The Role of Benthic TA and DIC Fluxes on Carbon Sequestration in Seagrass Meadows of Dongsha Island DOI Creative Commons

Lan‐Feng Fan,

E. Kang,

Mariche Natividad

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(11), P. 2061 - 2061

Published: Nov. 13, 2024

Coastal blue carbon ecosystems sequester carbon, storing it as plant biomass and particulate organic matter in sediments. Recent studies emphasize the importance of incorporating dissolved inorganic forms into assessments. As sediment-stored decomposes, releases (DIC) total alkalinity (TA), both which are critical for regulating partial pressure CO2 (pCO2) thus sequestration. This study investigated role benthic DIC TA fluxes sequestration within seagrass meadows Dongsha Island’s inner lagoon (IL) during winter summer seasons. Chamber incubation experiments revealed elevated compared to global averages (107 ± 75.9 119 144 vs. 1.3 1.06 mmol m−2 d−1 DIC, 69.7 40.7 75.8 81.5 0.52 0.43 TA). Despite being approximately 1.5 times higher than fluxes, water pCO2 levels remained low (149 26 156 18 µatm). Mass balance calculations further indicated that was predominantly reabsorbed through photosynthesis (−135 −128 d−1). Conversely, accumulated largely exported (−60.3 −53.7 d−1), demonstrating natural ocean enhancement (OAE). highlights crucial IL coastal net autotrophy carbonate dissolution. Future research should explore implications these processes assess potential OAE other ecosystems.

Language: Английский

Effect of marine anoxia on the conversion of macroalgal biomass to refractory dissolved organic carbon DOI

Lingyun Zhao,

Huawei Qin,

Mingliang Zhang

et al.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 204, P. 106956 - 106956

Published: Jan. 7, 2025

Language: Английский

Citations

0
Diluted swine and aquaculture wastewater enhance carbon sequestration and nutrient removal by the red seaweed Agardhiella subulata DOI Creative Commons

W. Sanjaya Weerakkody,

Hsueh-Han Hsieh,

Vicente G. Abedneko

et al.

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132327 - 132327

Published: March 1, 2025

Swine wastewater poses significant environmental challenges, and conventional microalgae treatments often leave high residual nutrients while consuming substantial freshwater. This study explored the potential of saltwater macroalgae Agardhiella subulata for nutrient removal carbon assimilation under varying salinity ammonium concentrations. Using diluted swine aquaculture wastewater, A. achieved phosphorus efficiencies up to 93 % 68 %, respectively, within 24 h. It also removed CO2 at rates five times higher than global forest average enhanced dissolved oxygen levels, reducing impact nutrient-rich minimizing freshwater demand. Notably, effectively utilized with ammonia concentrations 600 μM conditions 27-34 ppt. These results demonstrate large-scale reduction, providing a sustainable solution impacts livestock industry.

Language: Английский

Citations

0
The Role of Benthic TA and DIC Fluxes on Carbon Sequestration in Seagrass Meadows of Dongsha Island DOI Creative Commons

Lan‐Feng Fan,

E. Kang,

Mariche Natividad

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(11), P. 2061 - 2061

Published: Nov. 13, 2024

Coastal blue carbon ecosystems sequester carbon, storing it as plant biomass and particulate organic matter in sediments. Recent studies emphasize the importance of incorporating dissolved inorganic forms into assessments. As sediment-stored decomposes, releases (DIC) total alkalinity (TA), both which are critical for regulating partial pressure CO2 (pCO2) thus sequestration. This study investigated role benthic DIC TA fluxes sequestration within seagrass meadows Dongsha Island’s inner lagoon (IL) during winter summer seasons. Chamber incubation experiments revealed elevated compared to global averages (107 ± 75.9 119 144 vs. 1.3 1.06 mmol m−2 d−1 DIC, 69.7 40.7 75.8 81.5 0.52 0.43 TA). Despite being approximately 1.5 times higher than fluxes, water pCO2 levels remained low (149 26 156 18 µatm). Mass balance calculations further indicated that was predominantly reabsorbed through photosynthesis (−135 −128 d−1). Conversely, accumulated largely exported (−60.3 −53.7 d−1), demonstrating natural ocean enhancement (OAE). highlights crucial IL coastal net autotrophy carbonate dissolution. Future research should explore implications these processes assess potential OAE other ecosystems.

Language: Английский

Citations

2