Carbonate system variation evidences the effect of seasonality in carbon uptake in a tropical seagrass meadow of South Caribbean

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 6, 2024

We explore the variation of carbonate system in water column over a seagrass meadow under ecological restoration and its correlation with Net Primary Production (NPP), Calcification (NC) Eutrophication, small coralline island within Seaflower International Biosphere Reserve, Colombian Caribbean. assessed one point another devoid seagrass, during dry rainy seasons. Dry season was characterized by higher levels pH_T (total scale), descending Dissolved Inorganic Carbon (C_T) along day, net fluxes carbon towards ocean. Rainy presented lower values variables not correlated hour meadow, while area CO2 atmosphere. NPP decreased 39% without 95% respect to season. NC registered 3.2x than These phenomena evidenced shift from column, strong remineralization process, loss sheltering function for calcifying organisms localized findings coincide previous evaluations island, which have shown rates growth organic accumulation sediment Possible explanations include import adjacent ecosystems influence cultural eutrophication. Our results suggest importance runoff eutrophication control protect sequestration ability improve outcome processes tropical seagrasses.

Language: Английский

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Hydrodynamic Modelling in a Mediterranean Coastal Lagoon—The Case of the Stagnone Lagoon, Marsala

Water, Journal Year: 2024, Volume and Issue: 16(18), P. 2602 - 2602

Published: Sept. 14, 2024

Coastal lagoons are important wetland sites for migratory species and the local flora fauna population. The Stagnone Lagoon is a coastal lagoon located on west edge of Sicily between towns Marsala Trapani. area characterized by salt-harvesting plants several archaeological affected microtidal excursion. Two mouths allow exchange with open sea: one smaller shallower in north larger deeper south. This study aims to understand lagoon’s hydrodynamics, terms circulation involved forces. process appears be dominated mainly tide excursions wind Wind velocity, water levels, velocity were recorded during different field campaigns order obtain benchmark value. hydrodynamic has been studied 2DH (two-dimensional horizontal plane) unstructured mesh model, calibrated data collected 2006 campaign validated 2007 campaign. Rapid changes averaged have found both Vx Vy components, showing strong dependence seiches. tries identify main factor that domains evolution circulation. Sensitivity analyses conducted estimate correct energy transfer forcing factors dissipating ones. A Gauckler–Strickler roughness coefficient 20 25 m1/3/s most representative lagoon. To enhance knowledge this peculiar lagoon, MIKE 21 model used, reproducing all external process. Nash–Sutcliffe efficiency (NSE) values up 0.92 0.79 reached equal related depth component. component NSE never satisfying, limits 2D approach currents induced morphological peculiarities. Comparing value depth, there loss 70% predictivity capability southern northern areas. support decision-makers improve management itself.

Language: Английский

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Monetary value of ecosystem services in unhealthy seagrass meadows in Indonesia

Ecosystem Services, Journal Year: 2024, Volume and Issue: 70, P. 101668 - 101668

Published: Oct. 14, 2024

Language: Английский

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What-If Nature-Based Storm Buffers on Mitigating Coastal Erosion

Published: Jan. 1, 2023

Creating ecosystem buffers in intertidal zones, such as seagrass meadows, has gained increasing attention a nature-based solution for mitigating storm-driven coastal erosion. This study presents what-if scenarios with an integrated model framework determining the effectiveness and schemes of planting to reduce The includes two levels simulation packages. first level is regional scale coupled hydrodynamic that simulates processes specific storm provides boundary forces morphodynamic XBeach apply at next level, which nearshore morphological evolution. applied open coast Norderney German Bight North Sea. We demonstrate optimizing location size meadows important increase efficiency onshore sediment erosion mitigation. For depth range, depending on intensity storm, most significant reduction may not be achieved by starting meadow permits largest size. To maintain protection effect, density stem height should considered whole reduced least 80% compared unprotected coast. valuable insights design implementation transplantation highlights importance considering location, size, density, when protection.

Language: Английский

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