Publikationen
Artikel
Forschungsartikel (Zeitschriften)
- . . ‘Hoefkenia hunsrueckensis, a New Genus and Species from Europe, and the Identity of Virescentia vogesiaca (F.W.Schultz ex Skuja) Necchi, D.C.Agostinho & M.L.Vis (Batrachospermales, Rhodophyta).’ Diversity 16, Nr. 8: 473. doi: 10.3390/d16080473.
- . . ‘The de novo genome of the Black-necked Snakefly (Venustoraphidia nigricollis Albarda, 1891): A resource to study the evolution of living fossils .’ The Journal of heredity 115, Nr. 1: 112–119. doi: 10.1093/jhered/esad074.
- . . ‘BarKeeper – A versatile web framework to assemble, analyze, and manage DNA barcoding data and metadata.’ Methods in Ecology and Evolution Early View. doi: 10.1111/2041-210X.14047.
- . . ‘The genome of the pygmy right whale illuminates the evolution of rorquals.’ BMC Biology 21, Nr. 79. doi: 10.1186/s12915-023-01579-1.
- . . ‘Genomic Impact of Whaling in North Atlantic Fin Whales.’ Molecular Biology and Evolution 39, Nr. 5. doi: 10.1093/molbev/msac094.
- . . ‘Soil moisture level and substrate type determine long-term seed lifespan in a soil seed bank.’ Plant and Soil 477: 475–485. doi: 10.1007/s11104-022-05449-7.
- . . „Alltagsvorstellungen zum Platzen von Kirschen im Kontext der Modellkompetenz.“ MNU Journal 74: 50–53.
- . . ‘Biology student teachers’ interest and self-efficacy in planning and conducting field trips after participation in a university course.’ Environmental Education Research 27: 88–109. doi: 10.1080/13504622.2020.1849565.
- . . ‘WARPP - web application for the research of parasitic plants.’ Plant Physiology 185: 1374–1380. doi: 10.1093/plphys/kiaa105.
- . . „Studierende in der Rolle von Exkursionsleiterinnen und Exkursionsleitern – Auswirkungen auf Interesse, Einstellungen und Selbstwirksamkeit.“ Natur und Landschaft 6-2020: 269–275.
- . . ‘Clonal diversity and genetic variation of the sedge Carex nigra in an alpine fen depend on soil nutrients.’ PeerJ — the Journal of Life and Environmental Sciences 8, Nr. e8887. doi: 10.7717/peerj.8887.
- . . ‘Addendum to Hypnum subcomplanatum Hedenäs, Schlesak, D. Quandt.’ Bryophyte Diversity and Evolution 41, Nr. 1: 1–1.
- . . ‘JPhyloIO: A Java library for event-based reading and writing of different phylogenetic file formats through a common interface.’ BMC Bioinformatics 20, Nr. 1: 402. doi: 10.1186/s12859-019-2982-3.
- . . ‘The weedy parasite Phelipanche aegyptiaca attacks Brassica rapa var. rapa L. for the first time in Israel.’ Plant Disease 2019: 1. doi: 10.1094/PDIS-02-19-0285-PDN.
- . . ‘Morphology, geographic distribution, and host preferences are poor predictors of phylogenetic relatedness in the mistletoe genus Viscum L.’ Molecular Phylogenetics and Evolution 131: 106–115. doi: 10.1016/j.ympev.2018.10.041.
- . . ‘Pollen characters and DNA sequence data converge on a monophyletic genus Iresine (Amaranthaceae, Caryophyllales) and help to elucidate its species diversity.’ Taxon 67: 944–976. doi: 10.12705/675.7.
- . . ‘Cleaning a taxonomic dustbin: placing the European Hypnum species in a phylogenetic context!’ Bryophyte Diversity and Evolution 40, Nr. 2: 37–54. doi: 10.11646/bde.40.2.3.
- . . ‘Evolution of a sucker: Functional principles of traps in carnivorous bladderworts (Utricularia, Lentibulariaceae).’ Atlas of Science 1.
- . . ‘Dense infraspecific sampling reveals rapid and independent trajectories of plastome degradation in a heterotrophic orchid complex.’ New Phytologist 218, Nr. 3: 1192–1204. doi: 10.1111/nph.15072.
- . . ‘Root responses to legume plants integrate information on nitrogen availability and neighbour identity.’ Basic and Applied Ecology 27: 51–60. doi: 10.1016/j.baae.2018.01.001.
- . . ‘Plastid genome evolution in the early-diverging legume subfamily Cercidoideae (Fabaceae).’ Frontiers in Plant Science 8: 138. doi: 10.3389/fpls.2018.00138.
- . . „Trap diversity and character evolution in carnivorous bladderworts (Utricularia, Lentibulariaceae).“ Scientific Reports 7: 12052. doi: 10.1038/s41598-017-12324-4.
- . . ‘Does functional soil microbial diversity contribute to explain within-site plant beta-diversity in an alpine grassland and a dehesa meadow in Spain?’ Journal of Vegetation Science 28: 1018–1027. doi: 10.1111/jvs.12557.
- . . ‘Biogeography of the Gondwanan tree fern family Dicksoniaceae—A tale of vicariance, dispersal and extinction.’ Journal of Biogeography 44, Nr. 11: 2648–2659. doi: 10.1111/jbi.13056.
- . . ‘LeafNet: A computer vision system for automatic plant species identification.’ Ecological Informatics 40: 50–56. doi: 10.1016/j.ecoinf.2017.05.005.
- . . ‘TraitRateProp: A web server for the detection of trait-dependent evolutionary rate shifts in sequence sites.’ Nucleic Acids Research 45, Nr. 1: W260–W264. doi: 10.1093/nar/gkx288.
- . . ‘An integrated model of phenotypic trait changes and site-specific sequence evolution.’ Systematic Biology 66, Nr. 6: 917–933. doi: 10.1093/sysbio/syx032.
- . . ‘Genus-wide screening reveals four distinct types of structural plastid genome organization in Pelargonium (Geraniaceae).’ Genome Biology and Evolution 9, Nr. 1: 64–76. doi: 10.1093/gbe/evw271.
- ‘How to tackle the molecular species inventory for an industrialized nation-lessons from the first phase of the German Barcode of Life initiative GBOL (2012-2015).’ Genome 59: 661–670. .
- . . ‘Mechanistic model of evolutionary rate variation en route to a nonphotosynthetic lifestyle in plants.’ Proceedings of the National Academy of Sciences of the United States of America 113, Nr. 32: 9045–9050. doi: 10.1073/pnas.1607576113.
- . . ‘Lineage-specific reductions of plastid genomes in an orchid tribe with partially and fully mycoheterotrophic species.’ Genome Biology and Evolution 8, Nr. 7: 2164–2175. doi: 10.1093/gbe/evw144.
- . . ‘Ellenberg's water table experiment put to the test: species optima along a hydrological gradient.’ Oecologia 181: 1163–1172. doi: 10.1007/s00442-016-3624-3.
- . . ‘Functional characterizations of Ellenberg Indicator Values - a review on ecophysiological determinants.’ Functional Ecology 30: 506–516. doi: 10.1111/1365-2435.12531.
- . . ‘Massive intracellular gene transfer during plastid genome reduction in nongreen Orobanchaceae.’ New Phytologist 210, Nr. 2: 680–693. doi: 10.1111/nph.13784.
- . . ‘Detection of orphan domains in Drosophila using "hydrophobic cluster analysis".’ Biochimie 119. doi: 10.1016/j.biochi.2015.02.019.
- . . ‘Sample data processing in an additive and reproducible taxonomic workflow by using character data persistently linked to preserved individual specimens.’ Database 2015: bav094. doi: 10.1093/database/bav094.
- . . ‘Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella.’ Plant Ecology 216: 887–899. doi: 10.1007/s11258-015-0476-6.
- . . ‘Establishment of Anthoceros agrestis as a model species for studying the biology of hornworts.’ BMC Plant Biology 15: 98. doi: 10.1186/s12870-015-0481-x.
- . . ‘Should I stay or should I go? Roots segregate in response to competition intensity.’ Plant and Soil 391: 283–291. doi: 10.1007/s11104-015-2419-3.
- . . ‘Increased Survival in the Red Flour Beetle after Oral Priming with Bacteria-Conditioned Media.’ Journal of Innate Immunity 6, Nr. 3: 306–314. doi: 10.1159/000355211.
- . . ‘Interspecific competition in Arabidopsis thaliana – a knowledge gap is starting to close.’ Progress in Botany 76: 303–319. doi: 10.1007/978-3-319-08807-5_12.
- . . ‘Evolution of genome size and chromosome number in the carnivorous plant genus Genlisea (Lentibulariaceae), with a new estimate of the minimum genome size in angiosperms.’ Annals of Botany 114, Nr. 8: 1651–1663. doi: 10.1093/aob/mcu189.
- . . ‘Disproportional plastome-wide increase of substitution rates and relaxed purifying selection in genes of carnivorous Lentibulariaceae.’ Molecular Biology and Evolution 31, Nr. 3: 529–545. doi: 10.1093/molbev/mst261.
- . . ‘Phylogenetics, character evolution and a subgeneric revision of the genus Pelargonium (Geraniaceae).’ Phytotaxa 159, Nr. 2: 31–76.
- . . ‘Mechanisms of functional and physical genome reduction in photosynthetic and nonphotosynthetic parasitic plants of the broomrape family.’ The Plant Cell 25: 3711–3725. doi: 10.1105/tpc.113.113373.
- . . ‘The phylogeny of Linderniaceae - The new genus Linderniella, and new combinations within Bonnaya, Craterostigma, Lindernia, Torenia and Vandellia.’ Willdenowia 43: 209–238. doi: 10.3372/wi.43.43201.
- . . ‘Population genetics and conservation of Sideroxylon canariense (Sapotaceae) on the Canary Islands.’ Vieraea 41: 295–308.
- . . ‘Effects of substrate type, moisture and its interaction on soil seed survival of three Rumex species.’ Plant and Soil 374: 485–495. doi: 10.1007/s11104-013-1903-x.
- . . ‘The response of grassland species to nitrate versus ammonium coincides with their pH optima.’ Journal of Vegetation Science 25: 760–770. doi: 10.1111/jvs.12124.
- . . ‘Belowground neighbor perception in Arabidopsis thaliana studied by transcriptome analysis: roots of Hieracium pilosella cause biotic stress.’ Frontiers in Plant Science 4: 296. doi: 10.3389/fpls.2013.00296.
- . . ‘Interspecific competition in Arabidopsis thaliana: root hairs are important for competitive effect, but not for competitive response.’ Plant and Soil 371: 167–177. doi: 10.1007/s11104-013-1675-3.
- . . ‘Common but new: Bartramia rosamrosiae, a 'new' widespread species of apple mosses (Bartramiales, Bryophytina) from the Mediterranean and western North America.’ Phytotaxa 73: 37–59.
- . . ‘Aluminium toxic effects on seedling root survival affect plant composition along soil reaction gradients – a case study in dry sandy grasslands.’ Journal of Vegetation Science 24: 1074–1085. doi: 10.1111/jvs.12016.
- . . ‘The new monotypic genus Bardotia (Orobanchaceae) from Madagascar and remarks on the phylogenetic relationships of the African and Madagascan genera Micrargeria, Parastriga, Radamaea, Rhamphicarpa and Sieversandreas.’ Phytotaxa 46: 19–33.
- . . ‘Phylogenetics of early branching eudicots: comparing phylogenetic signal accross chloroplast introns, spacers, and genes.’ Journal of Systematics and Evolution 50: 85–108. doi: 10.1111/j.1759-6831.2012.00181.x.
- . . ‘Chasing the hare - Evaluating the phylogenetic utility of a nuclear single copy gene region at and below species level.’ BMC Evolutionary Biology 11: 357. doi: 10.1186/1471-2148-11-357.
- . . ‘McPherson S. (ed. by Fleischmann A. and Robinson A.): Carnivorous plants and their habitats. (Book review).’ Willdenowia 42: 387–388.
- . . ‘Restless 5S: The re-arrangement(s) and evolution of the nuclear ribosomal DNA in land plants.’ Molecular Phylogenetics and Evolution 61, Nr. 2: 321–332. doi: 10.1016/j.ympev.2011.06.023.
- . . ‘What does it take to resolve relationships and to identify species with molecular markers? An example from the epiphytic Rhipsalideae (Cactaceae).’ American Journal of Botany 98, Nr. 9: 1549–1572. doi: 10.3732/ajb.1000502.
- . . ‘The evolution of the plastid chromosome in land plants: gene content, gene order, gene function.’ Plant Molecular Biology 76, Nr. 3-5: 273–297. doi: 10.1007/s11103-011-9762-4.
- . . ‘Towards resolving Lamiales relationships: insights from rapidly evolving chloroplast sequences.’ BMC Evolutionary Biology 10. doi: 10.1186/1471-2148-10-352.
- . . ‘Alignment of, and phylogenetic inference from, random sequences: the susceptibility of alternative methods to artifactual resolution and support.’ Molecular Phylogenetics and Evolution 57, Nr. 3: 1004–1016. doi: 10.1016/j.ympev.2010.09.004.
- . . ‘New insights in the evolution of the liverwort family Aneuraceae (Metzgeriales, Marchantiophyta), with emphasis on the genus Lobatiriccardia.’ Taxon 59, Nr. 5: 1424–1440.
- . . ‘Phylogenetics and character evolution in the carnivorous plant genus Genlisea A. St.-Hil. (Lentibulariaceae).’ Molecular Phylogenetics and Evolution 56, Nr. 2: 768–783. doi: 10.1016/j.ympev.2010.03.009.
- . . ‘The deterministic effects of alignment bias in phylogenetic inference.’ Cladistics 27, Nr. 4: 402–416. doi: 10.1111/j.1096-0031.2010.00333.x.
- . . ‘Phylogenetic inference using non-redundant coding of dependent characters vs. alternative approaches when applied to protein-coding genes.’ Cladistics 27, Nr. 2: 186–196. doi: 10.1111/j.1096-0031.2010.00327.x.
- . . ‘TreeGraph 2: combining and visualizing evidence from different phylogenetic analyses.’ BMC Bioinformatics 11: 7. doi: 10.1186/1471-2105-11-7.
- . . ‘Evolutionary rates in Veronica L. (Plantaginaceae): Disentangling the influence of life history and breeding system.’ Journal of Molecular Evolution 70, Nr. 1: 44–56. doi: 10.1007/s00239-009-9307-5.
- . . ‘Explaining hydrological niches: the decisive role of below-ground competition in two closely related Senecio species.’ Journal of Ecology 98: 126–136. doi: 10.1111/j.1365-2745.2009.01598.x.
- . . ‘Caryophyllales phylogenetics: disentangling Phytolaccaceae and Molluginaceae and description of Microteaceae as a new isolated family.’ Willdenowia 39: 209–228.
- . . ‘Universal primers for the amplification of the plastid trnK/matK region in land plants.’ Anales del Jardín Botánico de Madrid 66, Nr. 2: 285–288. doi: 10.3989/ajbm.2231.
- . . ‘The relative sensitivity of different alignment methods and character codings in sensitivity analysis.’ Cladistics 24, Nr. 6: 1039–1050. doi: 10.1111/j.1096-0031.2008.00230.x.
- . . ‘Pinguicula chuquisacensis (Lentibulariaceae), a new species from the Bolivian Andes, and first insights on phylogenetic relationships among South American Pinguicula.’ Willdenowia 38: 201–212.
- . . ‘Fifty mosses on five trees: Comparing phylogenetic information in three types of non-coding mitochondrial DNA and two chloroplast loci.’ Plant Systematics and Evolution 282: 241–255. doi: 10.1007/s00606-008-0043-x.
- . . ‘15N-nitrate-labelling demonstrates a size symmetric competitive effect on belowground resource uptake.’ Plant Ecology 199: 243–253. doi: 10.1007/s11258-008-9429-7.
- . . ‘PlantTribes: A gene and gene family resource for comparative genomics in plants.’ Nucleic Acids Research 36, Nr. IS 1: D970–D976. doi: 10.1093/nar/gkm972.
- . . ‘Analysis of 81 Genes from 64 Chloroplast Genomes Resolves Relationships in Angiosperms and Identifies Genome-Scale Evolutionary Patterns.’ Proceedings of the National Academy of Sciences of the United States of America 104, Nr. 49: 19369–19374. doi: 10.1073/pnas.0709121104.
- . . ‘Molecular evolutionary analysis of the Arabidopsis L7 ribosomal protein gene family.’ Gene 403: 143–150. doi: 10.1016/j.gene.2007.08.002.
- . . ‘The relative performance of indel-coding methods in simulations.’ Molecular Phylogenetics and Evolution 44: 724–740. doi: 10.1016/j.ympev.2007.04.001.
- . . ‘On the hyperbolic competition model – Reply.’ Journal of Ecology 95: 601–602. doi: 10.1111/j.1365-2745.2007.01260.x.
- . . ‘A penalty of using anonymous dominant markers (AFLPs, ISSRs, and RAPDs) for phylogenetic inference.’ Molecular Phylogenetics and Evolution 42: 528–542. doi: 10.1016/j.ympev.2006.08.008.
- . . ‘Identifying mechanisms of competition in multi-species communities.’ Journal of Ecology 95: 53–64. doi: 10.1111/j.1365-2745.2006.01198.x.
- . . ‘Recent progress in understanding the evolution of Lentibulariaceae.’ Plant Biology 8: 748–757. doi: 10.1055/s-2006-924706.
- . . ‘Smallest angiosperm genomes found in Lentibulariaceae, with chromosomes of bacterial size.’ Plant Biology 8: 770–777. doi: 10.1055/s-2006-924101.
- . . ‘Phylogenetic utility of rapidly evolving DNA at high taxonomical levels: contrasting matK, trnT-F and rbcL in basal angiosperms.’ Molecular Phylogenetics and Evolution 41, Nr. 1: 99–117. doi: 10.1016/j.ympev.2006.06.017.
- . . ‘Incorporating information from length-mutational events into phylogenetic analysis.’ Molecular Phylogenetics and Evolution 38, Nr. 3: 667. doi: 10.1016/j.ympev.2005.07.011.
- . . ‘Multiple origins of a unique pollen feature: stellate pore ornamentation in Amaranthaceae.’ Grana 44: 266–281. doi: 10.1080/00173130500477787.
- . . ‘The efficiency of different search strategies in estimating parsimony jackknife, bootstrap, and Bremer support.’ BMC Evolutionary Biology 5: 58. doi: 10.1186/1471-2148-5-58.
- . . ‘Phylogenetic Analysis of Pinguicula (Lentibulariaceae): Chloroplast DNA Sequences and Morphology Support Several Geographically Distinct Radiations.’ American Journal of Botany 92: 1723–1736. doi: 10.3732/ajb.92.10.1723.
- . . ‘Aggregative root placement: a feature during interspecific competition in inland sand-dune habitats.’ Plant and Soil 280: 101–114. doi: 10.1007/s11104-005-2612-x.
- . . ‘Towards Understanding Basal Angiosperm Diversification: Recent Insights Using Rapidly Evolving Genomic Regions.’ Nova Acta Leopoldina 92 342: 85–110.
- . . ‘Phylogenetics of Amaranthaceae based on matK/trnK sequence data - evidence from parsimony, likelihood, and Bayesian analyses.’ Annals of the Missouri Botanical Garden 92, Nr. 1: 66–102.
- . . ‘SeqState - primer design and sequence statistics for phylogenetic DNA data sets.’ Applied Bioinformatics 4: 66–69.
- . . ‘The Linderniaceae and Gratiolaceae (Lamiales) are further lineages distinct from Scrophulariaceae.’ Plant Biology 7, Nr. 1: 67–78. doi: 10.1055/s-2004-830444.
- . . ‘Phylogenetics of Utricularia (Lentibulariaceae) and molecular evolution of the trnK intron in a lineage with high substitutional rates.’ Plant Systematics and Evolution 250: 39–67. doi: 10.1007/s00606-004-0224-1.
- . . ‘Phylogeny of Aristolochiaceae based on parsimony, likelihood, and Bayesian analyses of trnL-trnF sequences.’ Plant Systematics and Evolution 250: 7–26. doi: 10.1007/s00606-004-0217-0.
- . . ‘TreeGraph: automated drawing of complex tree figures using an extensible tree description format.’ Molecular Ecology Notes 4: 186–788. doi: 10.1111/j.1471-8286.2004.00813.x.
- . . ‘Evolution of carnivory in Lentibulariaceae and the Lamiales.’ Plant Biology 6: 477–490. doi: 10.1055/s-2004-817909.
- . . ‘PRAP - computation of Bremer support for large data sets.’ Molecular Phylogenetics and Evolution 31, Nr. 2: 780–782. doi: 10.1016/j.ympev.2003.12.006.
- . . ‘Angiosperm phylogeny based on matK sequence information.’ American Journal of Botany 90: 1758–1776. doi: 10.3732/ajb.90.12.1758.
- . . ‘Characterisation of the chloroplast DNA psbT-H region and the influence of dyad symmetrical elements on phylogenetic reconstructions.’ Plant Biology 5: 400–410. doi: 10.1055/s-2003-42715.
- . . ‘QuickAlign: A New Alignment Editor.’ Plant Molecular Biology Reporter 21: 1–5. doi: 10.1007/BF02773390.
- . . ‘Evolution of carnivory in the Lentibulariaceae: considerations based on molecular, morphological, and physiological evidence.’ Proceedings of the 4th International Carnivorous Plant Conference, Tokyo, Japan 2002 : 63–73.
- . . ‘The taxonomic status of Eurhynchium crassinervium from river banks based on ITS sequence data.’ Journal of Bryology 22: 291–306.
Forschungsartikel (Buchbeiträge)
- . . ‘Magnoliopsida (Angiosperms) p.p. Subclass Rosidae p.p. (Trochodendranae to Saxifraganae).’ In Syllabus of Plant Families - Part 5/1, edited by , 215–255. Stuttgart: Borntraeger.
- . . ‘Magnoliopsida (Angiosperms) p.p. Subclass Rosidae p.p. (Rosanae to Berberidopsidanae).’ In Syllabus of Plant Families - Part 5/1, edited by , 255–615. Stuttgart: Borntraeger.
- . . ‘Image-Based Identification of Plant Species Using a Model-Free Approach and Active Learning.’ In KI 2016: Advances in Artificial Intelligence, edited by , 169–176. Basel : Springer International Publishing. doi: 10.1007/978-3-319-46073-4_16.
- . . ‘Next generation organellar genomics: Potentials and pitfalls of high-throughput technologies for molecular evolutionary studies and plant systematics.’ In Next generation sequencing in plant systematics, edited by , Chapter 1. Oberreifenberg / Koenigstein: Koeltz. doi: 10.14630/000002.
- . . ‘Genomic evolution in Orobanchaceae.’ In Parasitic Orobanchaceae - Parasitic Mechanisms and Control Strategies , edited by , 267–286. Düsseldorf: Springer VDI Verlag. doi: 10.1007/978-3-642-38146-1_15.
- . . ‘Seed Ecology and Assembly Rules in Plant Communities .’ In Vegetation Ecology, edited by , 164–202. 2. Aufl. New York City: John Wiley & Sons. doi: 10.1002/9781118452592.ch6.
- . . ‘Biodiversität und Evolution.’ In Perspektiven - Forschungsfragen der Zukunft, edited by , 1–10. 1. Aufl. Paderborn: Ferdinand Schöningh.
- . . ‘Molecular evolution of the chloroplast trnL-F region in land plants.’ In Molecular Systematics of Bryophytes, edited by , 13–37. St. Louis: Missouri Botanical Garden Press.
- . . ‘The phylogeny and evolution of epiphytism in three moss families Meteoriaceae, Brachytheciaceae, and Lembophyllaceae.’ In Molecular Systematics of Bryophytes, edited by , 328–364. St. Louis: Missouri Botanical Garden Press.
Nicht-wissenschaftliche Beiträge (Zeitschriften)
- . . „Pflanzliche Gipfelstürmer - Bedroht der Klimawandel die alpine Flora?“ Unterricht Biologie 495: 32–38.
- „Licht und Schatten. Mathematisieren im Biologieunterricht im Kontext einer ökologischen Freilandübung.“ Der mathematisch-naturwissenschaftliche Unterricht 72, Nr. 03: 222–228. .
Fachbücher (Monografien)
- . . Gene und Stammbäume: Ein Handbuch zur molekularen Phylogenetik. 2. Aufl. Heidelberg: Spektrum Akademischer Verlag.
- . . Gene und Stammbäume. Ein Handbuch zur molekularen Phylogenetik. 1. Aufl. Heidelberg: Spektrum Akademischer Verlag.
Qualifikationsschriften (Dissertationen, Habilitationsschriften)
- . . Software components for increased data reuse and reproducibility in phylogenetics and phylogenomics Dissertationsschrift, WWU Münster. Münster.
- . . Ecophysiology of root interactions and plant niche differentiation Habilitationsschrift, University of Regensburg.
- . . Evolution of Amaranthaceae - A case study integrating molecular phylogenetics and pollen data Dissertationsschrift, Rheinische Friedrich-Wilhems-Universität Bonn. Bonn.
- . . Pflanzliche Interaktionen in ressourcenarmen Sandökosystemen: Die Bedeutung funktioneller und morphologischer Wurzelparameter für die unterirdische Konkurrenzfähigkeit Dissertationsschrift, University of Bielefeld.