Navigation Links
Dinosaur-era climate change study suggests reasons for turtle disappearance
Date:3/14/2013

The dry, barren prairie around Alberta's Drumheller area was once a lush and subtropical forest on the shores of a large inland sea, with loads of wetlands inhabited by dinosaurs, turtles, crocodiles and small mammals.

But that changed about 71-million-years ago, according to a new study by researchers Annie Quinney and Darla Zelenitsky in paleontology at the University of Calgary. The researchers' calculations show that drastic climate change occurred during a five-million-year period in Alberta's badlands. At this time, the wetlands dried up and the warm humid climate was interrupted by a sudden cool, drying spell.

The study of ancient climate change is important as it helps researchers understand the impact sudden heating and cooling may have had on plants and animals.

"This was a time of change in Alberta, the wetlands disappeared as the inland sea retreated and the climate cooled," says Quinney, a former master's student in the Department of Geoscience. She led the study recently published in the journal Palaeogeography, Palaeoclimatology, Palaeoecology, which was part of her master's degree in the Department of Geoscience.

Dramatic climate change was previously proposed to be responsible for the disappearance of turtles 71-million-years ago, because they were considered to be "climate-sensitive" animals. Results of this research, however, show that the disappearance of turtles came before the climate cooled and instead closely corresponds to habitat disturbances, which was the disappearance of wetlands.

"The big surprise is that some animals, for example turtles, appeared to be more sensitive to habitat disturbances than to climate changes. Therefore, even if climatic conditions are 'ideal,' turtles may disappear or may not recover unless habitats are just right," says Quinney.

Quinney and supervisors Zelenitsky, assistant professor in the Department of Geoscience, and Franois Therrien of the Royal Tyrrell Museum in Drumheller studied ancient soils preserved in the rocks in the Red Deer River valley near Drumheller that were deposited 72 to 67 million years ago and record information about the past climate and environments.

Researchers calculated precipitation and temperature levels over a five-million year interval and during that time, temperature and precipitation dropped over a few thousand years, and that cooler interval lasted for 500,000 years.

"By studying the structure and chemistry of ancient soils, we were able to estimate the ancient temperature and rainfall that prevailed when those soils formed millions of years ago," says Quinney, who is now completing a PhD at Monash University in Australia on a full scholarship.


'/>"/>

Contact: Leanne Yohemas
lmyohema@ucalgary.ca
403-220-7722
University of Calgary
Source:Eurekalert  

Related biology news :

1. Nevada climate, environmental data network to inform research, community
2. International conference to tackle climate-change threats to agriculture
3. Climate-smart strategies proposed for spectacular US-Canadian landscape
4. A game plan for climate change
5. March of the pathogens: Parasite metabolism can foretell disease ranges under climate change
6. Smart way for seafarers to track effects of climate change
7. Biologists lead international team to track Arctic response to climate change
8. Poll: Americans back climate change regulation, not taxes
9. Profiting from climate change
10. Antarctic ice core contains unrivaled detail of past climate
11. Blowing hot and cold: US belief in climate change shifts with weather
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Dinosaur-era climate change study suggests reasons for turtle disappearance
(Date:11/19/2016)... , Nov. 18, 2016 Securus Technologies, ... solutions for public safety, investigation, corrections and monitoring, announced ... smaller competitor, ICSolutions, to have an independent technology judge ... the most modern high tech/sophisticated telephone calling platform, and ... customers that they do most of what we do ...
(Date:11/15/2016)...  Synthetic Biologics, Inc. (NYSE MKT: SYN), a ... gut microbiome, today announced the pricing of an ... common stock and warrants to purchase 50,000,000 shares ... the public of $1.00 per share and accompanying ... offering, excluding the proceeds, if any from the ...
(Date:6/27/2016)... Research and Markets has announced the addition of the ... The report forecasts the biometrics ... a CAGR of 12.28% during the period 2016-2020. ... with inputs from industry experts. The report covers the market landscape ... includes a discussion of the key vendors operating in this market. ...
Breaking Biology News(10 mins):
(Date:11/30/2016)... ... November 30, 2016 , ... BEI Kimco, a brand of ... flexure design that ensures high alignment accuracy by preventing unwanted shaft rotation. The ... where extreme precision is required, such as in medical equipment, laboratory instrumentation, clean ...
(Date:11/30/2016)... , Nov. 30, 2016  The Allen ... Cell Collection: the first publicly available collection of ... cells that target key cellular structures with unprecedented ... Research, these powerful tools are a crucial first ... to better understand what makes human cells healthy ...
(Date:11/30/2016)... 2016 Part of 5m$ Investment in ... ... Aptuit, LLC today announced that it had successfully completed the ... compounds have increased the Screening Collection to over 400,000. The ... capabilities of the company. This expansion, complemented by new robotics ...
(Date:11/30/2016)... Research Triangle Park, North Carolina (PRWEB) , ... November 30, 2016 ... ... Chemistry (IUPAC) approved the names and symbols for four elements: nihonium (Nh), moscovium ... , Following a 5-month period of public review, the names earlier proposed by the ...
Breaking Biology Technology: