Search Result
Data
These data provide an inventory of the mass of downed fine woody debris stored within various forest types. This data is used to determine total organic matter, carbon, and...
DB Code: TD030
Study date: January 01, 1992 to September 18, 2000
Data
We examined the effects of species, initial substrate quality, and site differences on woody root decomposition and its nitrogen dynamics in Sitka spruce (Picea sitchensis),...
DB Code: TD031
Study date: June 01, 1995 to June 01, 2006
Data
Decomposition of woody roots in Sitka spruce (Picea sitchensis (Bong.) Carrière), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), and ponderosa pine (Pinus ponderosa P. Laws....
DB Code: TD032
Study date: June 01, 1995 to June 01, 1997
Data
These data can be used to provide an inventory of the volume of coarse woody debris stored in forests.
DB Code: TD035
Study date: June 01, 1997 to September 30, 2005
Data
Site locations for the long-term decomposition experiment that was established at the HJ Andrews Experimental Forest in 1985. The duration of the study is anticipated to be 200...
DB Code: TD040
Study date: January 09, 1985 to June 20, 2005
Data
This database contains data on patterns of fall and breakage by riparian trees along streams in the Pacific Northwest. Data in these tables were collected from 2000-2002. Two...
DB Code: TD042
Study date: January 09, 2000 to June 21, 2002
Data
Seasonal and annual rates of litterfall have been sampled at 6 permanent plots picked to represent a range of habitats and elevations. To assess variation in litterfall and...
DB Code: TL001
Study date: June 01, 1977 to January 11, 1985
Data
To establish rates of ecosystem processes in a near pollutant free environment and measure yearly patterns of variability of these processes. The methodologies used in this study...
DB Code: TL003
Study date: June 19, 1984 to January 01, 1987
Data
The Detrital Input and Removal Treatment (DIRT) Project was established to assess how rates and sources of plant litter inputs influence accumulations or losses of organic matter...
DB Code: TN021
Study date: December 01, 1999 to April 15, 2011
Data
Past research at the H. J. Andrews Experimental Forest has often occurred at different study locations at different times making comparisons between sites difficult. The small...
DB Code: TN025
Study date: May 01, 2005 to September 30, 2006
Data
Old-growth and mature Douglas-fir forest were clearcut logged in 1975. Large slash was removed from the site rather than burned. Douglas-fir seedlings were planted in 1976 and...
DB Code: TP041
Study date: January 01, 1973 to July 14, 2016
Data
The Three Sisters Wilderness Area is a UNESCO Biosphere Reserve representing the northern half of the Sierra-Cascade Province. It encompasses nearly 100,000 ha of largely...
DB Code: TP064
Study date: July 01, 1981 to September 09, 2009
Data
This database contains a collection of regression equations to predict various biomass components for many plants of the Pacific Northwest based on common parameters such as...
DB Code: TP072
Study date: January 01, 1961 to January 01, 2000
Data
Watersheds 1 and 3 in the HJ Andrews Experimental Forest have a long history of hydrologic, geomorphic, and ecological study. Long-term successional studies in the two watersheds...
DB Code: TP073
Study date: January 01, 1962 to June 29, 2022
Data
To test hypotheses concerning feedback mechamisms (competition and mortality) which effect the dynamics of plant population development. Specifically, to test if manipulation of...
DB Code: TP088
Study date: August 15, 1981 to October 15, 1996
Data
The goal of the study was to measure tree, shrub, and herb biomass and other parameters for stands of different ages that were unbiased by site selection. These data provide a...
DB Code: TP091
Study date: January 01, 1981 to January 01, 1993
Data
The factors that contribute to plant species establishment and decline following disturbance determine the rates and patterns of successional change of a system. In this long-term...
DB Code: TP103
Study date: July 01, 1990 to July 03, 2024
Data
Forest management practices on public lands have changed significantly in the last decade in response to growing concerns that traditional approaches have led to widespread loss...
DB Code: TP104
Study date: July 01, 1994 to October 31, 1997
Data
The Demonstration of Ecosystem Management Options (DEMO) Study is a regional-scale experiment in variable-retention harvest, established at six sites in western Oregon and...
DB Code: TP108
Study date: June 15, 1994 to August 31, 2016
Data
The study consists of 5 data files derived from two sampling protocols. Systematically located strip plots were used to estimate chanterelle productivity and smaller circular...
DB Code: TP110
Study date: January 09, 1994 to January 01, 2010
Data
Watersheds 6 (WS06) and 7 (WS07) at the HJ Andrews are part of a three-watershed study initiated in the 1970’s to examine the response of hydrology and forest vegetation to...
DB Code: TP114
Study date: July 09, 1979 to September 02, 2021
Data
On the HJ Andrews Experimental Forest, OR, studies on paired small watersheds compared site productivity for locations with diverse environmental attributes. For study code TP115...
DB Code: TP115
Study date: June 01, 2003 to January 01, 2010
Data
Vegetation history classification for Watersheds 1, 2, and 3, Andrews Experimental Forest, 1959-1990
The objective of this study was to create GIS layers depicting vegetation cover over the history of the small experimental watersheds (WS 1, 2, and 3) based on aerial photography...
DB Code: TP119
Study date: January 10, 1997
Data
Tree cores were taken from trees in permanent plots within the H.J. Andrews Experimental Forest to estimate annual bole biomass increment. The purpose of measuring this was to...
DB Code: TP120
Study date: June 01, 2000 to September 30, 2004