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- Title
Spatial distribution patterns of heterotrophic, nitrogen, and phosphate bacteria in hypoxic zone of Yangtze River Estuary.
- Authors
DU Ping, LIU Jing-jing; ZENG Jiang-ning; CHEN Quan-zhen; JIANG Zhi-bing; ZHU Xu-yu
- Abstract
In August 15-28, 2009, a preliminary study was conducted on the spatial distribution characteristics of heterotrophic bacteria ( HB) , inorganic phosphate bacteria (IPB) , organic phosphate bacteria ( OPB) , denitrifying bacteria ( DB) , and ammonifying bacteria ( AB) in the hypoxic zone of Yangtze River Estuary. In the water surface, water bottom, and sediment surface of the zone, the average quantity of AB was the largest, being 307.52 × 10 ceLs ∙ L , 184.50 × 10 ceLs ∙ L-1 , 199. 97 × 102 ceLs ∙ gL-1 , followed by that of HB (87. 35 × 104 cfu ∙ L-1 , 86. 85 × 104 cfu ∙ L-1, and 19. 56 × 102 cfu ∙ gL-1) , and of OPB (19. 26 × 104 cfu ∙ L-1, 18. 82 × 104 cfu ∙ L-1, and 19. 56 × 10 cfu ∙ g-1 , respectively). IPB was only observed within the Yangtze Estuary, south passage of the Estuary, and Zhoushan inshore, and its average quantity in the water surface, water bottom, and sediment surface was 18. 50 × 104 cfu ∙ L-1 , 31.00 x 104 cfu ∙ L-1 , and 7. 17 × 102 cfu ∙ g respectively. DB had a wide distribution, but its average quantity was low, being 3. 94 × 104 cells ∙ L-1 , 23. 08 × 104 cells ∙ L-1 , and 6. 22 × 102 ceLs ∙ gL-1 in the water surface, water bottom , and sediment surface, respectively. Salinity, NO3-N, PO4-P, SiO3-Si, and pH were the main factors affecting the distribution of HB, IPB, OPB, and DB in water body and sediment surface. The HB, IPB, and OPB in water bottom and sediment surface had significant positive correlation with water temperature; the HB and OPB in water bottom and the IPB in sediment surface were significantly positively correlated with dissolved oxygen ( DO) ; while the AB in sediment surface in was significantly negatively correlated with DO. Cluster analysis showed that hypoxia affected the bacterial community structure in sediment surface.
- Subjects
YANGTZE River Estuary (China); CHINA; HETEROTROPHIC bacteria; DENITRIFYING bacteria; RIVER ecology; SALINITY; WATER temperature; DISSOLVED oxygen in water
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2011, Vol 22, Issue 5, p1316
- ISSN
1001-9332
- Publication type
Article