Recovery Plan for the Northern Spotted Owl - DRAFT
Recovery Plan for the Northern Spotted Owl - DRAFT Recovery Plan for the Northern Spotted Owl - DRAFT
figure 0.3. Effects of thinning Douglas-ftr. Stands are about 40 years okld Photograph takennear Hoskins, Oregon (Curtis and Marshall 1986).G.3.A. (treatment 9) = no thinning. No understory: average tree diamneter at 4.5 feet is about 12inches.G.3.B. (treatment 7) = lightly thinned. Some understory development: average diameter is about18 inches.490
0.3.C. (treatment 1) = heavy thinning. Considerable understory: aver-age diameter about 20 inches.See Figure G.5 and G.6.Figure G.4. An unthinned,dense Douglas-fir standabout 70 years old, with nounderstory. Carefulthinning and making smallopenings. followed byestablishing shade-tole-ranttree species, would aid thedevelopment of amultistoried stand and owlhabitat. Thinnings atearlier ages would haveresulted in trees with largerdiameter stems, longercrowns, development of anunderstory, as well ascommercial wood production.491
- Page 456 and 457: continued-Common Name Causal Agent
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- Page 460 and 461: III. Forest Protection in theWest C
- Page 462 and 463: 120 100200 500I~~~~.K446Figure F.4.
- Page 464 and 465: InsectsDiseasesInsects in this subr
- Page 466 and 467: __hardwoods are immune. Shade toler
- Page 468 and 469: pests (Schowalter 1988). Black stai
- Page 470 and 471: tion and initial attack. If manipul
- Page 472 and 473: log and snag density was likely low
- Page 474 and 475: B. Management Effects on StandsMana
- Page 476 and 477: units (underburning or lop/scatter)
- Page 478 and 479: In the higher elevation White Fir a
- Page 480 and 481: growth often increases (Reinhardt a
- Page 482 and 483: 50rcc4*0-cC)2M CmZ13010-yearI ,...*
- Page 484 and 485: In the East Cascades subregion fore
- Page 486 and 487: The introduced disease, white pine
- Page 488 and 489: VI. Conclusionsmortality will resul
- Page 490 and 491: Baker, F.A. 1988. The influence of
- Page 492 and 493: Habeck, J.R. 1990. Old-growth ponde
- Page 494 and 495: Perry, D.A., and J.G. Borchers. 199
- Page 496 and 497: Weatherspoon, C.P., and C.N. Skinne
- Page 498 and 499: 482
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- Page 502 and 503: area, structure, ages, location; ne
- Page 504 and 505: Stand AFigure G.2. A--unthmnned Dou
- Page 508 and 509: II. Review of Natural Vegetation an
- Page 510 and 511: western hemlock, and sometimes othe
- Page 512 and 513: year intervals (Appendix F). With t
- Page 514 and 515: Live crown ratiobecent)6050IStand A
- Page 516 and 517: Basal area growth continued to incr
- Page 518 and 519: technology probably will allow some
- Page 520 and 521: Stand A. No activities (west side 3
- Page 522 and 523: Stand A. No activities (west side o
- Page 524 and 525: acre, 4 to 12 inches in diameter),
- Page 526 and 527: allow redwood sprout clumps maximum
- Page 528 and 529: KAge 15 years - 511 trees per acre,
- Page 530 and 531: 6Stems per acre100 _ Stand A. Natur
- Page 532 and 533: Basal Area(square feetper acre)50 1
- Page 534 and 535: * Opening the canopy in small patch
- Page 536 and 537: Drew, T.J. and J.W. Flewelling. 197
- Page 538 and 539: Miller, R.E.; D.L. Reukema, and R.L
- Page 540 and 541: Tappeiner, J.C., P.M. McDonald, and
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- Page 546 and 547: 6. Timber supply curve and economic
- Page 548 and 549: scientifically credible biological
- Page 550 and 551: E. Summary of Preliminary Estimates
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- Page 554 and 555: practices may be able to show how s
figure 0.3. Effects of thinning Douglas-ftr. Stands are about 40 years okld Photograph takennear Hoskins, Oregon (Curtis and Marshall 1986).G.3.A. (treatment 9) = no thinning. No understory: average tree diamneter at 4.5 feet is about 12inches.G.3.B. (treatment 7) = lightly thinned. Some understory development: average diameter is about18 inches.490
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