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Interrelationships among northern flying squirrels, truffles, and microhabitat structure in Sierra Nevada old-growth habitat

Creator:: Pyare, Sanjay and Longland, William S.
Abstract:: During 1997–1998, we investigated the influence of both the relative abundance of truffles, preferred food items, and microhabitat structure on the occurrence of northern flying squirrels (Glaucomys sabrinus Shaw) in oldgrowth forest habitat of the Sierra Nevada Range, U.S.A. Following live-trapping sessions, we searched the forest floor for truffle diggings...
Resource Type:: Article
Full Text:: among the most important types of biologi- cal information incorporated into the forest conservation

Stem form and compression wood formation in young Pinus radiata trees

Creator:: Lachenbruch, Barbara, Droppelmann, Fernando, Balocchi, Claudio, Peredo, Miguel, and Perez, Erika
Abstract:: The crooked stems of some individuals of radiata pine (Pinus radiata D. Don) can hinder volume recovery and wood quality. To infer causes of crookedness and to learn how angle affects compression wood (CW) formation we studied 4+1-year old trees in southern Chile. Eight initially straight and 8 initially crooked...
Resource Type:: Article
Full Text:: complex effect on CW extent. In 2- to 3-year-old wood there was no meaningful effect of angle on CW extent

Interaction of vegetation control and fertilization on conifer species across the Pacific Northwest

Creator:: Rose, Robin and Ketchum, J. Scott
Abstract:: An experiment evaluating three levels of vegetation competition control (no control, 1.5 m2 of vegetation control, and 3.3 m2 of vegetation control), each with two fertilization treatments (fertilization at the time of planting with complete slow-release fertilizer (Woodace® IBDU), or no fertilization), was installed at five sites. Two of these...
Resource Type:: Article
Full Text:: experiment evaluating three levels of vegetation competition control (no control, 1.5 m2 of vegetation

Predictive mapping of forest composition and structure with direct gradient analysis and nearest-neighbor imputation in coastal Oregon, U.S.A.

Creator:: Ohmann, Janet L. and Gregory, Matthew J.
Abstract:: Spatially explicit information on the species composition and structure of forest vegetation is needed at broad spatial scales for natural resource policy analysis and ecological research. We present a method for predictive vegetation mapping that applies direct gradient analysis and nearest-neighbor imputation to ascribe detailed ground attributes of vegetation to...
Resource Type:: Article
Full Text:: . Gregory Abstract: Spatially explicit information on the species composition and structure of forest

Leaf litter chemistry controls on decomposition of Pacific Northwest trees and woody shrubs

Creator:: Valachovic, Y. S., Caldwell, B. A., Cromack Jr., K., and Griffiths, Robert P.
Abstract:: The effects of initial leaf litter chemistry on first-year decomposition rates were studied for 16 common Pacific Northwest conifers, hardwoods, and shrubs at the H.J. Andrews Experimental Forest in western Oregon. Leaf litters were analyzed for C, N, P, K, Ca, Mg, proximate organic fractions (nonpolar, polar, acid-hydrolyzable extractives, acid-hydrolyzable...
Resource Type:: Article
Full Text:: (no other variables provided ex- planation of any more variability). Each independent vari- able was

Diversity and productivity of hypogeous fungal sporocarps in a variably thinned Douglas-fir forest

Creator:: Colgan, Wesley, Carey, Andrew B., Trappe, James M., Molina, Randy, and Thysell, David
Abstract:: Although ecosystem management techniques are designed to enhance species diversity in managed forests, no comprehensive study has been conducted to evaluate effects of such techniques on diversity and productivity of hypogeous fungi (truffles). During this study, truffles were collected in a 55- to 65-year-old Douglas-fir forest from March 1993 through...
Resource Type:: Article
Full Text:: evenness (such as the Shannon index) of- ten provide no information beyond that offered by richness alone

Modeling the incidence and severity of hemlock dwarf mistletoe in 110-year-old wind-disturbed forests in Southeast Alaska

Creator:: Trummer, L. M., Hennon, P. E., Hansen, E. M., and Muir, P. S.
Abstract:: A model was developed to predict the severity of dwarf mistletoe (Arceuthobium tsugense (Rosendahl) G.N. Jones) in western hemlock trees (Tsuga heterophylla (Raf.) Sarg.) that developed within forests of Southeast Alaska that experienced near-catastrophic windthrow in the late 1800s. The model suggests that the degree of dwarf mistletoe severity on...
Resource Type:: Article
Full Text:: information on disease distri- bution and development over time. A spread and intensification model of dwarf

Stumps fumigated with chloropicrin: effects on surrounding plants

Creator:: Luoma, Daniel L. and Thies, Walter G.
Abstract:: Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stumps, both healthy and infected by Phellinus weirii (Murr.)Gilbertson, were fumigated with chloropicrin at a clearcut site on Washington s Olympic Peninsula. Vegetation cover on plots adjacent to treated and untreated stumps was evaluated to determine fumigant effects on vascular plants and moss. Ninety-eight vascular...
Resource Type:: Article
Full Text:: , chloropicrin had little or no effect on other surrounding vegetation. The general lack of interaction effects

Structure and yield of two-aged stands on the Willamette National Forest, Oregon: implications for green tree retention

Creator:: Acker, Steven A., Zenner, E. K., and Emmingham, W. H.
Abstract:: Green tree retention, a practice based on ecosystem science, has been integrated into forest management as a working hypothesis, requiring research and monitoring to quantify its effects. We undertook a retrospective study of natural, two-aged forest stands on the Willamette National Forest to provide preliminary estimates of the effects of...
Resource Type:: Article
Full Text:: practices, it is critical to marshal as much information as possible now on the potential implications of

Influence of precommercial thinning on understory vegetation of young-growth Sitka spruce forests in southeastern Alaska

Creator:: Cole, Elizabeth C., Hanley, Thomas A., and Newton, Michael
Abstract:: The effects of precommercial thinning on the understory vegetative cover of 16- to 18-year-old spruce–hemlock (Picea sitchensis (Bong.) Carrière – Tsuga heterophylla (Raf.) Sarg.) stands were studied in seven replicate areas over seven growing seasons postthinning. Vegetative cover was analyzed at the class level, but species-specific effects were examined in...
Resource Type:: Article
Full Text:: - scribed by De Mars (20(X)), no replicated experiments of this kind have been conducted. The Farr study was

ScholarsArchive@OSU

Interrelationships among northern flying squirrels, truffles, and microhabitat structure in Sierra Nevada old-growth habitat

Stem form and compression wood formation in young Pinus radiata trees

Interaction of vegetation control and fertilization on conifer species across the Pacific Northwest

Predictive mapping of forest composition and structure with direct gradient analysis and nearest-neighbor imputation in coastal Oregon, U.S.A.

Leaf litter chemistry controls on decomposition of Pacific Northwest trees and woody shrubs

Diversity and productivity of hypogeous fungal sporocarps in a variably thinned Douglas-fir forest

Modeling the incidence and severity of hemlock dwarf mistletoe in 110-year-old wind-disturbed forests in Southeast Alaska

Stumps fumigated with chloropicrin: effects on surrounding plants

Structure and yield of two-aged stands on the Willamette National Forest, Oregon: implications for green tree retention

Influence of precommercial thinning on understory vegetation of young-growth Sitka spruce forests in southeastern Alaska

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