Journal of Pure and Applied MicrobiologyVol. 8 No. 2

Section Division of a Large River Main Stream Based on Bio-monitoring: A Case Study in the Dongjiang River, China

Ming Wang1, Bin Li2, Yang Yang1,3*, Jing Liu1, Yongmin Qiao1,3 and Li Li1

1Research Center of Hydrobiology, Jinan University, Guangzhou - 510 632, China. 2Department of Biological Science, Pusan National University, Pusan - 609 735, Korea. 3Ministry of Education, Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Jinan University, Guangzhou - 510 632, China.

Received on 09 January 2014 and accepted on 18 March 2014

 

ABSTRACT

The benthic diatom community and environmental factors were investigated in Dongjiang River, China. Section division of the main stream was then conducted by using diatoms based on these investigations. The value of bio-monitoring is also discussed. According to the benthic diatom and environmental factor data on 40 sites, the main stream was divided into 4 sections by using several analysis methods (clustering, multidimensional scaling (MDS), and self-organizing map (SOM)). The results of canonical correspondence analysis (CCA) showed the existence of a phosphorus restriction for the diatom community in the mid and downstream sections, while the distribution of diatom was mainly influenced by dissolved oxygen, pH, and geographical factors. A Biological Diatom Index (IBD) was also calculated, and the results showed that this type of section division meets the requirement of ecosystem health management in Dongjiang River.

Keywords : Dongjiang River, bio-monitoring, diatom, SOM, river section division, river management.