Total plant species richness	Native plant species richness	Non-native plant species richness	Percentage non-native species	Island area (ha)	 Latitude	 Elevation (m)	Distance from mainland (km)	Distance from nearest island (km)	 Number of soil types	 Years since isolation	Years since deglaciation	 Human population	Human population density
Appledore Island	182	79	103	57	40	42.99	18	10.0	10.0	6	7000	12640	0	0.00
Bear Island	64	43	21	33	3	41.25	13	0.3	0.3	1	3800	15000	0	0.00
Block Island	661	396	265	40	2707	41.18	64	20.6	20.6	59	10000	15000	1010	0.37
Cuttyhunk Island	311	173	138	44	61	41.42	46	10.8	0.4	11	4700	14900	86	1.41
Fishers Island	920	516	404	44	1190	41.27	40	2.7	2.7	35	7200	15000	289	0.24
Gardiners Island	390	249	141	36	1350	41.08	37	6.7	6.7	37	5000	14950	0	0.00
Grand Manan Island	633	374	259	41	13600	44.75	122	17.5	17.5	-	14000	14000	2757	0.20
Gull Rock	34	15	19	56	4	44.96	10	13.2	1.0	-	11800	11800	0	0.00
Horse Island	107	75	32	30	4	41.24	10	1.9	0.3	1	8800	15000	0	0.00
Isle au Haut	641	370	271	42	1900	44.05	165	22.9	8.1	21	7500	13250	79	0.04
Kent Island	232	120	112	48	128	44.58	20	30.1	7.0	-	12000	12000	0	0.00
Machias Seal Island	72	24	48	67	10	44.50	6	17.7	17.7	-	11720	11720	0	0.00
Martha's Vineyard	979	605	374	38	13600	41.39	95	13.4	13.4	47	4700	15000	10760	0.79
Matinicus Rock	62	21	41	66	8	43.79	15	30.6	4.7	1	10500	12700	0	0.00
Mount Desert Island	1060	620	440	42	26668	44.33	466	0.3	0.3	74	5000	13350	10424	0.39
Muskeget Island	156	88	68	44	140	41.33	10	35.7	7.5	4	4700	15000	0	0.00
Nantucket Island	1166	625	541	46	10900	41.27	33	42.5	21.0	27	4700	15000	9520	0.87
Naushon Island	564	362	202	36	2300	41.47	53	8.6	8.6	18	4700	14900	0	0.00
Penikese Island	347	181	166	48	34	41.45	21	8.5	1.6	6	4700	14900	0	0.00
Tuckernuck Island	353	224	129	37	350	41.30	15	34.0	3.0	16	4700	15000	0	0.00
Whaleboat Island	163	99	64	39	47	43.76	23	1.3	1.3	4	7500	12540	0	0.00
Wooden Ball Island	155	69	86	55	46	43.86	19	27.4	4.3	2	10500	12620	0	0.00