|Miehe, G; Schleuss, P-M; Seeber, E; Babel, W; Biermann, T; Braendle, M; Chen, F; Coners, H; Foken, T; Gerken, T; Graf, HF; Guggenberger, G; Holzapfel, M; Ingrisch, J; Kuzyakov, Y; Lai, Z; Lehnert, L; Leuschner, C; Li, X; Liu, J; Liu, S; Ma, Y; Miehe, S; Mosbrugger, V; Schmidt, J; Spielvogel, S; Unteregelsbacher, S; Wang, Y; Willinghöfer, S; Xu, X; Yang, Y; Zhang, S; Opgenoorth, L; Wesche, K: The Kobresia pygmaea ecosystem of the Tibetan highlands – Origin, functioning and degradation of the world's largest pastoral alpine ecosystem, Science of the Total Environment, 648, 754-771 (2019), doi:https://doi.org/10.1016/j.scitotenv.2018.08.164 [Link]|
With 450,000 km2 Kobresia (syn. Carex) pygmaea dominated pastures in the eastern Tibetan highlands are the world's largest pastoral alpine ecosystem forming a durable turf cover at 3000–6000ma.s.l. Kobresia's resilience and competitiveness is based on dwarf habit, predominantly below-ground allocation of photo assimilates, mixture of seed production and clonal growth, and high genetic diversity. Kobresia growth is co-limited by livestockmediated nutrient withdrawal and, in the drier parts of the plateau, low rainfall during the short and cold growing season. Overstocking has caused pasture degradation and soil deterioration over most parts of the Tibetan highlands and is the basis for this man-made ecosystem. Natural autocyclic processes of turf destruction and soil erosion are initiated through polygonal turf cover cracking, and accelerated by soil-dwelling endemic small mammals in the absence of predators. The major consequences of vegetation cover deterioration include the release of large amounts of C, earlier diurnal formation of clouds, and decreased surface temperatures. These effects decrease the recovery potential of Kobresia pastures and make them more vulnerable to anthropogenic pressure and climate change. Traditional migratory rangeland management was sustainable over millennia, and possibly still offers the best strategy to conserve and possibly increase C stocks in the Kobresia turf.
Iron, sulfur and a pinch of antimony - new perspectives on secondary mineral pathways and metalloid mobility
Auf ins Neue! Winterspaziergang im ÖBG
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
Intensify or diversify? How agriculture affects biodiversity and ecosystem processes in European farmland
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
EGU – interesting research and free coffee
Picky carnivorous plants?