Linking eutrophication to carbon dioxide and methane emissions from exposed mangrove soils along an urban gradient

Barroso, Glenda Camila; Abril, Gwénaël; Machado, Wilson; Abuchacra, Rodrigo Coutinho; Peixoto, Roberta Bittencourt; Bernardes, Marcelo; Marques, Gabriela S; Sanders, Christian J.; Oliveira, Gabriela B; Filho, Silvio R de Oliveira; Amora, Leonardo; Marotta, Humberto

doi:10.1016/j.scitotenv.2022.157988

Cited by 22 publications

(5 citation statements)

References 111 publications

(149 reference statements)

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“…Lastly, several literature gaps are associated with the aforementioned index. First, an identified shortcoming is often the use of CO 2 to measure environmental degradation [42][43][44][45][46]. However, it has been discovered that this proxy does not reflect the whole of human activity and it is not comprehensive enough to represent the environment concerns.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Nexus of Renewable Energy, Ecological Footprint, and Economic Growth through Globalization and Human Capital in G7 Economics

et al. 2022

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This study used panel simultaneous equations models with a generalized method of moments (GMM) estimator to examine the three-way linkages between ecological footprint (EFP), renewable energy consumption (REC), and income in the Group of Seven (G7) countries over the period 1990–2018. The outcomes of this study demonstrate a two-way association between gross domestic product (GDP) and renewable energy. The findings confirm the presence of a bidirectional link between outcome and ecological footprint, as well as between EFP and renewable energy. The results of this study demonstrate that improving human capital positively and significantly effects income, environmental quality, and REC. Ecological footprint is not significantly impacted by economic and social globalization, whereas the impact of financial globalization is negative and significant. Trade openness is positively and significantly connected with REC and income, which could contribute to reducing environmental deterioration. In conclusion, we make policy recommendations that are based on the findings of the study.

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Section: Introductionmentioning

confidence: 99%

Exploring the Nexus of Renewable Energy, Ecological Footprint, and Economic Growth through Globalization and Human Capital in G7 Economics

et al. 2022

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“…Higher urbanization and eutrophic settings surrounding the microtidal mangrove ) compared to the pristine, mesotidal creek (Chynel et al 2022) also contribute to organic enrichment and increase pCO2 in the microtidal creek. Previous studies found that sediment-atmosphere CO2 fluxes were 3 times lower in the mesotidal creek (~120 mmol m -2 d -1 ) when compared to a nearby eutrophic mangrove (Barroso et al 2022), confirming that pristine mangroves emit less CO2 into the atmosphere than impacted/eutrophic systems. The dry soil-air flux found by Barroso et al (2022) is much higher than the average water-air CO2 emission (38 ± 31 mmol m -2 d -1 ) found by our study but comparable to the CO2 porewaterexchange rates in that system (110 ± 40 mmol m -2 d -1 ) or to the global average for mesotidal mangroves (92 ± 84 mmol m -2 d -1 , Table 5).…”

Section: Porewater-derived Versus Water-atmosphere Co2 Fluxesmentioning

confidence: 65%

Tidally driven porewater exchange and diel cycles control CO2 fluxes in mangroves

Cabral,

Yau,

Reithmaier

et al. 2024

Preprint

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Mangrove soils are highly enriched in organic carbon. Tidal pumping drives seawater and oxygen into mangrove sediments during flood tide and releases carbon-rich porewater during ebb tides. Here, we resolve semi-diurnal (flood/ebb tides), diel (day/night) and weekly (neap/spring tides) drivers of porewater-derived CO2 fluxes in two mangroves and update global estimates of CO2 emissions. Tidal pumping controlled pCO2 variability within the mangrove creeks. The highest values of pCO2 (2,585-6,856 µatm) and 222Rn (2,315-6,159 dpm m-3) and lowest values of pH (6.8-7.1) and dissolved oxygen (1.7-3.7 mg L-1) at low tides were due to enhanced porewater export. 222Rn and pCO2 in mangrove porewater were respectively 4-15 and 38-41 times greater than surface waters. pCO2 increased by 50±30% from high to low tide, 9±22% from day to night and 57±5% from neap to spring tide with clear changes on hourly, diel, and weekly time scales. Both porewater-derived CO2 and water-air outgassing increased with tidal amplitudes (r2 = 0.34, p < 0.05). Combining our new estimates with literature data, global porewater-derived (16 sites) and water-atmosphere (52 sites) CO2 fluxes in mangroves would be upscale to 45±12 and 41±10 Tg C y-1, respectively. These fluxes account for 25% of net primary production and 238% of sediment carbon burial rates in global mangroves. Overall, our local observations and global compilation suggest that porewater-derived CO2 exchange is a major but often unaccounted source of CO2 in mangroves – which can be emitted to the atmosphere or laterally exported to the ocean – and should be included in carbon budgets to solve global imbalances.

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“…Sedimentary δ 15 N has also been used to reconstruct the impact and historical changes of human activities on N accumulation. 17 , 55 For example, human sewage input, fertilizers, feces, and other allochthonous OM sources are usually enriched in the heavier 15 N. 56 In addition to the effects of N source input, δ 15 N signatures are often determined by complex biogeochemistry processes (including N fixation, remineralization, nitrification, volatilization, and denitrification). 57 Therefore, the increase in δ 15 N in recent sediments may be related to increased denitrification and inputs from aquaculture wastewater and farm runoff.…”

Section: Discussionmentioning

confidence: 99%

Human activity has increasingly affected recent carbon accumulation in Zhanjiang mangrove wetland, South China

Liu,

Bao,

Chen

et al. 2024

iScience

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Linking eutrophication to carbon dioxide and methane emissions from exposed mangrove soils along an urban gradient

Cited by 22 publications

References 111 publications

Exploring the Nexus of Renewable Energy, Ecological Footprint, and Economic Growth through Globalization and Human Capital in G7 Economics

Exploring the Nexus of Renewable Energy, Ecological Footprint, and Economic Growth through Globalization and Human Capital in G7 Economics

Tidally driven porewater exchange and diel cycles control CO2 fluxes in mangroves

Human activity has increasingly affected recent carbon accumulation in Zhanjiang mangrove wetland, South China

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