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International Journal on Algae
SJR: 0.219 SNIP: 0.261 CiteScore™: 0.24

ISSN Imprimir: 1521-9429
ISSN On-line: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v10.i2.40
pages 141-162

Changes in relative abundance of phytoplankton in arsenic contaminated waters at the Ron Phibun district of Nakhon Si Thammarat province, Thailand

Weeradej Meeinkuirt
Mahidol University, Nakhonsawan Campus
W. Sirinawin
Division of Environmental Science, Faculty of Science, Ramkhamhaeng University, Bangkapi, 10240 Bangkok, Thailand
S. Angsupanich
Department of Aquatic Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
P. Polpunthin
Department of Biology, Faculty of Science, Prince of Songkhla University, Hat Yai, 90112 Songkhla, Thailand

RESUMO

This research project examines the changes in relative abundance of phytoplankton in arsenic contaminated waters at the Ron Phibun district of Nakhon Si Thammarat Province during July 2004 to June 2005. The chosen locations were four dredge ponds (abandoned tin mines) at Ron Phibun and Hintok sub-districts and two in dug ponds for community use at Saothong and Khuankoey sub-districts. The dominant phytoplankton in all study locations were cyanobacteria except for one location in the Saothong sub-district. The results demonstrated that there were major seasonal variations in phytoplankton abundance and in dominant genera associated with all sampling locations, and these were particularly evident during the rainy period. In general, all sampling locations showed a decrease in total abundance during the rainy season, but changes to the dominant population at any one location were different from all the others.