TABLE 1.

Characteristics of eukaryotic communities in six sediment samples obtained from the aquifer polluted by the Banisveld landfill^a

Sample	Distance from landfill (m)	No. of clones analyzed	No. of ARDRA types	Coverage (%)	Aerobic MPN	Anaerobic MPN	MPN-PCR
P1-3m	21	33	17	66	450	558	1,860
P1-5m	21	36	4	97	NDb	ND	760
P2-3m	30	43	13	81	ND	ND	3,000
P4-3m	48	37	9	95	1,260	558	86
P6-3m	68	42	4	98	ND	ND	1,860
C1-3m	Nonpolluted	32	4	97	138	138	860

^aSee Fig. 1 for locations. The numbers of clones and unique ARDRA types and the coverage were derived from analysis of clone libraries. MPN estimates were obtained by culturing (eukaryotic cells/g sediment) and by PCR-based, culture-independent MPN analysis (18S rRNA gene copies/g sediment).

^bND, not determined.