Navigation Links
Fossilized pollen reveals climate history of northern Antarctica
Date:6/27/2011

o specializes in palynology (the study of fossilized pollen and spores) and led the palynological reconstruction. "We found that the fossil record was unambiguous; glacial expansion in the Antarctic Peninsula was a long, gradual process that was influenced by atmospheric, tectonic and oceanographic changes."

Warny, her students and colleague Rosemary Askin were able to ascertain the exact species of plants that existed on the peninsula over the past 36 million years after a painstaking, three-year examination of thousands of individual grains of pollen that were preserved in muddy sediments beneath the sea floor just off the coast.

"The pollen record in the sedimentary layers was beautiful, both in its richness and depth," Warny said. "It allowed us to construct a detailed picture of the rapid decline of the forests during the late Eocene -- about 35 million years ago -- and the widespread glaciation that took place in the middle Miocene -- about 13 million years ago."

Obtaining the sedimentary samples wasn't easy. The muddy treasure trove was locked away beneath almost 100 feet of dense sedimentary rock. It was also off the coast of the peninsula in shallow waters that are covered by ice most of the year and beset by icebergs the rest. Anderson, a veteran of more than 25 research expeditions to Antarctica, and colleagues spent more than a decade building a case for the funding to outfit an icebreaker with the right kind of drilling equipment to bore through the rock.

In 2002, the National Science Foundation (NSF) funded the project, which was dubbed SHALDRIL. Three years later, the NSF research vessel Nathaniel B. Palmer left on the first of two drilling cruises.

"It was the worst ice year that any of us could remember," Anderson said. "We'd spend most of a day lowering drill string to the ocean floor only to pull it back up to get out of the way of approaching icebergs."

The next year was little better, but
'/>"/>

Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Ancient DNA, not fossilized bones, shows late survival of Ice Age megafauna
2. Worlds largest snake discovered in fossilized rainforest
3. Pollen also appears outside flowering season
4. UF Pine lsland pollen study leads to revision of states ancient geography
5. Amount of dust, pollen matters for cloud precipitation, climate change
6. Gone with the wind: Far-flung pine pollen still potent miles from the tree
7. Algae and pollen grains provide evidence of remarkably warm period in Antarcticas history
8. Exeter study reveals US turtles movements
9. New research on community gardening reveals the roots of emotional and physical health
10. Landmark report reveals immense burden of osteoporotic fractures in Europe
11. Study reveals important aspects of signaling across cell membranes in plants
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fossilized pollen reveals climate history of northern Antarctica
(Date:7/31/2014)... supported by the National Science Foundation (NSF), counters ... accelerates atmospheric warming, indicating instead that certain Arctic ... into the atmosphere. , The study, published ... focuses on thermokarst lakes, which occur as permafrost ... melted fresh water, converting what was previously frozen ...
(Date:7/31/2014)... DARIEN, IL Researchers who studied 100 twin pairs have ... function normally on less than six hours of sleep per ... resistance to the effects of sleep deprivation. , Results show ... BHLHE41 gene had an average nightly sleep duration of ... than the non-carrier twin, who slept for about six hours ...
(Date:7/31/2014)... scientists from Spain, France, and the U.S. has ... the oldest definitive member of the tribe Omaliini ... discovery and description were made possible through the ... technique, which allows the detailed study of otherwise ... is described in the journal Annals of ...
Breaking Biology News(10 mins):Certain Arctic lakes store more greenhouse gases than they release 2Study of twins discovers gene mutation linked to short sleep duration 2
... New findings from epidemiology and observational studies show ... unique demographic characteristics suggest the problem may be worse ... Latino population age, we are going to see the ... said Amelie G. Ramirez, Dr.P.H., director of the Institute ...
... , This release is available in French . ... the mechanism behind sexual mate selection has been resolved. According to ... de Montral researchers have discovered a molecular switch that becomes activated ... knows that a potential mate is close-by and healthy enough to ...
... melts into place, snugly fitting to the brain,s surface. ... monitor and control seizures, and to transmit signals from the ... implants have the potential to maximize the contact between electrodes ... They could provide a platform for a range of devices ...
Cached Biology News:Cancer health disparities research highlighted at AACR 101st Annual Meeting 2010 2Cancer health disparities research highlighted at AACR 101st Annual Meeting 2010 3Cancer health disparities research highlighted at AACR 101st Annual Meeting 2010 4Cancer health disparities research highlighted at AACR 101st Annual Meeting 2010 5Cancer health disparities research highlighted at AACR 101st Annual Meeting 2010 6Cancer health disparities research highlighted at AACR 101st Annual Meeting 2010 7Study reveals a mechanism for mate selection 2A brain-recording device that melts into place 2A brain-recording device that melts into place 3
(Date:7/31/2014)... 31, 2014 Today BioSpace , the leading life sciences ... campaign spotlighting the life sciences community in Illinois , ... Kansas , Michigan , Minnesota ... Ohio and Wisconsin . ... of all job postings on BioSpace originating in this region in 2013. ...
(Date:7/31/2014)... people over 60 are not donor candidates for bone ... time, making the elderly prone to life-threatening infection and ... now has discovered a reason why. , "We have ... blood-forming cells to maintain blood production over time in ... could be restored for rejuvenation therapies," said Emmanuelle Passegu, ...
(Date:7/31/2014)... see through organs and even the entire body to ... cellular structures has been a long-time dream of biologists. ... 31st in the journal Cell has now ... making opaque organs, bodies, and human tissue biopsies transparent, ... protocols could pave the way for a better understanding ...
(Date:7/31/2014)... Indiana University Bloomington have described the self-assembly of ... with potential value for the field of organic ... cells. , Their paper, "Anion-Induced Dimerization of 5-fold ... Self-Assembled Crystals," has been published online by ... Society of Chemistry. It is the first collaboration ...
Breaking Biology Technology:Midwest Biotech Leaders Featured On BioSpace Map 2Key to aging immune system is discovered 2See-through organs and bodies will accelerate biomedical discoveries 2Chemists demonstrate 'bricks-and-mortar' assembly of new molecular structures 2Chemists demonstrate 'bricks-and-mortar' assembly of new molecular structures 3
... community organizations to ... proactively get the job done, NEWARK, N.J., Aug. ... non-profit organization to utilize its,Ogiene(TM) FE technology to bring 10,000 mobile ... those families so desperately in need,of biohazard-free housing., Dr. Andy ...
... Product Safety Commission (CPSC) to carry out its mandate with ... toy trains bodes poorly for its ability to oversee the ... a new report released by the Project on Emerging Nanotechnologies ... the CPSC are being used in the Olympic Games in ...
... Fla., Aug. 21 Bioheart, Inc.,(Nasdaq: BHRT ... and,biologics that help monitor, diagnose and treat heart ... $1 million unsecured,loan from Rogers Telecommunications Limited. This ... or Bioheart,s repayment of its loan from BlueCrest,Capital. ...
Cached Biology Technology:BioNeutral Signs Agreement With a Non-profit for Long-Term Removal of Formaldehyde to Save 10,000 Mobile Homes in Louisiana 2Consumer Product Safety Commission not ready for nanotech 2Consumer Product Safety Commission not ready for nanotech 3Bioheart, Inc. Announces Additional Funding Support 2Bioheart, Inc. Announces Additional Funding Support 3Bioheart, Inc. Announces Additional Funding Support 4
... Library Panels were designed for full-length gene ... PCRs to identify the desired cDNA clone. ... a 96-well "Master Plate," where each well ... identified the positive well(s) by gel electrophoresis ...
... The DSQ II (Dual-Stage Quadrupole) ... the world leader in analytical instrumentation, introduces ... the DSQ II. Based on the ... DSQ and PolarisQ GC/MS systems, the DSQ ...
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... Micro Kit provides a fast and simple ... of protein samples. The kit is based ... resin as an ion exchanger. Salts such ... poor affinities for Norgens resin and are ...
Biology Products: