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

Examining deforestation and agropasture dynamics along the Brazilian TransAmazon Highway using multitemporal Landsat imagery

Full text
Author(s):
Li, Guiying [1, 2] ; Lu, Dengsheng [1, 3, 2] ; Moran, Emilio [3] ; Calvi, Miqueias Freitas [4] ; Dutra, Luciano Vieira [5] ; Batistella, Mateus [6]
Total Authors: 6
Affiliation:
[1] Fujian Normal Univ, Sch Geog Sci, Fuzhou 350007, Fujian - Peoples R China
[2] Fujian Normal Univ, Fujian Prov Key Lab Subtrop Resources & Environm, Fuzhou 350007, Fujian - Peoples R China
[3] Michigan State Univ, Ctr Global Change & Earth Observat, E Lansing, MI 48823 - USA
[4] Fed Univ Para, Fac Forestry, BR-68372040 Altamira, PA - Brazil
[5] Natl Inst Space Res, Image Proc Div, BR-12245010 Sao Jose Dos Campos, SP - Brazil
[6] Brazilian Agr Res Corp Embrapa, Embrapa Agr Informat, Brasilia, DF - Brazil
Total Affiliations: 6
Document type: Journal article
Source: GIScience & Remote Sensing; v. 56, n. 2, p. 161-183, FEB 17 2019.
Web of Science Citations: 3
Abstract

This research aims to understand the difference of major land-cover change results caused in various time periods and to examine the impacts of human-induced factors on land-cover changes along the TransAmazon Highway region. The Landsat Thematic Mapper and Operational Land Imager data from 2011, 2014, and 2017 and our previous land-cover classification results in 1991, 2000, and 2008 were used to examine land-cover dynamics. A classification system consisting of five land-cover classes - primary forest (PF), secondary forest (SF), agropasture (AP), urban area, and water - were chosen. The hierarchical-based classification method was used to generate land-cover classification results, and the post-classification comparison approach was used to produce detailed ``from-to{''} conversions for each detection period. The emphasis was on deforestation of PF, dynamic change of SF and AP, and urbanization over time. The impacts of human-induced factors such as population and economic conditions on urban expansion, AP expansion, and deforestation were examined. This research indicated that selection of a suitable time period was critical for effectively detecting land-cover changes; that is, too long time period (i.e., 9 years) cannot accurately capture some land-cover changes such as the AP and SF in this research. Although deforestation - the conversion from PF to SF and AP - accounted for a large proportion of land-cover changes, the changes between SF and AP became more important than PF conversion, and required a short time period (i.e., 3 years here) for effectively reflecting their dynamics. Human-induced factors play important roles in deforestation, dynamic changes between AP and SF, and urbanization. (AU)

FAPESP's process: 12/51465-0 - Social and environmental processes that accompany the construction of Belo Monte hydroelectric dam, Altamira, PA
Grantee:Emilio Federico Moran
Support type: Research Projects - SPEC Program