USGS studies wildfire ecology in the western United States

ears," Knick says. "We're looking at centuries if we rely only on natural processes for recovery." Knick's work suggests that preserving intact shrublands through more active fire suppression may be the only way to halt the losses. Restoration practices based on prescribed burning, as have been successfully carried out in forest ecosystems, may not work well in invaded shrublands.

"In forests you can use prescribed burning to remove a lot of the fine fuels, with the expectation that they are going to take several years to grow back," Knick says. "In shrublands dominated by cheatgrass, the cheatgrass will be back next year. It's using a disturbance to try to eliminate a species that likes disturbance."

While interior shrubland ecosystems have only a limited tolerance for fire, a very different kind of fire dynamic exists in the chaparral shrublands of coastal California. Ecologists have long known that chaparral ecosystems burn extensively and often, and much of the dominant vegetation in these systems is highly adapted to a fire-prone environment. Many plants have seeds that require fire to germinate, or need the kind of disturbed habitat fires leave behind in order to grow.

Dr. Jon Keeley, a USGS research ecologist with the Western Ecological Research Center, has studied the physiological adaptations that link the life cycles of chaparral vegetation with the natural regime of frequent brushfires. Upon reproduction, many species drop seeds that remain dormant in the soil "seed bank" until fire creates favorable growth conditions. When the area burns, these seeds receive a number of cues that may cause them to germinate. While seed germination in some species is stimulated by heat, in many others the onset of plant growth requires chemical exposure to combustion products such as charred wood.

Recently Keeley and Dr. C. J. Fotheringham, of California State University, Los Angeles, published a study demonstrating that for many speci

Contact: Catherine Haecker
United States Geological Survey

Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Related biology news :

1. Rensselaer marks the opening of the center for biotechnology and interdisciplinary studies
2. UCSD undergraduates participate in collaborative studies abroad on cyberinfrastructure
3. Scientist honored for studies of genetic influence on chemotherapy, tumor development
4. $5 million grant funds partnership, studies of minority-based issues in reproductive health
5. Synthetic hormone used in contraceptives and HRT produces negative effects in monkey studies
6. $5.5 million awarded to tree-ring research and climate studies
7. Pancreatic cancer blood test & gene studies show promise
8. Two studies weigh in on low-carb diets
9. Animal studies show promise treating severe chronic pain
10. New studies show Curves Program raises metabolic rate in overweight and sedentary women
11. Florida Tech researchers win $912,700 grant for cell studies

Post Your Comments:

(Date:4/11/2017)... N.Y. , April 11, 2017 ... fingerprints, but researchers at the New York University ... College of Engineering have found that partial similarities ... security systems used in mobile phones and other ... thought. The vulnerability lies in the ...
(Date:4/5/2017)... KEY FINDINGS The global market for stem ... 25.76% during the forecast period of 2017-2025. The rise ... growth of the stem cell market. Download ... The global stem cell market is segmented on the ... cell market of the product is segmented into adult ...
(Date:3/30/2017)... YORK , March 30, 2017 Trends, ... type (physiological and behavioral), by technology (fingerprint, AFIS, iris ... voice recognition, and others), by end use industry (government ... and immigration, financial and banking, and others), and by ... Europe , Asia Pacific , ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... ... wash is a basic first aid supply for any work environment, but most personal eye ... first if a dangerous substance enters both eyes? It’s one less decision, and likely quicker ... eye piece. , “Whether its dirt and debris, or an acid or alkali, getting anything ...
(Date:10/11/2017)... ROTTERDAM, the Netherlands and LAGUNA HILLS, ... that The Institute of Cancer Research, London ... will use MMprofiler™ with SKY92, SkylineDx,s prognostic tool to risk-stratify ... high-risk trial known as MUK nine . The University ... this trial, which is partly funded by Myeloma UK, and ...
(Date:10/10/2017)... DIEGO, CALIF. (PRWEB) , ... October 10, 2017 , ... ... as part of its corporate rebranding initiative announced today. The bold new look ... its reach, as the company moves into a significant growth period. , It will ...
(Date:10/10/2017)... firm Parks Associates announced today that Tom Kerber , ... Meeting , October 11 in Scottsdale, Arizona . Kerber ... smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase Driver ... "The residential security market has experienced continued growth, and the introduction ...
Breaking Biology Technology:
Cached News: