[1
]Greifswald Mire Centre, Institute of Botany and Landscape Ecology; Ernst Moritz Arndt
University; Greifswald Germany
[2
]Centre for Earth System Research and Sustainability; Institute of Soil Sciences, Universität
Hamburg; Hamburg Germany
[3
]Department of Soil Science; Moscow State University; Moscow Russia
[4
]State Museum of Natural History Karlsruhe; Karlsruhe Germany
[5
]Institute of Geography and Geology; Ernst Moritz Arndt University; Greifswald Germany