Table 1.

Summary of datasets used in the study. (For additional details, refer to Supplementary Data Table S1).

Biome Type	ID	Sequencing Platform	Location	Depth of sample collection (cm below surface)	Source material for sequencing	Predominant contaminant/hydrocarbon	Reference
Urban	I1-I4	454 GS Junior	Assam, India	0–10 and 20–30	In situ soil	Crude oil	This study
Arctic	A1-A12	Ion Torrent PGM	USA, Canada, Norway, Russia, and Greenland	0–15	Treated microcosm sediment	Diesel oil	Bell et al.84
Urban	C1-C9	Illumina Miseq	Changqing and Daqing, China	2–10	In situ soil	Crude oil	Sun et al.85
Mangrove	M1-M3	454 GS FLX	Restinga da Marambaia, Rio de Janeiro, Brazil	0–20	Treated microcosm sediment	Crude oil	dos Santos et al.53
Marine sediment	DWH1-DWH7	Illumina	Gulf of Mexico	0–1#	In situ soil	Crude oil	Mason et al.54
Taiga	Tu1-Tu4	454 GS FLX	Walagan, Walagan North, Taiyuan, and Jiagedaqi, China	20–30	Treated microcosm sediment	Crude oil	Yang et al.13
Taiga	Tb1-Tb4	454 GS FLX	Walagan, Walagan North, Taiyuan, and Jiagedaqi, China	70–80	Treated microcosm sediment	Crude oil	Yang et al.13
Taiga	Tp1-Tp4	454 GS FLX	Walagan, Walagan North, Taiyuan, and Jiagedaqi, China	140–150	Treated microcosm sediment	Crude oil	Yang et al.13
Arctic	OSC1, OSC3-5, OSC7, OSC9, OSC12	454 GS FLX	Alberta, Canada	2,985–2,990	In situ soil	Oil sands bitumen	An et al.12
Arctic	OSTPu1-OSTPu4	454 GS FLX	Alberta, Canada	100–240	In situ soil	Bitumen and various other hydrocarbons	An et al.12
Arctic	OSTPm2, OSTPm4, OSTPm6	454 GS FLX	Alberta, Canada	610–750	In situ soil	Bitumen and various other hydrocarbons	An et al.12
Arctic	OSTPd1-OSTPd4	454 GS FLX	Alberta, Canada	1220–1370	In situ soil	Bitumen and various other hydrocarbons	An et al.12

^#All samples collected at an average of ~1500 metres below sea level, depth given is from the surface of the ocean floor.