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| 1 | Preparation of Spectrin 显示文摘 | Gratzer W B | 1982 | Methods in Enzymology1982，85，： | 2 |
| 2 | Species Richness, Diversity and Density of Understory Vegetation along Disturbance Gradients in the Himalayan Conifer Forest显示文摘We investigated whether species richness, diversity and density of understory herbaceous plants differed along logging(gap) and grazing(primarily by cattle) disturbance gradients, and sought to identify drivers of richness, diversity and density of understory vegetation of logged sites. A factorial experiment was conducted in the mixed conifer forest of Gidakom in Western Bhutan. Levels of the logging treatment included small(0.15 – 0.24 ha), medium(0.25 – 0.35 ha) and large(0.36 – 1.31 ha) gaps. The grazing treatment included grazed(primarily by cattle) and ungrazed(where herbivores were excluded by a fence) plots nested within each gap. Data were collected from 12 gaps(4 replicates at each level of logging) using the point intercept method. Shannon Weaver Diversity and Margalef's indices were used to estimate species diversity and describe species richness, respectively. Soil samples were analyzed for pH and nutrients. The interaction effect of logging and grazing was significant(p≤0.001) only on species diversity. Relative to ungrazed areas, species diversity was significantly higher(0.01≤p≤0.05) in medium grazed gaps. Under grazed conditions, soil P was negatively correlated with gap size and species diversity. While species diversity was positivelycorrelated(0.01≤p≤0.05) with soil N in grazed plots species richness was positively correlated(0.001≤p≤0.01) with soil N in ungrazed plots. Relative density of Yushania microphylla and Carex nubigena were higher under ungrazed conditions. Our study suggests that the combined effect of cattle grazing and logging results in higher species diversity of understory vegetation in medium and grazed gaps in mixed conifer forests of Bhutan,whereas increase or decrease in relative density of major species is determined primarily by the independent effects of grazing and logging. From management perspective, forest managers must refrain from creating large gaps to avoid loss of nutrients(mainly P and N), which may eventually affect tree regeneration. Managers intending to maintain understory vegetation diversity must consider the combined effects of grazing and logging, ensuring low to moderate grazing pressure. | Kesang WANGCHUK András DARABANT Prem Bahadur RAI Maria WURZINGER Werner ZOLLITSCH Georg GRATZER | 2014 | Journal of Mountain Science2014，11，5： | 2 |
| 3 | Paleoenvironmental implications from biomarker and stable isotope investigations on the Velenje lignite seam (Slovenia) 显示文摘 | Bechtel A Sachsenhofer R F Markic M Gratzer R | 2003 | Org Geochem2003，34，： | 1 |
| 4 | Effectiveness of three extraction techniques in the development of a deeellularized bone-anterior cruciate ligament- bone graft 显示文摘 | Woods T Gratzer PF | 2005 | Biomaterials2005，26，35： | 1 |
| 5 | Ground effects in STOL operation显示文摘 | Gratzer L B Mahal A S | 1971 | Journal of Aircraft1971，19，3： | 1 |
| 6 | Altered mechanical properties in aortic elastic tissue using glutaraldehyde/solvent solutions of various dielectric constant显示文摘 | Gratzer PF Lee JM | | 0，，04： | 1 |
| 7 | Oil Shale and Bulk Geochemical Parameters in the Songliao and Huadian Basins (China): A Grade Classification Aapproach 显示文摘 | Sun Pingchang Liu Zhaojun Reinhard Gratzer | 2013 | Oil Shale2013，30，3： | 1 |
| 8 | Effectiveness of three extraction techniques in the development of a decellularized bone-anterior cruciate ligament- bonegratt显示文摘 | Woods T Gratzer PF | 2005 | Biomaterials2005，26，35： | 1 |
| 9 | Regeneration of mixed conifer forests under group tree selection harvestm anagement in western Bhutan Himalayas显示文摘 | Moktan M R Gratzer G Richards W H | 2009 | Forest Ecology and Management2009，257，： | 1 |
| 10 | Circular dichroism of DNA 显示文摘 | Gratzer WB Hill LR Owen RJ | 1970 | Eur J Biochem1970，15，： | 1 |
| 11 | Standard ideals in lattices显示文摘 | Gratzer G Schmid T | 1961 | Acts Math1961，，： | 1 |
| 12 | Continuous subcutaneous insulin infusion versus multiple daily insulin injections in patients with diabetes mellitus: systematic review and meta-analysis显示文摘 | K. Jeitler K. Horvath A. Berghold T. W. Gratzer K. Neeser T. R. Pieber A. Siebenhofer | 2008 | Diabetologia2008，，6： | 1 |
| 13 | Altered mechanical properties in aortic elastic tissue using glutaraldehyde/solvent solution of various dielectric constants显示文摘 | Gratzer PF Lee JM | 1997 | J Biomed Mater Res1997，37，： | 1 |
| 14 | Effect of basic fibroblast growth factor on the cellular repopulation of decellularized anterior cruciate ligament al ografts显示文摘 | MacLean SB Gratzer PF | | 0，，03： | 1 |
| 15 | Regeneration of mixed conifer forests under group tree selection harvest man- agement in western Bhutan Himalayas 显示文摘 | Moktan M R Gratzer G Richaids W H | 2009 | Forest Ecology and Management2009，257，： | 1 |
| 16 | Homomorphisms of distributive lattices as restrictions of congruences Ⅱ planarity and automorphisms显示文摘 | Gratzer G Lakser H | 1994 | Can J Math1994，46，： | 1 |
| 17 | Seed production,seed dispersal and seedling establishment of two afromontane tree species in and around a church forest:implications for forest restoration显示文摘Background:Seed production,seed dispersal and seedling establishment are relevant life phases of plants.Understanding these processes and their patterns is essential to recognize vegetation dynamics and to apply it to forest restoration.Methods:For Olea europaea and Schefflera abyssinica,fecundity was estimated using randomized branch sampling.Seed dispersal and seedling establishment were monitored using spatially explicit seed traps and plots.Dispersal functions were calibrated applying inverse modeling.Results:O.europaea produced more seeds and had longer dispersal distances compared to S.abyssinica.Correlations between observed and predicted number of recruits were statistically significant.Seedlings of the two species showed different niche requirements.Conclusions:The studied species were recruitment-limited due to low dispersal activity or lack of suitable microsites.Restoration relying on natural regeneration should overcome these limitations by increasing disperser visitation and reducing biotic and abiotic stresses. | Abrham Abiyu Demel Teketay Gerhard Glatzel Georg Gratzer | 2016 | Forest Ecosystems2016，3，4： | 1 |
| 18 | Lattice theory - First concepts and distributive lattices显示文摘 | Gratzer G | 1971 | San Francisco:Freeman and Campany1971，，： | 1 |
| 19 | Structural and dynamic states of actin in the erythrocyte显示文摘 | Gratzer WB | 1983 | Cell Biol1983，96，3： | 1 |
| 20 | Ground effects in STOL operation显示文摘 | Gratzer L B Mahal A S | 1971 | Journal of Aircraft1971，19，3： | 1 |
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