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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 | Short-Term Response of Soil Respiration to Addition of Chars:Impact of Fermentation Post-Processing and Mineral Nitrogen显示文摘The biodegradability of chars derived from pyrolysis and hydrothermal carbonisation(HTC) was studied in short-term dynamic incubation experiments under controlled conditions. Carbon dioxide C(CO2) emissions from soil-char mixtures in combination with solid digestate or mineral nitrogen(N) fertiliser were measured in dynamic chambers for 10 d. Compared to the original material(maize straw), pyrolysis and HTC chars showed significantly lower CO2 emissions and slower decay dynamics; and compared to the soil control, HTC char increased soil respiration to a significant extent, while pyrolysis char did not. The addition of mineral N resulted in a delayed respiration dynamics for HTC char, while the addition of digestate resulted in an increase in the respired CO2 for pyrolysis char and a decrease for HTC char. For the first time, a peculiar two-stage decay kinetics was observed for HTC char,indicating a highly inhomogeneous substrate consisting at least of two C pools. | Giacomo LANZA Stephan WIRTH Arthur GESSLER Jrgen KERN | 2015 | Pedosphere2015，25，5： | 2 |
| 3 | Superiority of molecular techniques for identification of gram-negative, oxidase-positive rods, including morphologically nontypical Pseudomonas aeruginosa, from patients with cystic fibrosis显示文摘 | Wellinghausen N Kothe J Wirths B | 2005 | J Clin Microbiol2005，43，8： | 1 |
| 4 | 1, 2, 3- Triazoles and 4, 5-Dihydro-^1H-tetrazol-5- ylidenes from Methyl 3, 3-Diazido-2-cyancacrylate with Amines显示文摘 | Saalfrank R W Wirth U Lurz C J | 1989 | J Org Chem1989，54，17： | 1 |
| 5 | Processing techniques for caviar and their effect on product composition显示文摘 | Gessner J Wirth M Kirschbaum F | 2002 | International Review of Hydrobiology2002，87，56： | 1 |
| 6 | Association of a dietary inflammatory index with inflammatory indices and metabolic syndrome among police officers 显示文摘 | Wirth M D Burch J Shivappa N | 2014 | J Occup Environ Med2014，56，9： | 1 |
| 7 | Dye-labelled substrates for the assay and detection of ehitinase and lysozyme activity 显示文摘 | WIRTH S J WOLF G A | 1990 | Journal of Microbiological Methods1990，12，34： | 1 |
| 8 | 3D surface and body documentation in forensic medicine: 3-D/CAD Photogrammetry merged with 3D radiological scanning 显示文摘 | Thali MJ Braun M Wirth J | 2003 | J Forensic Sci2003，48，6： | 1 |
| 9 | Can generic paediatfic mortality scores calculated 4 hours after admission be used as inclusion criteria for clinical trials? 显示文摘 | Leteurtre S Leclerc F Wirth J | 2004 | Crit Care2004，8，4： | 1 |
| 10 | The influence of nonanatom- ical insertion and incongruence of meniscal transplants on the artic- ular cartilage in an ovine model 显示文摘 | Van Lewinski G Kohn D Wirth C J etal | 2008 | Am J Sports Med2008，36，5： | 1 |
| 11 | Micro-plate colourimetric assay for Endo-acting cellulase,xylanase,chitinase, 1,3-β-glucmmse and amylase extracted from forest soil horizons 显示文摘 | WIRTH S J WOLF G A | 1992 | Soil Biology and Biochemistry1992，24，6： | 1 |
| 12 | The economic burden of major adult visual disorders in the United States显示文摘 | Rein DB Zhang P Wirth KE Lee PP Hoerger T J McCall N | 2005 | Arch Ophthalmol2005，124，12： | 1 |
| 13 | The alteration of metamict zircon and its role in the remobilization of high-field-strength elements in the Georgeville granite,Nova Scotia显示文摘 | Anderson A J Wirth R Thomas R | | 0，，： | 1 |
| 14 | Quantitative three - dimensional description of a rough surface and parameter evolution with shearing显示文摘 | GRASSELLI G WIRTH J EGGER P | 2002 | International Journal of Rock Mechanics & Mining Sciences2002，39，6： | 1 |
| 15 | Caviar composition in wild and cultured sturgeons-impact of food sources on fatty acid composition and contaminant load显示文摘 | Gessner J Wirth M Kirschbaum F | 2002 | Journal of Applied Ichthyology2002，18，46： | 1 |
| 16 | In vivo corrosion of four magnesium alloys and the associated bone response显示文摘 | WITTE F KAESE V HAFERKAMP H SWITZER E MEYER-LINDENBERG A WIRTH C J WINDHAGEN H | 2005 | Biomaterials2005，26，： | 1 |
| 17 | Effect of housefly maggot meal (magmeal) diets on the performance, concentration of plasma glucose, cortisol and blood characteristics of Oreochromis niloticus fingerlings 显示文摘 | Ogunji J O Kloas W Wirth M | 2008 | J Animal Physiol Anim Nutr2008，92，4： | 1 |
| 18 | Activated CD8+T lymphocytes induce differentiation of monocytes to dendritic cells and restore the stimulatory capacity of interleukin 10-treated antigen-presenting cells显示文摘 | Reichert J Grunebach F | 2002 | Cancer Res2002，62，17： | 1 |
| 19 | Adverse Effects of Low Level Heavy Metal Exposure on Male Reproductive Runction 显示文摘 | Wirth J J Mijal R S | 2010 | Syst Biol Reprod Med2010，56，2： | 1 |
| 20 | Rice endosperm iron biofortification by targeted and synergistic action of nicotianamine synthase and ferritin 显示文摘 | Wirth J Poletti S Aeschlimann B | 2009 | Plant Biotechnol J2009，7，： | 1 |
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