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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Deforestation and land use change mediate soil carbon changes in the eastern Brazilian Amazon

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Author(s):
Damian, Junior Melo [1] ; Durigan, Mariana Regina [2] ; Cherubin, Mauricio Roberto [1] ; Maia, Stoecio Malta Ferreira [3] ; Ogle, Stephen M. [4] ; de Camargo, Plinio Barbosa [5] ; Ferreira, Joice Nunes [6] ; de Oliveira Junior, Raimundo Cosme [7] ; Cerri, Carlos Eduardo Pellegrino [1]
Total Authors: 9
Affiliation:
[1] Univ Sao Paulo, Luiz De Queiroz Coll Agr, Dept Soil Sci, BR-13418260 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Entomol & Acarol, BR-13418260 Piracicaba, SP - Brazil
[3] Inst Fed Educ Ciencia & Tecnol Alagoas, BR-57160000 Marechal Deodoro, AL - Brazil
[4] Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 - USA
[5] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13400970 Piracicaba, SP - Brazil
[6] Embrapa Amazonia Oriental, BR-66095100 Belem, Para - Brazil
[7] Embrapa Amazonia Oriental, Nucleo Medio Amazonas, BR-68035110 Santarem, PA - Brazil
Total Affiliations: 7
Document type: Journal article
Source: Regional Environmental Change; v. 21, n. 3 SEP 2021.
Web of Science Citations: 0
Abstract

Deforestation and land use change (LUC) to expand the agricultural frontier in the Brazilian Amazon deplete soil carbon (C) stocks, and negatively impact climate regulation. The variety of soil types, land-transition options, and management practices present in the Amazon region require detailed inventories to reduce the uncertainties associated with estimates of soil C change. Therefore, we conducted a study covering ca. 1 million hectares to estimate the soil C stock changes due to LUC in Paragominas and Santarem, Para state, eastern Brazilian Amazon, for the period of 1990-2010. Soil C stocks for 1990 were modeled based on land cover at the time. In 2010, we carried out a field work taking soil samples to measure soil C stock changes in 356 transects across contrasting land uses (logged and burnt forest, young secondary forest, intermediate secondary forest, old secondary forest, pasture, and cropland). The response ratios for the conversion from undisturbed forest to new land uses were calculated considering the differences in soil C stocks, with the undisturbed forest as reference. Between 1990 and 2010, LUC induced a total loss of 1.51 Tg C year(-1) (over an area of 7350 km(2)). For this period, the uncertainty of estimates was +/- 23.2%. The land transitions to pasture and cropland were the main drivers of soil C losses. Thus, deforestation contributes to climate change not only through losses of forest biomass but also subsequently soil C losses. These results can inform national and international climate change initiatives associated with LUC in the eastern Brazilian Amazon. (AU)

FAPESP's process: 17/15331-3 - Changes in cycling and accumulation of C induced by intensification and diversification of the pasture management system
Grantee:Júnior Melo Damian
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/09845-7 - Implications of expansion and management intensification on soil ecosystem services
Grantee:Maurício Roberto Cherubin
Support Opportunities: Regular Research Grants
FAPESP's process: 18/21261-0 - Prediction of the alterations in carbon cycling induced by the intensification and diversification of pasture management systems in Brazil
Grantee:Júnior Melo Damian
Support Opportunities: Scholarships abroad - Research Internship - Doctorate