Journal of Pure and Applied MicrobiologyVol. 8 No. May 2014 Special Edition

The Spatial Distribution of Sulfate-Reducing Bacteria and Its Environmental Implication in Sediment from Zhanjiang Bay and Leizhou Bay, China

Xiang-yun Zeng1, Feng Li1,3*, Yan-yan Liang1, Jin-qin Lin2, Hua-yang Gan2, Xiao-lin Long1, Kai Liang2, Xin Liu2, Zhen-hai Huo2, Jia-sheng Wen1, Jia-yu Yang4, Wen-rou Huang1 and Jue-ting Mo1

1School of Civil Engineering, South China University of Technology, Guangzhou - 510641, China. 2Guangzhou Marine Geological Survey, Guangzhou - 510760, China. 3Environmental Monitoring Center Station of Dongguan City, Dongguan - 523009, China. 4School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou - 510006, China.

Received on 12 April 2014 and accepted on 09 May 2014

 

ABSTRACT

The spatial distribution and environmental implication of sulfate-reducing bacteria (SRB) were investigated in the coastal sediments from Zhanjiang Bay and Leizhou Bay, China. The SRB existed in all over the sediments from Zhanjiang Bay and Leizhou Bay, and showed a high spatial variation. The counts of SRB in Zhanjiang Bay are much more than those in Leizhou Bay because Zhanjiang Bay was much more affected by human activity, whereas Leizhou Bay was protected as habitats. SRB counts increase from the outer area to inner in Zhanjiang Bay, mainly resulting from the fact that the inner area are influenced by anthropogenic frequency and has a low oxidation-reduction potential (Eh), whereas outer area is little influenced by anthropogenic and has a high Eh. Total organic carbon (TOC) content was not significantly positively correlated with SRB, but the tendency in the whole was that where there existed the higher TOC content, there would be the more counts of SRB. There was no significant relationship between SRB and particle size distribution (PSD) and Eh, whereas acid volatile sulfide (AVS) and the concentration of Fe (II) were significant positive correlated with SRB. It can be concluded that the distribution of SRB closely related to the concentration of Fe (II) and is an important cause for the spatial distribution of AVS, which is regarded as one of the key indicator of heavy metal bioavailability.

Keywords : Spatial Distribution; Sulfate Reducing Bacteria; Acid Volatile Sulfide (AVS); Environmental Implication; Geochemical Factors.