TY - CHAP A1 - Lippert, Gudrun A1 - Nixdorf, Brigitte A1 - Leßmann, Dieter A1 - Henschke, Ingo A1 - Veste, Maik A1 - Böhme, Michael T1 - Primärsukzession einem Kleingewässer (Hühnerwasserteich) - Teil 2: Vergleich der Produktion von Phytoplankton, Makrophyten und heterotrophen Bakterien T2 - Erweiterte Zusammenfassung der Jahrestagung der DGL 2009 in Oldenburg KW - Primärsukzession KW - Phytoplankton Y1 - 2010 SN - 978-3-9802188-8-7 SP - 84 EP - 89 PB - Eigenverlag der DGL CY - Hardegsen ER - TY - GEN A1 - Zaplata, Markus K. A1 - Schümberg, Sabine A1 - Kidron, Giora J. A1 - Ramm, Jessica A1 - Veste, Maik T1 - Impacts of cyanobacteria-dominated biological soil crusts on seedling emergence and fate: an in situ experiment T2 - Pant and Soil : an International Journal on Plant-Soil Relationships N2 - Background and aims Biological soil crusts (BSCs) co-occur with vascular plants in many ecosystems. Nevertheless, little is known regarding the interaction among BSCs and vascular plants, and no standard methods exist aiming to evaluate BSC–plant interactions. While some reports emphasized the inhibition effect of BSCs on germination, others reported the opposite or did not find any differences between germination under crusted and non-crusted conditions. Contradictory findings were also reported regarding the BSC effects on vascular plants after germination, with some reports claiming that BSCs promote growth, while others claim the opposite. Methods By a seed addition experiment (using light and heavy seeds of three species belonging to the Fabaceae family) in an early-successional system in Germany, we tested in situ the emergence of seedlings under variable surface conditions (cyanobacterial crust, disturbed and removed crust), and quantified crust-plant interactions (survival, flowering) during and following seedling emergence. Results In comparison to an average of 8% of the light Lotus corniculatus and 20% of the light Ornithopus sativus that emerged through the cyanobacterial BSC, 76% of the heavy Glycine max emerged. Once emerged, the crust did not significantly affect the survival, growth, biomass, or flowering of G. max, whereas many of the seedlings from lightweight seeds dried up soon after emergence. The thickness of the cyanobacterial biocrust had no influence on Fabaceae emergence. Conclusion The cyanobacterial BSC acted as a filter that hindered the emergence of the lightweight seeds. KW - Biocrusts KW - Biological soil crusts KW - soil ecology KW - post-mining site Y1 - 2024 U6 - https://doi.org/10.1007/s11104-024-06869-3 ER - TY - GEN A1 - Schaaf, Wolfgang A1 - Bens, Oliver A1 - Fischer, Anton A1 - Gerke, Horst H. A1 - Gerwin, Werner A1 - Grünewald, Uwe A1 - Holländer, Hartmut M. A1 - Kögel-Knabner, Ingrid A1 - Mutz, Michael A1 - Schloter, Michael A1 - Schulin, Rainer A1 - Veste, Maik A1 - Winter, Susanne A1 - Hüttl, Reinhard F. T1 - Patterns and processes of initial terrestrial-ecosystem development T2 - Journal of Plant Nutrition and Soil Science N2 - Ecosystems are characterized as complex systems with abiotic and biotic processes interacting between the various components that have evolved over long-term periods. Most ecosystem studies so far have been carried out in mature systems. Only limited knowledge exists on the very initial phase of ecosystem development. Concepts on the development of ecosystems are often based on assumptions and extrapolations with respect to structure–process interactions in the initial stage. To characterize the effect of this initial phase on structure and functioning of ecosystems in later stages, it is necessary to disentangle the close interaction of spatial and temporal patterns of ecosystem structural assemblages with processes of ecosystem development. The study of initial, less complex systems could help to better identify and characterize coupled patterns and processes. This paper gives an overview of concepts for the initial development of different ecosystem compartments and identifies open questions and research gaps. The artificial catchment site “Chicken Creek” is introduced as a new research approach to investigate these patterns and processes of initial ecosystem development under defined boundary conditions. This approach allows to integrate the relevant processes with related pattern and structure development over temporal and spatial scales and to derive thresholds and stages in state and functioning of ecosystems at the catchment level. KW - soils KW - pedogenesis KW - vegetation succession KW - microbial succession KW - artificial catchment Y1 - 2011 U6 - https://doi.org/10.1002/jpln.201000158 SN - 1522-2624 VL - 174 IS - 2 SP - 229 EP - 239 ER -