Web of Science: 20 cites, Scopus: 21 cites, Google Scholar: cites,
Losses of Soil Organic Carbon with Deforestation in Mangroves of Madagascar
Arias Ortiz, Ariane (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Masqué Barri, Pere (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Glass, Leah (Blue Ventures Conservation (Madagascar))
Benson, Lisa (Centre for Environment, Fisheries and Aquaculture Science (Regne Unit))
Kennedy, Hilary (Bangor University (Regne Unit))
Duarte, Carlos M.. (King Abdullah University of Science and Technology)
Garcia-Orellana, Jordi (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Benitez-Nelson, Claudia (University of South Carolina)
Humphries, Marc S. (University of the Witwatersrand (Johannesburg, Sud-àfrica))
Ratefinjanahary, Ismaël (Blue Ventures Conservation (Madagascar))
Ravelonjatovo, Jaona (Blue Ventures Conservation (Madagascar))
Lovelock, Catherine E. (University of Queensland (Austràlia))
Universitat Autònoma de Barcelona. Departament de Física

Data: 2020
Resum: Global mangrove deforestation has resulted in substantial CO2 emissions to the atmosphere, but the extent of emissions from soil organic carbon (C) loss remains difficult to assess. Here, we sampled five intact and five deforested mangrove plots from Tsimipaika Bay, Madagascar, to examine the loss of soil C in the 10 years since deforestation. We estimated tree biomass and analyzed grain size, 210Pb activities, organic C and total nitrogen (N) and their stable isotopes in soils as well as dissolved organic C in surface waters. Deforested soils revealed evidence of disturbance in the upper 14 g cm−2 (~40 cm) when compared to reference intact soils, indicated by lower porosity, higher dry bulk density, an order of magnitude higher soil mixing and loss of C and N despite no significant soil erosion. Although C loss from biomass was unequivocal and was estimated at 130 Mg C ha−1, the C loss from soils was more difficult to assess given the large heterogeneity of intact forest soils. We estimated that the loss of C due to mangrove clearing and soil exposure over 10 years was equivalent to about 20% of the upper meter soil C stock, and about 45% of the C stock accumulated during the last century. Soil C loss rate was 4. 5 times higher than the C sequestration rate in reference intact soils. These results emphasize the importance of mangrove conservation for CO2 emissions mitigation, as they suggest that deforestation-C losses will take substantially longer to offset with mangrove restoration.
Ajuts: Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1588
Ministerio de Economía y Competitividad MdM-2015-0552
Nota: Unidad de excelencia María de Maeztu CEX2019-000940-M
Nota: Altres ajuts: "Obra Social la Caixa" (LCF/BQ/ES14/10320004) i Blue Forest Project Australian Research Council LIEF Project (LE170100219)
Drets: Tots els drets reservats.
Llengua: Anglès
Document: Article ; recerca ; Versió acceptada per publicar
Matèria: Mangroves ; Deforestation ; Soil carbon ; Soil disturbance ; CO2 emissions ; Madagascar
Publicat a: Ecosystems, vol. 24 (April 2020) p. 1-19, ISSN 1435-0629

Dades de recerca relacionades amb l'article: https://ddd.uab.cat/record/216456
DOI: 10.1007/s10021-020-00500-z

41 p, 1.3 MB

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 Registre creat el 2020-04-07, darrera modificació el 2022-11-23

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