Impact of Intensive Land-Based Fish Culture in Qingdao, China, on the Bacterial Communities in Surrounding Marine Waters and Sediments

Table 1

Population size of various bacteria groups in sediment and water samples.

Sampling site	Total no. of heterotrophic bacteria (CFU/g or mL)	No. of ammonium-oxidizing bacteria (CFU/g or mL)	No. of nitrifying bacteria (CFU/g or mL)	No. of sulfate-reducing bacteria (cells/g or mL)	No. of nitrate-reducing bacteria (cells/g or mL)
Sediment of polluted sea area	6.70 ± 0.05 × 10^4	1.90 ± 0.01 × 10^3	9.80 ± 0.03 × 10^3	4.60 ± 0.04 × 10^2	1.20 ± 0.10 × 10^3
Sediment of unpolluted sea area	4.30 ± 0.10 × 10^3	1.50 ± 0.12 × 10^3	4.60 ± 0.14 × 10^3	2.30 ± 0.20 × 10^1	2.10 ± 0.03 × 10^3
Water of fish pond	1.25 ± 0.13 × 10^5	7.50 ± 0.01 × 10^2	4.40 ± 0.17 × 10^4	<3	4.30 ± 0.20 × 10^3
Water of effluent channel	1.29 ± 0.32 × 10^5	2.10 ± 0.05 × 10^2	4.90 ± 0.06 × 10^3	<3	1.50 ± 0.09 × 10^4
Water of polluted sea area	1.23 ± 0.15 × 10^4	6.20 ± 0.08 × 10^2	4.60 ± 0.09 × 10^3	7.50 ± 0.21 × 10^1	1.10 ± 0.05 × 10^3
Water of unpolluted sea area	1.60 ± 0.08 × 10^3	4.00 ± 0.20 × 10^1	1.00 ± 0.05 × 10^2	<3	9.00 ± 0.15 × 10^2