Table 1. Areas of vegetative cover types in the Sierra Nevada, physiographic area 66. Forest coverages are taken from USFS FIA data, nonforest cover types are modified from USGS data. Habitat coverages with superscript * are combined from both databases by adding USGS coverage in the "nonforest" section of the USFS database.

Cover types

Area (ha)

Area (ac)

Percent of Total

Douglas fir forest

604,400

1,493,472

6.21

Chaparral forest

119,600

295,532

1.23

Redwood forest

10,400

25,698

0.11

Ponderosa pine forest *

3,269,700

8,079,429

33.60

Lodgepole pine forest *

806,700

1,993,356

8.29

Fir-spruce forest *

1,010,700

2,497,440

10.39

Mixed hardwood forest *

1,371,100

3,387,988

14.09

Pinyon pine-juniper forest *

568,300

1,404,269

5.84

Irrigated agriculture, wheat

11,100

27,428

0.11

Wheatgrass, bluestem grassland

57,300

141,588

0.59

Grama grassland

67,900

167,781

0.70

Annual grasses, manzanita

1,040,500

2,571,076

10.69

Sagebrush prairie

187,100

462,324

1.92

Greasewood brushland

187,100

462,324

1.92

Barren ground, sparse vegetation

18,900

46,702

0.19

Alpine tundra

214,900

531,018

2.21

Water *

154,200

381,028

1.58

Urban

32,600

80,555

0.33

 Totals

9,732,500

24,049,007

100