Impact of management on vegetation dynamics and seed bank formation of inland dune grassland in Hungary |
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| Affiliation: | 1. Department of Botany, Faculty of Science, University of Debrecen, P.O. Box 14, Debrecen H-4010, Hungary;2. Department of Ecology, Faculty of Science, University of Debrecen, P.O. Box 71, Debrecen H-4010, Hungary;1. Room 408, BeiHang Training Centre, BUAA, 37, Road Xueyuan, Beijing 100191, China;2. Distribution Centre, Golmud Mansion, 33, Road Yingbin, Golmud 816000, China;3. Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;4. National Laboratory for Computational Fluid Dynamics, BUAA, Beijing 100191, China;1. Università degli Studi di Palermo, Dipartimento Scienze Agrarie e Forestali, Italy;2. Università degli Studi di Palermo, Dipartimento STEBICEF, Sezione Botanica, Italy;3. Zürcher Hochschule für Angewandte Wissenschaften (ZHAW), Institut für Umwelt und Natürliche Ressourcen (IUNR), Switzerland;4. Department of Botany and Zoology, Masaryk University, Czech Republic;1. Poznań University of Life Sciences, Institute of Zoology, Wojska Polskiego 71C, Poznań 60-625, Poland;2. Department of Plant Ecology and Environmental Protection, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland;3. Department of Forest Botany, Poznań University of Life Sciences, Wojska Polskiego 71D, Poznań 60-625, Poland;4. Faculty of Biological Sciences, University of Zielona Góra, Prof. Szafrana 1, 65-516 Zielona Góra, Poland;1. Plant Protection Group, Department of Environmental Protection, Estación Experimental del Zaidín (CSIC), C/Profesor Albareda 1, 18008 Granada, Spain;2. Department of Zoology, University of Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain;3. Semillas Silvestres S.L., C/Aulaga n° 24, 10012 Córdoba, Spain;1. Albert Katz International School for Desert Studies, Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel;2. Mitrani Department of Desert Ecology, Swiss Institute for Dryland Environmental and Energy Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel;3. Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel;4. Department of Environmental Sciences, Tel-Hai College, Israel;5. Royal Botanic Gardens Kew, Wellcome Trust Millennium Building, Wakehurst, West Sussex, United Kingdom |
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| Abstract: | Seed bank formation and 7 years of vegetation dynamics were studied on permanent plots of a dry sandy pasture, Cynodonti-Festucetum pseudovinae. A stand overgrazed by domestic geese and a reference stand void of overgrazing were compared. Apart from this both stands were accidentally grazed by cattle. Vegetation of the overgrazed stand was significantly more species-rich, especially in summer annuals. The reference was dominated with perennials and winter annuals. Composition and dominance changed considerably at both stands but only composition became more alike. Declining species richness and increasing dominance of perennials was found in the overgrazed stand. The reference stand became dominated with the dwarf-shrub Thymus degenianus. Species richness of the overgrazed stand showed greater seasonal and year-to-year variation than that of the reference. No temporal change of nutrient availability was found and neither was a difference detected between the stands.Greenhouse germination revealed more dense and more species-rich seed bank in the overgrazed stand. Its established vegetation and soil seed bank were also more alike. Higher species richness of the overgrazed stand can be associated with intensive propagule dispersal of geese, as indicated by dense seed banks of zoochorous hygrophytes delivered from neighbouring wetlands. Relatively high representation of persistent seed bank records suggests that, except for some sensitive perennials, the studied community is adapted to recurrent disturbances. Community regeneration seems to be limited by slow spread of perennial graminoids. |
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