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| 1 | Restoration Prospects for Heitutan Degraded Grassland in the Sanjiangyuan显示文摘In many ecosystems ungulates have coexisted with grasslands over long periods of time. However, high densities of grazing animals may change the floristic and structural characteristics of vegetation, reduce biodiversity, and increase soil erosion, potentially triggering abrupt and rapid changes in ecosystem condition. Alternate stable state theory provides a framework for understanding this type of dynamic. In the Sanjiangyuan atop the Qinghai-Tibetan plateau (QTP), grassland degradation has been accompanied by irruptions of native burrowing animals, which has accentuated the loss of ground cover. Severely degraded areas of alpine meadows are referred to as 'Heitutan'. Here, using the framework of alternate stable state theory, we describe the proximate and ultimate drivers of the formation of Heitutan on the QTP, and we assess prospects for recovery, in relation to the degree of biophysical alteration, of these alpine meadows. Effective rehabilitation measures must address the underlying causes of degradation rather than their symptoms. Heitutan degradation is not uni-causal. Rather it reflects different mechanisms operating at different spatio-temporal scales across this vast region. Underlying causes include overly aggressive exploitation of the grasslands (e.g. overgrazing), amplification of grazing and erosion damage by small mammals when outbreaks occur, and/or climate change. Given marked variability in environmental conditions and stressors, restorative efforts must vary across the region. Restoration efforts are likely toyield greatest success if moderately and severely degraded areas are targeted as the first priority in management programmes, before these areas are transformed into extreme Heitutan. | LI Xi-lai PERRY LW George BRIERLEY Gary GAO Jay ZHANG Jing YANG Yuan-wu | 2013 | Journal of Mountain Science2013，10，4： | 23 |
| 2 | Effect of PA-MSHA vaccine on plasma phospholipids metabolic profiling and the ratio of Th2/Thl cells within immune organ of mouse IgA nephropathy显示文摘 | Jia, LW Wang, C Kong, HW Yang, J Li, FL Lv, S Xu, GW | 2007 | 中国生物学文摘2007，21，11： | 19 |
| 3 | Chemical composition of gas from mantle xenoliths in alkali- basalt from Damaping, Hebei显示文摘WE have measured the chemical composition of the gas extracted from ortho- and clino-pyroxenes in spinel lherzolite xenolith, and from black pyroxenolite xenolith in Cenozoic alkah-basalt from Damáping, Wanquan County, Hebei Province, by pyrolystic method. | Liu, G Wang, XB Li, LW | 1997 | Chinese Science Bulletin1997，42，6： | 11 |
| 4 | Self-expandable metal stents and trans-stent light delivery: are metal stents and photodynamic therapy compatible? 显示文摘 | Wang LW Li LB Li ZS | 2008 | Lasers Surg Med2008，40，9： | 1 |
| 5 | Melanosis coli显示文摘 | Li D Browne LW Ladabaum U | 2009 | Clin Gastroen- terol Hepato12009，7，9： | 1 |
| 6 | Establishment of human prostate carcinoma skeletal metastasis models显示文摘 | Zhau HE Li CL Chung LW | 2000 | Cancer2000，88，12： | 1 |
| 7 | Social exchanges and subjective well-being among older Chinese: does age make a difference? 显示文摘 | Li LW Liang J | 2007 | PsycholAging2007，22，2： | 1 |
| 8 | Self-expandable metal stents andtrans-stent light delivery: are metal stents and photodynamic therapy compatible?显示文摘 | Wang LW Li LB Li ZS | 2008 | Lasers Surg Med2008，40，： | 1 |
| 9 | Transition-metal-based Lewis acid catalysis of aza-type Michael additions of amines to a,p-unsaturated electrophiles in water显示文摘 | Xu LW Li L Xia CG | 2004 | Helv Chim Acta2004，87，6： | 1 |
| 10 | Clinical comparison of the preview eye pressure monitor with the Gold- mann applanation tonometer and the Tonopen 显示文摘 | Li J Herndon LW Asrani SG Stinnett S Allingham RR | 2004 | Arch Oph- thalmol2004，122，8： | 1 |
| 11 | Rapid and sensitive analysis of tannins and monoterpene glycosides in Radix Paeoniae Alba products by HPLC-MS显示文摘 | Li B Qi LW Wen XD | 2009 | J Liq Chromatogr Related Technol2009，32，15： | 1 |
| 12 | Three new triterpenes from Nerium oleander and biological activity of the isolated compounds 显示文摘 | Fu LW Zhang S J Li N | 2005 | Journal of Natural Products2005，68，2： | 1 |
| 13 | Anthropometric Measurements and Periodontal Diseases in Children and Adolescents: A Systematic Review and Meta-Analysis显示文摘 | Li LW Wong HM Sun L | 2015 | Adv Nutr2015，6，6： | 1 |
| 14 | A simple method for clinical assay of su- peroxide dismutase显示文摘 | Sun Y Oberley LW Li Y | 1988 | Clin Chem1988，34，： | 1 |
| 15 | Establishment of human prostate carcinoma skeletal metastasis models显示文摘 | Zhau HE Li CL Chung LW | 2000 | Cancer2000，88，12： | 1 |
| 16 | Enhanced critical heat flux during quenching of extremely dilute aqueous colloidal suspensions with graphene oxide nanosheets显示文摘 | Zhang L YuZ T Li D Y Fan LW Zhu YZ Hong R H HuY C Fan J R Cen K F | 2013 | ASME Journal of Heat Transfer2013，135，05： | 1 |
| 17 | High frequency of PIK3R1 and PIK3R2 mutations in endometrial cancer elucidates a novel mechanism for regulation of PTEN protein stability显示文摘 | Cheung LW Hennessy BT Li J | 2011 | Cancer Discov2011，1，2： | 1 |
| 18 | Impurities identification in diamond single Crystal by electron microscopy 显示文摘 | Yin LW Zhou Z D Li M S | 2000 | Diamond Related Materials2000，9，： | 1 |
| 19 | Expression of esophageal cancer related gene 4 (ECRG4), a novel tumor suppressor gene,in esophageal canc- er and its inhibitory effect on the tumor growth in vitro and in vivo 显示文摘 | Li LW Yu XY Yang Y | 2009 | Int J Cancer2009，125，7： | 1 |
| 20 | The candidate tumor suppressor gene ECRG4 inhibits cancer ceils migration and invasion in esophageal car-cinoma显示文摘 | Li LW Zhang CP Li XY | 2010 | J Exp Clin Cancer Res2010，29，： | 1 |
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