Navigation Links
History of fire and drought shapes the ecology of California, past and future
Date:8/6/2014

blands of southern California, and similar sagebrush ecosystems in the Great Basin, are not adapted to the kind of frequent fire typical of the mountain conifer forests in California. Fires in the lower elevation ecosystems are always crown fires, which kill most of the vegetation. In the millennia before humans arrived, these ecosystems burned at intervals of 100 to 130 years.

These lower elevation ecosystems experienced unprecedented fire frequency in the last century, with fire returning to the same area every 10 to 20 years, altering the ecology of the landscape.

"In Southern California, lower elevation ecosystems have burned more frequently than ever before. I think it's partly climate, but also people starting fires during bad conditions," Keeley said. Bad conditions include extended droughts and dry fall days when the Santa Ana winds blow through the canyons.

In high elevation conifer forests, spring temperatures and drought are strongly correlated with fire, and Keeley thinks climate change and management choices are likely playing a role in current trends. But in the hotter, drier valleys and foothills cloaked in grass, oak, and chaparral, human behavior dominates. Through arson or accident, in southern California, over 95% of fires are started by people, according to Cal Fire.

"Climate change is certainly important on some landscapes. But at lower elevation, we should not be thinking just about climate change," said Keeley. "We should be thinking about all global change." Land use change and population growth create more opportunities for fires to start.

The high frequency of fire has instigated a persistent switch from chaparral to grass in some areas. Frequent fire favors quick germination and spread of forbs and grasses. Most grasslands in California are not native.

Since the more recent arrival of immigrants from Europe and Asia, several o
'/>"/>

Contact: Liza Lester
llester@esa.org
202-833-8773 x211
Ecological Society of America
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Scientists trace evolutionary history of what mammals eat
2. Family history of liver cancer increases risk of developing the disease
3. Earth history and evolution
4. New coelacanth find rewrites history of the ancient fish
5. Biology professor secures grant to save West Virginias primary natural history collection
6. Honoring the fundamental role of microbes in the natural history of our planet
7. New report puts real numbers behind history of oyster reefs
8. IU role in Human Microbiome Project exposes battle history between bacteria, viruses in human body
9. Short stretches of piRNA evaluate cells genetic history
10. Bringing natural history collections out of the dark
11. Geologys Mystery Interval, the Great Deepening, and the largest kill-off in Earth history
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM ... Clinical Practices (GCP) audit to confirm its adherence ... regulations. This accomplishment enables HITLAB to conduct regulated ... the highest principles for patient safety and research ... global healthcare access, quality, and delivery with innovative ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has ... in the APAC Region 2015-2019"  report to their ... in this market is advances in technology. With ... upgrade biometric solutions to the latest standard that ...
(Date:12/10/2014)... 2014  Valencell, a leader in performance biometric data ... demand from its licensees for highly accurate, clinically validated ... solely coming from fitness and health sectors, but first ... wearable is only as useful as the biometric data ... driver in long-term mass consumer adoption of wearable products," ...
Breaking Biology News(10 mins):HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2
... 20, 2010 TEL AVIV, Israel - European business ... leading platform for R&D-performing entrepreneurs and industries, will gather ... to take part in the first event in Israel ... Israel at the reigns of the EUREKA Network and ...
... and first use of a high-density SNP array for ... capable of revealing new insights into how the insect ... to findings published in the current edition of the ... the Anopheles gambiae genome can be used ...
... A child,s chances of developing allergies or wheezing is ... in the womb, according to scientists from the University of ... Research Council (MRC) and the British Lung Foundation, and undertaken ... in early pregnancy but falter later in pregnancy are likely ...
Cached Biology News:Israeli Minister of Industry and Trade to address European R&D leaders in Tel Aviv 2Genetic markers offer new clues about how malaria mosquitoes evade eradication 2Genetic markers offer new clues about how malaria mosquitoes evade eradication 3Allergies and wheezing illnesses in childhood may be determined in the womb 2
(Date:12/22/2014)...  ( www.competitivehealth.com ) — Competitive Health is pleased ... and advocacy service, has signed an agreement to become ... health services marketplace. 63% of Americans have ... expected to pay. As part of an ongoing effort ... is pleased to offer medical bill review and negotiation ...
(Date:12/22/2014)... Memphis, TENN (PRWEB) December 22, 2014 ... with Donor Egg Bank USA , a network ... the country. Through this partnership, patients have fast access ... for in vitro fertilization, IVF . Fertility Associates of ... to offer this fertility treatment option. , Dr. ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... CITY, Calif. , Dec. 19, 2014 Bina ... , USA) announced today that they have been acquired ... 1,2 is a privately held company that provides ... of next generation sequencing (NGS) data for the academic ... the Roche Sequencing Unit, and will continue to focus ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... Wis. - For the second time this year, a ... stock for sale to the public. Called an initial public ... to the companies and investors who are directly involved, but ... NimbleGen , a Madison-based biotechnology company, has filed papers with ...
... to experience high rates of failure. As a result, ... valued partner. The result stifles innovation, growth, and a ... requires shedding the flawed processes of yesterday, and introducing ... by promising incremental delivery of functional software. , , ...
... - Now that two companies he once owned ... strategy, Brian Wiegand's days as a self-described serial entrepreneur ... NameProtect , a developer of digital brand management ... of Wilmington, Del. , ,He will concentrate on ...
Cached Biology Technology:Wisconsin IPOs are a harbinger of growing tech economy 2Wisconsin IPOs are a harbinger of growing tech economy 3Agile Revolution: A new era of software delivery 2Agile Revolution: A new era of software delivery 3Agile Revolution: A new era of software delivery 4NameProtect sold, tech entrepreneur to focus on Jellyfish.com 2
Adjustable tilt angle 0 to 20 Adjustable speed of 3-25 RPM Load capacity: 2.7 kg (6 lbs.) Ambient temperature range 4C to 65C Low voltage power is supplied by wall mount transformer...
...
Request Info...
Request Info...
Biology Products: