USDA Forest Service

Pacific Southwest Research Station
Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.
[image:] TreeSearch, links to

Giving you access to more than 45,000 online USDA Forest Service Research publications.

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A colony of Townsend's big-eared bats together in a cave

A concerted effort by the scientific community has produced one of the largest and most complete datasets of recorded hibernacula in the western United States.

Image of smoke shrouding the Salmon River in August 2006.

Smoke generated by wildfires can cool river and stream water temperatures, according to a new study in California’s Klamath River Basin.

Cover photo from Research Paper 270.

Download our latest research paper, "Using species distribution models with climate change scenarios to aid ecological restoration decisionmaking for southern California shrublands."

A temperate rain forest in Washington state.

PNW and PSW have developed the draft Northwest Forest Plan science synthesis, to help provide a scientific foundation for Forest Service land management plans in the northwest.

A screenshot of the title slide to the YouTube video, The Ohia: The Story of Hawaii's Tree.

The Ohia: The Story of Hawaii's Tree is a video featuring PSW researchers explaining the Ohia tree and the impacts of Rapid Ohia Death.

Science that makes a difference.

The Pacific Southwest Research Station is a world leader in natural resources research through our scientific excellence and responsiveness to the needs of current and future generations.

We represent the research and development branch of the USDA Forest Service in the states of California and Hawaii and the U.S. affiliated Pacific Islands. Our mission is to develop and communicate science needed to sustain forest ecosystems and their benefits to society.

November Focus: Foster Resilient Ecosystems
Restoring forest heterogeneity with thinning and prescribed fire
Image of a publication titled, 'Creating more resilient forests through active management.'
Download "Creating More Resilient Forests Through Active Management" to get additional information on how to create resilient landscapes.

Many western U.S. forests have become much denser and more homogenous in the relative absence of wildfire. Thinning can be used to reduce density, but standard thinning approaches do not typically restore the diverse structure of historical forests, consisting of groups of trees intermixed with small gaps.

On the Stanislaus-Tuolumne Experimental Forest, PSW researchers compared the structure created using a new thinning approach – variable density thinning - with more evenly thinned (low variability) stands and an unthinned control, all with or without prescribed fire.

Our results show that high variability thinning coupled with prescribed burning resulted in a forest better aligned with the conditions present in historical frequent-fire forests, which were known to be more resilient to both wildfire and drought.

The research was published in the journal, Forest Ecology and Management, and is available via Treesearch.

[image-text]: Recent Publications
Cover image psw-gtr-257
Passive monitoring techniques for evaluating atmospheric ozone and nitrogen exposure and deposition to California ecosystems

In this report, several alternative approaches for estimating N deposition are also considered as a guide for selecting appropriate techniques in ecosystem-effects studies in California and elsewhere.

Cover image psw-gtr-258
Proceedings of the Coast Redwood Science Symposium—2016: past successes and future direction. Proceedings of a workshop

With its limited range and high value, the coast redwood forest is a microcosm of many of the emerging science and management issues facing today’s forested landscapes.

Cover image psw-gtr-259
OP-Yield Version 1.00 user’s guide

OP-Yield is a Microsoft Excel™ spreadsheet with 14 specified user inputs to derive custom yield estimates using the original Oliver and Powers (1978) functions as the foundation. It presents yields for ponderosa pine (Pinus ponderosa Lawson & C. Lawson) plantations in northern California.

Last Modified: Nov 5, 2018 10:59:29 AM