Table 1.

Description of samples and filters sequenced.

Sample ID	Sampling method	Site No.	Environment classification	Number of filters sequenced
SW-Niskin	Niskin	0	Non-vent field background (seawater)	1
Int-1-Niskin	Niskin	1	Vent field background (intra-field)	2
Int-1-lg-ESP Int-1-sm-ESP	D-ESP	1	Vent field background (intra-field)	1 >5 um (lg) 2 0.2–5 um (sm)
Int-2-Niskin	Niskin	2	Vent field background (intra-field)	3
Dif-2-Niskin	Niskin	2	Diffuse flow	1
Dif-3-Niskin	Niskin	3	Diffuse flow	2
Dif-4-Niskin	Niskin	4	Diffuse flow	2
Int-4-lg-ESP	D-ESP	4	Diffuse flow	2 > 5 um (lg)
Int-4-sm-ESP				4 0.2–5 um (sm)