Biomass and carbon stocks in mangrove ecosystems of Kerala, southwest coast of India

Harishma, K. M.; Sandeep, S.; Sreekumar, V. B.

doi:10.1186/s13717-020-00227-8

Cited by 55 publications

(28 citation statements)

References 32 publications

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“…Indian mangroves host 46 true mangrove species, which represent about 56% of global mangroves species (Ragavan et al, 2016). Despite considerable work on the floristics and ecology, the inventory of carbon stocks in mangrove habitats of the Indian coast are scanty, and currently, only a few studies have reported the carbon stocks of these systems in Mainland India (Kathiresan et al, 2013(Kathiresan et al, , 2014Ray et al, 2013;Mitra & Gatti, 2015;Bhomia et al, 2016;Sahu et al, 2016;Suresh et al, 2017;Vinod et al, 2018;Gnanamoorthy et al, 2019;Banerjee et al, 2020;Harishma et al, 2020). Mangroves of the Andaman and Nicobar Islands (A & N Islands) are among the best in terms of density and growth in the country (Dagar et al, 1991;Mandal & Naskar, 2008;Ragavan et al, 2019) and accounts for an area of 616 km 2 ; out of which, 614 km 2 is in Andaman Islands with just 2 km 2 spread in Nicobar Islands (FSI, 2019).…”

Section: Introductionmentioning

confidence: 99%

Biomass and vegetation carbon stock in mangrove forests of the Andaman Islands, India

et al. 2021

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The present study estimated plant biomass in mangrove forests of the Andaman Islands, India. The mean above-ground biomass was 469.20 ± 41.25 Mega-gram/ha (Mg ha -1 ), while the mean belowground biomass was 166.78 ± 12.79 Mg ha -1 . The total mean biomass of Andaman mangrove forest was 635.98 ± 12.79 Mg ha -1 and its corresponding vegetation carbon stock was 290.26 ± 24.75 Mg C ha -1. Among the 6 forest divisions, Little Andaman recorded the highest mean biomass per unit area (1,081.26 ± 424.67 Mg ha -1 ) and vegetation carbon stock (494.50 ± 194.56 Mg C ha -1 ) followed by Middle Andaman, North Andaman, Havelock, South Andaman and Baratang. Among the 25 mangrove species, Rhizophora apiculata was found to contribute the highest biomass (152.78 Mg ha -1 ) and vegetation carbon stock (69.58 Mg C ha -1 ) followed by Bruguiera gymnorhiza, and Rhizophora mucronata. High vegetation carbon stock in mangrove forests of the Andaman Island could be attributed to high structural complexity, high precipitation rate ([ 300 cm year -1 ), and comparatively fewer anthropogenic disturbances in the mangrove forest of the Andaman Islands. However, the Andaman Islands are increasingly vulnerable to natural calamities, like sealevel rise and associated soil erosion and increasing frequency of tropical cyclones, which call for immediate attention on preserving the island mangroves to sustain its extraordinary carbon storage capacity.

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Section: Introductionmentioning

confidence: 99%

Biomass and vegetation carbon stock in mangrove forests of the Andaman Islands, India

et al. 2021

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“…A recent study also documented high carbon burial rates in the MCW and two other mangroves of the Ernakulam district (Rani et al, 2021). Another study also reported the high C storage capacity of the mangrove habitats in Kerala considering thirty sampling plots (Harishma et al, 2020). As there exists a large difference in the sedimentary carbon that was reported from the several mangrove stands of India, the present between seasons.…”

Section: Discussionmentioning

confidence: 86%

“…A recent study also documented high carbon burial rates in the MCW and two other mangroves of the Ernakulam district (Rani et al., 2021). Another study also reported the high C storage capacity of the mangrove habitats in Kerala considering thirty sampling plots (Harishma et al., 2020). As there exists a large difference in the sedimentary carbon that was reported from the several mangrove stands of India, the present study recommends the numerous mangroves patches (major and minor) present along the Indian coast, particularly along the Kerala coast, that were ignored in previous C studies, need to be assessed to completely understand the strength of Indian mangrove habitat sediments in holding C.…”

Section: Discussionmentioning

confidence: 89%

“…The most recent report on mangrove coverage in the state of Kerala considering its ten coastal districts put it at 17.82 km 2 (Preethy, 2019). These ecosystems hold a sizable volume of C which needs to be preserved and managed sustainably (Harishma et al., 2020). Among the coastal districts of Kerala, the Ernakulam district has the second largest mangrove habitat (covering 3.96 km 2 ).…”

Section: Introductionmentioning

confidence: 99%

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Carbon and nitrogen dynamics in a tropical mangrove along the southwestern coast of India

et al. 2021

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It is imperative to understand the carbon (C) and nitrogen (N) pools in tropical mangrove systems considering the diminished C storage potential and increasing nutrient loading in a global context due to rising anthropogenic disturbances. Here, we report that the Mangalavanam Coastal Wetland (MCW), a tropical mangrove stand, is a C-rich environment, with high sediment total organic carbon (70.35 ± 23.84 mg/g) and the δ 13 C (−26.56 ± 0.65‰) signatures indicate that the major source of carbon in the study area is from mangrove litter. The total nitrogen concentration in the sediment (3.78 ± 0.18 mg/g) was high despite the low N environment of mangrove ecosystems where the mangrove leaf litter was a major contributor to C. The sediment δ 15 N (7.70 ± 0.23‰) signatures indicated that the influence of anthropogenic N discharges and the contribution of marine algae were the primary cause of N enrichment. The mean δ 13 C and δ 15 N signatures of the mature mangrove leaves of the MCW were −28.66 ± 1.04‰ and 5.93 ± 0.65‰, respectively. The mangrove dweller crab Parasesarma plicatum was observed to have enriched δ 13 C (−23.78 ± 0.33‰) and δ 15 N (6.54 ± 0.35‰) signatures, indicative of a mixed dietary source. This study provides the impetus for ongoing conservation efforts to limit the loss of carbon storage and protect against the impact of anthropogenic nitrogen loadings on lowering the carbon and nitrogen emission potential for this system, which can have implications for other tropical mangrove systems as well.

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“…For such wetland types, carbon stock values of 7.9 to 65 kg C m −2 were reported; differences in carbon stock are related with the depth of soil measured. Carbon stocks observed in Mexican mangroves soils were higher than the carbon stocks reported on tropical mangroves of Kerela, India (13.9 kg C m −2 ) [ 47 ], Sofala, Mozambique (15.9 kg C m −2 ) [ 48 ] and Honduran mangroves (5.7–10.6 kg C m 2 ) [ 49 ]. Despite its good storage of carbon in the soil of Mexican mangroves, its extent has decreased almost 55% from 1970 to 2018 (1,420,000 ha to 775,555 ha) [ 50 ], mainly by land use change or conflict between cattle ranches and fishermen in mangrove areas [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

Carbon Fluxes and Stocks by Mexican Tropical Forested Wetland Soils: A Critical Review of Its Role for Climate Change Mitigation

Castro

Sandoval-Herazo

Ballut-Dajud

et al. 2020

IJERPH

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Wetland soils are important stores of soil carbon (C) in the biosphere, and play an important role in global carbon cycles in the response strategy to climate change. However, there areknowledge gaps in our understanding of the quantity and distribution in tropical regions. Specifically, Mexican wetlands have not been considered in global carbon budgets or carbon balances for a number of reasons, such as: (1) the lack of data, (2) Spanish publications have not been selected, or (3) because such balances are mainly made in the English language. This study analyzes the literature regarding carbon stocks, sequestration and fluxes in Mexican forested wetlands (Forest-W). Soil carbon stocks of 8, 24.5 and 40.1 kg cm−2 were detected for flooded palms, mangroves, and freshwater or swamps (FW) wetland soils, respectively, indicating that FW soils are the Forest-W with more potential for carbon sinks (p = 0.023), compared to mangroves and flooded palm soils. While these assessments of carbon sequestration were ranged from 36 to 920 g-C m−2 year−1, C emitted as methane was also tabulated (0.6–196 g-C m−2 year−1). Subtracting the C emitted of the C sequestered, 318.2 g-C m−2 year−1 were obtained. Such data revealed that Forest-W function is mainly as carbon sink, and not C source. This review can help to inform practitioners in future decisions regarding sustainable projects, restoration, conservation or creation of wetlands. Finally, it is concluded that Forest-W could be key ecosystems in strategies addressing the mitigation of climate change through carbon storage. However, new studies in this research line and public policies that protect these essential carbon sinks are necessary in order to, hopefully, elaborate global models to make more accurate predictions about future climate.

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Biomass and carbon stocks in mangrove ecosystems of Kerala, southwest coast of India

Cited by 55 publications

References 32 publications

Biomass and vegetation carbon stock in mangrove forests of the Andaman Islands, India

Biomass and vegetation carbon stock in mangrove forests of the Andaman Islands, India

Carbon and nitrogen dynamics in a tropical mangrove along the southwestern coast of India

Carbon Fluxes and Stocks by Mexican Tropical Forested Wetland Soils: A Critical Review of Its Role for Climate Change Mitigation

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