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Table 1 Total number of hectares disturbed per year, by disturbance type, for the US.

From: The LANDFIRE Refresh Strategy: Updating the National Dataset

   

Area disturbed per year by each disturbance type (ha)

 

Year

Biological

Chemical or herbicide

Development

Fire

Insects or disease

Silviculture

Unknown

Weather

Total

1999

0

24 380

690

2 565 741

218 770

236 533

1 212 286

59 213

4 317 613

2000

6

51 467

329

3 080 467

127 444

216 624

1 001 114

1 901

4 479 352

2001

5

89 150

1087

1 555 095

318 272

219 127

1 138 873

2 489

3 324 098

2002

68

108 629

145

3 001 186

185 693

225 215

959 352

62 733

4 543 021

2003

7

87 550

103

2 151 991

155 645

261 293

1 068 440

4 940

3 729 969

2004

0

95 108

218

3 701 915

364 508

302 183

1 113 701

914

5 578 547

2005

0

105 600

350

4 286 368

445 740

249 015

1 150 379

9 606

6 247 058

2006

69

52 099

130

4 390 539

388 165

256 065

990 026

4 082

6 081 175

2007

0

192 480

272

4 216 351

535 471

283 144

977 274

8 308

6 213 300

2008

105

124 968

74

2 358 701

605 314

153 493

1 344 627

24 720

4 612 002

Total

260

931 431

3 398

31 308 354

3 345 022

2 402 692

10 956 072

178 906

49 126 135