Table 1.

Location, sampling date, and characteristics of the sampled environments.

	Pole	Positiona	Date	Zoogenic inputb
Lake Domo*	Antarctic	−62.64 −60.97	03/02/2010	Very low
Lake Refugio*	Antarctic	−62.65 −61.00	03/02/2010	Next to sea elephant colony
Lake Limnopolar*	Antarctic	−62.66 −61.10	01/02/2010	Very low
Caleta Cierva	Antarctic	−64.16 −61.01	21/01/2010	Nearby seabird colonies
Green Island	Antarctic	−65.31 −64.15	23/01/2010	Accessible to seabirds
Biscoe Point	Antarctic	−65.43 −65.48	29/01/2011	Very low
Pourquoi-Pas Island	Antarctic	−67.66 −67.25	27/01/2011	Very low
Avian Island	Antarctic	−67.76 −68.88	25/01/2010	Nearby seabird colonies
Horseshoe Island	Antarctic	−67.84 −67.19	25/01/2011	Very low
IR2	Arctic	78.04 13.69	27/09/2011	Frequent seabird activity
Lake Tunsijøen(IR1)	Arctic	78.05 13.65	26/09/2011	Frequent seabird activity
Lake Nordammen(Svl1)	Arctic	78.63 16.63	05/06/2012	Accessible to seabirds
Lake Tenndamen(Svl2)	Arctic	78.10 15.03	06/06/2012	Accessible to seabirds

^aLat Long.

^bin situ observations.

^*Lakes in Byers Peninsula, Livingston Island.