Temporal changes of mangrove vegetation boundaries in Amazônia: Application of GIS and remote sensing techniques
Marcelo C.L. Cohen
Rubén J. Lara
Abstract
The present work analyses a 25-year timeseries of radar and satellite images, andidentifies areas with losses and gains ofvegetation coverage along ∼166 km of Para'scoastline (North Brazil) and in the innerparts of the Bragança peninsula. Thegeomorphology of this region hassignificantly changed in recent years. Aresult of these changes has been a retreatof the mangrove vegetation along thecoastline, mainly due to landward sandmigration, which covers the mudflat andasphyxiates the vegetation. Image analysissuggests that the loss of vegetationcoverage has been the dominating process inthe last 25 years, occurring on ∼ 42% ofthe Bragança coastline and adjacentareas. Vegetation has remained stable along∼ 39% of the coastline, while mudsedimentation has allowed mangrovedevelopment along ∼ 19% of it. On the otherhand, during this period of time, mangroveshave invaded 3.4 km2 (∼ 38%) of theelevated herbaceous flats in the highestsectors of the Bragança peninsula.Despite other possible causes for mangrovedeath along the coastline, such as littoraldrift currents or cyclical changes incoastal sediment dynamics, the invasion ofmangrove into herbaceous elevated flats inthe central peninsula cannot be attributedto these factors. The current dynamics ofvegetation coverage change seem to becompatible with a long-term trend relatedto the predicted rates of sea-level rise.
Cohen M.C.L. and Lara R.J. (2003) Temporal changes of mangrove vegetation boundaries in Amazônia: Application of GIS and remote sensing techniques. 11(4): 223-231. 10.1023/A:1025007331075
@article{Cohen2003,
Title = {Temporal changes of mangrove vegetation boundaries in Amazônia: Application of GIS and remote sensing techniques},
Author = {Cohen, Marcelo C.L. and Lara, Rubén J.},
Editor = {},
Year = {2003},
Pages = {223-231},
Volume = {11},
Doi = {10.1023/A:1025007331075},
Abstract = {The present work analyses a 25-year timeseries of radar and satellite images, andidentifies areas with losses and gains ofvegetation coverage along ∼166 km of Para'scoastline (North Brazil) and in the innerparts of the Bragança peninsula. Thegeomorphology of this region hassignificantly changed in recent years. Aresult of these changes has been a retreatof the mangrove vegetation along thecoastline, mainly due to landward sandmigration, which covers the mudflat andasphyxiates the vegetation. Image analysissuggests that the loss of vegetationcoverage has been the dominating process inthe last 25 years, occurring on ∼ 42% ofthe Bragança coastline and adjacentareas. Vegetation has remained stable along∼ 39% of the coastline, while mudsedimentation has allowed mangrovedevelopment along ∼ 19% of it. On the otherhand, during this period of time, mangroveshave invaded 3.4 km2 (∼ 38%) of theelevated herbaceous flats in the highestsectors of the Bragança peninsula.Despite other possible causes for mangrovedeath along the coastline, such as littoraldrift currents or cyclical changes incoastal sediment dynamics, the invasion ofmangrove into herbaceous elevated flats inthe central peninsula cannot be attributedto these factors. The current dynamics ofvegetation coverage change seem to becompatible with a long-term trend relatedto the predicted rates of sea-level rise.},
}
TY - JOUR
AU - Cohen, Marcelo C.L.
AU - Lara, Rubén J.
TI - Temporal changes of mangrove vegetation boundaries in Amazônia: Application of GIS and remote sensing techniques
PY - 2003
SP - 223-231
VL - 11
DO - 10.1023/A:1025007331075
AB - The present work analyses a 25-year timeseries of radar and satellite images, andidentifies areas with losses and gains ofvegetation coverage along ∼166 km of Para'scoastline (North Brazil) and in the innerparts of the Bragança peninsula. Thegeomorphology of this region hassignificantly changed in recent years. Aresult of these changes has been a retreatof the mangrove vegetation along thecoastline, mainly due to landward sandmigration, which covers the mudflat andasphyxiates the vegetation. Image analysissuggests that the loss of vegetationcoverage has been the dominating process inthe last 25 years, occurring on ∼ 42% ofthe Bragança coastline and adjacentareas. Vegetation has remained stable along∼ 39% of the coastline, while mudsedimentation has allowed mangrovedevelopment along ∼ 19% of it. On the otherhand, during this period of time, mangroveshave invaded 3.4 km2 (∼ 38%) of theelevated herbaceous flats in the highestsectors of the Bragança peninsula.Despite other possible causes for mangrovedeath along the coastline, such as littoraldrift currents or cyclical changes incoastal sediment dynamics, the invasion ofmangrove into herbaceous elevated flats inthe central peninsula cannot be attributedto these factors. The current dynamics ofvegetation coverage change seem to becompatible with a long-term trend relatedto the predicted rates of sea-level rise.
ER -
