|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 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 | Increased liver stiffness in alcoholic liver disease:Differentiating fibrosis from steatohepatitis显示文摘AIM:To test if inflammation also interferes with liver stiffness (LS) assessment in alcoholic liver disease (ALD) and to provide a clinical algorithm for reliable fibrosis assessment in ALD by FibroScan (FS).METHODS:We first performed sequential LS analysis before and after normalization of serum transaminases in a learning cohort of 50 patients with ALD admitted for alcohol detoxification. LS decreased in almost all patients within a mean observation interval of 5.3 d. Six patients (12%) would have been misdiagnosed with F3and F4 fibrosis but LS decreased below critical cut-off values of 8 and 12.5 kPa after normalization of trans-aminases. RESULTS:Of the serum transaminases,the decrease in LS correlated best with the decrease in glutamic oxaloacetic transaminase (GOT). No significant chang-es in LS were observed below GOT levels of 100 U/L. After establishing the association between LS and GOT levels,we applied the rule of GOT < 100 U/L for reliable LS assessment in a second validation cohort of 101 patients with histologically confi rmed ALD. By ex-cluding those patients with GOT > 100 U/L at the time of LS assessment from this cohort,the area under the receiver operating characteristic (AUROC) for cirrhosis detection by FS improved from 0.921 to 0.945 while specificity increased from 80% to 90% at a sensitivity of 96%. A similar AUROC could be obtained for lower F3 fibrosis stage if LS measurements were restricted to patients with GOT < 50 U/L. Histological grading of inflammation did not further improve the diagnostic accuracy of LS.CONCLUSION:Coexisting steatohepatitis markedly increases LS in patients with ALD independent of fibrosis stage. Postponing cirrhosis assessment by FS during alcohol withdrawal until GOT decreases to < 100 U/mL signif icantly improves the diagnostic accuracy. | Sebastian Mueller Gunda Millonig Lucie Sarovska Stefanie Friedrich Frank M Reimann Maria Pritsch Silke Eisele Felix Stickel Thomas Longerich Peter Schirmacher Helmut Karl Seitz | 2010 | World Journal of Gastroenterology2010，16，8： | 10 |
| 3 | Electrical impedance tomography system based on active electrodes显示文摘 | Pascal Olivier Gaggero Andy Adler Josef Brunner Peter Seitz | 2012 | Physiological Measurement2012，，5： | 1 |
| 4 | Redirection of anthocyanin synthe- sis in Osteospermum hybrida by a two-enzyme manipu- lationstrategy显示文摘 | CHRISTIAN SEITZ MATTHIAS VITTEN PETER STEINBACH | 2007 | Phytochemistry2007，68，6： | 1 |
| 5 | Structured treatment interruption in patients with alveolar echinococcosis显示文摘 | Stefan Reuter Andreas Buck Burkhard Manfras Wolfgang Kratzer Hanns Martin Seitz Kassa Darge Sven Norbert Reske Peter Kern | 2004 | Hepatology2004，，2： | 1 |
| 6 | Differential expression of glutamine synthetase and cytochrome P450 isoforms in human hepatoblastoma显示文摘 | Andreas Schmidt Albert Braeuning Peter Ruck Guido Seitz Sorin Armeanu-Ebinger Joerg Fuchs Steven W. Warmann Michael Schwarz | 2011 | Toxicology2011，，1： | 1 |
| 7 | Fluoride and calcium-phosphate coated sponges of the magnesium alloy AX30 as bone grafts: a comparative study in rabbits显示文摘 | Mareike Lalk Janin Reifenrath Nina Angrisani Alexandr Bondarenko Jan-Marten Seitz Peter P. Mueller Andrea Meyer-Lindenberg | 2013 | Journal of Materials Science: Materials in Medicine2013，，2： | 1 |
| 8 | Absolute high-resolution optical position encoder显示文摘 | KAI ENGELHARDT PETER SEITZ | 1996 | Applied Optics1996，，1： | 1 |
| 9 | High-resolution optical position encoder with large mounting tolerances显示文摘 | Kai Engelhardt Peter Seitz | 1997 | Applied Optics1997，36，13： | 1 |
| 10 | Absolute high-resolution optical position encoder显示文摘 | Kai Engelhardt Peter Seitz | 1996 | Applied Optics1996，35，1： | 1 |
| 11 | Impact of short-term versus long-term topical steroids on corneal neovascularization after non-high-risk keratoplasty显示文摘 | Claus Cursiefen Hartmut Wenkel Peter Martus Achim Langenbucher Nhung X. Nguyen Berthold Seitz Michael Küchle Gottfried O. Naumann | 2001 | Graefe’s Archive for Clinical and Experimental Ophthalmology2001，，7： | 1 |
| 12 | Antiviral effects of pan-caspase inhibitors on the replication of coxsackievirus B3显示文摘 | Ulrike Martin Nadine Jarasch Matthias Nestler Alexander Rassmann Thomas Munder Simone Seitz Roland Zell Peter Wutzler Andreas Henke | 2007 | Apoptosis2007，，3： | 1 |
| 13 | Some representations of exceptional Lie algebras显示文摘 | Peter B. Gilkey Gary M. Seitz | 1988 | Geometriae Dedicata (-)1988，，1： | 1 |
| 14 | Thrombolysis With Recombinant Tissue Plasminogen Activator and Tirofiban in Stroke: Preliminary Observations显示文摘 | Rüdiger J. Seitz Magnolia Hamzavi Ulrich Junghans Peter A. Ringleb Corinna Schranz Mario Siebler | 2003 | Stroke: Journal of the American Heart Association2003，，8： | 1 |
| 15 | Liver stiffness is directly influenced by central venous pressure显示文摘 | Gunda Millonig Stefanie Friedrich Stefanie Adolf Hamidreza Fonouni Mohammad Golriz Arianeb Mehrabi Peter Stiefel Gudrun P?schl Markus W. Büchler Helmut Karl Seitz Sebastian Mueller | 2009 | Journal of Hepatology2009，，2： | 1 |
| 16 | Giant Aneurysm of a Coronary-Pulmonary Artery Fistula:A Rare Cause of a Diastolic Murmur显示文摘A coronary-pulmonary artery fistula with giant aneurysmal dilatation is an extremely rare clinical constellation.The natural course of this disease and the incidence of complications are unknown.Hence,optimal treatment,particularly in asymptomatic patients,is still a matter of debate.Here we report a case of a 71-year-old asymptomatic woman with a diastolic murmur.Comprehensive cardiovascular assessments including cardiac computed tomography and invasive coronary angiography revealed a coronary-pulmonary artery fi stula with giant aneurysmal dilatation.The patient was managed conservatively and has now been followed up for 5 years without any events. | Andreas Seitz Sophie Schafer Maik Backes Heiko Mahrholdt Peter Ong | 2019 | Cardiovascular Innovations and Applications2019，，B07： | 0 |
| 17 | Does Coronary Microvascular Spasm Exist?Objective Evidence from Intracoronary Doppler Flow Measurements During Acetylcholine Testing显示文摘A 43-year-old woman with recurrent atypical angina underwent invasive coronary angiography including intracoronary Doppler blood flow assessment and coronary spasm provocation testing.While obstructive epicardial disease could be ruled-out angiographically,the patient experienced reproduction of her angina symptoms after intracoronary administration of acetylcholine(100μg)during spasm provocation testing.Simultaneously,the ECG showed new-onset ST-segment depression in the absence of epicardial spasm.In addition,coronary fl ow velocity was signifi cantly reduced after acetylcholine compared to the baseline condition.Following intracoronary administration of nitroglycerine(200μg),the patient’s symptoms as well as the ECG changes and coronary flow reduction were reversed.Considering the ongoing challenges in appropriate evaluation of the pathophysiological mechanisms of coronary microvascular dysfunction,simultaneous intracoronary Doppler flow measurement during spasm testing–as shown in this case–may provide objective evidence for microvascular spasm in addition to the standardized diagnostic criteria,especially if they are ambiguous. | Fabian Guenther Andreas Seitz Valeria Martinez Pereyra Raffi Bekeredjian Udo Sechtem Peter Ong | 2020 | Cardiovascular Innovations and Applications2020，，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员