TABLE 3.

Bacterial and protozoan density in the top 1 cm of sediment at different water depths

Depth (m)	Total density (Mean ± SDa)		Estimated concn (μg g−1)				Contribution of M-DNAb
	Bacteria (108)	Protozoa (105)	Bacterial		Protozoan		M-DNA/S-DNA	M-DNA/F-DNA	M-DNA/H-DNA	M-RNA/S-RNA	M-RNA/F-RNA	M-RNA/H-RNA
			DNA	RNA	DNA	RNA
40	2.34 ± 0.24	8.53 ± 4.41	0.77	0.98	2.73	3.75	9	19	9	16	83	20
100	3.48 ± 0.43	11.91 ± 0.77	1.15	1.46	3.81	5.24	13	16	13	35	27	69
200	3.4 ± 1.08	14.35 ± 5.84	1.12	1.43	4.59	6.31	15	112	17	38	146	129
500	2.88 ± 0.63	10.99 ± 1.84	0.95	1.21	3.52	4.84	27	154	14	119	168	209
700	3.29 ± 0.33	11.96 ± 0.82	1.09	1.38	3.83	5.26	14	59	15	302	89	237
900	2.22 ± 0.49	11.24 ± 2.01	0.73	0.93	3.60	4.95	11	117	17	735	88	218
1,540	1.02 ± 0.11	8.86 ± 1.03	0.34	0.43	2.84	3.90	26	151	9	1,082	92	333
Avg	2.66	11.12	0.88	1.12	3.56	4.89	16	90	13	332	99	174

^aCalculated without log transformation. 

^bContribution of microbial DNA (M-DNA as sum of bacterial and protozoan DNAs) and microbial RNA (M-RNA as sum of bacterial and protozoan RNAs) to the total DNA and RNA pools determined by the three methods: S-DNA and S-RNA (spectrophotometric); F-DNA and F-RNA (fluorometric); and H-DNA and H-RNA (HPLC). Values are expressed as percentages.