@article{fdi:010060682,
  title = {{M}apping changes in the largest continuous {A}mazonian mangrove belt using object-based classification of multisensor satellite imagery},
  author = {{N}ascimento, {W}. {R}. and {S}ouza, {P}. {W}. {M}. and {P}roisy, {C}hristophe and {L}ucas, {R}. {M}. and {R}osenqvist, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}apping and monitoring mangrove ecosystems is a crucial objective for tropical countries, particularly where human disturbance occurs and because of uncertainties associated with sea level and climatic fluctuation. {I}n many tropical regions, such efforts have focused largely on the use of optical data despite low capture rates because of persistent cloud cover. {R}ecognizing the ability of {S}ynthetic {A}perture {R}adar ({SAR}) for providing cloud-free observations, this study investigated the use of {JERS}-1 {SAR} and {ALOS} {PALSAR} data, acquired in 1996 and 2008 respectively, for mapping the extent of mangroves along the {B}razilian coastline, from east of the {A}mazon {R}iver mouth, {P}ara {S}tate, to the {B}ay of {S}ao {J}ose in {M}aranhao. {F}or each year, an object-orientated classification of major land covers (mangrove, secondary vegetation, gallery and swamp forest, open water, intermittent lakes and bare areas) was performed with the resulting maps then compared to quantify change. {C}omparison with available ground truth data indicated a general accuracy in the 2008 image classification of all land covers of 96% (kappa = 90.6%, tau = 92.6%). {O}ver the 12 year period, the area of mangrove increased by 718.6 km(2) from 6705 m(2) to 7423.60 km(2), with 1931.0 km(2) of expansion and 1213 km(2) of erosion noted; 5493 km(2) remained unchanged in extent. {T}he general accuracy relating to changes in mangroves was 83.3% ({K}appa 66.1%; tau 66.7%). {T}he study confirmed that these mangroves constituted the largest continuous belt globally and were experiencing significant change because of the dynamic coastal environment and the influence of sedimentation from the {A}mazon {R}iver along the shoreline. {T}he study recommends continued observations using combinations of {SAR} and optical data to establish trends in mangrove distributions and implications for provision of ecosystem services (e.g., fish/invertebrate nurseries, carbon storage and coastal protection).},
  keywords = {{ALOS} {PALSAR} ; {GIS} ; {JERS} ; mangroves ; synthetic aperture radar ; coastal changes ; {BRESIL} ; {AMAZONIE}},
  booktitle = {},
  journal = {{E}stuarine {C}oastal and {S}helf {S}cience},
  volume = {117},
  numero = {},
  pages = {83--93},
  ISSN = {0272-7714},
  year = {2013},
  DOI = {10.1016/j.ecss.2012.10.005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060682},
}