal and Shelf Science, Год журнала: 2022, Номер 276, С. 108011 - 108011

Опубликована: Авг. 13, 2022

Язык: Английский

Процитировано

13
Spatial sedimentation and plant captured sediment within seagrass patches DOI Creative Commons
Aina Barcelona, Jordi Colomer, Teresa Serra

и другие.

Marine Environmental Research, Год журнала: 2023, Номер 188, С. 105997 - 105997

Опубликована: Апрель 23, 2023

Habitat degradation in coastal ecosystems has resulted the fragmentation of aquatic vegetation and compromised their role supplying essential ecological services such as trapping sediment or sequestering carbon. Fragmentation changed seagrass architecture by decreasing density canopy engendering small patches vegetated areas. This study aims to quantify different patch sizes with densities have spatial distribution within a patch. To this aim, two densities, four lengths, wave frequencies were considered. The amounts deposited onto bed, captured plant leaves, remaining suspension canopy, above used understand impact hydrodynamics on patterns patches. In all cases studied, reduced suspended concentrations, increased capture particles sedimentation rates bed. For lowest frequency studied (0.5 Hz), bottom was enhanced at edges, resulting heterogeneous patterns. Therefore, restoration preservation landscapes can help face future climate change scenarios where an increase mitigate predicted sea level rise

Язык: Английский

Процитировано

8