Research Interests

• Biodiversity and nature conservation of grassland ecosystems
• Floodplain ecology
• Nature conservation management

Services, Memberships

Memberships in scientific organisations

• European Dry Grassland Group (EDGG)
• International Association of Vegetation Science (IAVS)
• Hessische Vereinigung für Naturschutz und Landschaftspflege e. V. (HVNL)

Publications

International publications (peer-reviewed)

2019

• Palpurina S, Chytrı M, Hölzel N, Tichý L, Wagner V, Horsák M, Axmanová I, Hajek M, Hájková P, Freitag M, Lososová Z, Mathar W, Tzonev R, Danihelka J, Dřevojan P (2019) The type of nutrient limitation affects the plant species richness–productivity relationship: evidence from dry grasslands across Eurasia. Journal of Ecology 107: 1038–1050 [doi: 10.1111/1365-2745.13084]

2016

• Kämpf I, Mathar W, Kuzmin I, Hölzel N, Kiehl K (2016) Post-Soviet Recovery of grassland vegetation on abandoned fields in the forest steppe zone of Western Siberia. Biodiversity and Conservation 25 (12): 2563-2580 [doi:10.​1007/​s10531-016-1078-x]
• Mathar W, Kämpf I, Kleinebecker T, Kuzmin I, Tolstikov A, Tupitsin S, Hölzel N (2016) Floristic diversity of meadow steppes in the Western Siberian Plain: effects of abiotic site conditions, management and landscape structure. Biodiversity & Conservation 25 (12): 2361–2379 [doi:10.1007/s10531-015-1023-4] - Special Issue
• Weking S, Kämpf I, Mathar W, Hölzel N (2016) Effects of land use and landscape patterns on Orthoptera communities in the Western Siberian forest steppe. Biodiversity and Conservation 25 (12): 2341-2359 [doi:10.​1007/​s10531-016-1107-9]

2015

• Freitag M, Mathar W, Yurtaev AA, Hölzel N (2015) Floristic composition and environmental determinants of pine forests in the hemiboreal zone of Western Siberia. Tuexenia 35: 31-51 [doi:10.14471/2015.35.017]
• Mathar, W., Kleinebecker, T., Hölzel, N. (2015) Environmental variation as a key process of co-existence in flood-meadows. Journal of Vegetation Science, 26: 480–491  [doi:10.1111/jvs.12254]

Conference Presentations

• Hölzel N, Kämpf I, Mathar W, Tupitsin S, Wertebach, T.-M, Yurtaev A,  Kamp J, Kiehl K, Abramov NV, Tolstikov AV (2014): Impact of Land  Cover and Land-use Intensity on Soil Organic Carbon Stocks in the South of the Tyumen Province. 5. International Conference „Environment and Natural Resource Managment“, Tyumen State University, 01-03/10/2014, Tjumen, Russische Förderation.
• Mathar W, Gottbehüt K, Kamp J, Kämpf I, Weking S, Hölzel N (2014) Environmental and land-use effects on diversity and composition of grasslands within the Forest-Steppe zone of Western Siberia. Talk. 11th European Dry Grassland Meeting, Tula, Russland, 5-15/06/2014 - awarded "2nd best talk award for young scientists"
• Mathar W, Gottbehüt K, Hölzel N, Kamp J, Kämpf I, Kiehl K, Tolstikov A, Tupizin S, Weking S, Wertebach T (2013) The Western Siberian forest steppe as a hotspot of biodiversity and carbon sequestration. Talk at the Status Conference 2013 of the BMBF-Research Programme “Sustainable Land Management“, Berlin, Germany, 17-19/04/2013
• Mathar W, Kleinebecker T & Hölzel N (2009) Effects of a severe summer flood in 1999 on the vegetation of alluvial meadows at the Upper Rhine. Poster. Conference of the Ecological Society of Germany, Austria and Switzerland, Bayreuth.

Theses

• Mathar W (2009) Long-term vegetation dynamics in flood-meadows. Diploma thesis, Institute of Landscape Ecology, University of Münster
• Mathar W (2007) Spatial pattern of epiphytes confined to Salix caprea in a natural patchy landscape. D-Uppsats, Mittuniversitetet, Sundsvall, Schweden