Comparison of methane emissions among invasive and native mangrove species in Dongzhaigang, Hainan Island

He, Yixin; Guan, Wei; Xue, Dan; Liu, Liangfeng; Peng, Changhui; Liao, Baowen; Jian, Hu; Zhu, Qiuan; Yang, Yong; Wang, Xu; Zhou, Guanyi; Wu, Zhongming; Chen, Huai

doi:10.1016/j.scitotenv.2019.133945

Cited by 45 publications

(22 citation statements)

References 57 publications

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“…Since the pneumatophores can transport CH 4 from anaerobic deep soils, it is likely that the pneumatophores of Avicennia marina played a more important role than soil parameters in affecting soil CH 4 fluxes. Nevertheless, these results are inconsistent with other research which demonstrated that pneumatophores reduced CH 4 emissions [40,41]. The role of pneumatophores and the mechanisms of transporting CH 4 warrant further investigation.…”

Section: Discussioncontrasting

confidence: 87%

Methane Emissions from Subtropical and Tropical Mangrove Ecosystems in Taiwan

Lin

Kao

Chou

et al. 2020

Forests

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Mangroves are one of the blue carbon ecosystems. However, greenhouse gas emissions from mangrove soils may reduce the capacity of carbon storage in these systems. In this study, methane (CH4) fluxes and soil properties of the top 10 cm layer were determined in subtropical (Kandelia obovata) and tropical (Avicennia marina) mangrove ecosystems of Taiwan for a complete seasonal cycle. Our results demonstrate that CH4 emissions in mangroves cannot be neglected when constructing the carbon budgets and estimating the carbon storage capacity. CH4 fluxes were significantly higher in summer than in winter in the Avicennia mangroves. However, no seasonal variation in CH4 flux was observed in the Kandelia mangroves. CH4 fluxes were significantly higher in the mangrove soils of Avicennia than in the adjoining mudflats; this trend, however, was not necessarily recapitulated at Kandelia. The results of multiple regression analyses show that soil water and organic matter content were the main factors regulating the CH4 fluxes in the Kandelia mangroves. However, none of the soil parameters assessed show a significant influence on the CH4 fluxes in the Avicennia mangroves. Since pneumatophores can transport CH4 from anaerobic deep soils, this study suggests that the pneumatophores of Avicennia marina played a more important role than soil properties in affecting soil CH4 fluxes. Our results show that different mangrove tree species and related root structures may affect greenhouse gas emissions from the soils.

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Section: Discussioncontrasting

confidence: 87%

Methane Emissions from Subtropical and Tropical Mangrove Ecosystems in Taiwan

Lin

Kao

Chou

et al. 2020

Forests

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“…Recent studies have reported a significant amount of CH 4 flux from mangrove sediment [42][43][44][45][46][47][48][49] and have claimed that the contribution of CH 4 flux to global warming was non-negligible in estuarine mangrove forests, which could account for 18% to 22% of blue C burial rates [13] and 9% to 33% of plant CO 2 sequestration [50]. However, observed CH4 flux from mangrove soils is mostly negligible compared to CO 2 emissions from sediment but is highly variable [38][39][40][41][51][52][53][54][55][56][57][58], particularly for non-polluted mangrove sediment [21,49,[59][60][61][62]. To confirm this observation, the authors compared incubation experiments with mangrove sediment collected from the Vietnamese Mekong delta and the Indian Sundarbans forest [39].…”

Section: Significance Of Methane Emission From Mangrove Forestsmentioning

confidence: 99%

“…The above-mentioned studies have mainly focused on CH 4 emissions from water and sediment in mangrove forests, and CH 4 emission through stems, leaves, and pneumatophores from mangroves is poorly understood [41]. A positive correlation between the density of pneumatophores and CH4 flux is often found in various mangrove forest sediment [39,49,51,100].…”

Section: Mangrove Speciesmentioning

confidence: 99%

“…A positive correlation between the density of pneumatophores and CH4 flux is often found in various mangrove forest sediment [39,49,51,100]. However, some specific mangrove forest tree species such as Sonneratia apetala decrease CH 4 flux [41]. The presence of pneumatophores increased soil redox potential (Eh) and sulphate concentration in sediment in a Tanzanian mangrove forest, which suggests the inhibition effect of peumatophores on CH 4 emission [101].…”

Section: Mangrove Speciesmentioning

confidence: 99%

“…The gas species has become the second most important greenhouse gas in the atmosphere, contributing approximately 20% to global warming since the pre-industrial era [38]. The risk of further methane emission is due to mangrove sediment exposed to the above-mentioned anthropogenic impacts by stimulating related methanogens (i.e., CH 4 -producing microorganisms) and/or by inhibiting methanotroph (i.e., CH 4 -oxidizing microorganisms that contribute to lower the emission from the ecosystem) activity [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of Methane in Mangrove Forest: Will It Worsen with Decreasing Mangrove Forests?

Arai

Inubushi

Chiu

2021

Forests

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Mangrove forests sequester a significant amount of organic matter in their sediment and are recognized as an important carbon storage source (i.e., blue carbon, including in seagrass ecosystems and other coastal wetlands). The methane-producing archaea in anaerobic sediments releases methane, a greenhouse gas species. The contribution to total greenhouse gas emissions from mangrove ecosystems remains controversial. However, the intensity CH4 emissions from anaerobic mangrove sediment is known to be sensitive to environmental changes, and the sediment is exposed to oxygen by methanotrophic (CH4-oxidizing) bacteria as well as to anthropogenic impacts and climate change in mangrove forests. This review discusses the major factors decreasing the effect of mangroves on CH4 emissions from sediment, the significance of ecosystem protection regarding forest biomass and the hydrosphere/soil environment, and how to evaluate emission status geospatially. An innovative “digital-twin” system overcoming the difficulty of field observation is required for suggesting sustainable mitigation in mangrove ecosystems, such as a locally/regionally/globally heterogenous environment with various random factors.

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