Forests of the continental U.S. continue to fragment

A recent report by USDA Forest Service researcher Kurt Riitters shows that although U.S. forests are still connected over large regions, fragmentation is pervasive enough to potentially affect the ecological processes on most of these lands. In an article in the December issue of Ecosystems, Riitters and fellow researchers from the Environmental Protection Agency (EPA) used high-resolution land-cover maps derived from satellite images to model forest fragmentation across the continental U.S.

"Fragmentation refers to both the amount of forest and its spatial pattern," said Riitters, who is deputy project leader for the Southern Research Station (SRS) Forest Health Monitoring program in Research Triangle Park, NC. "Although the actual extent of forest has increased in some areas of the U.S., the spatial patterns indicate extensive fragmentation."

The study found that overall, 43.5 percent of U.S. forest was within 90 meters (295 feet) of forest edge, and almost 62 percent was within 150 meters (492 feet) of the edge. Less than 1 percent was more than 1230 meters (4036 feet) from the forest edge. Yet the study also found that where forest existed, it was dominant: 73 percent of all forest was in landscapes that were at least 60 percent forested. About half the fragmentation consisted of small (less than 7.29 ha) perforations in interior forest areas.

"Our findings show that forest fragmentation is pervasive and extensive, with three-fourths of all forest found in or near the edges of large, heavily fragmented regional forests," said Riitters. "Most of the large interior forests in the U.S. are publicly owned, or unsuitable for agriculture or urban development. Historic patterns of forest clearing have left relatively little interior forest along many of the major rivers, near urban areas, or in fertile agricultural areas."

Fragmentation affects habitat quality for the mammal, reptile, bird, and amphibian species found in forests. Some

Contact: Kurt Riitters
Southern Research Station - USDA Forest Service

Page: 1 2

Related biology news :

1. Nonnative Invasive Plants of Southern Forests
2. Arthropods of Tropical Forests
3. Drinking Water from Forests and Grasslands: A Synthesis of the Scientific Literature
4. National Laboratory, National Parks And Forests Leaders Seek To Share Resources
5. Understanding Earths Underwater Forests: Kelp Demography Off The Coast Of California
6. Invading Beetle Threatens Canadas Pine Forests
7. In Logged Forests, Hunting of Wildlife Becomes Deadly Second Harvest
8. Old Growth Forests May Shed Light On Worldwide Greenhouse Effect
9. Salamanders May Reveal Best Way To Manage Forests
10. Fragmentation Of Tropical Forests Can Create "Genetic Bottleneck," According To New University Of Georgia Study
11. Ameriflux Network Will Track CO2 Transfer In Forests

Post Your Comments:

(Date:3/4/2020)... ... March 04, 2020 , ... Vitamin ... release of a unique, multi-dimensional nutraceutical formula for ocular blue light protection. , ... plant biology to increase the retina’s healthy pigmentation and improve the eye’s management ...
(Date:3/3/2020)... ... March 03, 2020 , ... Board-certified oral and maxillofacial ... With over 16 years of training and experience, Dr. Noffze can successfully extract problem ... teeth as soon as possible is beneficial to the oral and overall health of ...
(Date:2/28/2020)... ... February 28, 2020 , ... Meridian Clinical Research , ... Industry Excellence (ViE) award for Best Clinical Trial Site. Meridian is also the ... Best Clinical Trial Network award. These nominations were the result of two voting rounds, ...
Breaking Biology News(10 mins):
(Date:2/19/2020)... ... February 18, 2020 , ... Intech , ... of a new and unified global brand identity, as it celebrates its 20th ... challenges, as well as an enthusiasm for designing and manufacturing state-of-the-art medical devices, ...
(Date:2/11/2020)... ... February 11, 2020 , ... ... to announce the successful results from a long-term follow-up clinical study of ... interspinous fixation device (INSPAN LLC). Unlike extension block design, the Inspan device ...
(Date:2/5/2020)... ... February 04, 2020 , ... Shoreline ... down to the strain level, has announced a new distribution partnership in Asia. ... and other products to companies and research organizations in China, Hong Kong, and ...
(Date:2/3/2020)... CAMBRIDGE, Mass. (PRWEB) , ... February 03, 2020 ... ... with US offices in Cambridge, MA, announce that OmniType, the 11-locus, single tube ... from today. OmniType is a best-in-class product featuring locus-multiplexing and short library preparation, ...
Breaking Biology Technology:
Cached News: