rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Northwest Forest Plan
    sub title: the first 25 years (1994-2018): status and trends of late-successional and old-growth forests
  name:
    name part: Davis, Raymond J.
    name part: (Biological scientist)
    role:
      role term: author.
  name:
    name part: Bell, David M.
    name part: (Research forester)
    role:
      role term: author
  name:
    name part: Gray, Andrew N.
    role:
      role term: author.
  name:
    name part: Gregory, Matthew J.
    role:
      role term: author
  name:
    name part: Yang, Zhiqiang
    name part: (Computer scientist)
    role:
      role term: author.
  name:
    name part: Healey, Sean P.
    role:
      role term: author.
  name:
    name part: Stratton, Andrew E.
    role:
      role term: author
  name:
    name part: Pacific Northwest Research Station (Portland, Or.)
    role:
      role term: issuing body.
  type of resource: text
  genre: bibliography
  genre: technical reports.
  genre: Technical reports.
  origin info:
    place:
      place term: oru
    date issued: 2022
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: 82 pages : illustrations (some color), maps (some color); 28 cm
  abstract: "This is the fourth in a series of periodic monitoring reports on the status and trends of late-successional and old-growth (LSOG) forests since the implementation of the Northwest Forest Plan (NWFP) in 1994. The objective of this monitoring is to evaluate the success of the plan in reaching its desired amount and distribution of LSOG forest on federal lands within the range of the northern spotted owl (Strix occidentalis caurina) in the United States. We began our assessment in the years shortly preceding the NWFP, but primarily focused on how LSOG forests have changed as a result of disturbance and forest succession since 1993, the year of the assessment that led to the implementation of the NWFP. We developed an annual time series (1986-2017) of LSOG maps based on an "old-growth structure index" (OGSI) using two age thresholds: ≥80 and ≥200 years. These ages represent when forests commonly attain stand structure associated with late-successional forests (OGSI 80) and old-growth forests (OGSI 200) in this region. Maps showed a slightly increasing trend in LSOG forests (OGSI 80) on federal lands with a 0.3-percent net gain between 1993 and 2017. Forest Inventory and Analysis plot data from two measurement/remeasurement periods (2000s and 2010s) were used to corroborate mapped estimates. For OGSI 80 and OGSI 200 forests, we estimated gross losses from wildfire at 6.2 and 6.9 percent, respectively; timber harvest losses at 1.9 and 2 percent, respectively; and loss from insects or other causes at 0.7 and 0.9 percent, respectively. This indicates that, at the NWFP scale, processes of forest succession compensated for losses. The NWFP anticipated a continued decline in LSOG forests for the first few decades until the rate of forest succession exceeds the rate of losses. Decadal gross losses of about 5 percent per decade from timber harvesting and wildfire (combined) were expected. Over the extent of the NWFP, observed losses from wildfire generally met expectations, but…
  note: Raymond J. Davis, David M. Bell, Matthew J. Gregory, Zhiqiang Yang, Andrew N. Gray, Sean P. Healey, and Andrew E. Stratton.
  note: Cover title.
  note: "September 2022."
  note: Includes bibliographical references (pages 82).
  subject:
    geographic code: n-usp--
  subject:
    topic: Old growth forests
    geographic: Northwestern States
  subject:
    topic: Forest succession
    geographic: Northwestern States
  subject:
    topic: Forest management
    geographic: Northwestern States
  subject:
    topic: Old growth forests
  subject:
    topic: Forest succession
  subject:
    topic: Forest management
  subject:
    geographic: United States
    geographic: Northwestern States
  classification: SD387.O43 N678 2022
  classification: SD11 .A4557 no. 1004
  classification: A 13.88:PNW-GTR-1004
  related item:
    title info:
      title: General technical report PNW ; 1004
  record info:
    record content source: NRC
    record creation date: 221122
    record change date: 20230404172930.4
    record identifier: in00004662845
    language of cataloging:
      language term: eng