@phdthesis{Fischer, author = {Fischer, Ulrich}, title = {Eigenspannungen und Dehnungen bei gekoppelten, solarthermisch induzierten Temperatur- und Feuchtefeldern}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-000000182}, language = {de} } @inproceedings{RogassRudtschStrangfeldetal., author = {Rogaß, Harald and Rudtsch, Steffen and Strangfeld, Peter and Fischer, Ulrich}, title = {Thermal flux measurements on moist porous concrete}, series = {Thermal conductivity 23, proceedings of the Twenty-Third International Thermal Conductivity Conference, October 29 to November 1, 1995, Nashville, Tennessee}, booktitle = {Thermal conductivity 23, proceedings of the Twenty-Third International Thermal Conductivity Conference, October 29 to November 1, 1995, Nashville, Tennessee}, publisher = {Lancaster, Pa. [u.a.]}, address = {Technomic Publ.}, isbn = {1-566-76477-7}, language = {en} } @inproceedings{RogassFischer, author = {Rogaß, Harald and Fischer, Ulrich}, title = {Investigation of the Drying Process of Moist Building Materials by Means of Heat Flux Density Measurements}, series = {Non-destructive testing in civil engineering 2000, proceedings of the 5th International Symposium Non-Destructive Testing in Civil Engineering, Tokyo, Japan, 25 - 27 April 2000}, booktitle = {Non-destructive testing in civil engineering 2000, proceedings of the 5th International Symposium Non-Destructive Testing in Civil Engineering, Tokyo, Japan, 25 - 27 April 2000}, editor = {Uomoto, Taketo}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, isbn = {0-08-043717-6}, pages = {181 -- 190}, language = {en} } @inproceedings{FischerRogass, author = {Fischer, Ulrich and Rogaß, Harald}, title = {Investigations on the thermo- and hygromechanical behaviour of a transparently insulated sand-lime- brick wall}, language = {en} } @misc{FischerHaeuslerRogassetal., author = {Fischer, Ulrich and H{\"a}usler, Tobias and Rogaß, Harald and Rottmann, M. and Kraft, A. and Heckner, K.-H.}, title = {Heat Transport and Thermal Expansion of Electrochromic Glazing Systems due to Solar Irradiation}, series = {International Journal of Thermophysics}, volume = {25}, journal = {International Journal of Thermophysics}, number = {4}, issn = {1572-9567}, pages = {1299 -- 1307}, language = {en} } @article{RiebelFischerLeubner, author = {Riebel, Ulrich and Fischer, Reiko and Leubner, Holger}, title = {Ein Filterpr{\"u}fstand in Anlehnung an Richtlinie : Erfahrungsberichte aus der Anwendung der Richtlinie VDI 3926}, language = {de} } @inproceedings{Fischer, author = {Fischer, Ulrich}, title = {Thermal Conductivity and Melting Point Measurements on Paraffin Zeolite Mixtures}, series = {17th European Conference on Thermophysical Properties, ECTP Bratislava 2005}, booktitle = {17th European Conference on Thermophysical Properties, ECTP Bratislava 2005}, address = {Bratislava}, isbn = {80-8050-874-7}, language = {en} } @incollection{FischerRabannKrautz, author = {Fischer, Ulrich and Rabann, Bernd and Krautz, Hans Joachim}, title = {Wasserstoff - Elektrolyse}, series = {Erneuerbare Energien : VBI-Leitfaden}, booktitle = {Erneuerbare Energien : VBI-Leitfaden}, edition = {1. Auflage}, publisher = {Verband Beratender Ingenieure}, address = {Berlin}, pages = {85 -- 92}, language = {de} } @inproceedings{ZiemsFischerKrautzetal., author = {Ziems, Christian and Fischer, Ulrich and Krautz, Hans Joachim and Luschtinetz, Thomas and Lehmann, Jochen}, title = {Project presentation-Novel 3D porous electrode materials for more efficient alkaline water electrolysis-AEL3D}, series = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2016, 23. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 3. - 5. November 2016}, booktitle = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2016, 23. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 3. - 5. November 2016}, publisher = {Fachhochschule}, address = {Stralsund}, isbn = {978-3-9817740-1-6}, pages = {175 -- 181}, language = {en} } @inproceedings{FischerTannertVoigtetal., author = {Fischer, Ulrich and Tannert, Daniel and Voigt, Andre and Ziems, Christian and Krautz, Hans Joachim and Barz, Mirko and Dinkler, Konstantin}, title = {Renewable Energy Storage by Hydrogen Production from Water Electrolysis}, series = {Technical and Economic Aspects of Renewable Energies - Know-How Transfer as Development Opportunity for Southern Europe}, booktitle = {Technical and Economic Aspects of Renewable Energies - Know-How Transfer as Development Opportunity for Southern Europe}, publisher = {Mensch und Buch}, address = {Berlin}, isbn = {978-3-86387-721-7}, pages = {118 -- 126}, language = {en} } @incollection{FischerKrautzWenskeetal., author = {Fischer, Ulrich and Krautz, Hans Joachim and Wenske, Michael and Tannert, Daniel and Kr{\"u}ger, Perco and Ziems, Christian and Stolten, Detlef and Emonts, Bernd}, title = {Hydrogen Hybrid Power Plant in Prenzlau, Brandenburg}, series = {Hydrogen Science and Engineering - Materials, Processes, Systems and Technology, Bd. 2}, booktitle = {Hydrogen Science and Engineering - Materials, Processes, Systems and Technology, Bd. 2}, publisher = {Wiley-VCH}, address = {Weinheim}, isbn = {978-3-5273323-8-0}, pages = {1033 -- 1052}, language = {en} } @misc{BacherLebedynskyyFischeretal., author = {Bacher, Christian and Lebedynskyy, Volodymyr and Fischer, Silvio and Riebel, Ulrich}, title = {Discharge electrode geometry and energy efficiency in a one-stage wire-tube electrostatic precipitator operating at high concentrations of submicron liquid aerosol}, series = {Environmental Technology}, journal = {Environmental Technology}, issn = {0959-3330}, doi = {10.1080/09593330.2018.1555613}, pages = {13}, abstract = {In order to help answering the question "Which electrode design is the best?", the precipitation performance of a tubular ESP was determined for different electrode designs with special attention to specific energy consumption. Experiments were conducted in a wire-tube arrangement with a high loading of liquid submicron particles causing strong space charge effects, also known as corona quenching. The experiments are supplemented by numerical simulation results showing the effect of residence time and power consumption on separation efficiency.}, language = {en} } @misc{TannertZiemsVoigtetal., author = {Tannert, Daniel and Ziems, Christian and Voigt, Andr{\´e} and Fischer, Ulrich and Krautz, Hans Joachim}, title = {Wasserstoff- und Elektrolyseforschung an der BTU Cottbus - Senftenberg}, series = {VGB PowerTech}, volume = {98}, journal = {VGB PowerTech}, number = {8}, issn = {1435-3199}, pages = {65 -- 69}, language = {de} } @misc{ZiemsFischerKrautz, author = {Ziems, Christian and Fischer, Ulrich and Krautz, Hans Joachim}, title = {Entwicklung und anwendungsbezogene Charakterisierung von effizienten, hochleistungsf{\"a}higen 3D-Elektrodenmaterialien f{\"u}r die alkalische Druckelektrolysetechnologie}, series = {VGB PowerTech}, volume = {98}, journal = {VGB PowerTech}, number = {8}, issn = {1435-3199}, pages = {70 -- 74}, language = {de} } @inproceedings{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andre and Tannert, Daniel and Krautz, Hans Joachim}, title = {Pressure and Temperature Influence on Alkine Electrolysis Performance}, series = {Proceedings of 5th European PEFC and H2 Forum, Luzern, Schweiz, June/July 2015}, booktitle = {Proceedings of 5th European PEFC and H2 Forum, Luzern, Schweiz, June/July 2015}, publisher = {European Fuel Cell Forum AG}, address = {Luzern-Adligenswil}, isbn = {978-3-905592-19-1}, language = {en} } @inproceedings{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andre and Tannert, Daniel and Krautz, Hans Joachim}, title = {Druckelektrolyse zur Wasserstoffherstellung- eine Kurz{\"u}bersicht zu energetischen Vor- und Nachteilen}, series = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2015, 22. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 5. - 7. November 2015}, booktitle = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2015, 22. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 5. - 7. November 2015}, publisher = {Fachhochschule Stralsund}, address = {Stralsund}, isbn = {978-3-9817740-0-9}, pages = {30 -- 36}, language = {de} } @inproceedings{KruegerNimtzFischeretal., author = {Kr{\"u}ger, Perco and Nimtz, Michael and Fischer, Ulrich and Krautz, Hans Joachim}, title = {Simulation des Einsatzes von kapazitiv begrenzten Anlagen in der Prim{\"a}rregelleistung}, series = {Kraftwerkstechnik 2015, Strategien, Anlagentechnik und Betrieb,Beitr{\"a}ge des 47. Kraftwerkstechnischen Kolloquiums vom 13. und 14. Oktober 2015 in Dresden}, booktitle = {Kraftwerkstechnik 2015, Strategien, Anlagentechnik und Betrieb,Beitr{\"a}ge des 47. Kraftwerkstechnischen Kolloquiums vom 13. und 14. Oktober 2015 in Dresden}, publisher = {SAXONIA}, address = {Freiberg}, isbn = {978-3-934409-70-5}, pages = {667 -- 682}, language = {de} } @inproceedings{KruegerNimtzFischeretal., author = {Kr{\"u}ger, Perco and Nimtz, Michael and Fischer, Ulrich and Krautz, Hans Joachim}, title = {Einsatzsimulation zur Erbringung von Prim{\"a}rregelleistung mit Batteriespeichern}, series = {Nachhaltige Energieversorgung und Integration von Speichern, Tagungsband zur NEIS 2015}, booktitle = {Nachhaltige Energieversorgung und Integration von Speichern, Tagungsband zur NEIS 2015}, editor = {Schulz, Detlef}, publisher = {Springer}, address = {Wiesbaden}, isbn = {978-3-658-10957-8}, pages = {95 -- 101}, language = {de} } @article{RogassFischerRudtsch, author = {Rogaß, Harald and Fischer, Ulrich and Rudtsch, Steffen}, title = {Thermisch-hygrische Untersuchungen an frischem Porenbeton}, language = {de} } @inproceedings{RogassFischer, author = {Rogaß, Harald and Fischer, Ulrich}, title = {Untersuchungen zu thermisch-hygrischen Spannungs- und Dehnungszust{\"a}nden sowie zum hygrischen Verhalten transparent ged{\"a}mmter Aussenw{\"a}nde}, series = {4. Zittauer Niedrigenergiehaus-Kolloquium mit Symposium "Energieeffizienter Nichtwohnungsbau", Zittau, 17. und 18. Januar 2002}, booktitle = {4. Zittauer Niedrigenergiehaus-Kolloquium mit Symposium "Energieeffizienter Nichtwohnungsbau", Zittau, 17. und 18. Januar 2002}, publisher = {Rektor der Hochschule}, address = {Zittau/G{\"o}rlitz}, pages = {158 -- 170}, language = {de} } @inproceedings{FischerRogass, author = {Fischer, Ulrich and Rogaß, Harald}, title = {Experimentelle Bestimmungen des hygrischen Ausdehnungskoeffizienten bei ausgew{\"a}hlten Baustoffen}, language = {de} } @inproceedings{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andre and Tannert, Daniel and Krautz, Hans Joachim}, title = {Influence of variable operating parameters on the process of the advanced alkaline pressurised electrolysis}, series = {9th International Renewable Energy Storage Conference and Exhibition (IRES 2015), 09 - 11 March 2015, D{\"u}sseldorf, Germany}, booktitle = {9th International Renewable Energy Storage Conference and Exhibition (IRES 2015), 09 - 11 March 2015, D{\"u}sseldorf, Germany}, publisher = {EUROSOLAR [u.a.]}, address = {Bonn}, language = {en} } @misc{AhmelsVossGagoetal., author = {Ahmels, Peter and Voß, Ulrike and Gago, Aldo and Lettenmeier, Philipp and Voglst{\"a}tter, Christopher and Schmitz, Steffen and Kleinickel, Cindy and Barsch, Markus and Rockmann, Rico and Pumpa, Martin and Fischer, Ulrich and Voigt, Andr{\´e}}, title = {Wasserstoff zur Windenergiespeicherung - Ergebnisse des Projektes WESpe}, series = {HZwei: das Magazin f{\"u}r Wasserstoff und Brennstoffzellen}, volume = {18}, journal = {HZwei: das Magazin f{\"u}r Wasserstoff und Brennstoffzellen}, number = {2}, issn = {1862-393X}, pages = {28 -- 30}, language = {de} } @misc{FischerVoigtTannertetal., author = {Fischer, Ulrich and Voigt, Andr{\´e} and Tannert, Daniel and Krautz, Hans Joachim}, title = {Standortevaluierung und System-pfadanalyse im Forschungsprojekt WESpe - Wissenschaftliche Forschung zu Windwasserstoff-Energiespeichern}, series = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2016 ; energie-symposium, 23. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 3. - 5. November 2016}, volume = {2016}, journal = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2016 ; energie-symposium, 23. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 3. - 5. November 2016}, publisher = {Fachhochschule Stralsund}, address = {Stralsund}, isbn = {978-3-9817740-1-6}, pages = {143 -- 147}, language = {de} } @misc{VoigtFischerTannertetal., author = {Voigt, Andr{\´e} and Fischer, Ulrich and Tannert, Daniel and Krautz, Hans Joachim}, title = {Analyse erneuerbarer P2H2 Energiesystemkonfigurationen unter Verwendung von Matlab}, series = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2017 ; 24. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 09. bis 11. November 2017}, journal = {Nutzung regenerativer Energiequellen und Wasserstofftechnik 2017 ; 24. Symposium Nutzung Regenerativer Energiequellen und Wasserstofftechnik, Stralsund, 09. bis 11. November 2017}, publisher = {HOST - Hochschule Stralsund}, address = {Stralsund}, isbn = {978-3-9817740-3-0}, pages = {143 -- 147}, language = {de} } @misc{BusseFischerGebaueretal., author = {Busse, Ralph-Peter and Fischer, Gert and Gebauer, Gert and H{\"o}fler, Frank and Junker, Sabine and Kramer, Thomas and Opperskalski, Stephan and Potthoff, Ulrich and Remus, Ricardo and Schlamkow, Christian and Schmidt, Wolfgang and Scobel, Ekkehard and Stopp, Horst and Strangfeld, Peter and Trang, Ngyen Thi Thu and V{\"o}lker, Eduard and Vukorep, Ilija and Weidhase, Frieder and Winzer, Reinhard}, title = {Floating Architecture - Construction on and near water}, editor = {Stopp, Horst and Strangfeld, Peter}, publisher = {LIT-Verlag}, address = {Berlin}, isbn = {978-3-643-90910-7}, pages = {134}, abstract = {The publishers are receiving more and more inquiries about the topic "Floating Architecture", particularly about technical details, water chemistry, as well as ice and wave problems. Since there is a lack of technical literature on this topic, most students working on projects or theses related to this topic send their inquiries. A time of general and quick changes results in a large number of daily publications. Therefore it is difficult to understand why there is a lack of lit-erature about floating structures. One has to consider that sea levels will continue to rise and consequently a larger number of people will have to live on the surface of the sea. Obviously, some expert knowledge is required which needs a longer period of time to be gained through scientific advancements and experience. The publishers, who have been dealing with the topic of floating houses for some years, are grateful to the authors for their agreement to allow the publication of their papers on floating architecture. These papers were mainly prepared for two conferences on floating architecture held in the study centre of the IBA building, Großr{\"a}schen. Therefore, the reader should know that, along with the usual papers, only a selection of self-explaining transparencies is shown in order to meet the printing requirements. The included list of both the authors and their addresses makes it easy for interested people to send any inquiries to them. A short introduction as well as an outlook at the end of each paper is meant to draw attention to current events in order to be able to promptly identify opportunities and risks connected with living on the water.}, language = {en} } @misc{ZaplataWinterFischeretal., author = {Zaplata, Markus Klemens and Winter, Susanne and Fischer, Anton and Kollmann, Johannes and Ulrich, Werner}, title = {Species-driven phases and increasing structure in early-successional plant communities}, series = {The American Naturalist}, volume = {Vol. 181}, journal = {The American Naturalist}, number = {1}, doi = {10.1086/668571}, pages = {E17 -- E27}, abstract = {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.}, language = {en} } @inproceedings{RogassFischer, author = {Rogaß, Harald and Fischer, Ulrich}, title = {Optimierung von TWD-Speichersystemen unter Beachtung der Bauschadensfreiheit}, publisher = {Fachinformationszentrum Karlsruhe}, address = {Eggenstein-Leopoldshafen}, language = {de} } @inproceedings{Fischer, author = {Fischer, Ulrich}, title = {Untersuchungen zum thermo- und hygromechanischen Verhalten transparent ged{\"a}mmter W{\"a}nde}, language = {de} } @misc{BacherRiebelLebedynskyyetal., author = {Bacher, Christian and Riebel, Ulrich and Lebedynskyy, Volodymyr and Fischer, Silvio}, title = {Discharge electrode geometries and energy efficiency in one-stage electrostatic precipitators at high aerosol concentration}, series = {ICESP 2018, Charlotte, USA, 9-11 October 2018}, journal = {ICESP 2018, Charlotte, USA, 9-11 October 2018}, pages = {7}, abstract = {In order to help answering the question "Which electrode design is the best?", the precipitation performance of a tubular ESP was determined for different electrode designs with special attention to specific energy consumption. Experiments were conducted in a wire-tube arrangement with a high loading of liquid submicron particles. The experiments are supplemented by numerical simulation results showing the effect of residence time and power consumption on separation efficiency. By combining the own experimental results with seemingly contradicting statements of the literature, the authors provide also some general guidelines for discharge electrode design when designing or upgrading electrostatic precipitator plants.}, language = {en} } @inproceedings{Fischer, author = {Fischer, Ulrich}, title = {Thermal Conductivity and Heat Capacity Measurements of Paraffin Embedded in a Porous Matrix}, series = {Proceedings, Thermal conductivity 28, thermal expansion 16, joint conferences, June 26 - 29, 2005}, booktitle = {Proceedings, Thermal conductivity 28, thermal expansion 16, joint conferences, June 26 - 29, 2005}, publisher = {DEStech Publ.}, address = {Lancaster, Pa.}, isbn = {1-932078-59-2}, pages = {517 -- 524}, language = {en} } @inproceedings{HaeuslerFischerRottmannetal., author = {H{\"a}usler, Tobias and Fischer, Ulrich and Rottmann, M. and Kraft, A. and Heckner, K.-H.}, title = {Solar Optical Properties and Daylight Potential of Electrochromic Windows}, series = {World Renewable Energy Congress VIII, book of abstracts, Denver, Colorado USA USA, August 29 - September 3, 2004}, booktitle = {World Renewable Energy Congress VIII, book of abstracts, Denver, Colorado USA USA, August 29 - September 3, 2004}, publisher = {National Renewable Energy Laboratory}, address = {Golden}, pages = {S. 195}, language = {en} } @inproceedings{Fischer, author = {Fischer, Ulrich}, title = {The determination of the heat of adsorption in dependence on the water vapor partial pressure of zeolites for heat storage purposes}, series = {Futurestock 2003, 9th International Conference on Thermal Energy Storage, Warsaw, Poland, September 1-4, 2003, proceedings, Vol. 1}, booktitle = {Futurestock 2003, 9th International Conference on Thermal Energy Storage, Warsaw, Poland, September 1-4, 2003, proceedings, Vol. 1}, publisher = {Warsaw University of Technology}, address = {Warsaw}, isbn = {83-7207-435-6}, pages = {S. 431 ff}, language = {en} } @misc{BacherLebedynskyyRiebeletal., author = {Bacher, Christian and Lebedynskyy, Volodymyr and Riebel, Ulrich and Fischer, Silvio}, title = {Electrode Shape and Efficiency in wet wire-tube Electrostatic Precipitators at high aerosol concentration}, language = {en} } @misc{UlrichPiwczynskiZaplataetal., author = {Ulrich, Werner and Piwczynski, Marcin and Zaplata, Markus Klemens and Winter, Susanne and Schaaf, Wolfgang and Fischer, Anton}, title = {Small-scale spatial variability in phylogenetic community structure during early plant succession depends on soil properties}, series = {Oecologia}, volume = {175}, journal = {Oecologia}, number = {3}, doi = {10.1007/s00442-014-2954-2}, pages = {985 -- 995}, abstract = {During early plant succession, the phylogenetic structure of a community changes in response to important environmental filters and emerging species interactions. We traced the development of temperate-zone plant communities during the first 7 years of primary succession on catchment soils to explore patterns of initial species assembly. We found pronounced small-scale differences in the phylogenetic composition of neighbouring plant assemblages and a large-scale trend towards phylogenetic evenness. This small-scale variability appears to be mediated by soil properties, particularly carbonate content. Therefore, abiotic environmental conditions might counteract or even supersede the effects of interspecific competition among closely related species, which are usually predicted to exhibit patterns of phylogenetic evenness. We conclude that theories on phylogenetic community composition need to incorporate effects of small-scale variability of environmental factors.}, language = {en} } @misc{UlrichZaplataWinteretal., author = {Ulrich, Werner and Zaplata, Markus Klemens and Winter, Susanne and Schaaf, Wolfgang and Fischer, Anton and Soliveres, Santiago and Gotelli, Nicholas J.}, title = {Species interactions and random dispersal rather than habitat filtering drive community assembly during early plant succession}, series = {Oikos}, volume = {125}, journal = {Oikos}, number = {5}, doi = {10.1111/oik.02658}, pages = {698 -- 707}, abstract = {Theory on plant succession predicts a temporal increase in the complexity of spatial community structure and of competitive interactions: initially random occurrences of early colonising species shift towards spatially and competitively structured plant associations in later successional stages. Here we use long-term data on early plant succession in a German post mining area to disentangle the importance of random colonisation, habitat filtering, and competition on the temporal and spatial development of plant community structure. We used species co-occurrence analysis and a recently developed method for assessing competitive strength and hierarchies (transitive versus intransitive competitive orders) in multispecies communities. We found that species turnover decreased through time within interaction neighbourhoods, but increased through time outside interaction neighbourhoods. Successional change did not lead to modular community structure. After accounting for species richness effects, the strength of competitive interactions and the proportion of transitive competitive hierarchies increased through time. Although effects of habitat filtering were weak, random colonization and subsequent competitive interactions had strong effects on community structure. Because competitive strength and transitivity were poorly correlated with soil characteristics, there was little evidence for context dependent competitive strength associated with intransitive competitive hierarchies.}, language = {en} } @misc{UlrichPiwczynskiZaplataetal., author = {Ulrich, Werner and Piwczynski, Marcin and Zaplata, Markus Klemens and Winter, Susanne and Schaaf, Wolfgang and Fischer, Anton}, title = {Soil conditions and phylogenetic relatedness influence total community trait space during early plant succession}, series = {Journal of Plant Ecology}, volume = {7}, journal = {Journal of Plant Ecology}, number = {4}, doi = {10.1093/jpe/rtt048}, pages = {321 -- 329}, abstract = {The total space of traits covered by the members of plant communities is an important parameter of ecosystem functioning and complexity. We trace the variability of trait space during early plant succession and ask how trait space co-varies with phylogenetic community structure and soil conditions. Particularly, we are interested in the small-scale variability in trait space and the influence of biotic and abiotic filters. We use data on species richness and soil conditions from the first 7 years of initial succession of an artificial catchment in north-eastern Germany. Total functional attribute diversity serves as a proxy to total trait space. Total trait space steadily increased during succession. We observed high small-scale variability in total trait space that was positively correlated with species richness and phylogenetic segregation and negatively correlated with total plant cover. Trait space increased with soil carbonate content, while pH and the fraction of sandy material behaved indifferently. Our results indicate that during early succession, habitat filtering processes gain importance leading to a lesser increase in trait space than expected from the increase in species richness alone.}, language = {en} } @misc{WinterZaplataRzannyetal., author = {Winter, Susanne and Zaplata, Markus Klemens and Rzanny, Michael and Schaaf, Wolfgang and Fischer, Anton and Ulrich, Werner}, title = {Increasing ecological multifunctionality during early plant succession}, series = {Plant Ecology}, volume = {220}, journal = {Plant Ecology}, number = {4-5}, issn = {1573-5052}, doi = {10.1007/s11258-019-00930-3}, pages = {499 -- 509}, abstract = {Ecological multifunctionality quantifies the functional performance of various important plant traits and increases with growing structural habitat heterogeneity, number of plant functional traits, and species richness. However, the successional changes in multifunctionality have not been traced so far. We use quantitative plant samples of 1 m2 plots from the first 6 years of initial vegetation dynamics in a German created catchment to infer the temporal changes in plant functional trait space and multifunctionality. Multifunctionality at the plot level was in all study years lower than expected from a random sample of the local pool of potential colonizers and was lowest at intermediate states of succession. In each year species containing a specific set of traits occurred with limited but focused functionality. The observed average low degree of multifunctionality contrasts with recent models predicting a tendency towards maximum multifunctionality during plant community development. However, variability in multifunctionality among plots increased during succession and the respective multifunctionality distribution among plots was increasingly right skewed indicating an excess of plots with relatively high multifunctionality. This relative excess of plots with high multifunctionality might act as an important trigger of community development paving the way for new species and functions to become established.}, language = {en} } @inproceedings{ZaplataKollmannUlrichetal., author = {Zaplata, Markus Klemens and Kollmann, Johannes and Ulrich, Werner and Winter, Susanne and Schaaf, Wolfgang and Elmer, Michael and Gerwin, Werner and Fischer, Anton}, title = {Cover balance or degree of autocorrelation? It is the same and integratively traces pattern formation during succession}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, pages = {228 -- 229}, abstract = {It is widely acknowledged that increasing complexity is a key attribute of ecosystem genesis. This is particularly true for primary succession on homogeneous substrates. However, a mechanistic understanding of spatial colonisation and pattern formation during primary succession has not been achieved yet. Thus, we studied this topic for 7 years within an experimental catchment (6 ha) established in the post-mining landscape of eastern Germany. Equidistant permanent plots (120 plots {\`a} 25m²) allowed for autocorrelation analyses, and thus tracing the spatial development of species cover performance. For each species tested, the "cover balance" first increased due to colonization, while decreasing in the course of succession. Drawing a benefit from these temporal trends, we suggested cover balance levels revealed by autocorrelation analyses to best indicate well-defined phases in primary succession at spatial entities. Hence, with the help of this spatial approach, terrestrial succession can be understood now much better at the most general level of the hierarchy provided by Pickett et al. (1987). In accordance with these authors, at subordinated levels of the causal hierarchy differential species performance might get collectively explained by contributing processes or conditions, such as ecophysiological traits, life history strategies, competition and allelopathy of the occurring plant species. Further research is needed to understand their relative contributions to the pattern formation.}, language = {en} }