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Keyword: tree growth

LTSP Brochure

Documents and Media Posted on: May 16, 2019
Long-Term Soil Productivity (LTSP) brochure (496 K in PDF format) Document Type: Other Documents

Sampling bias overestimates climate change impacts on forest growth in the southwestern United States

Publications Posted on: February 20, 2019
Climate-tree growth relationships recorded in annual growth rings have recently been the basis for projecting climate change impacts on forests. However, most trees and sample sites represented in the International Tree-Ring Data Bank (ITRDB) were chosen to maximize climate signal and are characterized by marginal growing conditions not representative of the larger forest ecosystem.

Biochar amendments to forest soils: Effects on soil properties and tree growth

Documents and Media Posted on: December 20, 2018
Bioenergy production from forest biomass offers a unique solution to reduce wildfire hazard fuel while producing a useful source of renewable energy. However, biomass removals raise concerns about reducing soil carbon (C) and altering forest site productivity.Document Type: Other Documents

Effects of heavy equipment on physical properties of soils and on long-term productivity: A review of literature and current research

Documents and Media Posted on: October 26, 2018
Soil disturbance caused by heavy equipment used for harvesting or site preparation can have negative effects on soil properties and long-term forest site productivity. Soil compaction, churning, rutting, mixing, displacement, and removal are types of disturbance that can reduce tree root growth through their influence on soil physical, chemical, and biological properties.Document Type: Other Documents

Advancing dendrochronological studies of fire in the United States

Publications Posted on: April 12, 2018
Dendroecology is the science that dates tree rings to their exact calendar year of formation to study processes that influence forest ecology (e.g., Speer 2010 [1], Amoroso et al., 2017 [2]). Reconstruction of past fire regimes is a core application of dendroecology, linking fire history to population dynamics and climate effects on tree growth and survivorship.

Anisohydric water use behavior links growing season evaporative demand to ring-width increment in conifers from summer-dry environments

Publications Posted on: March 22, 2018
Conifers in the Pinaceae and Cupressaceae from dry environments have been shown to broadly differ in their stomatal sensitivity to soil drying that result in isohydric versus anisohydric water use behavior, respectively.

Prognosis model for stand development

Publications Posted on: May 12, 2016
Describes a set of computer programs for developing prognoses of the development of existing stand under alternative regimes of management. Calibration techniques, modeling procedures, and a procedure for including stochastic variation are described. Implementation of the system for lodgepole pine, including assessment of losses attributed to an infestation of mountain pine beetle, is described.

Disentangling forest change from forest inventory change: A case study from the U.S. Interior West

Science Spotlights Posted on: October 07, 2015
Trends in forest attributes are typically assessed using long-term forest inventories, but trends can only be assessed when inventory methods are compatible over time. This study demonstrated an appropriate method of comparing historical to current inventory data, showing that comparisons not accounting for changing inventory methods can produce misleading results about forest trends in western states.

Disentangling forest change from forest inventory change: A case study from the US Interior West

Publications Posted on: September 29, 2015
Long-term trends in forest attributes are typically assessed using strategic inventories such as the US Department of Agriculture (USDA) Forest Service’s Forest Inventory and Analysis (FIA) program. The implicit assumption of any trend analysis is that data are comparable over time.

Comparison of tree size structure and growth for partially harvested and even-aged hemlock-spruce stands in southeast Alaska

Publications Posted on: July 09, 2010
The effects of partial cutting on tree size structure and stand growth were evaluated in 52 plots in 13 stands in southeast Alaska that were partially harvested 53 to 96 years ago and compared with 50-year-old even-aged stands that developed after clearcutting. The net basal-area growth was greater in the partially cut plots than in the uncut plots, and basal-area growth generally increased with increasing cutting intensity.