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6篇 您的检索式:作者名="Ruth Sherman"
    题名 作者 年代 出处 被引量
1Spatial patterns of plant diversity and communities in Alpine ecosystems of the Hengduan Mountains, northwest Yunnan, China显示文摘Aims Conduct a quantitative,but rapid,regional-level assessment of the alpine flora across northwest Yunnan(NWY)to provide a broadbased understanding of local and regional patterns of the composition,diversity and health of alpine ecosystems across NWY.Methods A stratified random sampling design was employed to select sites across the different mountain ranges of NWY.Vegetation was sampled by stratifying each site by the three major alpine vegetation community types:meadow,dwarf shrub and scree.Two 50-m transects were randomly located within each community type at each sampling site with 101-m^(2) subplots systematically placed along each transect.Environmental variables were recorded at each transect.Multivariate analyses were used to classify the major plant community assemblages and link community patterns to environmental and habitat variables.Important Findings Forb species richness varied from 19 to 105 species per site(21 sites total)with an average of 59 species per site(60 m^(2) sampled per site).Most species were patchily distributed with narrow distributions and/or small population sizes;over half the species occurred at only one or two sites.Distinct species assemblages were identified in the meadow vegetation that was strongly aggregated by geographic location suggesting the presence of distinct phytogeographic zones of the meadow alpine flora.Elevation and geographic location were the dominant environmental gradients underlying the variations in species composition.Jaccard’s coefficient of similarity averaged only 10%among sites indicating there was little similarity in the alpine flora across the region.The alpine vegetation is highly heterogeneous across the complex landscape of the Hengduan Mountains of NWY.Conservation strategies need to take into account the large geographic differences in the flora to maximize protection of biodiversity.Ruth Sherman Renee Mullen Li Haomin Fang Zhendong Wang Yi 2008Journal of Plant Ecology2008,1,2:20
2Alpine Ecosystems of Northwest Yunnan,China:an Initial Assessment for Conservation显示文摘Implementing conservation actions on-the-ground is not a straightforward process,especially when faced with high scientific uncertainty due to limited available information. This is especially acute in regions of the world that harbor many unique species that have not been well studied,such as the alpine zone of the Hengduan Mountains of Northwest Yunnan (NWY),a global biodiversity hotspot and site of The Nature Conservancy’s Yunnan Great Rivers Project. We conducted a quantitative,but rapid regional-level assessment of the alpine flora across NWY to provide a broad-based understanding of local and regional patterns of the alpine flora,the first large-scale analysis of alpine biodiversity patterns in this region. Multivariate analyses were used to classify the major plant community types and link community patterns to habitat variables. Our analysis indicated that most species had small distributions and/or small population sizes. Strong patterns emerged with higher diversity in the more northern mountains,but beta diversity was high,averaging only 10% among sites. The ordinations indicated that elevation and geographic location were the dominant environ-mental gradients underlying the differences in the species composition among communities. The high beta diversity across the alpine of these mountains implies that conservation strategies ultimately will require the protection of large numbers of species over a large geographical area. However,prioritiza-tion should be given to areas where potential payoffs are greatest. Sites with high species richness also have a greater number of endemic species,and,by focusing efforts on these sites,conservation investments would be maximized by protecting the greatest number of unique species.Ruth Sherman Renee Mullen LI Haomin FANG Zhendong WANG Yi 2007Journal of Mountain Science2007,4,3:3
3Vitamin D Receptor-Mediated Stromal Reprogramming Suppresses Pancreatitis and Enhances Pancreatic Cancer Therapy显示文摘Mara H. Sherman Ruth T. Yu Dannielle D. Engle Ning Ding Annette R. Atkins Herve Tiriac Eric A. Collisson Frances Connor Terry Van Dyke Serguei Kozlov Philip Martin Tiffany W. Tseng David W. Dawson Timothy R. Donahue Atsushi Masamune Tooru Shimosegawa Mino 2014Cell2014,,:1
4Spatial Patterns of Biomass and Aboveground Net Primary Productivity in a Mangrove Ecosystem in the Dominican Republic显示文摘Ruth E. Sherman Timothy J. Fahey Pedro Martinez 2003Ecosystems2003,,4:1
5Consumer satisfaction with health-care services:the influence of involvement显示文摘Sherman E Elain M Ruth BS 1997Psychology and Marketing1997,14,5:1
6Environment and Consumer Purchase Behavior: Mediating Role of Consumer Emotions 显示文摘Elaine Sherman Anil Mathur and Ruth Belk Smith 1997Psyehology & Marketing1997,14,4:1
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