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| 1 | Tree diversity and nectar composition affect arthropod visitors on extrafloral nectaries in a diversity experiment显示文摘Aims Plants with extrafloral nectaries(EFNs)are common in tropical and subtropical habitats and,despite many other arthropods also forage for EFN,most studies solely focused on the defense mutualisms between EFN plants and ants.This study aims at a quantitative assessment of the entire arthropod community that visits EFN trees to compare visitor communities between different tree species to disentangle the mechanisms that may drive EFN visitor community composition.We also test for tree diversity effects on EFN visitors,as it is unknown if local tree species richness relates to the abundance and species richness of arthropods foraging for EFN.Methods We sampled EFN-visiting arthropods in the experimental tree species richness gradient of the BEF-China Experiment,the currently largest forest diversity experiment in the world,and tested if tree species richness affects EFN visitors and if visitor community composition differs between EFN tree species.In a second step,we analyzed the EFN of Ailanthus altissima and Triadica cochinchinensis,the two EFN tree species with highest visitor abundance,for sugars and amino acids(AA)to test if tree species-specific differences in nectar chemistry translate to differing visitor communities.Lastly,we conducted a choice experiment using different artificial nectar solutions to test if nectar quality affects foraging decisions of ants,the most frequent EFN visitors in our study sites.Important Findings EFN trees in young successional forests in subtropical South-East China are visited by a diverse assemblage of arthropods including ants,beetles,flies,and spiders.Albeit ants accounted for about 75%of all individuals,non-ant visitors were by far more species rich.Visitor abundance and species richness declined with increasing tree species richness,suggesting a resource dilution effect,because plots with more tree species had proportionally less EFN tree individuals and thus lower nectar availability.Ailanthus altissima and T.cochinchinensis were visited by different arthropods and their nectar had species-specific AA composition and sugar concentration,indicating that differences in visitors may,at least partly,be explained by differences in nectar chemistry.These findings are supported by the choice experiment,in which artificial nectars containing sugar solutions supplemented with essential AAs attracted more ants than pure sugar solutions or sugar solutions supplemented with non-essential AAs.Our results improve the understanding of the complex ecology of EFN trees,a plant life form that might be crucial for understanding how tree diversity influences patterns of tree growth in young successional tropical and subtropical forests. | Michael Staab Joel Methorst Jan Peters Nico Blüthgen Alexandra-Maria Klein | 2017 | Journal of Plant Ecology2017，10，1： | 6 |
| 2 | Engineering Ontologies using Semantic Patterns显示文摘 | Steffen Staab Michael Erdmann Alexander Maedche | 2006 | LECTURE NOTES IN COMPUTER SCIENCE2006，，4053： | 1 |
| 3 | Oxygen-dependent regulation of NDRG1 in human glioblastoma cells invitro and in vivo显示文摘 | Harun Said Susanne Stein Carsten Hagemann Buelent Polat Adrian Staab Jelena Anacker Beate Schoemig Matthias Theobald Michael Flentje Dirk Vordermark | 2009 | Oncology Reports2009，，1： | 1 |
| 4 | 可萃取物和可浸出物的数据管理——E&L软件系统管理可萃取物和可浸出物显示文摘一种新的药物制剂要获得市场准入,必须针对其中的可萃取物和可浸出物(Extractables&Leacheables,缩写为E&L)进行有效的研究。本文报道了如何借助于一种新的软件系统,将通常大容量和多相的数据通过结构化处理加以管理。 | Michael Fuenfrocken Behnusch Athenstaedt Richard Staab | 2011 | 流程工业2011，，20： | 0 |
| 5 | Multiple forest structural elements are needed to promote beetle biomass, diversity and abundance显示文摘Background:Retention forestry is a management strategy aiming to mitigate biodiversity loss by retaining structural elements such as dead trees that would otherwise be removed.Here we analyze the biomass,diversity and abundance among forest beetles collected using window traps on 1281-ha forest sites reflecting gradients in the amount of structural elements in southwestern Germany.Results:We found that beetle biomass increased with mean diameter at breast height(a measure of tree size),and decreased with stand structural complexity.Biomass of individual feeding guilds responded differently to forest structural elements,namely lying deadwood,understory complexity,tree basal area and stand structural complexity.Beetle family diversity increased with the effective number of layers,i.e.1-m forest strata occupied by vegetation assessed via terrestrial laser scanning.Abundance of feeding guilds responded to only elevation and share of deciduous trees.Community composition in terms of biomass was structured by forest elements similar to biomass of individual feeding guilds,with the addition of lying deadwood.This differed from community composition in terms of abundance of feeding guilds,which was structured by primarily standing deadwood volume and share of deciduous trees.Conclusions:Our results show that biomass,diversity and abundance respond differently to forest structural elements.This suggests that the concurrent prioritization of multiple forest elements is needed to promote forest beetles,with more focus placed on the differing resource needs among feeding guilds.In addition,retention strategies should also consider the varying responses of beetle biodiversity metrics when assessing the importance of forest structural elements. | Nolan J.Rappa Michael Staab Julian Frey Nathalie Winiger Alexandra-Maria Klein | 2022 | Forest Ecosystems2022，9，5： | 0 |
| 6 | 可萃取物和可浸出物的数据管理 E&L软件系统管理可萃取物和可浸出物显示文摘一种新的药物制剂要获得市场准入.必须针对其中的可萃取物和可浸出物(Extractables&Leacheables,缩写为E&L)进行有效的研究。本文报道了如何借助于一种新的软件系统,将通常大容量的和多相的数据通过结构化处理加以管理。 | Michael Fuenfrocken Behnusch Athenstaedt Richard Staab | 2011 | 实验与分析2011，，3： | 0 |
| 7 | Inhibition of N-Myc down regulated gene 1 in in vitro cultured human glioblastoma cells显示文摘AIM: To study short ds RNA oligonucleotides(si RNA)as a potent tool for artificially modulating gene expression of N-Myc down regulated gene 1(NDRG1) gene induced under different physiological conditions(Normoxia and hypoxia) modulating NDRG1 transcription, m RNA stability and translation. METHODS: A cell line established from a patient with glioblastoma multiforme. Plasmid DNA for transfections was prepared with the Endofree Plasmid Maxi kit. From plates containing 5 × 107 cells, nuclear extracts were prepared according to previous protocols. The p SUPERNDRG1 vectors were designed, two sequences were selected from the human NDRG1 c DNA(5'-GCATTATTGGCATGGGAAC-3' and 5'-ATGCAGAGTAACGTGGAAG-3'. reverse transcription polymerase chain reaction was performed using primers designed using published information on β-actin and hypoxia-inducible factor(HIF)-1α m RNA sequences in Gen Bank. NDRG1 m RNA and protein level expression results under different conditions of hypoxia or reoxygenation were compared to aerobic control conditions using the Mann-Whitney U test. Reoxygenation values were also compared to the NDRG1 levels after 24 h of hypoxia(P < 0.05 was considered significant).RESULTS: si RNA- and iodoacetate(IAA)-mediated downregulation of NDRG1 m RNA and protein expression in vitro in human glioblastoma cell lines showed a nearly complete inhibition of NDRG1 expression when compared to the results obtained due to the inhibitory role of glycolysis inhibitor IAA. Hypoxia responsive elements bound by nuclear HIF-1 in human glioblastoma cells in vitro under different oxygenation conditions and the clearly enhanced binding of nuclear extracts from glioblastoma cell samples exposed to extreme hypoxic conditions confirmed the HIF-1 Western blotting results. CONCLUSION: NDRG1 represents an additional diagnostic marker for brain tumor detection, due to the role of hypoxia in regulating this gene, and it canrepresent a potential target for tumor treatment in human glioblastoma. The si RNA method can represent an elegant alternative to modulate the expression of the hypoxia induced NDRG1 gene and can help to monitor the development of the cancer disease treatment outcome through monitoring the expression of this gene in the patients undergoing the different therapeutic treatment alternatives available nowadays. | Harun M Said Buelent Polat Susanne Stein Mathias Guckenberger Carsten Hagemann Adrian Staab Astrid Katzer Jelena Anacker Michael Flentje Dirk Vordermark | 2012 | World Journal of Clinical Oncology2012，3，7： | 0 |
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