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| 1 | On the combined effect of soil fertility and topography on tree growth in subtropical forest ecosystems—a study from SE China显示文摘Aims The aim of our research was to understand small-scale effects of topography and soil fertility on tree growth in a forest biodiversity and ecosystem functioning(BEF)experiment in subtropical SE China.Methods Geomorphometric terrain analyses were carried out at a spatial resolution of 5×5 m.Soil samples of different depth increments and data on tree height were collected from a total of 566 plots(667 m2 each).The soils were analyzed for carbon(soil organic carbon[SOC]),nitrogen,acidity,cation exchange capacity(CEC),exchangeable cations and base saturation as soil fertility attributes.All plots were classified into geomorphological units.Analyses of variance and linear regressions were applied to all terrain,soil fertility and tree growth attributes.Important Findings In general,young and shallow soils and relatively small differences in stable soil properties suggest that soil erosion has truncated the soils to a large extent over the whole area of the experiment.This explains the concurrently increasing CEC and SOC stocks downslope,in hollows and in valleys.However,colluvial,carbon-rich sediments are missing widely due to the convexity of the footslopes caused by uplift and removal of eroded sediments by adjacent waterways.The results showed that soil fertility is mainly influenced by topography.Monte-Carlo flow accumulation(MCCA),curvature,slope and aspect significantly affected soil fertility.Furthermore,soil fertility was affected by the different geomorphological positions on the experimental sites with ridge and spur positions showing lower exchangeable base cation contents,especially potassium(K),due to leaching.This geomorphological effect of soil fertility is most pronounced in the topsoil and decreases when considering the subsoil down to 50 cm depth.Few soil fertility attributes affect tree height after 1-2 years of growth,among which C stocks proved to be most important while pH_(KCl)and CEC only played minor roles.Nevertheless,soil acidity and a high proportion of Al on the exchange complex affected tree height even after only 1-2 years growth.Hence,our study showed that forest nutrition is coupled to a recycling of litter nutrients,and does not only depend on subsequent supply of nutrients from the mineral soil.Besides soil fertility,topography affected tree height.We found that especially MCCA as indicator of water availability affected tree growth at small-scale,as well as aspect.Overall,our synthesis on the interrelation between fertility,topography and tree growth in a subtropical forest ecosystem in SE China showed that topographic heterogeneity lead to ecological gradients across geomorphological positions.In this respect,small-scale soil-plant interactions in a young forest can serve as a driver for the future development of vegetation and biodiversity control on soil fertility.In addition,it shows that terrain attributes should be accounted for in ecological research. | Thomas Scholten Philipp Goebes Peter Kühn Steffen Seitz Thorsten Assmann Jürgen Bauhus Helge Bruelheide Francois Buscot Alexandra Erfmeier Markus Fischer Werner Härdtle Jin-Sheng He Keping Ma Pascal A.Niklaus Michael Scherer-Lorenzen Bernhard Schmid Xuezheng Shi Zhengshan Song Goddert von Oheimb Christian Wirth Tesfaye Wubet Karsten Schmidt | 2017 | Journal of Plant Ecology2017，10，1： | 22 |
| 2 | Estimation of Throughfall Erosivity in a Highly Diverse Forest Ecosystem Using Sand-Filled Splash Cups显示文摘Sand-filled splash cups were used to study the erosive power of rainfall and throughfall in the humid subtropics of Southeast China. The splash cup measurements yielded precise and reproducible results under both open field conditions and forest vegetation. The splash cups were exposed to specific forest stands of different ages and to selected species (Schima superba, Castanopsis eyrei, Daphniphyllum oldhamii, Lithocarpus glaber) in the Gutianshan (古田山) National Nature Reserve (GNNR). The results of the measurements under forest vegetation show that the erosive power of throughfall drops to be 2.59 times higher compared to the open field. This accentuates the importance of shrub, herb and litter layers in forest ecosystems to protect the soil against erosion. Coalescing drops from leaves and branches (drips) are responsible for this notable gain in erosive power. Moreover, differences in sandloss between the investigated tree species (deciduous, evergreen) revealed that the erosion potential and the spatial heterogeneity of throughfall are species-specific. This highlights the importance of selecting specific species for afforestation projects considering the prevention of soil erosion. | Christian Geiβler Peter Kühn 史学正 Thomas Scholten | 2010 | Journal of Earth Science2010，21，6： | 2 |
| 3 | Homozygosity for the CARD15 frameshift mutation 1007fs is predictive of early onset of Crohn’s disease with ileal stenosis, entero-enteral fistulas, and frequent need for surgical intervention with high risk of re-stenosis显示文摘 | Julia Seiderer Fabian Schnitzler Stephan Brand Tanja Staudinger Simone Pfennig Karin Herrmann Katrin Hofbauer Julia Dambacher Cornelia Tillack Michael Sackmann Burkhard G?ke Peter Lohse Thomas Ochsenkühn | 2006 | Scandinavian Journal of Gastroenterology2006，，12： | 1 |
| 4 | Intelligent trainee behavior assessment system for medical training emplo- ying video analysis显示文摘 | Jungong H Peter HN Merien A | 2012 | Part Recog Lett2012，，33： | 1 |
| 5 | Diffusion-weighted magnetic resonance imaging for staging liver fibrosis is less reliable in the presence of fat and iron显示文摘 | Robin Bülow Birger Mensel Peter Meffert Diego Hernando Matthias Evert Jens-Peter Kühn | 2013 | European Radiology2013，，5： | 1 |
| 6 | Efficacy of Radiochemotherapy with Platin Derivatives Compared to Radiotherapy Alone in Organ-Sparing Treatment of Bladder Cancer显示文摘 | Rolf Sauer Stefan Birkenhake Reinhard Kühn Christian Wittekind Karl Michael Schrott Peter Martus | 1998 | International Journal of Radiation Oncology Biology Physics1998，，1： | 1 |
| 7 | Functional Correlation Approach to Operational Risk in Banking Organizations显示文摘 | Reimer Kühn Peter Neu | 2003 | Physical A2003，322，： | 1 |
| 8 | System delay and timing of intervention in acute myocardial infarction ( from the Danish Acute Myocardial Infarction - 2 Trial) 显示文摘 | Peter HN Christian JT Torsten TN | 2011 | Am J Cardiol2011，108，6： | 1 |
| 9 | Role of the intracellular receptor domain of gp130 (exon 17) in human inflammatory bowel disease显示文摘AIM: To study the role of the intracellular receptor domain of gp130 in human inflammatory bowel disease (IBD).METHODS: We amplified and sequenced the complete exon 17 of the human gp130 gene in 146 patients with IBD. According to clinical and histopathological signs,the 146 patients with IBD were classified as having Crohn's disease (n = 73) or ulcerative colitis (n = 63),or as indeterminate status (n = 10).RESULTS: No mutations in exon 17 of the gp130 gene could be detected in any of the 146 patients with IBD examined.CONCLUSION: There is no evidence that mutations in exon 17 of the gp130 gene are involved in the pathogenesis of human IBD. | Christoph J.Auernhammer Kathrin Zitzmann Fabian Schnitzler Julia Seiderer Peter Lohse George Vlotides Dieter Engelhardt Michael Sackmann Burkhard G(o|¨)ke Thomas Ochsenkühn | 2005 | World Journal of Gastroenterology2005，11，8： | 0 |
| 10 | Real-Time Scheduling Using GPUs--Advanced and More Accurate Proof of Feasibility显示文摘 | Peter Fodrek L'udovit Farkas Michal Blahol Martin Foltin Juraj Hn'it Tomas Murgas | 2012 | 通讯和计算机(中英文版)2012，9，8： | 0 |
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