Influence of submarine groundwater discharge in the blue carbon budget of typical mangrove: A case study from the Zhenzhu Bay, Guangxi

Wang Yali; Zhang Fenfen; Chen Xiaogang; Li Linwei; Wang Xilong; Lao Yanling; Du Jinzhou

doi:10.3969/j.issn.0253-4193.2020.10.004

Volume 42 Issue 10

Nov. 2020

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Wang Yali，Zhang Fenfen，Chen Xiaogang, et al. Influence of submarine groundwater discharge in the blue carbon budget of typical mangrove: A case study from the Zhenzhu Bay, Guangxi[J]. Haiyang Xuebao，2020, 42(10)：37–46 doi: 10.3969/j.issn.0253-4193.2020.10.004

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Influence of submarine groundwater discharge in the blue carbon budget of typical mangrove: A case study from the Zhenzhu Bay, Guangxi

doi: 10.3969/j.issn.0253-4193.2020.10.004

Wang Yali^1
,,
Zhang Fenfen^{1
,
,},
Chen Xiaogang¹,
Li Linwei¹,
Wang Xilong²,
Lao Yanling^{2, 3},
Du Jinzhou^{1, 4}

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
2.
Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China
3.
College of Resource and Environment, Beibu Gulf University, Qinzhou 535011, China
4.
Institute of Eco-Chongming, Shanghai 202162, China

Received Date: 2020-01-09
Rev Recd Date: 2020-02-13

Available Online: 2020-11-13

Publish Date: 2020-10-25

Abstract

Abstract

As one of the forms of land-ocean interactions, submarine groundwater discharge (SGD) can release solutes into the coastal sea and has a significant impact on the nutrients budget in coastal seawater. Here, using ²²²Rn tracer, the SGD and the associated dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) inputted to the Zhenzhu Bay, a typical mangrove-dominated bay, were quantified. The results show that the average concentrations of ²²²Rn, DIC and DOC in groundwater are relatively higher than those in river water and surface sea water. A ²²²Rn mass balance implies that SGD rate is (0.36±0.36) m/d during January 2019. And SGD-derived DIC and DOC fluxes are estimated to be (2.41±2.63)×10⁷ mol/d and (1.96±2.20)×10⁶ mol/d. It confirmed that SGD-derived carbon is the most important carbon source in this bay, with 91% DIC and 89% DOC of the total input fluxes by SGD, respectively. Our results highlight the importance of groundwater-derived carbon fluxes in the Zhenzhu Bay, especially in the blue carbon assessments and biogeochemical process in tidal zones such as mangrove ecosystems.
- submarine groundwater discharge,
- ²²²Rn,
- mangrove,
- carbon budget,
- blue carbon

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References(53)

References

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