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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 | Management of traumatic sternocla vicular joint inj uries显示文摘 | Groh GI Wirth MA | 2011 | J Am Acad Orthop Surg2011，19，1： | 1 |
| 3 | Treatment of glenohumeral arthritis with a hemiarthroplasty:a minimum fiveyear follow-up outcome study显示文摘 | Wirth MA Tapscott RS Southworth C | 2006 | J Bone Joint Surg (Am)2006，88，5： | 1 |
| 4 | Reconstruction of chronic and complete dislocations of the acromioclavicular joint 显示文摘 | Guy DK Wirth MA Griffin JL | 1998 | Clin Orthop1998，，347： | 1 |
| 5 | High sus- tained virologic response rates in children with chronic hepati- tis C receiving peginterferon alfa -2b plus ribavirin 显示文摘 | Wirth S Ribes -Koninckx C Calzado MA | 2010 | J Hepatol2010，52，4： | 1 |
| 6 | Acute and chronic traumatic injuries of the sternoclavicular joint显示文摘 | Wirth MA Rockwood CA | 1996 | J Am Acad Orthop Surg1996，4，： | 1 |
| 7 | Resection arthroplasty of the sternoclavicular joint 显示文摘 | Rockwood CA Jr Groh GI Wirth MA | 1997 | J Bone Joint Surg Am1997，79，5： | 1 |
| 8 | Epithelial-mesenchymal transition:NF-κB takes center stage显示文摘 | Huber MA Beug H Wirth T | 2004 | Cell Cycle2004，3，12： | 1 |
| 9 | Treatment of trau- matic posterior sternoclavicular disloeations显示文摘 | Groh GI Wirth MA Rockwood CA | 2011 | J Shoul- der Elbow Surg2011，20，1： | 1 |
| 10 | Resection arthyoplasty of the sternoclavicular jiont显示文摘 | Groh GI Wirth MA | 1997 | J bone and jiont surg1997，79，： | 1 |
| 11 | Estrogen Receptor Al- pha Binding to ERE is Required for Full Tlr7- and Tlr9-Induced In- flammation 显示文摘 | Cunnlngham MA Wirth JR Naga O | 2014 | SOJ Immunol2014，2，1： | 1 |
| 12 | Epithelial-mesenehymal transition: NF-kappaB takes center stage显示文摘 | Huber MA Beug H Wirth T | 2004 | Cell Cycle2004，3，12： | 1 |
| 13 | Epithelial-mesenchymal transition: NF-K B takes center stage显示文摘 | Huber MA Beug H Wirth T | 2004 | Cell Cycle2004，3，12： | 1 |
| 14 | Complications of total shoulder- replacement arthroplasty 显示文摘 | Wirth MA Rockwood CA Jr | 1996 | J Bone Joint Surg Am1996，78，4： | 1 |
| 15 | Resection arthroplasty of the sternoclavicular joint 显示文摘 | Rockwood CA Jr Groh Gl Wirth MA | 1997 | J Bone Joint Surg Am1997，79，： | 1 |
| 16 | Resection arthroplasty of the stemoclavicular jiont显示文摘 | Rockwood CA Jr Groh GI Wirth MA | 1997 | J Bone joint Surg Am1997，79，3： | 1 |
| 17 | Complica-tionsof melalllic suture anchors inshouldersurgery:a report of8cases显示文摘 | Kaar TK Schenck RC Wirth MA | 2001 | Arthroscopy2001，17，1： | 1 |
| 18 | Resection arthroplasty of the stemocalavicular joint显示文摘 | Rockwood CA Jr Groh GI Wirth MA | 1997 | J Bone Joint Surg Am1997，79，3： | 1 |
| 19 | Resection arthroplasty ofthe stemoelavicular joint显示文摘 | Rockwood CA Jr Gmh GI Wirth MA | 1997 | J Bone Joint Surg(Am)1997，79，： | 1 |
| 20 | High sustained virologic response rates in children with chronic hepatitis C receiving peginterferon alfa-2b plus ribavirin 显示文摘 | Wirth S Ribes-Koninckx C Calzado MA | 2010 | J Hepatol2010，52，4： | 1 |
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