Table I.

Sampling area of origin and culturing conditions of the foraminifera specimens included in the study

Species	ID	Year	Origin	t (°C)	pH	Salinity	Day	Structure	Figure
N. incompta	B-h2	2018	Norwegian Sea	6	–	31	13–18	Root	Fig. 1
N. pachyderma	89	2021	Greenland Sea	5	8	34.8	18	Root	Fig. 2e
N. pachyderma	295	2021	Greenland Sea	5	8	34.8	11	Root	Fig. 2f
N. pachyderma	254	2021	Greenland Sea	5	8	34.8	4	Filopodia-like	Fig. 2d
N. pachyderma	4	2021	Greenland Sea	6	7.8	35	40	Twig-like	Fig. 2b
N. pachyderma	15	2021	Greenland Sea	2	8.1	35	21	Twig-like	Fig. 2a
N. incompta	B-h1	2018	Norwegian Sea	6	-	31	12	Root fragment	Fig. 2c
N. pachyderma	9	2021	Greenland Sea	6	8.1	36.7	26	Filopodia-like	Fig. 3
N. pachyderma	11	2021	Greenland Sea	6	8.1	32.1	16	Twig-like	Supplementary Fig. 1c–d
N. pachyderma	257	2022	Baffin Bay	5	8	34.8	11	Twig-like	Fig. 4
G. bulloides	Gc100_18	2022	Norwegian Sea	10	8.1	35	18	Twigs	Fig. 5
N. pachyderma	C250	2021	Greenland Sea	6	8.1	35	17	Root and filopodia-like	Supplementary Fig. 1b
N. pachyderma	12	2021	Greenland Sea	9	8.1	35	4	Twig-like	Supplementary Fig. 1a