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 40,000 online USDA Forest Service Research publications.

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What's new
a Prothonotary Warbler with a geolocator on its back.

Prothonotary Warbler populations have declined in recent years, prompting new research on the migratory behavior of this remarkable bird. View the story in our newsroom.

A wide landscape look at a forest impacted by drought and bark beetles.

In a new study published in Science, learn about the myriad of threats that could transform some of the world’s temperate forests. View the full news release.

A fire burning low to the ground. Smoke rises from the burned area on the right and unburned forest debris is on the ground on the left.

We provide scientific information to enable managers to work with fire to perform its ecological function while minimizing extreme events. Learn more about our fire science research.

A YouTube screenshot on how to detect a tree infected with Ohia wilt.

Our researchers are working with the University of Hawaii (UH) forestry extension to spread awareness on Rapid Ohia Death. See how you can identify trees with the disease by visiting the UH website.

Forest Service scientist Christina Liang poses for a photo with the backdrop of plants.

How did Institute of Pacific Islands Forestry scientist Christina Liang become interested in science and a career with the Forest Service? See her story on Faces of the Forest.

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 primary work occurs in California (the most populous state with the eighth-largest economy in the world) and Hawaii (a strategic location in the Pacific Rim economies and tourism).

Our mission is to develop and communicate science needed to sustain forest ecosystems and their benefits to society.

[image-text]: Featured Science
A small dam spans the width of the North Fork.
A nedun tree, Pericopsis mooniana, native to the island of Yap. One of many trees identified in Trees of Yap: A Field Guide.

October 2015: Apply knowledge globally

Temperate forest health in an era of emerging megadisturbance

In a recent study in the journal Science, Pacific Southwest Research Station lead author and forest ecologist Constance Millar published findings that longer, more severe, and hotter droughts and a myriad of other threats are stressing some of the world's temperate forests. Their findings suggest that without informed management, some forests could convert to shrublands or grasslands within the coming decades. The scientists encourage future studies identifying forests most vulnerable to the effects of mega-disturbances. In some cases, forest managers may be able to preserve ecosystem services like carbon storage as temperate forests transition to new ecological states.

Trees of Yap: A Field Guide

Yap has the lowest percentage of terrestrial native forest in the Federated States of Micronesia, with much of the original native forest converted to agroforest and a large proportion of the island covered by secondary vegetation. Growing threats to Yap’s trees have increased the urgency to learn more about the status of forest resources there. With no recent, comprehensive guides to the flora of Yap or of Micronesia as a whole, and information on Yap’s trees scattered and often out of date, Marjorie V. Cushing Falanruw has authored a field guide to assist with tree identification and classification on the Yap Islands.

[image-text]: Recent Publications
Cover image psw-gtr-247

Long, Jonathan W.; Quinn-Davidson, Lenya N.; Skinner, Carl N., eds. 2014. Science synthesis to support socioecological resilience in the Sierra Nevada and southern Cascade Range. Gen. Tech. Rep. PSW-GTR-247. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 723 p.

Cover image psw-gtr-241

Busse, Matt D.; Hubbert, Ken R.; Moghaddas, Emily E. Y. 2014. Fuel Reduction Practices and Their Effects on Soil Quality. Gen. Tech. Rep. PSW-GTR-241. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 156 p.

Cover image psw-rp-266

Hugh D. Safford and Kip M. Van de Water. 2014. Using Fire Return Interval Departure (FRID) Analysis to Map Spatial and Temporal Changes in Fire Frequency on National Forest Lands in California. Res. Pap. PSW-RP-266. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 59 p.

Last Modified: Oct 1, 2015 10:12:57 AM