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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 | Antibiofilm peptides against biofilms on titanium and hydroxyapatite surfaces显示文摘Biofilms are the main challenges in the treatment of common oral diseases such as caries,gingival and endodontic infection and periimplantitis.Oral plaque is the origin of microbes colonizing in the form of biofilms on hydroxyapatite(tooth)and titanium(dental implant)surfaces.In this study,hydroxyapatite(HA)and titanium(Ti)disks were introduced,and their surface morphology was both qualitatively and quantitatively analyzed by a scanning electron microscope(SEM)and atomic force microscope(AFM).The average roughness of Ti disks(77.6±18.3 nm)was less than that of HA(146.1±38.5 nm)(p<0.05).Oral multispecies biofilms which were cultured on Ti and HA disks for 6 h and three weeks were visualized by SEM.We investigated the ability of two new antibiofilm peptides,DJK-5 and 1018,to induce killing of bacteria in oral multispecies biofilms on Ti and HA disks.A 6-h treatment by DJK-5 and 1018(2 or 10μg/mL)significantly reduced biomass of the multispecies biofilms on both Ti and HA disks.DJK-5 was able to kill more bacteria(40.4–75.9%)than 1018(30.4–67.0%)on both surfaces(p<0.05).DJK-5 also led to a more effective killing of microbes after a 3-min treatment of 3-day-old and 3-week-old biofilms on Ti and HA surfaces,compared to peptide 1018 and chlorhexidine(p<0.05).No significant difference was found in the amount of biofilm killing between Ti and HA surfaces.Both peptide DJK-5 and 1018 may potentially be used as effective antibiofilm agents in clinical dentistry. | Dan Wang Markus Haapasalo Yuan Gao Jingzhi Ma Ya Shen | 2018 | Bioactive Materials2018，3，4： | 5 |
| 3 | Helicobacter pylori infection:a risk factor for ischemic cerebrovascular disease and caratid atheroma 显示文摘 | Mendall MA | 1998 | J Neurol Neurosurg Psychiatry1998，64，： | 1 |
| 4 | Helicobacter pylori infection: a risk factor For is chaemic cerebrovascular disease and carotid atheroma 显示文摘 | Markus HS Mendall MA | 1998 | Neurol Neurosurg Psychiatry1998，64，1： | 1 |
| 5 | Resberatrol in prevention and treatment of common clinical condition of aging显示文摘 | Markus MA Morris BJ | 2008 | Clin Interv Aging2008，3，2： | 1 |
| 6 | Helicobacter pylori infection:a risk factor for ischaemic cerebrovascular disease and carotic atheroma显示文摘 | Markus HS Mendall MA | 1998 | J Neurol Neurosurg Psychiatry1998，64，1： | 1 |
| 7 | Helicobacter pylori:a risk factor for ischaemic cerebrovascular disease and carotic atheroma显示文摘 | Markus HS Mendll MA | 1998 | J Neurol Neurosury Psychiatry1998，64，1： | 1 |
| 8 | Helicobacter pylori infection: a risk factor for ischaemic cerebrovascular disease and carotid atheroma显示文摘 | Markus HS Mendall MA | 1998 | J Neurol Neurosurg Psychiatry1998，64，1： | 1 |
| 9 | Diagnostic strategies in CADASIL显示文摘 | Markus HS Martin RJ Simpson MA | 2002 | Neurology2002，59，： | 1 |
| 10 | Diagnostic strategies in CADASIL 显示文摘 | Marku HS Martin R J Simpson MA | 2002 | Neurology2002，59，8： | 1 |
| 11 | C - reactive protein and carotid intimal medial thickness in a community population显示文摘 | Sitzer M Markus HS Mendall MA | 2002 | J Cardiovasc Risk2002，9，2： | 1 |
| 12 | Budesonide versus Prednisone with Azathioprine for the Treatment of Autoimmune Hepatitis in Children and Adolescents显示文摘 | Marek Woynarowski Antal Nemeth Yaacov Baruch Sibylle Koletzko Michael Melter Burkhard Rodeck Christian P. Strassburg Markus Pr?ls Ma?gorzata Wo?niak Michael P. Manns | 2013 | The Journal of Pediatrics2013，，5： | 1 |
| 13 | Helicobacter pylori : a risk factor for ischemic cerebrovascular disease and carotid atheroma显示文摘 | Markus HS Mendall MA | 1998 | J Neurol Neurosilrg Psychiatry1998，64，1： | 1 |
| 14 | Diagnostic strategies in CADASIL显示文摘 | Markus HS Martin RJ Simpson MA | 2002 | Neurology2002，59，8： | 1 |
| 15 | Helicobacter pylori infection: a risk factor for ischaemic cerebrovascular disease and ca- rotid atheroma 显示文摘 | Markus HS Mendall MA | 1998 | J Neurol Neurosurg Psychiatry1998，64，1： | 1 |
| 16 | Diagnostic strategies in CADASIL显示文摘 | Markus HS Martin RJ Simpson MA | 2002 | Neurology2002，59，8： | 1 |
| 17 | Diagnostic strategies in CADASIL 显示文摘 | Markus HS Martin R J Simpson MA | 2002 | Neurology2002，59，8： | 1 |
| 18 | Helicobacter pylori infection:A risk factor for ischemic cerebrovascular disease and carotid atheroma显示文摘 | Markus HS Mendall MA | 1998 | J Neurosurg Paychiatry1998，64，1： | 1 |
| 19 | Diagnostic strategies in CADASIL显示文摘 | Markus HS Martin RJ Simpson MA | 2002 | Neurology2002，59，： | 1 |
| 20 | Helicobacter pylori infection:a risk factor for ischaemic cerebrOvascular disease and carotid atheroma显示文摘 | Markus HS Mendall MA | 1998 | J Neurol Neurosurg Psychiatry1998，64，： | 1 |
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