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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 | Small-bowel MRI in children and young adults with Crohn disease: retrospective head-to-head comparison of contrast-enhanced and diffusion-weighted MRI显示文摘 | Henning Neubauer Thomas Pabst Anke Dick Wolfram Machann Laura Evangelista Clemens Wirth Herbert K?stler Dietbert Hahn Meinrad Beer | 2013 | Pediatric Radiology2013，，1： | 2 |
| 3 | Participation in normal immune response of a metastasis-inducing splice variant of CD44显示文摘 | Arch R Wirth K Hofmann M | 1992 | Sci1992，257，： | 1 |
| 4 | Eye gaze as relational evaluation:Averted eye gaze leads to feelings of ostracism and relational devaluation显示文摘 | Wirth J.H Sacco D.F Hugenberg K Williams K.D | | 0，，07： | 1 |
| 5 | Grinding in an air classifier mill ( I ) : Characterisation of the one-phase flow 显示文摘 | Toneva P Epple P Breuer M Peukert W Wirth K | 2011 | Powder Technology2011，211，1： | 1 |
| 6 | Key factors in Alzheim-erys disease: beta-amyloid precursor protein processing, metabo-lism and intraneuronal transport显示文摘 | Bayer TA Wirths 0 Majt6nyi K | 2001 | Brain Pathol2001，11，1： | 1 |
| 7 | Participation in normal immune responses of a metastasis-inducing splice variant of CD44显示文摘 | Arch R Wirth K Hoffmann M | 1992 | Science1992，257，： | 1 |
| 8 | Grinding in an air classifier mill ( 1 ) : Charaeterisation of the two-phase flow 显示文摘 | Toneva P Wirth K Peukert W | 2011 | Powder Technology2011，211，1： | 1 |
| 9 | Theta burst TMS increas- es cerebral blood flow in the primary motor cortex during motor performance as assessed by arterial spin labeling (ASL) 显示文摘 | Orosz A Jann K Wirth M | 2012 | Neuroimage2012，61，3： | 1 |
| 10 | Bicalutamide(Casodex)150 mg plus standard care in early non-metastatic prostate cancer:results from early prostate cancer trial 24 at a median 7 years' follow-up显示文摘 | WIRTH M TYRRELL C DELAERE K | 2007 | Prostate Cancer Prostatic Dis2007，10，： | 1 |
| 11 | Heat Transfer in Circulating PluidizedBeds 显示文摘 | Wirth K - E | 1995 | Chemical Engineering Science1995，50，： | 1 |
| 12 | Semantic memory involvement in the default mode network: a functional neuroimaging study using independent component analysis 显示文摘 | Wirth M Jann K Dierks T | 2011 | Neuroimage2011，54，4： | 1 |
| 13 | MD and KMC modeling of the growth and shrinkage mechanisms of helium-vacancy clusters in Fe显示文摘 | Morishita K Sugano R Wirth B D | 2003 | J Nucl Mater2003，323，23： | 1 |
| 14 | Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems显示文摘 | Schimel D S House J I Hibbard K A Bousquet P Ciais P Peylin P Braswell B H Apps M J Baker D Bondeau A Canadell J Churkina C: Cramer W Denning A S Field CB Friedlingstein P Goodale C Heimann M Houghton RA Melillo J M Moore B 3rd Murdiyarso D Noble L Pacala S W Prentice I C Raupach M R Rayner P J Scholes R J Steffen W L Wirth C | 2001 | Nature2001，414，： | 1 |
| 15 | Heat Transfer in Circulating Fluidized Beds显示文摘 | | 1995 | Chemical Engineering Science1995，50，： | 1 |
| 16 | Thermal stability of helium-vacancy clusters in iron显示文摘 | Morishita K Sugano R Wirth B D | 2003 | Nucl Instr and Meth B2003，202，： | 1 |
| 17 | Long-term outcome after radio- therapy alone for lymphocytepredominant I-Iodgkiu lymphoma: a retrospective muhicenter study of the Australasian Radiation On- cology Lymphoma Group 显示文摘 | Wirth A Yuen K Barton M | 2005 | Cancer2005，104，6： | 1 |
| 18 | Therapy of prostate abscess by employing pigtail drainage with transrectal ultrasound control显示文摘 | Loch T Weichert Jacobsen K | 1993 | Urologe A1993，32，6： | 1 |
| 19 | APP/PS1KI bigenic mice develop early synaptic deficits and hippocampus atrophy 显示文摘 | Breyhan H Wirths O Duan K | 2009 | Acta Neuropathol2009，117，： | 1 |
| 20 | Characterization of an annular fluidized bed显示文摘 | Collin A Wirth K E Stroeder M | 2009 | Powder Technol2009，190，12： | 1 |
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