Table 3. Mean impacted and control benthic foraminiferal densities (indiv./cm^{− 3}) from this study are presented with three previous records of total surface benthic foraminiferal densities (indiv./cm^{− 3}) collected at natural seep sites and along the continental slope of the northern Gulf of Mexico.

Record	Sample Description	Water depth (m)	Impacted Density (indiv./cm3)	Control Density (indiv./cm3)
This Study	DSH08 mean density:	1143	8.85	16.5
	impacted (0–10mm),
	control (10–45mm)
	PCB06 mean density:	1043	6.7	22.7
	impacted (0–10mm),
	control (10–45mm)
	NT1200 (control site)	1200	no impact	27.1
	mean density (0–50mm)
Sen Gupta and Aharon (1994)	core tops impacted from	500–700	4.35	n.d.
	natural seeps (1992)
Osterman	Unimpacted core tops from continental slope (2000)	900–1000	no impact	13.1
−2002
Rowe and Kenicutt (2009)	Unimpacted core top from	1850	no impact	29.1
	DeSoto Canyon site S36 (2000)