The study, which used aerial photography to inventory structures at the fringes of public forests, is the first to look at development trends in the two states before and after the enactment of land use laws.
This image shows change in development from 1976 to 2006, from "Changes in Development Near Public Forest Lands in Oregon and Washington, 1974-2005: Implications for Management," available online at http://www.treesearch.fs.fed.us/pubs/45205.
Credit: National Agriculture Imagery Program
The findings are reported in Changes in Development Near Public Forest Lands in Oregon and Washington, 1974-2005: Implications for Management, a report published by the PNW Station.
"Although public forests are not necessarily directly subject to development, they still face management issues at their edges because of indirect development pressure," said David Azuma, a research forester at the station who led the study.
In Oregon and Washington, about half of all forest lands are publicly owned and managed by the Forest Service, Bureau of Land Management, Oregon Department of Forestry, and Washington Department of Natural Resources. Using a fine-scale grid of points on air photos across the two states, Azuma and colleagues classified areas outside of federal lands for land use and then recorded the number of structures within a 321-meter radius of each of these points.
"Quantifying the increases in structures in areas that have not been converted in land use can serve as a surrogate for the broader risk associated with development near public lands," Azuma said.
Among the study's findings:
Structure density within 1 kilometer of public forest more than doubled for each of the public owner groups between the 1970s and the mid-2000s.
Washington Department of Natural Resources lands are the most developed along their edges, with an average of 11 structures per square kilometer within 1 kilometer of their land – a rate that is more than twice that of lands managed by the other public land owners.
In Oregon, the greatest amount of development occurred along the edges of Bureau of Land Management forests, where there is an average of 4.4 structures per square kilometer within 1 kilometer and 19.5 structures within 2 to 5 kilometers of their land.
The greatest increases in structure density along public forest borders occurred in Pierce, King, Snohomish, and Clark Counties in Washington, and in Deschutes County in Oregon.
The study's findings suggest that areas with increasing development should probably expect continued development. The work can help agencies that manage public forests to better plan for management options at the edges of their land.
The report is available online (at http://www.treesearch.fs.fed.us/pubs/45205) and in print by request. Printed copies of the report will be available after December 20 and can be requested by emailing firstname.lastname@example.org or by calling (503) 261-1211 and referencing "PNW-RP-596."
The Pacific Northwest Research Station—headquartered in Portland, Ore.—generates and communicates scientific knowledge that helps people make informed choices about natural resources and the environment. The station has 11 laboratories and centers located in Alaska, Washington, and Oregon and about 400 employees. Learn more online at http://www.fs.fed.us/pnw.
Yasmeen Sands | EurekAlert!
Some brain tumors may respond to immunotherapy, new study suggests
11.12.2018 | Columbia University Irving Medical Center
Climate change and air pollution damaging health and causing millions of premature deaths
30.11.2018 | International Institute for Applied Systems Analysis (IIASA)
The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.
Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
14.12.2018 | Power and Electrical Engineering
14.12.2018 | Physics and Astronomy
14.12.2018 | Physics and Astronomy