Navigation Links
After mastodons and mammoths, a transformed landscape
Date:11/19/2009

ies as black ash, elm and ironwood began to colonize a landscape dominated by coniferous trees such as spruce and larch. The resulting mix of boreal and temperate trees formed a plant community unlike any observed today.

"As soon as herbivores drop off the landscape, we see different plant communities," Gill explains, noting that mastodon herds and other large animals occupied a parkland like landscape, typified by large open spaces and patches of forest and swamp. "Our data suggest that these trees would have been abundant sooner if the herbivores hadn't been there to eat them."

While both the extinction of North America's ice age megafauna and the sweeping change to the landscape are well-documented phenomena, there was, until now, no detailed chronology of the events that remade the continent's biological communities beginning about 14.8 thousand years ago. Establishing that the disappearance of mammoths, giant beavers, ground sloths and other large animals preceded the massive change in plant communities, promises scientists critical new insight into the dynamics of extinction and its pervasive influence on a given landscape.


'/>"/>

Contact: John Williams
jww@geography.wisc.edu
608-265-5537
University of Wisconsin-Madison
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. CSHL study shows that some malignant tumors can be shut down after all
2. Researchers find ways to encourage spinal cord regeneration after injury
3. UCLA scientists make paralyzed rats walk again after spinal-cord injury
4. Mouse brain rewires its neural circuits to recuperate from damaged neural function after stroke
5. Water quality improves after lawn fertilizer ban, study shows
6. High-fat diet affects physical and memory abilities of rats after 9 days
7. K-State researchers say after-school programs should promote activity, healthy nutrition
8. After dinosaurs, mammals rise but their genomes get smaller
9. Silicon with afterburners: Process developed at Rice could be boon to electronics manufacturer
10. Single thawed embryo transfer after PGD does not affect pregnancy rates
11. Ovarian transplantation: First baby is born after a new technique
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... for Bone and Mineral Research awarded Michael F. Holick, ... with the 2014 Louis V. Avioli Award. Holick, a ... internationally known for revolutionizing the understanding of vitamin D ... award honors a member of the American Society for ... bone and mineral basic research. It is named for ...
(Date:7/11/2014)... the National Institute of Standards and Technology (NIST) ... more effectively, they often prove that necessity is ... case recently for M. Lorna De Leoz and ... specialization of glycomics. Glycomics is the study of ... are attached to proteins and lipids and influence ...
(Date:7/11/2014)... international team of researchers, including scientists from the Max ... a reported a major step in understanding photosynthesis, the ... maintains the oxygen in its atmosphere and which is ... earth. , The researchers report the first direct ... namely the step in which a specific protein complex, ...
Breaking Biology News(10 mins):BUSM's Michael F. Holick receives American Society for Bone and Mineral Research award 2A first direct glimpse of photosynthesis in action 2
... With fewer than a dozen flowering plants out of 300,000 ... need to tap unused plants to feed the world in ... in the Comment feature of the July 4 issue of ... and rising incomes around the world, researchers estimate that food ...
... of Toronto-based researchers may be one step closer to a ... research and therapy. Induced pluripotent stem cells (iPSCs) can ... flexibly develop into many different types of cells. However, producing ... generation are largely unknown. But researchers from the University ...
... A new study published today in the journal ... the Australian, Antarctic and Indian tectonic plates, demonstrating how ... Researchers from Royal Holloway University, The Australian National ... uncertainties on how the plates evolved and where they ...
Cached Biology News:To feed the future, we must mine the wealth of the world's seed banks today 2Toronto team ID proteins key in stem cell production 2
(Date:7/10/2014)... , July 10, 2014 /PRNewswire-iReach/ -- Tute ... interpretation, today announced an agreement with Lineagen, ... for Lineagen,s NextStep Dx PLUS.  Lineagen, ... and neurological disorders, currently offers FirstStep Dx ... testing service used by healthcare providers as ...
(Date:7/10/2014)... research may help in the fight against terrorism with ... quantities of explosives with the use of light and ... Sensors and Actuators B: Chemical , the researchers describe ... in concentrations as low as 6.3 ppm (parts per ... few minutes. , "Traditionally explosives detection has involved looking ...
(Date:7/10/2014)... Hall effect in bilayer graphene and shown that this ... electric field. , The fractional quantum Hall effect, ... are exposed to large magnetic fields, is a striking ... behave as a single system. However, while the basic ... of this collective behavior remain not well understood, in ...
(Date:7/10/2014)... study by researchers at the University of Illinois ... mechanisms governing the interplay of spin and heat ... of ultrafast spintronic devices for data storage and ... as well as spin-angular momentum. In a typical ... is no spin current," explained David Cahill, a ...
Breaking Biology Technology:Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Detecting trace amounts of explosives with light 2Columbia researchers observe tunable quantum behavior in bilayer graphene 2Columbia researchers observe tunable quantum behavior in bilayer graphene 3University of Illinois study advances limits for ultrafast nano-devices 2
... East/Africa and Canada -, COLLEGEVILLE, Pa., June ... WYE ), announced today the,appointment of Andreas ... effective immediately. In this new role, Mr. Krebs ... Pharmaceuticals, and Senior Vice,President, Wyeth., Mr. Krebs ...
... to take a more proactive approach ... assessment of drug safety information, HYDERABAD, India ... Services Ltd. (NYSE: SAY ), a leading ... that it has,formed an alliance with Sciformix Corporation, ...
... Md., June 26 Pinnacle Biologics, a private,full ... it has entered into a preferred stock purchase ... acquired certain,unspecified number of preferred stock shares of ... not disclosed., Pinnacle Biologics owns the marketing ...
Cached Biology Technology:Satyam Forms Partnership with Sciformix to Provide Comprehensive Drug Safety Management 2Satyam Forms Partnership with Sciformix to Provide Comprehensive Drug Safety Management 3Satyam Forms Partnership with Sciformix to Provide Comprehensive Drug Safety Management 4