Journal of Tropical Oceanography ›› 2012, Vol. 31 ›› Issue (4): 129-134.doi: 10.11978/j.issn.1009-5470.2012.04.018cstr: 32234.14.j.issn.1009-5470.2012.04.018

• Marine geomorphology • Previous Articles     Next Articles

Effects of introduction of Perinereis aibuhitensis and Sargassum hemiphyllum on nitrogen and phosphorus in overlying water

JIANG Xiao-tao1,2, TAN Ye-hui1, KE Zhi-xin1, HUANG Liang-min1   

  1. 1. Key Laboratory of Marine Bio-resources Sustainable Utilization (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; 
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-03-18 Revised:2011-05-26 Online:2012-10-22 Published:2012-10-24

Abstract:

This study discussed the effects on nitrogen and phosphorus in overlying water due to the introduction of Perinereis aibuhitensis and Sargassum hemiphyllum. Four and six individuals of Perinereis aibuhitensis were put into the recovery system (1.5 kg bottom mud, 6 L sea water and 10 g Sargassum hemiphyllum) as treatment groups 1 and 2, respectively. The results indicated that nitrogen and phosphorus in overlying water changed significantly after the treatment. After the first week of culturing, phosphate did not change obviously, but ammonification and nitrification were strengthened. Two months later, NH4+-N was reduced significantly, while nitrogen and phosphate increased compared with the control. Sargassum helped the uptake of nutrients in the overlying water, the wet weight of which increased 37%, 58% and 101% in group 1, group 2 and control, respectively. These results showed that the recovery system of six Perinereis aibuhitensis and 10 g Sargassum hemiphyllum could effectively improve the sediment environment.

Key words: polychaete worm, seaweed, sediment, bioturbation, nutrient, bioremediation

CLC Number: 

  • X171