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Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011
The benefits of combining modern science and traditional ecological knowledge can be seen through the research of PSW's Frank Lake. Visit the USDA Blog for the full story.
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.
Since 2010, an estimated 40 million trees have died in California. Visit the California Tree Mortality website to learn about the Forest Service's response and National Forest visitor safety.
Our researchers are working with the University of Hawaii and other partners to spread awareness on Rapid Ohia Death. Visit the Hawaii Forestry Extension website to learn about the disease.
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.
PSW scientists recently published a paper in the journal Ecosphere comparing understory vegetation after salvage logging treatments. Overall, the amount and composition of understory vegetation differed little compared to areas not logged.
Following the 2002 Cone Fire on the Lassen National Forest, units were logged at five different intensities, from complete removal to complete retention of all fire-killed trees. Researchers compared vegetation regrowth in two-year intervals starting four years post-fire.
Non-native weed populations didn't differ among treatments. Most native species, which tend to sprout from deeply buried plant parts, also displayed resilience to logging. Factors other than salvage logging appeared to drive differences observed in vegetation growth.
Information on urban tree growth underpins models used to calculate the effects of trees on the environment and human well-being. Maximum tree size and other growth data are used by urban forest managers, landscape architects, and planners to select trees most suitable to the amount of growing space, thereby reducing costly future conflicts between trees and infrastructure.
Foliage from loblolly (Pinus taeda L.), slash (P. elliottii Engelm.), and longleaf (P. palustris Mill.) pines was hand plucked to isolate the effects of level and timing of foliage removal on growth and mortality. Slash and loblolly pine received one of five defoliation treatments during one of four months: January, April, July, or October.
Water Temperature, Dissolved Oxygen, Flow, and Shade Measurements in the Three Stream Sections of the Golden Trout Wilderness
To determine the current range of water temperatures in the streams inhabited by California golden trout, Oncorhynchus mykiss aguabonita, water temperature recording probes were deployed and monitored from 2008 through 2013 in three meadows in the Golden Trout Wilderness.
|Last Modified: Dec 30, 2016 11:40:43 AM|