Navigation Links
Giant sequoias yield longest fire history from tree rings
Date:3/18/2010

ee was probably in a fire about every 10 to 15 years.

The team also compared charcoal deposits in boggy meadows within the groves to the tree-ring fire history. The chronology of charcoal deposits closely matches the tree-ring chronology of fire scars.

The health of the giant sequoia forests seems to require those frequent, low-intensity fires, Swetnam said. He added that as the climate warms, carefully reintroducing low-intensity fires at frequencies similar to those of the Medieval Warm Period may be crucial for the survival of those magnificent forests, such as those in Sequoia and Kings Canyon National Parks.

Since 1860, human activity has greatly reduced the extent of fires. He and his colleagues commend the National Park Service for its recent work reintroducing fire into the giant sequoia groves.

The team's report, "Multi-Millennial Fire History of the Giant Forest, Sequoia National Park, California, USA," was published in the electronic journal Fire Ecology in February. A complete list of authors and funding sources is at the bottom of this release.

To study tree rings, researchers generally take a pencil-sized core from a tree. The oldest rings are those closest to the center of the tree. However, ancient giant sequoias can have trunks that are 30 feet in diameter far too big to be sampled using even the longest coring tools, which are only three feet long.

To gather samples from the Giant Forest trees, the researchers were allowed to collect cross-sections of downed logs and standing dead trees, he said. It turned out to be a gargantuan undertaking that required many people and many field seasons.

"We were sampling with the largest chain saws we could find a chain-saw bar of seven feet," he said. "We were hauling these slabs of wood two meters on a side as far as two kilometers to the road. We were using wheeled litters the emergency rescue equipment for people and put a couple
'/>"/>

Contact: Mari N. Jensen
mnjensen@email.arizona.edu
520-626-9635
University of Arizona
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Giant panda can survive
2. Insects giant leap reconstructed by founder of sociobiology
3. Scientists discover new species of giant elephant-shrew
4. Scientists discover giant fossil frog from hell
5. Giant panda genome to be sequenced
6. A fossilized giant rhino bone questions the isolation of Anatolia, 25 million years ago
7. Tiny buckyballs squeeze hydrogen like giant Jupiter
8. Giant ocean eddy shadows Sydney
9. National Zoo giant panda pregnancy update
10. GIANT-Coli: A novel method to quicken discovery of gene function
11. Old growth giants limited by water-pulling ability
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Giant sequoias yield longest fire history from tree rings
(Date:3/10/2015)... , March 10, 2015  NXT-ID, Inc. (NASDAQ: ... the "Company"), a biometric authentication company focused on ... Wocket™ smart wallet has been named the "Number ... Modern. Rethink Modern ( http://www.rethinkmodern.com/ ) ... for your home and lifestyle that have a unique ...
(Date:3/3/2015)... Calif. , March 3, 2015 /PRNewswire/ ... leading provider of advanced cryogenic logistics solutions ... including immunotherapies, stem cells, cell lines, clinical ... reproductive medicine, today announced the expansion of ... Research Centers, ("Fred Hutch") Clinical Research ...
(Date:3/2/2015)...   Neurotechnology , a provider of high-precision biometric, ... Software Development Kit (SDK). The SentiGaze algorithm enables ... webcams to track eye movements and generate heatmaps based ... can be used for applications such as analysis of ... SDK can also be used to develop interfaces for ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 3NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 4Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 2Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 3Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 2Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 3
... --- How do the French get away with a clean ... fats? Scientists have long suspected that the answer to the ... of a new study bring them closer to understanding why. ... Public Library of Science (PLoS) ONE, researchers from industry and ...
... York next week to discuss new approaches to one ... weather. Five years ago, Professor Peter Bernath, of ... the Atmospheric Chemistry Experiment (ACE) satellite mission. To ... University at the King,s Manor in York will review ...
... release is available in German . ... cormorants in order to reconcile nature conservation and fishing ... work at the European level, researchers from the Helmholtz ... journal Environmental Conservation. Furthermore, they suggest a five-step action ...
Cached Biology News:Substance in red wine found to keep hearts young 2Substance in red wine found to keep hearts young 3York symposium puts focus on chemical 'weather' 2The cormorant -- the 'black plague' or an example of successful species conservation? 2The cormorant -- the 'black plague' or an example of successful species conservation? 3The cormorant -- the 'black plague' or an example of successful species conservation? 4The cormorant -- the 'black plague' or an example of successful species conservation? 5
(Date:3/26/2015)... 2015 Neogen Corporation (NASDAQ: NEOG ) ... quarter of fiscal 2015, which ended Feb. 28, increased ... $6,575,000. Earnings per share in the current quarter were ... net income increased 17% over prior year to $24,142,000, ... per share, for the same period a year ago. ...
(Date:3/26/2015)... 26, 2015 WriteResult, a premier provider ... from Yale University’s School of Public Health and New ... during a 4 month-long project. The goal of the ... income families with free access to fresh produce and ... health concerns like high blood pressure, diabetes and weight ...
(Date:3/25/2015)... 2015 The surging prevalence of ... fuelled social media growth, with over 50% of ... social networking. Insurance companies are making use of ... and promote a diversity of their services and ... exploiting social networking services as part of sales ...
(Date:3/25/2015)... (PRWEB) March 25, 2015 An increase ... ingredients in all forms of food nutrients, regulatory changes ... a substantial rise in demand for natural astaxanthin over ... started to ramp up their capacities to satisfy the ... natural and synthetic source astaxanthin (used in nutraceuticals, aqua ...
Breaking Biology Technology:Neogen reports 13% increase in net income 2Neogen reports 13% increase in net income 3Neogen reports 13% increase in net income 4Neogen reports 13% increase in net income 5Neogen reports 13% increase in net income 6Neogen reports 13% increase in net income 7Neogen reports 13% increase in net income 8Yale and New Haven Farms Improving Patient Health with WriteResult's myPROpad™ 2Yale and New Haven Farms Improving Patient Health with WriteResult's myPROpad™ 3Social Media Role in Global Insurance Industry Examined by Timetric in New Market Research Report Published at MarketPublishers.com 2Social Media Role in Global Insurance Industry Examined by Timetric in New Market Research Report Published at MarketPublishers.com 3Global Astaxanthin Market to Reach Value of USD 1.1 billion by 2020, Expects Industry Experts in New Report Available at MarketPublishers.com 2
... measures urinary 11dhTxB2 to assess aspirin effectDENVER, March ... CONX), a worldwide developer and marketer of diagnostic ... its AspirinWorks(R) Test March 29 - 31 at ... Scientific Session. The annual meeting will take place ...
... regulatory hiccups, the number of biosimilars in the ... patent expiry of key biopharmaceuticals has opened up ... of biosimilars. In addition, payers, perception of biosimilars, ... their safety, efficacy and affordability, will further bolster ...
... 18 , - ... and Compliance Challenges of Radiologic Technologists, Managers , ... Mosby,s Imaging Suite,( http://www.mosbysimagingsuite.com ), the first fully ... education, communication and,compliance challenges of radiologic technologists and ...
Cached Biology Technology:Corgenix to Exhibit AspirinWorks(R) Test at ACC.09 2Corgenix to Exhibit AspirinWorks(R) Test at ACC.09 3The Need for Safe and Affordable Biopharmaceuticals Drives the Development of the European Biosimilars Market, Says Frost & Sullivan 2The Need for Safe and Affordable Biopharmaceuticals Drives the Development of the European Biosimilars Market, Says Frost & Sullivan 3The Need for Safe and Affordable Biopharmaceuticals Drives the Development of the European Biosimilars Market, Says Frost & Sullivan 4New Online Imaging Suite Boosts Healthcare Imaging Efficiency, Productivity, and Revenues 2New Online Imaging Suite Boosts Healthcare Imaging Efficiency, Productivity, and Revenues 3New Online Imaging Suite Boosts Healthcare Imaging Efficiency, Productivity, and Revenues 4
Use as the souce of CETP enzyme for screening CETP inhibitors. Use in conjunction with the CETP activity assay kit (K601-100)....
...
... Cloning Kit includes the pZErO-1 vector with ... The pZErO-1 vector utilizes positive selection to ... the Zeocin resistance gene reduces the overall ... efficiencies. The kit contains all of the ...
22 x 50 mm; No. 1 thickness range: 0.13 to 0.17 mm, suitable for work in histology, cytology, urinalysis and microbiology, precleaned, store at room temperature ...
Biology Products: