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Filtering by: Subject Forest reproduction -- Oregon Remove constraint Subject: Forest reproduction -- Oregon Advisor Perry, David A. Remove constraint Advisor: Perry, David A. Rights Statement Copyright Not Evaluated Remove constraint Rights Statement: Copyright Not Evaluated

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Fire history in three vegetation types on the eastern side of the Oregon Cascades

Creator:

Bork, Joyce L.

Abstract:

Historic fire return intervals in three different vegetation types dominated by ponderosa pine (Pinus ponderosa Laws.) were determined using fire scarred trees. Dendrochronological techniques were used to achieve accuracy in dating fire scars on samples collected from six 40 acre plots established in each site. Mean fire return intervals (MFRI)...

Resource Type:

Dissertation
Mycorrhiza formation and diversity in undisturbed forest and clearcut and burned areas in three forest types in Oregon

Creator:

Brainerd, Richard E.

Abstract:

A greenhouse bioassay was used to compare ectomycorrhiza formation and diversity in soils from undisturbed and clearcut and burned areas in moist mesic, moist montane and dry montane forest types representing a gradient of environmental harshness. It was hypothesized that mycorrhiza diversity decreases with increasing environmental harshness and that stability...

Resource Type:

Masters Thesis
Spatial characterization and analysis of forests in the Mount Bachelor volcanic chain, central Oregon

Creator:

Huang, Jing, 1964-

Abstract:

Forest spatial pattern is a primary interest of landscape ecology due to the relationships between spatial configuration of biotic components and ecological processes. The spatial pattern must be measured in meaningful ways so that relationships between forests and their environment can be analyzed. Aerial and satellite imageries provide ecologists a...

Resource Type:

Dissertation
Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades

Creator:

Velazquez-Martinez, Alejandro

Abstract:

The objectives of this research were to study: a) the effect of thinning and treatments consisting of pruning and multinutrient fertilization on aboveground biolnass increment, growth efficiency (GE), and foliar nutrients; b) the influence of topoedaphic variables (soil nutrients, slope, aspect, and rock content) and foliar nutrients on both leaf...

Resource Type:

Dissertation
Physical processes affecting soil biotic and abiotic responses to disturbance in forest ecosystems of southwestern Oregon

Creator:

Borchers, Jeffrey G.

Abstract:

The effect of physical factors such as soil structure, bulk density, parent material, and topographic variables on soil C and N dynamics and ectomycorrhizal inocululu potential in forests of southwest Oregon were investigated In the high-elevation white fir (Abies concolor (Gord. & Glend.) Lindl.) zone, two old poorly-vegetated clearcuts with...

Resource Type:

Dissertation
Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon

Creator:

Rojas-Melo, Nestor S.

Abstract:

Bioassays using red alder and snowbrush plants grown in soils collected from a clearcut, a young Douglas-fir plantation, and an old-growth stand were conducted. Sites are located at the Andrews Experimental Forest, Oregon. In the first bioassays, more alder than snowbrush plants survived and nodulated. Of the plants that survived,...

Resource Type:

Dissertation
Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades

Creator:

Egeland, Dawn M.

Abstract:

Douglas-fir and western hemlock growth and stocking were examined on two neighboring clear-cut watersheds in the Western Cascades of Oregon and related to the intensity of burning and logging disturbance, habitat type, soil type, aspect and the influence of percent cover of both invading Ceanothus species and residual Acer circinatum....

Resource Type:

Masters Thesis

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Academic Affiliation

Forest Science7

Advisor

Perry, David A.[remove]7

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1985 to 1998

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Committee Member

Cromack, Kermit2
Myrold, Dave2
Sollins, Phil2
Chen, Chaur-Fong1
Cromack, Kermit Jr.1
more Committee Members »

Creator

Borchers, Jeffrey G.1
Bork, Joyce L.1
Brainerd, Richard E.1
Egeland, Dawn M.1
Huang, Jing, 1964 1
more Creators »

Date

Date range begin – Date range end

Current results range from 1984 to 1998

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Decade

1990-19994
1980-19893

Degree Field

Forest Science6
Forest Ecology1

Degree Level

Doctoral5
Master's2

Degree Name

Doctor of Philosophy (Ph.D.)5
Master of Science (M.S.)2

Language

English [eng]7

Non-Academic Affiliation

Oregon State University. Graduate School7

Peer Reviewed

No6

Resource Type

Dissertation5
Masters Thesis2

Rights Statement

Copyright Not Evaluated[remove]7

Subject

Ectomycorrhizas -- Oregon2
Forest soils -- Oregon2
Ceanothus velutinus -- Oregon -- H.J. Andrews Experimental Forest1
Douglas fir1
Douglas fir -- Oregon -- Growth1
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