The development of leaf area and biomass in the whiteleaf manzanita (Arctostaphylos viscida Parry.) brushfields of southwest Oregon Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/kd17cw674

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Arctostanhylos viscida is a broad-leaved, evergreen, sclerophylbus shrub which grows in northern California and the Siskiyou Mountain region of southwest Oregon. After site disturbance, A. viscida competes with conifer regeneration, and may dominate a site for ninety years. This study examined the rate at which full site occupancy occurs in A. viscida brushfields in southwest Oregon, and estimated the amount of biomass and leaf area at several ages from 2 years to 16 years. It was found that full site occupancy (as indicated by canopy closure) could occur as early as six years after site disturbance, and at basal areas as low as 2200 mm2/m2. At this point, leaf area, biomass, and basal area accumulation began to level off. The maximum Ltd observed on plots of 6-year-old shrubs was 2.99. By 16 years old, maximum LAI had increased to 3.69. Examination of individual open-grown shrubs (which should provide estimates of the potential maximum LAI at a given age) showed that the maximum LAI's were very similar to those of fully occupied plots. Open-grown shrubs could reach a leaf area index greater than 3.5 by 4 years of age. Little change in maximum LAI occurred between 4 and 10 years. The close agreement between the LAI's of open-grown and stand-grown shrubs seems to indicate that the maximum LAI of whiteleaf manzanita communities between 6 and 16 years old is between 3.0 and 4.0. The rate of biomass accumulation slowed at the time of canopy closure. At 16 years old, mean leaf biomass was 1010 g/m2, and mean total aboveground biomass was 3176 g/m2. These figures are similar to those reported for other chaparral shrub species. Regression equations for estimating the biomass and leaf area of individual A. viscida, and of A. viscida communities, were developed. Logarithmically-transformed equations with trunk basal diameter as the dependent variable gave the most accurate estimates of individual shrub biomass and leaf area (r2 = 0.97 or 0.98). Community biomass and leaf area were most strongly correlated with basal area per square meter (r2 = 0.94 to 0.999).
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 2009-03-12T23:23:55Z No. of bitstreams: 1 Latt_Christopher_R_1984.pdf: 1347345 bytes, checksum: 57b8be207a09ce5cc4244c6574e213bd (MD5)
  • description.provenance : Made available in DSpace on 2009-03-16T21:56:31Z (GMT). No. of bitstreams: 1 Latt_Christopher_R_1984.pdf: 1347345 bytes, checksum: 57b8be207a09ce5cc4244c6574e213bd (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-03-16T21:56:31Z (GMT) No. of bitstreams: 1 Latt_Christopher_R_1984.pdf: 1347345 bytes, checksum: 57b8be207a09ce5cc4244c6574e213bd (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-03-16T21:55:20Z (GMT) No. of bitstreams: 1 Latt_Christopher_R_1984.pdf: 1347345 bytes, checksum: 57b8be207a09ce5cc4244c6574e213bd (MD5)

Relationships

In Administrative Set:
Last modified: 08/14/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items