Table 1.

Lands managed by federal agencies, areas of individual ecosystems, and their changes as of 2050 from the baseline 2005 under IPCC SRES scenarios in the CONUS

Federal agency	IPCC scenario	Ecosystem and area, km2									%
		Croplands	Forests	Grasslands	Hay/pasture	Mech_ disturbed	Other	Shrublands	Wetlands	Total
BLM	Baseline (2005)	2,563	64,356	95,381	3,213	875	47,244	494,413	1,031	709,075	38.3
BOR		200	494	1,138	313	0	4,219	4,425	231	11,019	0.6
DOD		1,406	18,281	12,119	1,763	144	28,381	38,400	3,350	103,844	5.6
FS		7,213	557,150	95,900	11,375	7,956	23,075	127,700	18,750	849,119	45.8
FWS		2,681	4,744	5,694	1,350	63	9,356	18,125	12,781	54,794	3.0
NPS		244	32,550	8,738	431	38	17,094	44,975	6,944	111,013	6.0
Other		138	1,194	1,381	44	44	481	6,725	163	10,169	0.5
TVA		44	1,456	0	175	19	1,594	0	81	3,369	0.2
Sum		14,488	680,225	220,350	18,663	9,138	131,444	734,763	43,331	1,852,400	100
% of the total		0.8	36.7	11.9	1.0	0.5	7.1	39.7	2.3	100
2050, km2	Average*	19,429	668,721	216,729	23,798	15,467	135,013	729,863	43,381	1,852,400
†Change %		34.1	−1.7	−1.6	27.5	69.3	2.7	−0.7	0.1	0
2050, km2	A1B	22,856	662,350	213,981	28,694	18,913	136,338	726,194	43,075	1,852,400
†Change %		57.8	−2.6	−2.9	53.8	107.0	3.7	−1.2	−0.6	0
2050, km2	A2	20,144	664,325	217,231	24,875	16,856	135,700	730,106	43,163	1,852,400
†Change %		39.0	−2.3	−1.4	33.3	84.5	3.2	−0.6	−0.4	0
2050, km2	B1	15,288	679,488	218,975	17,825	10,631	133,000	733,288	43,906	1,852,400
†Change %		5.5	−0.1	−0.6	−4.5	16.3	1.2	−0.2	1.3	0

BLM, Bureau of Land Management; BOR, Bureau of Reclamation, Department of Interior; DOD, Department of Defense; FS, Forest Service; FWS, Fish and Wildlife Service; NPS, National Park Service; TVA, Tennessee Valley Authority.

^*The average of the results from all A1B, A2, and B1 scenarios.

^†Change percentage by 2050 from the baseline 2005 land area of the same ecosystem.