@incollection{BensFelixHenningsen, author = {Bens, Oliver and Felix-Henningsen, Peter}, title = {Variability of litter decomposition and nitrogen turnover in different Scots pine (Pinus sylvestris) ecosystems in Northwest Germany under the influence of groundwater lowering}, language = {en} } @misc{OuldBabaPethHornetal., author = {Ould Baba, Hamoudy and Peth, Stephan and Horn, Rainer and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Quantification of mechanical strength and sliding stability of an artificial water catchment (Chicken Creek)}, series = {Soil \& Tillage Research}, volume = {146}, journal = {Soil \& Tillage Research}, issn = {0167-1987}, doi = {10.1016/j.still.2014.05.013}, pages = {66 -- 78}, abstract = {Natural shear forces due to gravity along inclined terrain surfaces are controlled by the inclination of the terrain, material composition and its mechanical properties, stratification and hydraulic stress states. Both shear forces and shear strength under a given inclination of the terrain surface strongly depend on the interaction between mechanical and hydraulic stresses. These internal conditions as well as the interactions between these various components are fundamentals in all nonplanar regions under arable, forest or grassland management and they dominate also under various geoscientific aims. Generally, soil creep is a slow soil movement downslope under gravity. It can occur even on gentle slopes when the shear forces exceed the shear strength of the soil. Deposited material on slopes is more sensitive to such movements than well-developed soils due to the absence of a pronounced soil structure, site and management dependent hydraulic properties and functions, which results in low soil strength. We applied the described measurements and the modelling approaches to investigate and to analyse the stability of an artificially constructed water catchment (Chicken Creek) in the mining district of Cottbus/Germany, where glacial sand was deposited above a clay layer with an inclination of about 3.5\%. At the lower part of the catchment, an impermeable barrier (claywall)was positioned transversally to the main slope. Mechanical and hydraulic parameters of the soil layers were determined on soil samples taken from the field site. The measured values were inserted as input parameters for the finite element model (Plaxis 2D) to simulate soil movements and their effect on the stability of the catchment. The obtained results showed that the kind of construction negatively affected the physical low soil strength (low precompression stress) although the bulk density was very high (1.7-1.9 g/cm3 for the sandy material). Hydraulic conductivity revealed a significant anisotropy with higher hydraulic conductivity values in the horizontal direction. Furthermore, finite element results showed that the design of the newly formed landscape remains weak concerning mass movements too. The high water table in the sandy material in conjunction with low soil strength enhances the downslope movement and increases the shear stress near the clay wall at the lower end of the slope, which finally results in soil creep processes. These results also proof that such geotechnical and modelling approach is also suitable to validate or to predict mass movements and the internal processes responsible for these internal mass erosion.}, language = {en} } @misc{PlieningerBensHuettl, author = {Plieninger, Tobias and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Perspective of bioenergy for agriculture and rural areas}, series = {Outlook on Agriculture}, volume = {35}, journal = {Outlook on Agriculture}, number = {2}, issn = {0030-7270}, doi = {10.5367/000000006777641624}, pages = {123 -- 127}, language = {en} } @misc{BensBuczkoSieberetal., author = {Bens, Oliver and Buczko, Uwe and Sieber, Sonja and H{\"u}ttl, Reinhard F.}, title = {Spatial variability of O layer thickness and humus forms under different pine beech-forest transformation stages in NE Germany}, series = {Journal of Plant Nutrition and Soil Science}, volume = {169}, journal = {Journal of Plant Nutrition and Soil Science}, number = {1}, issn = {1522-2624}, doi = {10.1002/jpln.200521734}, pages = {5 -- 15}, language = {en} } @misc{BuczkoBensHuettl, author = {Buczko, Uwe and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Water infiltration and hydrophobicity in forest soils of a pine-beech transformation chronosequence}, series = {Journal of Hydrology}, volume = {331}, journal = {Journal of Hydrology}, number = {3-4}, doi = {10.1016/j.jhydrol.2006.05.023}, pages = {383 -- 395}, language = {en} } @misc{BuczkoBens, author = {Buczko, Uwe and Bens, Oliver}, title = {Assessing soil hydrophobicity and its variability through the soil profile using two different methods}, series = {Soil Science Society of America Journal}, volume = {70}, journal = {Soil Science Society of America Journal}, number = {3}, issn = {1435-0661}, doi = {10.2136/sssaj2005.0183}, pages = {718 -- 727}, language = {en} } @misc{GruenewaldBrandtSchneideretal., author = {Gr{\"u}newald, Holger and Brandt, Barbara K. V. and Schneider, Bernd Uwe and Bens, Oliver and Kendzia, Gerald and H{\"u}ttl, Reinhard F.}, title = {Agroforestry systems for the production of woody biomass for energy transformation purposes}, series = {Ecological Engineering}, volume = {29}, journal = {Ecological Engineering}, number = {4}, issn = {0925-8574}, doi = {10.1016/j.ecoleng.2006.09.012}, pages = {319 -- 328}, language = {en} } @misc{BensWahlFischeretal., author = {Bens, Oliver and Wahl, Niels Arne and Fischer, Holger and H{\"u}ttl, Reinhard F.}, title = {Water infiltration and hydraulic conductivity in sandy cambisols: impacts of forest transformation on soil hydrological properties}, series = {European Journal of Forest Research}, volume = {126}, journal = {European Journal of Forest Research}, number = {1}, issn = {1612-4677}, doi = {10.1007/s10342-006-0133-7}, pages = {101 -- 109}, language = {en} } @misc{BuczkoBensHuettl, author = {Buczko, Uwe and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Changes in soil water repellency in a pine-beech forest transformation chronosequence: Influence of antecedent rainfall and air temperature}, series = {Ecological Engineering}, volume = {31}, journal = {Ecological Engineering}, number = {3}, issn = {0925-8574}, doi = {10.1016/j.ecoleng.2007.03.006}, pages = {197 -- 204}, language = {en} } @misc{PlieningerBensHuettl, author = {Plieninger, Tobias and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Introduction}, series = {Outlook on Agriculture}, volume = {35}, journal = {Outlook on Agriculture}, number = {2}, doi = {10.5367/000000006777641552}, pages = {95 -- 96}, language = {en} } @misc{PlieningerBens, author = {Plieninger, Tobias and Bens, Oliver}, title = {How the emergence of biofuels challenges conservation}, series = {Environmental Conservation}, volume = {34}, journal = {Environmental Conservation}, number = {4}, issn = {1469-4387}, doi = {10.1017/S0376892907004328}, pages = {273 -- 275}, language = {en} } @misc{PrechtelLuetzowSchneideretal., author = {Prechtel, Annette and L{\"u}tzow, Margit von and Schneider, Bernd Uwe and Bens, Oliver and Bannick, Claus G. and K{\"o}gel-Knabner, Ingrid and H{\"u}ttl, Reinhard F.}, title = {Organic carbon in soils of Germany: Status quo and the need for new data to evaluate potentials and trends of soil carbon sequestration}, series = {Journal of Plant Nutrition and Soil Science}, volume = {172}, journal = {Journal of Plant Nutrition and Soil Science}, number = {5}, issn = {1522-2624}, doi = {10.1002/jpln.200900034}, pages = {601 -- 614}, language = {en} } @misc{LemmnitzKuhnertBensetal., author = {Lemmnitz, Christine and Kuhnert, Matthias and Bens, Oliver and G{\"u}nter, A. and Merz, Bruno and H{\"u}ttl, Reinhard F.}, title = {Spatial and temporal variations of actual soil water repellency and their influence on surface runoff}, series = {Hydrological Processes}, volume = {22}, journal = {Hydrological Processes}, number = {12}, issn = {1099-1085}, doi = {10.1002/hyp.6782}, pages = {1976 -- 1984}, language = {en} } @misc{PlieningerThielBensetal., author = {Plieninger, Tobias and Thiel, Andreas and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Pathways and pitfalls of implementing the use of woodfuels in Germanys bioenergy sector}, series = {Biomass and Bioenergy}, volume = {33}, journal = {Biomass and Bioenergy}, number = {3}, issn = {0961-9534}, doi = {10.1016/j.biombioe.2008.08.013}, pages = {384 -- 392}, language = {en} } @misc{PlieningerBeetzBensetal., author = {Plieninger, Tobias and Beetz, Stephan and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Land use innovations in North-East Germany - A case study of the bioenergy sector}, series = {GAiA - Ecological Perspectives in Science Humanities and Economics}, volume = {18}, journal = {GAiA - Ecological Perspectives in Science Humanities and Economics}, number = {2}, pages = {136 -- 144}, language = {en} } @misc{FischerVesteEiseleetal., author = {Fischer, Thomas and Veste, Maik and Eisele, Andreas and Bens, Oliver and Spyra, Wolfgang and H{\"u}ttl, Reinhard F.}, title = {Small Scale Spatial Heterogeneity of Normalized Difference Vegetation Indices (NDVI) and Hot Spots of Photosynthesis in Biological Soil Crusts}, series = {Flora}, volume = {207}, journal = {Flora}, number = {3}, doi = {10.1016/j.flora.2012.01.001}, pages = {159 -- 167}, abstract = {Normalized Difference Vegetation Indices (NDVIs) are typically determined using satellite or airborne remote sensing, or field portable spectrometers, which give an averaged signal on centimetre to metre scale plots. Biological soil crust (BSC) patches may have smaller sizes, and ecophysiological, hydrological as well as pedological processes may be heterogeneously distributed within this level of resolution. A ground-based NDVI imaging procedure using low-cost equipment (Olympus Camedia 5000z digital camera equipped with a Hoya R72 infrared filter) was developed in this study to fill this gap at the level of field research, where carrying costly and bulky equipment to remote locations is often the limiting factor for data collection. Method principle and field data are presented, and the field experiment was deepened comparing NDVI measurements and CO2 turnover of soil crust samples in the laboratory, backing the reliability of the approach. A commercially available colour rendition chart with known red (600-700 nm) and NIR (800-900 nm) reflectances was placed into each scene and used for calibration purposes on a per-image basis. Generation of NDVI images involved (i) determination of red and NIR reflectances from the pixel values of the red and NIR channels, respectively, and (ii) calculation and imaging of the NDVI, where NDVI values of -1 to +1 were mapped to grey values of 0 to 255. The correlation between NDVI values retrieved from these images and NDVI values determined using field spectrometry was close (r2 = 0.91), the 95\% confidence interval amounted to 0.10 NDVI units. The pixel resolution was 0.8 mm in the field and 0.2 mm in the laboratory, but can still be improved significantly with closer distance to the crust or with higher camera resolution. NDVI values obtained using the new method were related to the net CO2 uptake of BSCs, where both slope and correlation coefficient of the respective regression function conformed with literature data. Geostatistical analysis revealed that both spatial variability of net CO2 uptake as well as size of individual hot spots of this parameter increased with crust development. The latter never exceeded 4 mm in the investigated crusts, which points to the necessity of high resolution imaging for linking remote sensing with ecophysiology. Perspectively, the new method could be used for field monitoring of both biological soil crusts and vascular vegetation.}, language = {en} } @misc{FischerVesteSchaafetal., author = {Fischer, Thomas and Veste, Maik and Schaaf, Wolfgang and D{\"u}mig, Alexander and K{\"o}gel-Knabner, Ingrid and Wiehe, Wolfgang and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Initial pedogenesis in a topsoil crust 3 years after construction of an artificial water catchment in Brandenburg, NE Germany}, series = {Biogeochemistry}, volume = {101}, journal = {Biogeochemistry}, number = {1-3}, issn = {1573-515X}, doi = {10.1007/s10533-010-9464-z}, pages = {165 -- 176}, abstract = {Cyanobacteria and green algae present in biological soil crusts are able to colonize mineral substrates even under extreme environmental conditions. As pioneer organisms, they play a key role during the first phases of habitat colonization. A characteristic crust was sampled 3 years after installation of the artificial water catchment "Chicken creek", thus representing an early successional stage of ecosystem development. Mean annual rainfall and temperature were 559 mm and 9.3°C, respectively. We combined scanning electron microscopy (SEM/EDX) and infrared (FTIR) microscopy to study the contact zone of algal and cyanobacterial mucilage with soil minerals in an undisturbed biological soil crust and in the subjacent sandy substrate. The crust was characterized by an approximately 50 μm thick surface layer, where microorganisms resided and where mineral deposition was trapped, and by an approximately 2.5 mm thick lower crust where mineral particles were stabilized by organo-mineral structures. SEM/EDX microscopy was used to determine the spatial distribution of elements, organic compounds and minerals were identified using FTIR microscopy and X-ray diffraction (XRD). The concentration of organic carbon in the crust was about twice as much as in the parent material. Depletion of Fe, Al and Mn in the lower crust and in the subjacent 5 mm compared to the geological substrate was observed. This could be interpreted as the initial phase of podzolization. Existence of bridging structures between mineral particles of the lower crust, containing phyllosilicates, Fe compounds and organic matter (OM), may indicate the formation of organo-mineral associations. pH decreased from 8.1 in the original substrate to 5.1 on the crust surface 3 years after construction, pointing to rapid weathering of carbonates. Weathering of silicates could not be detected.}, language = {en} } @misc{ElmerGerwinSchaafetal., author = {Elmer, Michael and Gerwin, Werner and Schaaf, Wolfgang and Zaplata, Markus K. and Hohberg, Karin and Nenov, Rossen and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Dynamics of initial ecosystem development at the artificial catchment Chicken Creek, Lusatia, Germany}, series = {Environmental Earth Sciences}, volume = {69}, journal = {Environmental Earth Sciences}, number = {2}, issn = {1866-6299}, pages = {491 -- 505}, language = {en} } @misc{LuckeSchmidtAlSaadetal., author = {Lucke, Bernhard and Schmidt, Michael and Al-Saad, Ziad and H{\"u}ttl, Reinhard F. and Bens, Oliver}, title = {The abandonment of the Decapolis region in Northern Jordan - forced by environmental change?}, series = {Quaternary International}, volume = {135}, journal = {Quaternary International}, number = {1}, issn = {1040-6182}, pages = {65 -- 81}, language = {en} } @book{GerwinSchillemAschetal., author = {Gerwin, Werner and Schillem, Steffi and Asch, Folkard and Bens, Oliver and Bestajovsky, J{\"u}rgen and Bruns, Christian and Gattinger, Andreas and Hattig, Tom and Hoogen, Heiner and H{\"u}ttl, Reinhard F. and Raab, Thomas and Rodionov, Andrei and Schaaf, Wolfgang and Schneider, Bernd Uwe and Trimborn, Manfred}, title = {Bodenmelioration und Anbauverfahren f{\"u}r trockenheitsgef{\"a}hrdete Standorte (BAtroS)}, editor = {H{\"u}ttl, Reinhard F. and Gerwin, Werner}, publisher = {FZLB}, address = {Cottbus}, isbn = {978-3-937728-14-8}, pages = {120}, language = {de} } @inproceedings{SchaafGerkeBens, author = {Schaaf, Wolfgang and Gerke, Horst H. and Bens, Oliver}, title = {Characteristics of disturbance in terrestrial post-mining ecosystems}, language = {en} } @incollection{AschBensBestajovskyetal., author = {Asch, Folkard and Bens, Oliver and Bestajovsky, J{\"u}rgen and Gattinger, Andreas and Gerwin, Werner and Hattig, Tom and Hoogen, Verena and H{\"u}ttl, Reinhard F. and Rodionov, Andrei and Schaaf, Wolfgang and Schneider, Bernd Uwe and Trimborn, Manfred and Schillem, Steffi}, title = {Bodenmelioration und Anbauverfahren f{\"u}r trockenheitsgef{\"a}hrdete Standorte}, series = {Klimaschutz und Anpassung an die Klimafolgen : Strategien, Maßnahmen und Anwendungsbeispiele}, booktitle = {Klimaschutz und Anpassung an die Klimafolgen : Strategien, Maßnahmen und Anwendungsbeispiele}, editor = {Mahammadzadeh, Mahammad and Biebeler, Hendrik and Bardt, Hubertus}, publisher = {IW-Medien}, address = {K{\"o}ln}, isbn = {978-3-602-14847-9}, pages = {287 -- 294}, language = {de} } @incollection{PlieningerBensHuettl, author = {Plieninger, Tobias and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Innovations in land-use as response to rural change - a case report from Brandenburg, Germany}, series = {Multifunctional Land Use - Meeting Future Demands for Landscape Goods and Services}, booktitle = {Multifunctional Land Use - Meeting Future Demands for Landscape Goods and Services}, editor = {Mander, {\"U}lo and Wiggering, Hubert and Hekmig, Katharina}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {978-3-540-36762-8}, pages = {369 -- 385}, language = {en} } @incollection{PlieningerThielBensetal., author = {Plieninger, Tobias and Thiel, A. and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Bioenergy Clusters in Austria and Germany: From Public Goals to Private Action}, series = {Public and Private in Natural Resource Governance: A False Dichotomy?}, booktitle = {Public and Private in Natural Resource Governance: A False Dichotomy?}, editor = {Sikor, Thomas}, publisher = {Routledge, Taylor \& Francis}, address = {London}, isbn = {978-1-84407-525-6}, pages = {149 -- 166}, language = {en} }