DISTRIBUTIVE CHANGE OF TYPICAL ECOSYSTEMS IN THE QUANG NINH COASTAL AREA

Nguyen Van Thao, Dang Van Bao, Tran Dinh Lan
Author affiliations

Authors

  • Nguyen Van Thao Institute of Marine Environment and Resouces-VAST
  • Dang Van Bao Institute of Marine Environment and Resouces-VAST
  • Tran Dinh Lan Institute of Marine Environment and Resouces-VAST

DOI:

https://doi.org/10.15625/1859-3097/13/4/3543

Keywords:

Mangrove, tidalflat, coral, seagrass, remote sensing, geographical information system (GIS)

Abstract

In this reseach, the remote sensing data combined to field survey data and existing results of reseaches were used to evaluate and analyse distribition change of the typical ecosystems in the Quang Ninh coastal area such as mangrove forest, tidal flat, coral reef and seagrass bed. During the 20 last years, these ecosystems have been reduced largely in the distributive area. About 7,253ha (25.2%) of  mangrove area and 10,425ha (21.5%) of tidal flat area were destroyed from 1990 - 2008. Without good and very good categories, the coral reefs in the Ha Long bay has lost over 30% number of speices, 20.5% number of genus and 70% of area. In the Co To Archipelago, the coral reefs were largely degraded on number of species (over 80%) and distributive area (over 90%) from 2000 - 2007 period. The seagrass ecosystem has been reduced, over 80% of distribution area, too. The seagrass was discovered before in some sites such as Dam Buon, Ha Coi and Dam Ha bay, but disappeared in 2009. The activities of aquaculture farm, ground filling and fishing by poison; and typhoons and floods are main causes to reduce the distributive area of these typical ecosystems.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Downloads

Published

26-12-2014

How to Cite

Thao, N. V., Bao, D. V., & Lan, T. D. (2014). DISTRIBUTIVE CHANGE OF TYPICAL ECOSYSTEMS IN THE QUANG NINH COASTAL AREA. Vietnam Journal of Marine Science and Technology, 13(4), 349–356. https://doi.org/10.15625/1859-3097/13/4/3543

Issue

Section

Articles

Most read articles by the same author(s)

<< < 1 2 3 4 > >>