Assessing the blue carbon sequestration in the mangrove forests of Bushehr Province (Nayband and Melgonze)

Document Type : Research Paper

Author

Iranian National Institute for Oceanography and Atmospheric Science (INIOAS), Tehran, Iran

10.22059/jne.2023.351769.2495

Abstract

Mangrove forests have an important role in carbon dioxide stabilization and modification of increasing greenhouse gases and the human effects of global warming. The main purpose of this study is to eliminate the information gap of carbon storage in the mangrove forests of Bushehr province. In this study, the total carbon storage and the top 1 m, and total soil depth of soil as well as the carbon stored in mangrove trees in the mangrove forest of Bushehr Province (Nayband and Melgonze) were evaluated. The amount of sediment carbon in sediment cores and the diameter of breast height and height of trees were measured in 12 stations in the area. Satellite imagery showed that the area of the Nayband and Melgonze mangrove forests is 141 and 14 ha, respectively, 73% of which is high-density forest. The results showed that the average carbon content of the top 1m of Nayband and Melgonze mangrove forests is 158 and 190 tons per hectare (t ha-1) respectively, which is within the range of the global average in arid mangroves. The amount of carbon in the top 1m of Bushehr mangrove soil was estimated at 25000 tons, 89% of which is sequestered in Nayband mangroves. Soil and mangrove trees in the area have sequestered 59500 tonnes of carbon (equivalent to 218 tonnes of CO2) 28500 tonnes of which is stored in soil and the rest (31000 tonnes) is sequestered by mangrove trees. Estimates show that if the mangrove forests of the area are completely deforested, more than 155000 tons of carbon dioxide will re-mineralize into the atmosphere. Evaluating the carbon content of the total soil depth enabled us to estimate the total carbon content of mangrove habitats in Bushehr province for the first time.

Keywords

Alongi, D.M., 2012. Carbon sequestration in mangrove forests. Carbon management 3(3), 313-322.
Alongi, D.M., Murdiyarso, D., Fourqurean, J.W., Kauffman, J.B., Hutahaean, A., Crooks, S., Lovelock, C.E., Howard J., Herr D., Fortes M., Pidgeon E., 2016. Indonesia’s blue carbon: a globally significant and vulnerable sink for seagrass and mangrove carbon. Wetlands Ecology and Management 24(1), 3-13.
Askari, M., Homaei A., Kamrani E., Zeinali F., Andreetta A., 2021. Estimation of carbon pools in the biomass and soil of mangrove forests in Sirik Azini creek, Hormozgan province (Iran). Environmental Science and Pollution Research 29(16), 23712-23720.
Atwood, T.B., Connolly, R.M., Almahasheer, H., Carnell, P.E., Duarte, C.M., Lewis, C.J.E., Irigoien, X., Kelleway J.J., Lavery P.S., Macreadie P.I., Serrano O., 2017. Global patterns in mangrove soil carbon stocks and losses. Nature Climate Change 7(7), 523-528.
Danehkar, A., 1998. Sea sensitive areas of Iran. Journal of Environment 24, 28-38 (in Persian).
Donato, D.C., Kauffman, J.B., Murdiyarso D., Kurnianto S., Stidham M., Kanninen M., 2011. Mangroves among the most carbon-rich forests in the tropics. Nature Geoscience 4 (5), 293-297.
Elijah, W., Ramsey, I., Jensen, J.R., 1996. Remote sensing of mangrove wetlands: Relating canopy spectra to site-specific data. American Society of Photogrammetry and Remote Sensing 62(8), 939-948.
Ferreira, T.O., Queiroz, H.M., Nóbrega, G.N., de Souza, Júnior V.S., Barcellos, D., Ferreira, A.D., Otero, X.L., 2022. Litho-climatic characteristics and its control over mangrove soil geochemistry: A macro-scale approach. Science of the Total Environment 811, 152152.
Hamzeh, M.A., Farahi, S., 2020. Palaeoenvironmental changes in the Khuran Estuary of SE coastal Iran during the last two millennia, based on the analysis of a sediment core. Palaeogeography, Palaeoclimatology, Palaeoecology 542, 109563.
Hamzeh, M.A., Alizadeh, H., 2022. Soil and Vegetative Carbon Sequestration in Khuran Estuary Mangroves, Strait of Hormoz, During the Last 18 Centuries. Estuaries and Coasts 45(6), 1583-1595.
Hamzeh, M.A., Koochaknejad, E., Maghsudlu, A., Baskaleh, G.R., Ghaemi, M., Hamzei, S., Mehdinia, A., Aghadadashi V., 2022. Assessing the mangrove forests health in the Persian Gulf and Oman Sea. Research project. National Institute of Oceanography and Atmospheric Sciences and National Environment Fund. No: 1020571/9310 (In Persian).
Heiri, O., Lotter, A.F., Lemcke, G., 2001. Loss on ignition as a method for estimating organic and carbonate content in sediments: Reproducibility and comparability of results. Journal of Paleolimnology 25, 101-110.
Heumann, B.W., 2011. Satellite remote sensing of mangrove forests: Recent advances and future opportunities. Progress in Physical Geography 35(1), 87-108.
Howard, J., Hoyt, S., Isensee, K., Telszewski, M., Pidgeon, E., (eds.) 2014. Coastal blue carbon: Methods for assessing carbon stocks and emissions factors in mangroves, tidal salt marshes, and seagrasses. Conservation International, Intergovernmental Oceanographic Commission of UNESCO, International Union for Conservation of Nature. Arlington, Virginia, USA. 180 p.
Jamarani, S., Hajizadeh Zaker, N., 2016. Wave modeling in Nayband Bay. Journal of maritime transport industry 4, 51-57 (in Persian).
Kauffman, J.B., Heider, C., Cole, T.G., Dwire K.A., Donato, D.C., 2011. Ecosystem carbon stocks of Micronesian mangrove forests. Wetlands 31, 343-352.
Kauffman J.B., and Donato D.C., 2012. Protocols for the measurement, monitoring and reporting of structure, biomass and carbon stocks in mangrove forests. Working Paper 86. CIFOR, Bogor, Indonesia. 40p.
Komiyama, A., Poungparn, S., Kato, S., 2005. Common allometric equations for estimating the tree weight of mangroves. Journal of Tropical Ecology 21, 471-477.
Lee, S.Y., Hamilton, S., Barbier, E., Primavera, J.H., Lewis, I.I.I.RR., 2019. Better restoration policies are needed to conserve mangrove ecosystems. Nature Ecology and Evolution 3, 870-872.
Mahmoudi, M., Pourebrahim, S., Khorasani, N., Danehkar, A., Etemadi, H., Tanha Ziyarati, M., Moeinaddini, M., 2022. Carbon stock in three mangrove forests in north Persian Gulf. Environmental Earth Sciences 81(1), 1-14.
Ouyang, X., Lee, S.Y., 2020. Improved estimates on global carbon stock and carbon pools in tidal wetlands. Nature Communications 11(1), 1-7.
Quiros, T.A.L., Sudo, K., Ramilo, R.V., Garay, H.G., Soniega, M.P.G., Baloloy, A., Blanco, A., Tamondong, A., Nadaoka, K., Nakaoka, M., 2021. Blue carbon ecosystem services through a vulnerability lens: opportunities to reduce social vulnerability in fishing communities. Frontiers in Marine Science 8, 671753.
Ranjbari, R., 2006. Ecological Capability Assessment of Nay Band Coastal-Marine Park in Boushehr Province for Tourism by GIS, MSc Thesis of environment, Azad University of Tehran, Science and Research Unit, 190 p.
Rashvand, S., Safyari, Sh., Rashidi, J., 2000. Investigation of mangrove communities in the Persian Gulf. Research project. Research Center for Natural Resources and Livestock Affairs of Bushehr Province. No: 74-0310-0123000-10 (in Persian). 
Rashvand, S., Shirzad, N., 2013. Determining the geographical distribution and area of mangrove habitats in Bushehr province, the first national conference on sustainable agriculture and natural resources, Tehran (in Persian).
Sanders, C.J., Maher, D.T., Tait, D.R., Williams, D., Holloway, C., Sippo, J.Z., Santos, I.R., 2016. Are global mangrove carbon stocks driven by rainfall? J. Geophysical Research and Biogeoscience 121, 2600-2609.
Sarker, S., Masud‐Ul‐Alam, M., Hossain, M.S., Rahman Chowdhury, S., Sharifuzzaman, S.M. 2021. A review of bioturbation and sediment organic geochemistry in mangroves. Geological Journal 56(5), 2439-2450.
Wang, G., Guan, D., Zhang, Q., Peart, M.R., Chen, Y., Peng, Y., Ling, X., 2014. Spatial patterns of biomass and soil attributes in an estuarine mangrove forest (Yingluo Bay, South China). European Journal of Forest Research 133(6), 993-1005.
Zahed, M.A., Rouhani, F., Mohajeri, S., Bateni, F., Mohajeri, L., 2010. An overview of Iranian mangrove ecosystems, northern part of the Persian Gulf and Oman Sea. Acta Ecologica Sinica 30(4), 240-244.