| Texto completo | |
| Autor(es): |
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]
Número total de Autores: 9
|
| Afiliação do(s) autor(es): | [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
Número total de Afiliações: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Regional Environmental Change; v. 21, n. 3 SEP 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
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) | |
| Processo FAPESP: | 17/15331-3 - Alterações na ciclagem e acúmulo de C induzidos pela intensificação e diversificação do sistema de manejo da pastagem |
| Beneficiário: | Júnior Melo Damian |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 18/09845-7 - Implicações da expansão e intensificação do cultivo da cana-de-açúcar nos serviços ecossistêmicos do solo |
| Beneficiário: | Maurício Roberto Cherubin |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/21261-0 - Predição das alterações na ciclagem do carbono induzidas pela intensificação e diversificação dos sistemas de manejo de pastagem no Brasil |
| Beneficiário: | Júnior Melo Damian |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |