TY - JOUR A1 - Rudner, Michael A1 - Schröder-Esselbach, Boris A1 - Biedermann, Robert A1 - Müller, Mark T1 - Habitat modelling in GIMOLUS - webGIS-based e-learning modules using logistic regression to assess species- habitat relationships Y1 - 2003 UR - http://brandenburg.geoecology.uni-potsdam.de/users/schroeder/download/publications/ rudner_schroeder_biedermann_mueller_agit2003.pdf ER - TY - JOUR A1 - Rudner, Michael A1 - Schröder-Esselbach, Boris A1 - Biedermann, Robert A1 - Kleyer, Michael T1 - Habitatmodellierung in der Landschaftsökologie N2 - Das Teilprojekt Landschafts- und Autökologie (LÖK) hat den Schwerpunkt auf die Erarbeitung einer e- Learning-Einheit zur Habitatmodellierung im allgemeinen und dem Verfahren der logistischen Regression im speziellen gelegt. In den sechs Lernmodulen der Lerneinheit werden alle für eine erfolgreiche Modellierung der Habitateignung erforderlichen Arbeitsschritte sequentiell behandelt. Die wesentlichen Schritte werden mit interaktiven Aufgaben vertieft, in welchen an entscheidenden Stellen WebGIS eingesetzt wird. Der räumliche Bezug wird in der Regel über WebGIS- Anwendungen zu einer virtuellen Landschaft hergestellt, die in das GIMOLUS-System integriert ist. Die erforderlichen Datensätze für die Analyse von Art-Habitat- Beziehungen werden bereitgestellt oder können interaktiv aus der virtuellen Landschaft erzeugt werden. Y1 - 2003 SN - 3-87907-417-8 ER - TY - JOUR A1 - Schröder-Esselbach, Boris A1 - Rudner, Michael A1 - Biedermann, Robert A1 - Kleyer, Michael T1 - Ökologische & sozio-ökonomische Bewertung von Managementsystemen für die Offenhaltung von Landschaften - ein integriertes Landschaftsmodell Y1 - 2004 UR - http://brandenburg.geoecology.uni-potsdam.de/users/schroeder/download/publications/ schroeder_etal_ufzbericht9_2004.pdf ER - TY - JOUR A1 - Kleyer, Michael A1 - Schröder-Esselbach, Boris A1 - Biedermann, Robert A1 - Rudner, Michael A1 - Fritzsch, K. A1 - Kühner, A. A1 - Poschlod, P. A1 - Kahmen, S. A1 - Tackenberg, O. A1 - Talmon, E. A1 - Poethke, H.-J. A1 - Obermaier, E. A1 - Hein, S. A1 - Hinsch, M. A1 - Henle, K. A1 - Settele, Josef A1 - Binzenhöfer, Birgit A1 - Pfeifer, A. A1 - Kögl, H. T1 - Freie Beweidung mit geringer Besatzdichte und Fräsen als alternative Verfahren zur Pflege von Magerrasen Y1 - 2004 SN - 0341-7026 ER - TY - JOUR A1 - Rudner, Michael A1 - Schröder-Esselbach, Boris A1 - Biedermann, Robert A1 - Kleyer, Michael T1 - Habitatmodellierung in GIMOLUS : e-Learning Module zur Verwendung der logistischen Regression zur Analyse der Art-Umwelt-Beziehungen Y1 - 2004 UR - http://brandenburg.geoecology.uni-potsdam.de/users/schroeder/download/publications/ rudner_etal_ufzbericht9_2004.pdf ER - TY - JOUR A1 - Binzenhöfer, Birgit A1 - Schroder, B. A1 - Strauss, B. A1 - Biedermann, Robert A1 - Settele, Josef T1 - Habitat models and habitat connectivity analysis for butterflies and burnet moths : the example of Zygaena carniolica and Coenonympha arcania N2 - In this paper, habitat models were used to predict potential habitat for endangered species, which is an important question in landscape and conservation planning. Based on logistic regression, we developed habitat distribution models for the burnet moth Zygaena carniolica and the nymphalid butterfly Coenonympha arcania in Northern Bavaria, Germany. The relation between adult occurrence and habitat parameters, including the influence of landscape context, was analyzed on, 118 sites. Habitat connectivity analyses were carried out on the basis of (1) habitat suitability maps generated from these models and (2) dispersal data from mark recapture studies. Our results showed that (1) the presence of the burnet depended mainly on the presence of nectar plants and of nutrient-poor dry grasslands in direct vicinity, that of the nymphalid on larger areas of extensively used dry grasslands within 100 m vicinity in combination with small patches of higher shrubs and bushes. (2) Internal as well as external validation indicated the robustness and general applicability of the models. Transferability in time and space indicated their high potential relevance for applications in nature conservation, such as predicting possible effects of land use changes. (3) Habitat connectivity analyses revealed a high degree of habitat connectivity within the study area. Thus, we could show no effects of isolation or habitat size for both species. (c) 2005 Elsevier Ltd. All rights reserved Y1 - 2005 ER - TY - JOUR A1 - Pagel, Jörn A1 - Fritzsch, Katrin A1 - Biedermann, Robert A1 - Schröder-Esselbach, Boris T1 - Annual plants under cyclic disturbance regime : better understanding through model aggregation N2 - In their application for conservation ecology, 'classical' analytical models and individual-based simulation models (IBMs) both entail their specific strengths and weaknesses, either in providing a detailed and realistic representation of processes or in regard to a comprehensive model analysis. This well-known dilemma may be resolved by the combination of both approaches when tackling certain problems of conservation ecology. Following this idea, we present the complementary use of both an IBM and a matrix population model in a case study on grassland conservation management. First, we develop a spatially explicit IBM to simulate the long-term response of the annual plant Thlaspi perfoliatum (Brassicaceae), claspleaf pennycress, to different management schemes (annual mowing vs. infrequent rototilling) based on field experiments. In order to complement the simulation results by further analyses, we aggregate the IBM to a spatially nonexplicit deterministic matrix population model. Within the periodic environment created by management regimes, population dynamics are described by periodic products of annual transition matrices. Such periodic matrix products provide a very conclusive framework to study the responses of species to different management return intervals. Thus, using tools of matrix model analysis (e.g., loop analysis), we can both identify dormancy within the age-structured seed bank as the pivotal strategy for persistence under cyclic disturbance regimes and reveal crucial thresholds in some less certain parameters. Results of matrix model analyses are therefore successfully tested by comparing their results to the respective IBM simulations. Their implications for an enhanced scientific basis for management decisions are discussed as well as some general benefits and limitations of the use of aggregating modeling approaches in conservation. Y1 - 2008 UR - 1960 = DOI: 10.1890/07-1305.1 SN - 1051-0761 ER -