Limits on aboveground net primary production, leaf area, and biomass in vegetational zones of the Pacific Northwest Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/rv042z14h

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Samples of mature vegetation from 8 of 12 major vegetational zones in Oregon and Washington, representing about 80% of the area of the two states, were studied along a latitudinal transect from the Pacific Coast to the east slopes of the Cascade Mountains. Six stands were in forest zones, one in woodland and one in the shrub-steppe. Aboveground net primary production (NPP, estimated as the sum of stem, branch, and foliage production) ranged from 0.3 to 14.7 t ha-1 yr-1, aboveground biomass from 3 to 1500 t ha-1, and area of all sides of leaves from 1 to 40 ha ha-1, with minimums in the shrub-steppe zone and maximums in the coastal forest zone. Average day air temperatures were less than -2°C only 2% of the winter at the coast, contrasted to 87% in the shrub-steppe. Although annual precipitation ranged from 20 cm in the shrub-steppe to 260 cm at the coast, it was a relatively poor predictor of stand structure and production. Maximum leaf areas were closely related to a simple growing season water balance in seven vegetational zones. In the subalpine conifer zone, leaf area appeared limited by temperature. Of the water balance components, evaporative demand alone accounted for 95% of the variance in leaf area. Biomass and NPP increased linearly with leaf area up to a leaf area of 20 ha ha-1. Biomass continued to increase with increasing leaf areas. NPP was also linearly related to minimum January temperatures. Except In the coastal forest zones, NPP for any given leaf area was less than maximum values reported for other mature systems elsewhere in the world.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Language
Digitization Specifications
  • PDF derivative scanned at 300 ppi (256 B+W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Anna Opoien (aoscanner@gmail.com) on 2009-02-20T00:50:13Z No. of bitstreams: 1 Gholz_Henry_Lewis_1979.pdf: 1022863 bytes, checksum: 3024920abd412e8b78f97b8707e62d40 (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-02-23T15:25:33Z (GMT) No. of bitstreams: 1 Gholz_Henry_Lewis_1979.pdf: 1022863 bytes, checksum: 3024920abd412e8b78f97b8707e62d40 (MD5)
  • description.provenance : Made available in DSpace on 2009-02-23T15:25:34Z (GMT). No. of bitstreams: 1 Gholz_Henry_Lewis_1979.pdf: 1022863 bytes, checksum: 3024920abd412e8b78f97b8707e62d40 (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-02-23T15:24:19Z (GMT) No. of bitstreams: 1 Gholz_Henry_Lewis_1979.pdf: 1022863 bytes, checksum: 3024920abd412e8b78f97b8707e62d40 (MD5)

Relationships

In Administrative Set:
Last modified: 10/20/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items