Vortragsreihe Ökologie und Umweltforschung SS 2016

Thursday 12:00-13:30 H6, Geo

If you would like to get an e-mail reminder, please join our mailinglist


PD Dr. Karsten Wesche
Dept. of Botany, Senckenberg Museum of Natural History Görlitz (Homepage)
Thursday, 23.06.2016 13:00-14:00 H6, GEO:

Climate controls override grazing effects under extreme conditions of Central Asia

Mongolia and China host some of the most extensive and environmentally diverse rangelands, including the world’s largest alpine environments on the Tibetan plateau, some of the most extreme deserts in northern China and the vast steppes of central and eastern Mongolia. Animal husbandry is the main land use type across the region, with sheep and goat being the dominant species, supplemented by e.g. yaks in Tibet, horses in northern Mongolia or camels in the Gobi region. Estimates of grazing degradation in the region vary hugely, rendering development of urgently needed management strategies difficult. Part of this uncertainty is rooted in the lack of standards for degradation assessments such as selection of suitable indicators, and also in failure to calibrate assessments for the local abiotic context. Most notably, interactions between climate and human land use still are poorly understood.

The talk presents results from own research in Mongolia, northern China and Tibet, combining standard fencing experiments with large-scale transect studies and literature reviews. Although degrees of herders’ mobility vary across the region, land use can still be seen as relatively homogeneous. In contrast, climatic conditions differ strongly as shown by the altitudinal range covered (<1000 - >4000 m asl.) and the range in mean annual precipitation values (<100 mm – 700 mm MAP). Results from the dry and / or high-altitude ends of these gradients clearly show that climate exerts the dominant controls on vegetation, soils and insect indicators. At the extreme sites, grazing impact thus is relatively limited. Grazing effects are more pronounced in more mesic conditions, but even here they are not universally negative. Degradation threat may, however, be high in transition zones, near large settlements and under conditions of sedentary livelihoods with reduced mobility and limited flexibility in response to environmental extremes. Although these results are well in line with established theory, they have not yet been fully appreciated in current discussions on land use policies in both China and Mongolia.

 

*** Invited by Jürgen Dengler, Plant Ecology



More information:Export as iCal: Export iCal
zurück zur Liste
Upcoming ...


BayCEER Colloquium:
Th. 2020-01-16
Ecosystem functional types and biome concepts
Ecological-Botanical Garden:
Su. 2020-01-05
Auf ins Neue! Winterspaziergang im ÖBG
Su. 2020-01-05
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
Su. 2020-01-19
Kastilien, Navarra und das Baskenland: Orchideen im Land Don Quijotes
Geographisches Kolloquium:
Tu. 2019-12-17
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
BayCEER Blog
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
16.04.2019
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 943.9 hPa
Lufttemperatur: 2.9 °C
Niederschlag: 7.8 mm/24h
Sonnenschein: 6 h/d
Wind (Höhe 17m): 12.9 km/h
Wind (Max.): 29.9 km/h
Windrichtung: SW

...more
This site makes use of cookies More information