Bai Y F, Wu J G, Xing Q, et al. 2008. Primary production and rain use efficiency across a precipitation gradient on the Mongolia plateau. Ecology, 89(8):2140-2153.
Chinese Academy of Sciences, Intergrative Expeditiaon Team to Qinghai-Tibet Plateau. 1988. The vegetation of Xizang (Tibet). Beijing:Science Press. (in Chinese)
Cincotta R P, P J Vansoest, J B Robertson, et al. 1991. Foraging ecology of livestock on the Tibetan Changtang :A comparison of three adjacent grazing areas. Arctic and Alpine Research, 23(2):149-161.
Courtois D R, B L Perryman, H S Hussein. 2004. Vegetation change after 65 years of grazing and grazing exclusion. Journal of Range Management,57(6):574-582.
Deleglise C, G Loucougaray, D Alard. 2011. Spatial patterns of species and plant traits in response to 20 years of grazing exclusion in subalpine grassland communities. Journal of Vegetation Science, 22(3):402-413.
Dingaan M, S Walker. 2011. Plant communities in semi-arid grassland in Bloemfontein, Free State:The influence of rainfall on species richness and biomass. South African Journal of Botany, 77(2):571-571.
Gao Q Z, Li Y, Wan Y F, et al. 2009a. Significant achievements in protection and restoration of alpine grassland ecosystem in Northern Tibet, China. Restoration Ecology, 17(3):320-323.
Gao Q Z, Li Y, Wan Y F, et al. 2009b. Dynamics of alpine grassland NPP and its response to climate change in Northern Tibet. Climatic Change,97(3-4):515-528.
Gao Q Z, Wan Y F, Li Y, et al. 2010a. Spatial and temporal pattern of alpine grassland condition and its response to human activities in Northern Tibet, China. Rangeland Journal, 32(2):165-173.
Gao Q Z, Wan Y F, Xu H M, et al. 2010b. Alpine grassland degradation index and its response to recent climate variability in Northern Tibet, China. Quaternary International, 226(1-2):143-150.
Harrison S and J B Grace. 2007. Biogeographic affinity helps explain productivity-richness relationships at regional and local scales. American Naturalist, 170:S5-S15.
He J S, Wang L, D F B Flynn, et al. 2008. Leaf nitrogen :phosphorus stoichiometry across Chinese grassland biomes. Oecologia, 155(2):301-310.
Holechek J L, D Galt, G Khumal. 2006. Grazing and grazing exclusion effects on New Mexico shortgrass prairie. Rangeland Ecology & Management, 59(6):655-659.
Hu Z M, Yu G R, Fan J W, et al. 2010. Precipitation-use efficiency along a 4500-km grassland transect. Global Ecology and Biogeography, 19(6):842-851.
Hutchinson M F. 1998a. Interpolation of rainfall data with thin plate smoothing splines. Part I:Two dimensional smoothing of data with short range correlation. Journal of Geographic Information and Decision Analysis, 2(2):139-151.
Hutchinson M F, 1998b. Interpolation of rainfall data with thin plate smoothing splines. Part II:Analysis of topographic dependence. Journal of Geographic Information and Decision Analysis, 2(2):152-167.
LenziGrillini C R, P Viskanic, M Mapesa. 1996. Effects of 20 years of grazing exclusion in an area of the Queen Elizabeth National Park, Uganda. African Journal of Ecology, 34(4):333-341.
Leonard S, J Kirkpatrick, J Marsden-Smedley. 2010. Variation in the effects of vertebrate grazing on fire potential between grassland structural types. Journal of Applied Ecology, 47(4):876-883.
Leps J, J Osbornovakosinova, M Rejmanek. 1982. Community stability, complexity and species life-history strategies. Vegetation, 50(1):53-63.
Li H X, Yan Y, Liu S Z. 2008. Study on remote sensing of grassland degeneration in the Xizang Plateau. Beijing:Science Press. (in Chinese)
Li S X, Wang Q J, Jing Z C, et al. 2009. Effects of protective enclosure on vegetation diversity, and productivity of degraded alpine Kobresia meadow (Qinghai-Tibetan Plateau). Polish Journal of Ecology, 57(3):495-502.
Li X J, Zhang X Z, Wu J S, et al. 2011. Root biomass distribution in alpine ecosystems of the northern Tibetan Plateau. Environmental Earth Sciences, 64(7):1911-1919.
Lunt I D, A Jansen, D L Binns, et al. 2007. Long-term effects of exclusion of grazing stock on degraded herbaceous plant communities in a riparian Eucalyptus camaldulensis forest in south-eastern Australia. Austral Ecology, 32(8):937-949.
Ma W H, He J S, Yang Y H, et al. 2010. Environmental factors covary with plant diversity-productivity relationships among Chinese grassland sites. Global Ecology and Biogeography, 19(2):233-243.
Macgillivray C W, J P Grime, S R Band, et al. 1995. Testing predictions of the resistance and resilience of vegetation subjected to extreme events. Functional Ecology, 9(4):640-649.
Mayer R, R Kaufmann, K Vorhauser, et al. 2009. Effects of grazing exclusion on species composition in high-altitude grasslands of the Central Alps. Basic and Applied Ecology, 10(5):447-455.
Oba G, O R Vetaas, N C Stenseth. 2001. Relationships between biomass and plant species richness in arid-zone grazing lands. Journal of Applied Ecology, 38(4):836-845.
Olff H and M E Ritchie. 1998. Effects of herbivores on grassland plant diversity. Trends in Ecology & Evolution, 13(7):261-265.
Osem Y, A Perevolotsky, J Kigel. 2004. Site productivity and plant size explain the response of annual species to grazing exclusion in a Mediterranean semi-arid rangeland. Journal of Ecology, 92(2):297-309.
Osem Y, A Perevolotsky, J Kigel. 2006. Size traits and site conditions determine changes in seed bank structure caused by grazing exclusion in semiarid annual plant communities. Ecography, 29(1):11-20.
Pärtel M, L Laanisto, M Zobel. 2007. Contrasting plant productivity-diversity relationships across latitude:The role of evolutionary history. Ecology, 88(5):1091-1097.
Pärtel M, M Zobel, K Zobel, et al. 1996. The species pool and its relation to species richness:Evidence from Estonian plant communities. Oikos,75(1):111-117.
Paruelo J M, W K Lauenroth, I C Burke, et al. 1999. Grassland precipitation-use efficiency varies across a resource gradient. Ecosystems,2(1):64-68.
Pfeiffer A and G Zangl. 2011. Regional climate simulations for the European Alpine Region-sensitivity of precipitation to large-scale flow conditions of driving input data. Theoretical and Applied Climatology, 105(3-4):325-340.
Qiao Y M, Wang Q J, Wang W Y. 2009. Yak (Bos Grunniens L. ) grazing effects on vegetation of alpine meadow with Potentilla Fruticosa L. (Rosaceae) Shrub in Qinghai-Tibet Plateau. Polish Journal of Ecology,57(4):769-777.
Schultz N L, J W Morgan, I D Lunt. 2011. Effects of grazing exclusion on plant species richness and phytomass accumulation vary across a regional productivity gradient. Journal of Vegetation Science, 22(1):130-142.
Shen M G, Tang Y H, Chen J, et al. 2011. Influences of temperature and precipitation before the growing season on spring phenology in grasslands of the central and eastern Qinghai-Tibetan Plateau. Agricultural and Forest Meteorology, 151(12):1711-1722.
Shi F S, Chen H, Wu Y, et al. 2010. Effects of livestock exclusion on vegetation and soil properties under two topographic habitats in an alpine meadow on the Eastern Qinghai-Tibetan Plateau. Polish Journal of Ecology, 58(1):125-133.
Suklitsch M, A Gobiet, A Leuprecht, et al. 2008. High resolution sensitivity studies with the regional climate model CCLM in the alpine region. Meteorologische Zeitschrift, 17(4):467-476.
Thumm U, O Ehrmann, F Wagner. 2005. Spatial variation of grazing effects in cooperatively used pastures in the pre-Alpine region of Southern Germany. Integrating Efficient Grassland Farming and Biodiversity, 10:356-359.
Tilman D. 1997. Distinguishing between the effects of species diversity and species composition. Oikos, 80(1):185-185.
Tilman D, J Knops, D Wedin, et al. 1997. The influence of functional diversity and composition on ecosystem processes. Science, 277(5330):1300-1302.
Wang G H, Li H, An M, et al. 2011. A regional-scale consideration of the effects of species richness on above-ground biomass in temperate natural grasslands of China. Journal of Vegetation Science, 22(3):414-424.
Wei X H, Yang P, Li S, et al. 2008. Effects of over grazing on plant species diversity of Alpine kobresia (Kobresia pygmaea) meadow in Tibet. Proceedings of the China Association for Science and Technology, 4(3):190-197.
Yang Y H, Fang J Y, P A Fay, et al. 2010. Rain use efficiency across a precipitation gradient on the Tibetan Plateau. Geophysical Research Letters, 37:L15702.
Yeo J J. 2005. Effects of grazing exclusion on rangeland vegetation and soils, East Central Idaho. Western North American Naturalist, 65(1) 91-102.
Zervas G. 1998. Quantifying and optimizing grazing regimes in Greek mountain systems. Journal of Applied Ecology, 35(6) 983-986.
Zhang W G, Huang W B, Yang Z Y. 2003. The study on the relationship between mini-patch and degradation of pasture. Acta Pratacultureas Sinica, 12(3):44-50. (in Chinese)
Zhao L P, Su J S, Wu G L, et al. 2011. Long-term effects of grazing exclusion on aboveground and belowground plant species diversity in a steppe of the Loess Plateau, China. Plant Ecology and Evolution, 144(3):313-320.
Zhong L, Ma Y M, M S Salama, et al. 2010. Assessment of vegetation dynamics and their response to variations in precipitation and temperature in the Tibetan Plateau. Climatic Change, 103(3-4):519-535.
Zhou H K, Tang Y H, Zhao X Q, et al. 2006. Long-term grazing alters species composition and biomass of a shrub meadow on the Qinghai-Tibet Plateau. Pakistan Journal of Botany, 38(4):1055-1069.
