TABLE 3.

Shannon-Weaver diversity indexes calculated for DGGE profiles and numbers of DGGE bands detected^a

Sample	Shannon-Weaver diversity index	No. of DGGE bands (richness)
OR	1.24	20
OR2	1.06	18
OS	1.26	22
OS2	1.33	22
OS3	1.25	24
NOS	1.38	27
OR-Hx	0.91	11
OS-Hx	1.03	13
OR-PAH	0.46	6
OS-PAH	1.07	16

^aFrom Fig. 4 and 6. NOS, nonoiled sand; OS plus a number, oiled sand replicate; OR2, oiled rock replicate; OR-Hx, OR-PAH, OS-Hx, and OS-PAH, total DNA from bacteria growing at the highest dilutions in hexadecane (Hx) and aromatic (PAH) MPN analyses, respectively.