Simulated Estuary-Wide Response of Seagrass (Zostera marina) to Future Scenarios of Temperature and Sea Level

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: Oct. 21, 2020

Seagrass communities are a vital component of estuarine ecosystems, but threatened by projected sea level rise (SLR) and temperature increases with climate change. To understand these potential effects, we developed spatially explicit model that represents seagrass (Zostera marina) habitat estuary-wide productivity for Barnegat Bay-Little Egg Harbor (BB-LEH) in New Jersey, USA. Our modeling approach included an offline coupling numerical biomass the variable environmental conditions from hydrodynamic to calculate above belowground at each grid cell domain. Once calibrated represent present day annual productivity, applied combinations increasing air following regionally specific change projections, enabling analysis individual combined impacts variables on spatial coverage. Under SLR scenarios, current domain boundaries were maintained, as land surrounding BB-LEH is unlikely shift significantly future. caused extent decrease dramatically, pushing beds towards coastline depth, 100% loss maximum scenario. The dramatic under was part due assumption would not be inundated, did allow expansion outside bay. Temperature slightly elevated rate summer die-off decreased area only highest increase scenarios. In effects far outweighed increase. Sensitivity revealed greatest sensitivity changes parameters affecting light limitation mortality, no nutrient constants. high vulnerability bay exceeded demonstrated other systems, highlighting importance site- region-specific assessments estuaries

Language: Английский

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Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition

Frontiers in Marine Science, Journal Year: 2021, Volume and Issue: 8

Published: Sept. 28, 2021

Increases in seawater temperature and reduction light quality have emerged as some of the most important threats to marine coastal communities including seagrass ecosystems. Temperate seagrasses, Zostera marina , typically pronounced seasonal cycles which modulate growth, physiology reproductive effort. These marked temporal patterns can affect experimental responses climate change effects depending on seasons year experiments are conducted. This study aimed at evaluating how acclimatization modulates productivity biochemical warming irradiance reduction. Seagrass shoots were exposed different temperatures (6, 12, 16, 20, 24°C), combined with high (180 μmol photons m –2 s –1 ) low (60 conditions across four (spring: April, summer: July, autumn: November 2015, winter: January 2016). Plants exhibited similar growth rates between 16 20°C; 24°C, a drastic was observed; this more accentuated colder months under conditions. Higher leaf occurred winter while largest rhizomes reached conducted spring summer. induced significant polyunsaturated fatty acids (PUFA), particularly omega-3 ( n- 3 PUFA). Our results highlight that temperate populations currently living limitation will be favored by future increases sea surface terms rhizome productivity. Together from Z. region, wider review reported impacts indicates likely compounds nutritional importance for higher trophic levels leaves. further demonstrate data derived laboratory-based studies investigating environmental stress acclimation, their subsequent interpretation, strongly influenced seasonality situ precede any exposure.

Language: Английский

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Compensatory Mechanisms Absorb Regional Carbon Losses Within a Rapidly Shifting Coastal Mosaic

Ecosystems, Journal Year: 2023, Volume and Issue: 27(1), P. 122 - 136

Published: Sept. 15, 2023

Language: Английский

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Seasonal growth and senescence of seagrass alters sediment accumulation rates and carbon burial in a coastal lagoon

Limnology and Oceanography, Journal Year: 2022, Volume and Issue: 67(9), P. 1931 - 1942

Published: July 5, 2022

Abstract Seagrass meadows are important carbon sinks in the global coastal cycle yet also among most rapidly declining marine habitats. Their ability to sequester depends on flow–sediment–vegetation interactions that facilitate net deposition, as well high rates of primary production. However, effects seasonal and episodic variations seagrass density sediment accumulation have not been quantified. Understanding these dynamics provides insight into how responds disturbance events climate change. Here, we apply a spatially resolved transport model includes coupling flow, waves, resuspension meadow quantify meadow. Our results show organic were largely determined by they both changed non‐linearly function shoot density. While effectively trapped at edges during spring–summer growth seasons, winter senescence low‐density (< 160 shoots m −2 ) erosional with sensitive Small densities resulted large changes annual meadow; meadow‐scale (hundreds square meters) summer dieback due heatwaves can result erosion loss. findings highlight strong temporal spatial variability within implications for burial resilience stocks under future

Language: Английский

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Plant morphology and seed germination responses of seagrass (Zostera japonica) to water depth and light availability in Ailian Bay, northern China

Marine Environmental Research, Journal Year: 2020, Volume and Issue: 162, P. 105082 - 105082

Published: Aug. 11, 2020

Language: Английский

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