Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Hidden treasure of the Gobi: How khulans get water

09.03.2020

Khulan, a species of wild ass living in the Gobi Desert, travel over extremely long distances to find enough food and meet their water needs. This is the result of a study of GPS tracks, conducted by the Research Institute of Wildlife Ecology (FIWI, Conservation Medicine Unit) at Vetmeduni Vienna, recently published in Scientific Reports. According to the researchers, regional conservation strategies are urgently needed so the khulan can continue to find the hidden liquid treasure of the Gobi Desert in the future.

Most large herbivores in arid landscapes are especially vulnerable to disturbances of their habitat – one of these is the Asiatic wild ass or khulan (Equus hemionus). Until recently widespread and abundant throughout the arid landscapes of Central Asia and Mongolia, the number of khulan has declined dramatically in the 19th and 20th century.


Khulans at waterpoint

P. Kaczensky

Besides changes in land use and overhunting, the increasing difficulty in accessing water is believed to have played a major role in this development. Until now, however, there had been little data on how water availability is influencing movements.

Waterpoints constitute a key resource for khulan

To find out more about khulan water use, an international research team led by the Research Institute for Wildlife Ecology (FIWI) at the Department of Interdisciplinary Life Sciences at Vetmeduni Vienna examined the world’s largest remaining khulan population in Mongolia’s South Gobi Region.

By tagging the khulan with GPS collars in order to track the animals in the 100,000 km² study area, an area larger than Austria, the researchers were able to identify 367 waterpoints, 53 of which received intensive and repeated uses by many different kulan over multiple years and are thus considered to be of high importance for the entire khulan population.

However, the large number of less visited waterpoints are also important as they provide “stepping-stones” to switch between areas and allow for maximal movement flexibility.

The need to drink daily is an important driver of khulan movements

According to the researchers, khulan drink almost daily and normally require 12–15 litres of water per day and up to 24 litres on hot days. The low water content of their plant resources further increases the animals’ need to drink. In the Mongolian Gobi, khulan roam over thousands of square kilometres, a range among the largest reported for terrestrial mammals.

These large nomadic movements are a consequence of the low and unpredictable resource base with both the availability of pasture and water changing within and between years. To survive and thrive in such landscapes, movement flexibility is key but may be threatened by increasing human impact on the khulan’s habitat resulting in habitat fragmentation.

Like in many other of the world’s drylands, human exploitation of water for agriculture, industry, and domestic uses increasingly drives the availability of and access to water for wildlife. Khulan tend to use pastures within 7 km of water and areas beyond 15-20 km of water become functionally inaccessible.

“Hence, blocking access to water excludes khulan from the landscape and Identifying important waterpoints in arid landscapes like the Gobi Desert is therefore essential for wildlife-friendly land-use planning,” says John Payne.

Important data for a regional khulan conservation strategy

According to the researchers, the most important variable for the seasonally different use of the waterpoints is snow cover (or the lack thereof). In the deserts of Central Asia and Mongolia, a lack of snow, the low water content of the vegetation, and the freezing of small and stagnant water bodies can result in drought conditions during winter. In extreme cases, these factors can result in winter die-offs of local wildlife populations.

Khulan´s highly mobile lifestyle is a coping strategy during localized catastrophic weather events, but this requires habitats that allow large-scale movements – which in turn necessitates maintaining landscape connectivity.

Petra Kaczensky: “Our results provide important data that can help guide a regional khulan conservation strategy, allow predictions for other khulan populations, and illustrate the overall importance of waterpoints for dryland herbivores.”

###

Service:
The article “Hidden treasure of the Gobi: understanding how water limits range use of khulan in the Mongolian Gobi” by John Payne, Bayarbaatar Buuveibaatar, Diana Bowler, Kirk Olson, Chris Walzer, and Petra Kaczensky was published in Scientific Reports.
https://www.nature.com/articles/s41598-020-59969-2?proof=true19

About the University of Veterinary Medicine, Vienna:
The University of Veterinary Medicine, Vienna in Austria is one of the leading academic and research institutions in the field of Veterinary Sciences in Europe. About 1,300 employees and 2,300 students work on the campus in the north of Vienna which also houses five university clinics and various research sites. Outside of Vienna the university operates Teaching and Research Farms. The Vetmeduni Vienna plays in the global top league: in 2019, it occupies the excellent place 5 in the world-wide Shanghai University veterinary in the subject "Veterinary Science". http://www.vetmeduni.ac.at

Wissenschaftliche Ansprechpartner:

Petra Kaczensky
Norwegian Institute for Nature Research - NINA &
Research Institute of Wildlife Ecology
Vetmeduni Vienna
T +47 92232-560
petra.kaczensky@nina.no

Originalpublikation:

The article “Hidden treasure of the Gobi: understanding how water limits range use of khulan in the Mongolian Gobi” by John Payne, Bayarbaatar Buuveibaatar, Diana Bowler, Kirk Olson, Chris Walzer, and Petra Kaczensky was published in Scientific Reports.
https://www.nature.com/articles/s41598-020-59969-2?proof=true19

Weitere Informationen:

https://www.vetmeduni.ac.at/en/infoservice/press-releases/press-releases-2020/hi...

Nina Grötschl | idw - Informationsdienst Wissenschaft

Further reports about: Equus hemionus Gobi Khulans Veterinary Medicine Wildlife Ecology herbivores

More articles from Life Sciences:

nachricht Protein linked to cancer acts as a viscous glue in cell division
08.07.2020 | Rensselaer Polytechnic Institute

nachricht Enzymes as double agents: new mechanism discovered in protein modification
08.07.2020 | Westfälische Wilhelms-Universität Münster

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Excitation of robust materials

Kiel physics team observed extremely fast electronic changes in real time in a special material class

In physics, they are currently the subject of intensive research; in electronics, they could enable completely new functions. So-called topological materials...

Im Focus: Electrons in the fast lane

Solar cells based on perovskite compounds could soon make electricity generation from sunlight even more efficient and cheaper. The laboratory efficiency of these perovskite solar cells already exceeds that of the well-known silicon solar cells. An international team led by Stefan Weber from the Max Planck Institute for Polymer Research (MPI-P) in Mainz has found microscopic structures in perovskite crystals that can guide the charge transport in the solar cell. Clever alignment of these "electron highways" could make perovskite solar cells even more powerful.

Solar cells convert sunlight into electricity. During this process, the electrons of the material inside the cell absorb the energy of the light....

Im Focus: The lightest electromagnetic shielding material in the world

Empa researchers have succeeded in applying aerogels to microelectronics: Aerogels based on cellulose nanofibers can effectively shield electromagnetic radiation over a wide frequency range – and they are unrivalled in terms of weight.

Electric motors and electronic devices generate electromagnetic fields that sometimes have to be shielded in order not to affect neighboring electronic...

Im Focus: Gentle wall contact – the right scenario for a fusion power plant

Quasi-continuous power exhaust developed as a wall-friendly method on ASDEX Upgrade

A promising operating mode for the plasma of a future power plant has been developed at the ASDEX Upgrade fusion device at Max Planck Institute for Plasma...

Im Focus: ILA Goes Digital – Automation & Production Technology for Adaptable Aircraft Production

Live event – July 1, 2020 - 11:00 to 11:45 (CET)
"Automation in Aerospace Industry @ Fraunhofer IFAM"

The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM l Stade is presenting its forward-looking R&D portfolio for the first time at...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

International conference QuApps shows status quo of quantum technology

02.07.2020 | Event News

Dresden Nexus Conference 2020: Same Time, Virtual Format, Registration Opened

19.05.2020 | Event News

 
Latest News

Shock-dissipating fractal cubes could forge high-tech armor

08.07.2020 | Materials Sciences

Scientists use nanoparticle-delivered gene therapy to inhibit blinding eye disease in rodents

08.07.2020 | Health and Medicine

'Growing' active sites on quantum dots for robust H2 photogeneration

08.07.2020 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>