Navigation Links
Tortoise populations can withstand fires every 30 years
Date:7/19/2011

"increases the likelihood of a population becoming extinct", the authors explain.

However, when fires occur every 30 years (a frequency similar to the natural cycle in Mediterranean environments), medium-large populations of spur-thighed tortoises will not become extinct, according to models designed by the researchers. "Above this limit, the likelihood of extinction increases exponentially", the experts warn.

None of the youngest tortoises were able to survive the passage of fire in any kind of terrain, because of the type of shelter they choose below vegetation or in very shallow holes. They are also less able to withstand high temperatures, since their shells are not yet ossified.

Danger increases in spring

Although the fire reduced dozens of animals to ashes, the scientists found live individuals surviving in shelters they dig for themselves to sit out the periods of greatest temperature stress, in winter and summer.

The animals' behaviour changes in other seasons, however, and their activity levels increase. "In spring, the tortoises hide under bushes, meaning that, if a fire occurred at that time, they would all be wiped out", says Sanz-Aguilar.

The spur-thighed tortoise is found throughout Europe, Africa and Asia. In the European Union, the most numerous populations are found in the south east of Spain, between Murcia and Almeria, where they range over an area of 2,600 km2. "This is a typically Mediterranean species, and the natural landscapes of this zone suffer from certain kinds of fire, which recur infrequently", the researcher explains.

The International Union for the Conservation of Nature (IUCN) has classified this tortoise as 'vulnerable', and at risk of extinction over the medium term. In Spain, it is classified as 'endangered' on the Red Book of the Amphibians and Reptiles of Spain.


'/>"/>

Contact: SINC Team
info@agenciasinc.es
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Madagascars radiated tortoise threatened with extinction
2. New study shows how giant tortoises, alligators thrived in High Arctic 50 million years ago
3. In the race of life, better an adaptable tortoise than a fit hare
4. Giant tortoises show rewilding can work
5. Snakes, salamanders and other creatures thrive in areas with higher deer populations
6. Shifts in soil bacterial populations linked to wetland restoration success
7. Lake Michigan fish populations threatened by decline of tiny creature
8. You dont call, you dont write: Connectivity in marine fish populations
9. U of Minnesota-led study finds that hunters are depleting lion and cougar populations
10. Changing the course of nature: Are fisheries directing the evolution of fish populations?
11. Commercial fishing endangers dolphin populations
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tortoise populations can withstand fires every 30 years
(Date:7/9/2014)... injuries have identified an immune marker that predicts ... infection. The study, led by clinician-scientists at Nationwide ... the journal Shock , is part of ... clinical implementation of quick-turnaround immune function tests and ... following critical illness or injury in pediatric patients. ...
(Date:7/9/2014)... co-authored by a University of Guelph scientist that ... shows long-term exposure to a neonicotinoid pesticide hampers ... research by Nigel Raine, a professor in Guelph,s ... Imperial College London was published July 9 in ... . , The study shows how long-term pesticide ...
(Date:7/9/2014)... With over 100 diseases that can attack soybean crops, ... the most wanted list? University of Illinois scientists cite ... research is needed on the fungus that causes charcoal ... damp growing conditions but Macrophomina phaseolina , the ... drought conditions. , "As the climate continues to change ...
Breaking Biology News(10 mins):Immune function predicts infection risk among child trauma patients 2Immune function predicts infection risk among child trauma patients 3Bee foraging chronically impaired by pesticide exposure: Study 2Climate change provides good growing conditions for charcoal rot in soybeans 2Climate change provides good growing conditions for charcoal rot in soybeans 3
... Athens, Ga. University of Georgia researchers are working ... white sturgeon, is struggling in northern California,s Sacramento-San Joaquin ... fish populations and pollution. Doug Peterson and Robert ... and Natural Resources, have begun work on the one-year, ...
... lakes has a seriously detrimental impact on people and ... to a study published in the current issue of ... the physicochemical properties and toxicology of water from and ... Singare of Bhavan,s College, in Mumbai, and colleagues highlight ...
... of the ocean floor to deep within the human gut ... such an overwhelming majority of life on earth that no ... they maintain the living world around us. Microbes may be ... the most important. In a new two volume ...
Cached Biology News:UGA researchers study threats to white sturgeon 2UGA researchers study threats to white sturgeon 3Heavy metal -- in and around the lakes 2Handbook of Molecular Microbial Ecology: Exploring the World of the Microbes 2
(Date:1/15/2014)... 15, 2014 TaiGen Biotechnology Company, Limited ("TaiGen") today ... R-Pharm, a leading Russian pharmaceutical company, to develop and ... Russian Federation , Turkey ... is a novel antibiotic for the treatment of bacterial ...
(Date:1/14/2014)... 2014  3D Communications, a leading provider of strategic communications services to ... events in the United States and ... Cox , JD, is returning to the firm,s Washington, ... 3D after more than two years of service as Associate Commissioner ...
(Date:1/14/2014)... SAN DIEGO and BETHESDA, Md. ... they are joining together with two institutes from the ... more reliable tools for bringing safer, more effective treatments ... with the National Center for Advancing Translational Sciences (NCATS) ...
(Date:1/14/2014)... Rockville, MD (PRWEB) January 14, 2014 ... dedicated to developing innovative information technology solutions for ... other health care stakeholders, announced today the signing ... the US Food and Drug Administration (FDA). ...
Breaking Biology Technology:TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Former FDA Associate Commissioner Returns To 3D Communications 2Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3Global Record Systems Announces Research Collaboration Agreement with FDA to Create a Novel “Big Data” Paradigm for Collection of Patient Safety and Outcomes Information 2
... NEWARK, Del., Feb. 19 Lightwave Logic, Inc. (OTC ... technology company focused on the development of electro-optic polymer ... optical computing, announced today the addition of Anthony J. ... for 30 years in medicinal chemistry and brings a ...
... - finally accepts legitimate call by shareholders to general ... - will not allow shareholder ... - persists with high risk, high funding, Avexa merger proposal. ... Meeting scheduled for 27 March 2009 MELBOURNE, Australia, Feb. 19 ...
... solar cell materials that are as abundant but much ... today could substantially reduce the cost of solar photovoltaics, ... Resources Group and the Department of Chemistry at the ... Laboratory (LBNL). , These materials, some of which ...
Cached Biology Technology:Lightwave Logic, Inc. Announces the Addition of Anthony J. Cocuzza, PhD to its Technology Team 2Progen Concedes Shareholder Requisitioned Meeting 2Progen Concedes Shareholder Requisitioned Meeting 3Progen Concedes Shareholder Requisitioned Meeting 4Progen Concedes Shareholder Requisitioned Meeting 5Cheaper materials could be key to low-cost solar cells 2Cheaper materials could be key to low-cost solar cells 3
...
... This CLS number ... number, created to easily ... If showing no availability ... the old Sigma-Aldrich number ...
... Freedom EVO384R are fast multi-channel pipetting platforms ... different sizes, with a multi-channel head and ... time saving, with true parallel processing of ... your assays with the Freedom EVOware program. ...
... EVO96R and Freedom EVO384R are fast multi-channel ... in three different sizes, with a multi-channel ... deliver significant time saving, with true parallel ... setup of your assays with the Freedom ...
Biology Products: