Multiple indicators yield diverging results on grazing degradation and climate controls across Tibetan pastures

	Multiple indicators yield diverging results on grazing degradation and climate controls across Tibetan pastures
	Wang, Yun 1,2; Lehnert, Lukas W.3; Holzapfel, Maika 1,3; Schultz, Roland 1; Heberling, Gwendolyn 4; Goerzen, Eugen 5; Meyer, Hanna 3; Seeber, Elke 6; Pinkert, Stefan 7; Ritz, Markus 1; Fu, Yao 8; Ansorge, Hermann 1; Bendix, Joerg 3; Seifert, Bernhard 1; Miehe, Georg 3; Long, Rui-Jun 9; Yang, Yong-Ping8 ; Wesche, Karsten 1,10,11
	2018-10-01
发表期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
卷号	93 页码:1199-1208
摘要	Understanding the impacts of livestock grazing is crucial to rangeland management and conservation. Numerous indicators have been employed to detect differences caused by grazing, while case studies suggest that effects differ among individual indicator systems. Across Tibetan pastures that have evolved with long grazing histories and harbour high levels of biodiversity, we tested: (I) whether commonly used grazing indicators differ in their sensitivity to grazing and environmental conditions, and (2) the relative importance of grazing and abiotic factors in controlling effects on indicators. Our sampling covered 18 sites within two main grassland types (steppe and meadow). We compared species compositions among communities of plants, small mammals and ants, as well as overall soil chemical conditions and field hyperspectral reflectance data using multivariate analyses between two qualitative levels of grazing intensity (heavy vs. light). Using univariate Generalized Linear Models, we explored the effects of grazing intensity, grassland type and their interaction on the richness and abundance of biotic groups as well as values of key soil and hyperspectral indices. The major environmental factors tested included temperature, precipitation, elevation, relief, exposure and inclination. Few of the indicators differed under relatively heavy grazing, including reductions in vegetation cover, soil organic carbon, total nitrogen concentration and two hyperspectral indices. Indicator groups differed both quantitatively and qualitatively with respect to grazing and climate impacts. Grazing effects were evident in the moist Kobresia meadows of eastern Tibet, while environmental controls dominated in alpine steppes of the drier western part of the plateau. Grazing effects on indicators thus depended on local precipitation conditions. Multivariate species compositions were affected by abiotic factors in all biotic indicator groups: precipitation was the most influential abiotic factor affecting plant species composition, overall soil nutrients and hyper spectral data, while elevation and temperature influenced ant and small mammal communities in terms of richness and species composition. Our results do not support the notion that local increases in relative grazing intensity have strong effects on the species richness of key biotic indicator groups across all Tibetan pastures. Reliable assessments of grazing effects thus require both multiple appropriate indicators and careful calibration to account for local climate and topographic conditions. Differences between principal grassland types must be acknowledged for future grassland conservation and management.
关键词	Ants Field spectrometry Vegetation Small mammals Soil nutrients Soil carbon Steppes Temperate rangeland
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/64310
专题	资源植物与生物技术所级重点实验室
通讯作者	Wang, Yun
作者单位	1.Senckenberg Museum Nat Hist Gorlitz, POB 300154, D-02806 Gorlitz, Germany 2.Martin Luther Univ Halle Wittenberg, Dept Geobot & Bot Garden, Kirchtor 1, D-06108 Halle, Saale, Germany 3.Philipps Univ Marburg, Fac Geog, Deutschhausstr 10, D-35032 Marburg, Germany 4.Gesell Freilandokol & Nat Chutzplanung MbH, Stuthagen 25, D-24113 Molfsee, Germany 5.Christian Albrechts Univ Kiel, Dept Landscape Ecol, Olshausenstr 75, D-24118 Kiel, Germany 6.Ernst Moritz Arndt Univ Greifswald, Dept Expt Plant Ecol, Inst Bot & Landscape Ecol, Soldmannstr 15, D-17489 Greifswald, Germany 7.Philipps Univ Marburg, Fac Biol, Karl von Frisch Str 8, D-35043 Marburg, Germany 8.Chinese Acad Sci, Kunming Inst Bot, Lanhei Rd 132, Kunming 650201, Yunnan, Peoples R China 9.Lanzhou Univ, Int Ctr Tibetan Plateau Ecosyst Management, 768 Jiayuguan West Rd, Lanzhou 730020, Gansu, Peoples R China 10.German Ctr Integrat Biodivers Res iDiv, Deutsch Pl 5e, D-04103 Leipzig, Germany 11.Tech Univ Dresden, Int Inst Zittau, Markt 23, D-02763 Zittau, Germany
推荐引用方式 GB/T 7714	Wang, Yun,Lehnert, Lukas W.,Holzapfel, Maika,et al. Multiple indicators yield diverging results on grazing degradation and climate controls across Tibetan pastures[J]. ECOLOGICAL INDICATORS,2018,93:1199-1208.
APA	Wang, Yun.,Lehnert, Lukas W..,Holzapfel, Maika.,Schultz, Roland.,Heberling, Gwendolyn.,...&Wesche, Karsten.(2018).Multiple indicators yield diverging results on grazing degradation and climate controls across Tibetan pastures.ECOLOGICAL INDICATORS,93,1199-1208.
MLA	Wang, Yun,et al."Multiple indicators yield diverging results on grazing degradation and climate controls across Tibetan pastures".ECOLOGICAL INDICATORS 93(2018):1199-1208.