TY - GEN A1 - Boch, Steffen A1 - Allan, Eric A1 - Birkhofer, Klaus A1 - Bossdorf, Oliver A1 - Blüthgen, Nico A1 - Christ-Breulmann, Sabina A1 - Diekötter, Tim A1 - Dormann, Carsten F. A1 - Gossner, Martin M. A1 - Hallmann, Christine A1 - Hemp, Andreas A1 - Hölzel, Norbert A1 - Jung, Kirsten A1 - Klaus, Valentin H. A1 - Klein, Alexandra M. A1 - Kleinebecker, Till A1 - Lange, Markus A1 - Müller, Jörg A1 - Nacke, Heiko A1 - Prati, Daniel A1 - Renner, Swen C. A1 - Rothenwöhrer, Christoph A1 - Schall, Peter A1 - Schulze, Ernst-Detlef A1 - Socher, Stephanie A. A1 - Tscharntke, Teja A1 - Türke, Manfred A1 - Weiner, Christiane N. A1 - Weisser, Wolfgang W. A1 - Westphal, Catrin A1 - Wolters, Volkmar A1 - Wubet, Tesfaye A1 - Fischer, Markus T1 - Extensive und jährlich wechselnde Nutzungsintensität fördert den Artenreichtum im Grünland T2 - ANLIEGEN NATUR Y1 - 2016 UR - https://www.biom.uni-freiburg.de/mitarbeiter/dormann/boch2016anliegennatur.pdf SN - 1864-0729 VL - 38 IS - 1 SP - 86 EP - 95 ER - TY - GEN A1 - Hayat, Ahsan A1 - Spirito, Davide A1 - Corley-Wiciak, Agnieszka Anna A1 - Schubert, Markus Andreas A1 - Masood, Maria A1 - Reichmann, Felix A1 - Ratzke, Markus A1 - Capellini, Giovanni A1 - Fischer, Inga Anita T1 - MBE-based growth of Sn-rich quantum wells and dots at low Sn deposition rates T2 - Materials Science in Semiconductor Processing Y1 - 2023 U6 - https://doi.org/10.1016/j.mssp.2023.107693 SN - 1873-4081 VL - 165 ER - TY - PAT A1 - Bambach, Markus A1 - Fischer, Georg A1 - Röhrich, Tobias T1 - Verfahren und Anlage zur kombiniert additiven und umformenden Fertigung Y1 - 2017 ER - TY - GEN A1 - Fischer, Alfons A1 - Weiß, Sabine A1 - Wimmer, Markus A. T1 - The Tribological Difference between Biomedical Steels and CoCrMo-Alloys T2 - Journal of the Mechanical Behavior of Biomedical Materials Y1 - 2012 SN - 1878-0180 VL - 9 SP - 50 EP - 62 ER - TY - GEN A1 - Zaplata, Markus Klemens A1 - Winter, Susanne A1 - Biemelt, Detlef A1 - Fischer, Anton T1 - Immediate shift towards source dynamics: The pioneer species Conyza canadensis in an initial ecosystem T2 - Flora - Morphology, Distribution, Functional Ecology of Plants N2 - The aim of this study was to detect a potential temporal shift from sink to source dynamics of pioneer plants during primary succession. The study was done in an initial ecosystem, namely an artificially constructed catchment on Pleistocene sands in eastern Germany. The import and export of seeds (including soil seed bank and seed rain), the development of vegetation cover and the population size of all pioneer species were recorded in 2005–2009. The interplay between the spatial distribution of seed rain and the prevailing wind direction provide evidence that seeds of Conyza canadensis (Asteraceae) first and to a considerable amount left the developing ecosystem. A change from a sink to source dynamics was detected already in the first year of both the existence of the site and occurrence of C. canadensis individuals within the site. Population patterns at the landscape unit scale demonstrated extensive auto-correlations in the coverage of this invasive plant at first. Our results underline the pioneer traits of C. canadensis as a prolific seeder and excellent wind disperser, which enables this species to become rapidly dominant over relatively large areas. KW - colonization potential Y1 - 2011 U6 - https://doi.org/10.1016/j.flora.2011.07.001 VL - 206 IS - 11 SP - 928 EP - 934 ER - TY - GEN A1 - Ahmels, Peter A1 - Voß, Ulrike A1 - Gago, Aldo A1 - Lettenmeier, Philipp A1 - Voglstätter, Christopher A1 - Schmitz, Steffen A1 - Kleinickel, Cindy A1 - Barsch, Markus A1 - Rockmann, Rico A1 - Pumpa, Martin A1 - Fischer, Ulrich A1 - Voigt, André T1 - Wasserstoff zur Windenergiespeicherung – Ergebnisse des Projektes WESpe T2 - HZwei: das Magazin für Wasserstoff und Brennstoffzellen KW - Wasserstoff KW - Energiespeicherung Y1 - 2018 UR - https://www.hzwei.info/wp-content/uploads/2019/03/HZwei_April_2018.pdf SN - 1862-393X VL - 18 IS - 2 SP - 28 EP - 30 ER - TY - GEN A1 - Zaplata, Markus Klemens A1 - Winter, Susanne A1 - Fischer, Anton A1 - Kollmann, Johannes A1 - Ulrich, Werner T1 - Species-driven phases and increasing structure in early-successional plant communities T2 - The American Naturalist N2 - Successional phases describe changes in ecological communities that proceed in steps rather than continuously. Despite their importance for the understanding of ecosystem development, there still exists no reliable definition of phases and no quantitative measure of phase transitions. In order to obtain these data, we investigated primary succession in an artificial catchment (6 ha) in eastern Germany over a period of 6 years. The data set consists of records of plant species and their cover values, and initial substrate properties, both from plots in a regular grid (20 m × 20 m) suitable for spatial data analysis. Community assembly was studied by analyses of species co-occurrence and nestedness. Additionally, we correlated lognormal and log series distributions of species abundance to each community. We here introduce a new general method for detection of successional phases based on the degree of transient spatial homogeneity in the study system. Spatially coherent vegetation patterns revealed non-overlapping partitions within this sequence of primary succession and were characterized as two distinct ecological phases. Patterns of species co-occurrence were increasingly less random, and hence the importance of demographic stochasticity and neutral community assembly decreased during the study period. Our findings highlight the spatial dimension of successional phases and quantify the degree of change between these steps. They are an element for advancing a more reliable terminology of ecological successions. KW - spatial analysis Y1 - 2013 U6 - https://doi.org/10.1086/668571 VL - Vol. 181 IS - 1 SP - E17 EP - E27 ER - TY - GEN A1 - Zaplata, Markus Klemens A1 - Winter, S. A1 - Biemelt, Detlef A1 - Fischer, A. T1 - Colonization potential of the opportunistic herb Conyza canadensis at the landscape scale in an initial catchment Y1 - 2010 ER - TY - GEN A1 - Weinhardt, Lothar A1 - Fuchs, Oliver A1 - Fischer, André A1 - Weigand, Markus A1 - Meyer, Frank A1 - Benkert, Andreas A1 - Blum, Monika A1 - Bär, Marcus A1 - Pookpanratana, Sujitra A1 - Denlinger, Jonathan D. A1 - Heske, Clemens A1 - Umbach, Eberhard T1 - Site- and Symmetry-resolved Resonant X-ray Emission Study of a Highly-ordered PTCDA Thin Film T2 - The Journal of Physical Chemistry: C Y1 - 2016 U6 - https://doi.org/10.1021/acs.jpcc.5b12422 SN - 1932-7447 SN - 1932-7455 VL - 120 IS - 16 SP - 8607 EP - 8615 ER - TY - GEN A1 - Nitsch, Paul-G. A1 - Ratzke, Markus A1 - Pozarowska, Emilia A1 - Flege, Jan Ingo A1 - Alvarado Chavarin, Carlos A1 - Wenger, Christian A1 - Fischer, Inga Anita T1 - Deposition of reduced ceria thin films by reactive magnetron sputtering for the development of a resistive gas sensor T2 - Verhandlungen der DPG, Berlin 2024 N2 - The use of cerium oxide for hydrogen sensing is limited by the low electrical conductivity of layers deposited from a ceria target. To increase the electrical conductivity, partially reduced cerium oxide layers were obtained from a metallic cerium target by reactive magnetron sputtering. The proportions of the oxidation states Ce3+, present in reduced species, and Ce4+, present in fully oxidized species, were determined by ex-situ XPS. For electrical characterization, films were deposited on planarized tungsten finger electrodes. IV curves were measured over several days to investigate possible influences of oxygen and humidity on electrical conductivity. The morphological stability of the layers under ambient conditions was investigated by microscopical methods. The XPS results show a significant amount of Ce3+ in the layers. The electrical conductivity of as-grown samples is several orders of magnitude higher than that of samples grown from a ceria target. However, the conductivity decreases over time, indicating an oxidation of the layers. The surface morphology of the samples was found to be changing drastically within days, leading to partial delamination. KW - ceria KW - metalic cerium target KW - electrical conductivity KW - X-ray photoelectron spectroscopy (XPS) KW - oxidation states KW - morphology Y1 - 2024 UR - https://www.dpg-verhandlungen.de/year/2024/conference/berlin/part/ds/session/11/contribution/18 SN - 0420-0195 PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER -