Recovery Plan for the Northern Spotted Owl - DRAFT
Recovery Plan for the Northern Spotted Owl - DRAFT Recovery Plan for the Northern Spotted Owl - DRAFT
Stand A. No activities (west side 30-year-old stand)*293/8-14 NAN12-18 NA/15-23 153/18-27150 - I100 A AU-5001990 2010 2030 2050150 -100LL500~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~1990 2010 2030 2050Stand C. Moderate density regime (west side 30-year-old stand)*170/8-15 111/15-22 91/18-28 87/23-31Stand B. Low density regime (west side 30-year-old stand)* 100/9-12 70/20-28 50/28-38 49/36-150-- 100 ft501990 2010 2030 2050* Trees per acre/average diameter (inches) - diameter of largest 5 percentNA = Data not availableBlack crown = Douglas-firStand A. No treatmentor western hemlockStand B. Thinning and planting 1992, 201 1, and 2031White crown = otherStand C. Thinning 1992, and 201 1, and 2031A ^ shrubs Hardwood conifer speciesFigure G.8. A 30-year-old Douglas-fr/westem hemlock stand simulated with no treatments and with development under lowdensity and high density regimes. Numbers of trees per acre, average diameter, and diameter of the largest 5 percent of the treesare shown at each year. Note the increased crown and understory development as overstory tree density decreases (Oliver et aL1991).504
Figure G.9. A 70-year-old Douglas-fir/westem hemlock stand simulated with no treatments and with development of multiplecanopy and moderate density regimes. Number of trees per acre, average diameter, and diameter of the largest 5 percent of the treesare shown at each year. Note the increased crown and understory development as overstory tree density decreases (Oliver et al.1991).505
- 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
- Page 500 and 501: 484
- Page 502 and 503: area, structure, ages, location; ne
- Page 504 and 505: Stand AFigure G.2. A--unthmnned Dou
- Page 506 and 507: figure 0.3. Effects of thinning 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 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
- Page 542 and 543: 526
- Page 544 and 545: 528
- 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
- Page 552 and 553: II. General Economic Principles for
- Page 554 and 555: practices may be able to show how s
- Page 556 and 557: Economic patterns show the efficien
- Page 558 and 559: The sustainable yield concept that
- Page 560 and 561: A. Previously Estimated Economic Co
- Page 562 and 563: County receipts were estimated to d
- Page 564 and 565: B. Potential Social Costs of Owl Co
- Page 566 and 567: The contrast between the behavior d
- Page 568 and 569: 0U1 n1nDTable H.2. Economic depende
Stand A. No activities (west side 30-year-old stand)*293/8-14 NAN12-18 NA/15-23 153/18-27150 - I100 A AU-5001990 2010 2030 2050150 -100LL500~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~1990 2010 2030 2050Stand C. Moderate density regime (west side 30-year-old stand)*170/8-15 111/15-22 91/18-28 87/23-31Stand B. Low density regime (west side 30-year-old stand)* 100/9-12 70/20-28 50/28-38 49/36-150-- 100 ft501990 2010 2030 2050* Trees per acre/average diameter (inches) - diameter of largest 5 percentNA = Data not availableBlack crown = Douglas-firStand A. No treatmentor western hemlockStand B. Thinning and planting 1992, 201 1, and 2031White crown = o<strong>the</strong>rStand C. Thinning 1992, and 201 1, and 2031A ^ shrubs Hardwood conifer speciesFigure G.8. A 30-year-old Douglas-fr/westem hemlock stand simulated with no treatments and with development under lowdensity and high density regimes. Numbers of trees per acre, average diameter, and diameter of <strong>the</strong> largest 5 percent of <strong>the</strong> treesare shown at each year. Note <strong>the</strong> increased crown and understory development as overstory tree density decreases (Oliver et aL1991).504
Change language