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Keyword: forest inventory

Variable streamflow response to forest disturbance in the western United States

Science Spotlights Posted on: June 14, 2022
Forest disturbance is typically expected to lead to increased runoff, and therefore more water available for aquatic ecosystems and people. We examined streamflow and forest change in 159 watersheds in the western U.S. to test this expectation. Although some disturbed watersheds produced more runoff, very dry watersheds not only produced less runoff following disturbance but also were more likely to experience disturbance in the first place.

What’s been going on in Nevada’s Forests?

Science Spotlights Posted on: April 04, 2022
The report includes descriptive highlights and tables of area, numbers of trees, biomass, volume, growth, and mortality on forested lands. Also included are analyses on wildlife habitat and a case study that uses the Forest Vegetation Simulator tool to project possible future conditions of the Pinyon-juniper woodlands that dominate Nevada’s forested landscape. 

Nevada’s forest resources, 2009-2018

Publications Posted on: March 22, 2022
This report summarizes the most recent Forest Inventory and Analysis data of Nevada’s forests based on field data collected between 2009 and 2018. Many of the results were compared to those from the 2004-2013 evaluation period. Results show that Nevada’s forest land covers 10.6 million acres, most of which (63 percent or 6.7 million acres) are administered by the United States Department of the Interior Bureau of Land Management.

Ecological forecasting of tree growth: Regional fusion of tree-ring and forest inventory data to quantify drivers and characterize uncertainty

Publications Posted on: March 08, 2022
Robust ecological forecasting of tree growth under future climate conditions is critical to anticipate future forest carbon storage and flux. Here, we apply three ingredients of ecological forecasting that are key to improving forecast skill: data fusion, confronting model predictions with new data, and partitioning forecast uncertainty.

Climate-driven, but dynamic and complex? A reconciliation of competing hypotheses for species’ distributions

Publications Posted on: December 15, 2021
Estimates of the percentage of species "committed to extinction” by climate change range from 15% to 37%. The question is whether factors other than climate need to be included in models predicting species’ range change. We created demographic range models that include climate vs. climate-plus- competition, evaluating their influence on the geographic distribution of Pinus edulis, a pine endemic to the semiarid southwestern U.S.

A comprehensive forest biomass dataset for the USA allows customized validation of remotely sensed biomass estimates

Publications Posted on: October 01, 2021
There are several new and imminent space-based sensors intended to support mapping of forest structure and biomass. These instruments, along with advancing cloud-based mapping platforms, will soon contribute to a proliferation of biomass maps. One means of differentiating the quality of different maps and estimation strategies will be comparison of results against independent field-based estimates at various scales.

Influence of flight parameters on UAS-based monitoring of tree height, diameter, and density

Publications Posted on: September 25, 2021
Increased focus on restoring forest structural variation and spatial pattern in dry conifer forests has led to greater emphasis on forest monitoring strategies that can be summarized across scales.

Estimating stand height and tree density in Pinus taeda plantations using in-situ data, airborne LiDAR and k-nearest neighbor imputation

Publications Posted on: September 25, 2021
Accurate forest inventory is of great economic importance to optimize the entire supply chain management in pulp and paper companies. The aim of this study was to estimate stand dominate and mean heights (HD and HM) and tree density (TD) of Pinus taeda plantations located in South Brazil using in-situ measurements, airborne Light Detection and Ranging (LiDAR) data and the non- k-nearest neighbor (k- NN) imputation.

Status of five-needle white pine populations in the western U.S.

Science Spotlights Posted on: August 24, 2021
Forest monitoring data collected throughout the western U.S. allowed us to assess the sustainability of five-needle pine populations, which face growing threats from stressors such as drought, disease, and insects. The good news is that some five-needle white pine species appear to be regenerating and growing faster than trees are dying. The bad news is that two species – whitebark and limber pines – are dying faster than growth of new and surviving trees.

Comparative species assessments of five-needle pines throughout the western United States

Publications Posted on: July 27, 2021
Five-needle white pine species provide important ecosystem services throughout the western U.S., and many of these species have become susceptible to stressors including warmer temperatures, insect epidemics, nonnative disease, and altered disturbance regimes.