Profile and further web presence
Areas of responsibility
Research and teaching in the field of herpetology with a focus on biogeography, (macro-)ecology, conservation research
Supervision of the scientific herpetology collection in Bonn
Research interests
In view of the global biodiversity crisis caused by the massive loss of habitats and man-made climate change, we are facing major challenges that can only be assessed and ultimately overcome with the help of ecological modelling. The loss of biological and genetic diversity can already be observed in most of the world's biomes. The central questions are: What can limit the spread of species? How can populations react to changes? What adaptation mechanisms are available to them? How do they react across different temporal and geographical scales, and how can predictive models be calculated to forecast possible future developments? Research on these topics has intensified considerably over the last two decades, has a strong interdisciplinary focus and has produced many exciting new findings.
Together with my research group, I am investigating the effects of climate and land-use changes on different time scales, from currently observable range shifts and rather short-term range dynamics of (invasive) species (several years to decades) to evolutionary adaptations during speciation (several million years). Our favoured taxa are amphibians and reptiles, which are particularly suitable as study organisms due to their high dependence on environmental factors. We have always focussed on the search for causal ecological mechanisms that determine distribution and abundance patterns in relation to environmental factors. We use the knowledge gained to make predictions for the future.
Over the years, we have been able to significantly expand the range of methods and optimise them with our own approaches, which have been specially developed for dealing with complex issues. These include various techniques of correlative, mechanistic and hybrid species distribution modelling, climatology and remote sensing, palaeontology, ecophysiology/thermobiology, movement ecology including the modelling of land-use-dependent dispersal, invasion biology, auto- and synoecology, phylo- and population genetics and applied nature conservation planning. The methodological approaches developed in-house include, for example, various techniques for modelling species distribution using multitemporal and drone-based remote sensing data as well as statistical methods for quantifying niche divergence patterns. The spatial scales considered range from the analysis of global patterns of entire distribution areas to very fine-scale analyses of individual habitats in the range of a few centimetres.
In addition to the use of global databases, our field- and collection-based research often provides important databases for our analyses, for which I develop appropriate pipelines myself (R, Julia, etc.).
Awards and honours
Since 2023 Privatdozent - Habilitation in Biology: 'Biodiversity in Transition: Integrative Approaches to Analysing Ecological and Evolutionary Processes in Zoogeography', Faculty of Mathematics and Natural Sciences, Rheinische Friedrich-Wilhelms-Universität Bonn
Since 2010 Professor and permanent assistant in the Postgraduate Programme in Zoology at the Universidade Estadual de Santa Cruz, UESC, Brazil
Teaching
Rheinische Friedrich-Wilhelms-Universität Bonn
OEP-A23 Advanced Bioinformatics in Phylogenetics, Evolutionary Biology and Biodiversity research:
- Introduction to Scientific Programming in R (seminar/exercise)
- Introduction to GIS / species distribution modelling (seminar/exercise)
OEP-B30 Advanced Course in Combining Field and Lab Techniques and Methods in Organismic Biology, Evolutionary Biology or Paleobiology
OEP-C02 / WBIO-F-02: Zoogeography and ecology of marine organisms in tropical habitats (with an excursion to the Red Sea, Dahab/Egypt) (Seminar/Excursion)
OEP-B16 Evolution, and Biodiversity of Lower Vertebrates (block course)
OEP-B19 Patterns and Processes Shaping Biodiversity (Seminar)
WBIO-E-01 Free practical courses for BSc Biology
SS 2013 - SS 2018
OEP-Free-1G, Ecology and zoogeography of the Pannonian area, with a field trip to the Lake Neusiedl / Austria, Hungary (seminar, practical, excursion, together with W. Böhme and C. Koch, discontinued)
WS 2010/2011
OEP-Free-1C, Distribution patterns, speciation and phylogenetics of vertebrates in the Palaeotropics (seminar, together with R. van den Elzen and F. Herder, discontinued)
WS 2011/2012 7010100212 Introduction to Zoology (lecture together with W. Böhme and F. Herder)
SS 2011 Introduction to Species Distribution Modelling (internal practical ZFMK)
University of Trier
WS 2010/2011 LV 65531, Evaluating biodiversity (seminar)
WS 2009/2010 LV 65531, Information search and management (lecture/practical)
LV 65800, Principles of chorology (practical within it the topic Ecological Niche Modelling only; together with S. Lötters)
LV 65808, Vertebrates II (amphibians) (lecture/practical within it the topic bioacoustics only)
SS 2009, Biogeography of Africa (seminar together with S. Lötters)
LV 65512, Diversification within the Amazon and Congo basin (seminar together with S. Lötters)
LV 65808, Vertebrates II (amphibians) (lecture/practical within it the topic bioacoustics only)
LV 65502, Principles of chorology (lecture/practical within it the topic Ecological Niche Modeling only; together with S. Lötters)
Universidade Estadual de Santa Cruz (UESC), Brazil
SS 2022 "Redação científica para zoólogos" (scientific writing for zoologists), lecture/practical together with M. Solé
WS 2020/2021 OEP-Free-1D, Evolution, and biodiversity of lower vertebrates (joint lecture/practical at UESC and ZFMK, together with F. Herder, and T. Ziegler)
SS 2010 Ecologia, sistemática e conservação de anfíbios [Ecology, systematics and conservation of amphibians] (lecture/practical together with M. Solé)
Supervised theses
Ongoing work
Baral, S. PhD thesis: Landscape genetics improve conservation planning in selected taxa in Tibet.
Chiacchio, M. PhD thesis: Impacts of winter tourism on habitat quality for selected amphibian and reptile species.
Grundmann, D. PhD thesis: Impacto da exposição a diferentes temperaturas sobre a obtenção de alimento e desenvolvimento em Boa constrictor Linnaeus, 1758. UESC, Brazil
Meyers, E. M. PhD thesis: Conservation strategies for the critically endangered Angel Shark (Squatina squatina).
Nelson, S. MSc thesis: Is the geographic location of hybrid zones environmentally dependent in Triturus ssp.? (Univ. Cologne)
Ostrowski, N. BSc thesis:New strategies for optimizing SDMs – a simulation approach
Parmar, D. S. PhD thesis: Diversity and distribution of herpetofauna in the Goa Gap region and The Dangs, Western Ghats, Peninsular India
Rose, A., MSc thesis: Predicting the potential distribution of Laonastes aenigmamus under current and future climate (Univ. Cologne)
Sampaio, M. M. A. da Sá, PhD thesis: How to end control and eradication programmes of invasive species on dendritic stream networks
Vinícius dos S. A. Vieira, M. PhD thesis: How does climate change affect biological interactions? (UESC) Dissertation
Wirges, N. J. MSc thesis: Niche evolution in Hemidactylus: correlative vs. mechanistic approaches
2024
Ecker, Y. An analysis on habitat specific adaptations of the subdigital epidermal microfibrillar outgrowths within the genus Cyrtodactylus (Gekkota: Squamata). Master ThesisGinal, P.: Invasion biology of amphibians and reptiles- from observations to predictive spatial models. PhD Thesis
Groß, T. T.: Comparison of 2- and 3- dimensional analysis of gecko claws (Squamata, Gekkonidae, Cyrtodactylus). Bachelor Thesis
Heckmann, J. H.: Effects of habitat specialization and the evolution of adhesive toepads on the dorsal digit musculature of the genus Cyrtodactylus (Gekkota, Squamata). Master Thesis
Kukla, Y.: The role of toepad configurations in Gekkonid diversity: linking morphology to ecology and distribution. Master Thesis
Liz, A. V.: Comparative phylogeography of the Sahara-Sahel – a spatial-temporal approach to biodiversity dynamics in the largest warm desert on Earth. PhD Thesis Univ. Lissabon
Manno, J.: Connecting phalangeal structure, habitat preference and evolution of adhesive toepads in Cyrtodactylus Gray (Gekkota, Squamata): a geometric morphometric approach. Bachelor Thesis
Steib, L. M., MSc thesis: Investigating amphibian and reptile distributions in Romania: comparision of static and dynamic modelling approaches and their conservation values
Tan, W. C.: Effects of habitat fragmentation on herpetofauna in Southeast Asia: From broad-scale responses to fine-scale responses in an everchanging anthropogenic landscape. PhD thesis
2023
Altenhofen, J.: Landscape structure vs. Olympic village effects: modelling spatial sorting biases in an invasive amphibian. Bachelor ThesisClement, V. F.: Home range and ecology of a palearctic lacertid: combining novel and old approaches to assess Lacerta agilis Linnaeus,1758 in the center of its distribution with conisderations for conservation. PhD Thesis
Noordermeer, C.: Toe pad evolution in Australian Geckos. Master Thesis Univ. Leiden
Kyaw, N. W.: Home range and spatial habitat use in Burmese star tortoise (Geochelone platynota). Master Thesis
Regnet, R. A.: Ontogenia e Morphologia Comparativa de Girinos de Anuros. PhD Thesis
Sperling, K.: Amphibians and reptiles of Ethiopia – Biogeography, conservation priority areasand potentials fort he One Plan Approach. Master Thesis
2022
Deiß, F.: Microclimatic specific performance of the chytrid fungus Batrachochytrium salamandrivorans: a very high resolution spatial conservation assessment within the preferred habitats of Salmandra salamandra (Linnaeus, 1758) in western Germany. Master ThesisHarrer, S.: Identifying priority areas for conserving Vietnams Ichthyofauna. Bacherlor Thesis
Rech, I.: Geckos in zoos – conservation breeding or show-off keeping? Master Thesis
Reichert, M.: Developmental ecology of Discoglossus sp. tadpoles: does density affect growth rates?Bachelor Thesis
2021
Prieto Ramirez, A. M.: Understanding the impact of habitat fragmentation on Lacerta viridis across its range. PhD thesis.Schmitz, L.: Seasonal variations in microhabitat use in Lacerta agilis? Master thesis
2020
Macedo, E. F. Impacto potencial das mudanças climáticas sobre a distribuição do gênero Ophiodes Wagler, 1828 (Squamata: Anguidae) e implicações para a conservação das espécies. Master thesis – Universidade Estadual de Santa CruzSchluckebier, R.: Spatial Habitat Use in Lacerta agilis Linnaeus, 1758. Master thesis
2019
Nania, D.: Niche evolution and potential distribution of Lepidodactylus lugubris. Master thesisPilch, T. T.: The scales of the soles of monitor lizards’ feet (Squamata: Varanidae: Varanus spp.) and their potentially adhesive property. Bachelor thesis
Platzen, J.: A method to evaluate the climatic profile of a species by the example of Lacerta agilis LINNAEUS, 1758, in the Dellbrücker Heide. Master thesis
Villa Nova, M. F.: Padrões de diversidade de anfíbios ao longo de um gradiente altitudinal na Estação Ecológica de Wenceslau Guimarães, Sul da Bahia, Brasil. Master thesis (UESC, Brazil)
2018
Behr, N.: Assessing the status of poorly known amphibians. Are they really local endemics or just a sampling artifact? Master thesisBüschen, J.: Developmental ecology of Dendropsophus marmoratus. Bachelor thesis
Demand, T.: Phenotypic plasticity and thermal limits in amphibians. Bachelor thesis
Jacken, A.: Which species are in captive breeding projects in Zoos? Master thesis
Mahnke, A.: Ultrastructure of the adhesive apparatus in Phelsuma spp. Master thesis
Von Oy, R.: Using SDMs to assess the invasion potential of reptiles. Bachelor thesis
Rao, S.: Assessing the distribution and conservation status of Squatina squatina on the Canary Islands. Bachelor thesis
2017
Clement, V. F.: Habitat Assessment and Behavior of Lacerta agilis LINNAEUS, 1758 in the Wahner Heide – An Ecological Profile of a Widespread Species in the Center of its Distribution. Master thesisGalunder, K.: Developmental ecology and larval staging in Polypedates otilophus (Boulenger, 1893) (Anura: Rhacophoridae). Bachelor thesis
Ihlow, F.: Herpetodiversity of Asia with a Special Focus on the Taxonomy, Ecology, and Distribution of Southeast Asian Chelonians. PhD thesis
Plagge, L.: Temperature dependent performance in larvae of Ambystoma mexicanum (Shaw, 1798) (Caudata: Ambystomatidae). Bachelor thesis
Reich, A.: Field study on thermoregulation of Lacerta agilis (Squamata: Lacertidae) in the NSG Wahner Heide. Master thesis
Sönnichsen, K.: Comparative feeding ecology and morphometrics of Lyciasalamandra species (Amphibia: Salamandridae) from Anatolia and Greece. Master thesis
Stupp, S.: Reexamination of Paul Müller’s collection of anurans from the Island of São Sebastião (Atlantic Rainforest of São Paulo, Brazil) and comparison with recent herpetofauna of this and comparable regions. Bachelor thesis
2016
Behr, N.: Comparative larval development and behavioral thermoregulation in the Yellow-Bellied toad Bombina variegata (Linnaeus, 1758) (Anura: Bombinatoridae). Bachelor thesisEngler, J. O.: Entwicklung und Anwendung eines kombinierten Methodenansatzes zur Analyse landschaftsspezifischer Effekte auf den Genfluss terrestrischer Organismen. PhD thesis
Drüke, Y.: Comparative analysis of the feeding ecology of the gecko Hemidactylus mabouia in its invasive and native range. Bachelor thesis
May, G.: Using spatial data in R: Modeling potential dispersal pathways of an invasive amphibian. Bachelor thesis
Weishaar, M.: Biogeography and environmental niche evolution in the genus Pelusios. Master thesis
2015
Ferreira, R. B.: Impacts on threatened amphibians in a Brazillan Atlantic Forest mosaic. PhD thesis (scientific committee member, Department of Wildland Resources and Ecology Center, Utah State University, USA)Fonseca, E. E.: Potencial invasor de serpentes exóticas no Brasil. Master thesis (Universidade Estadual de Santa Cruz)
Hörnes, D.: Herpetofauna of the Parque Nacional Cordillera Azul, Peru. Master thesis
Klein, B.: Entwicklungsbiologie ausgewählter Pfeilgiftfrösche der Gattung Ranitomeya. Master thesis
Krings, M.: Tadpole descriptions of different poison dart frogs of the genus Ranitomeya (Anura: Dendrobatidae) and their morphological comparison. Master thesis
Lemm, L.: Environmental niche evolution in the amphibian family Mantidactylidae. Master thesis
Linden, J. K.: Assessing biogeographical patterns in American freshwater turtles using a node-based analysis technique. Master thesis
Meyers, E. M.: Patterns in the distribution, population structure and habitat use of the Angel Shark (Squatina squatina). Master thesis
Prokant, F.: Phylogeny of the Grass Snake (Natrix natrix) based on Integrative Taxonomy. Master thesis
Vogt, S.: Invasionsbiologie von Xenopus laevis: Charakteriserung des Beutespektrums. Master thesis
2014
Mödrath, C.: Habitatnutzung von Großsäugern in der ariden Otjimbingwe Region von Namibia. Master thesisReich, A.: Behavioral thermoregulation of tropical dart-poison frog larvae of the genus Epipedobates (Anura: Dendrobatidae) across multiple developmental stages. Bachelor thesis
Marques da Siva, R.: Compositcao, distrubuicao e historia natural da cumunidade de serpentes do litoral notre da Bahia, Brasil. Master thesis (Universidate Estadual de Santa Cruz)
Kurth, M.: Vergleichende Reproduktionsbiologie und Larvalentwicklung von Epipedobates anthonyi / E. tricolor. Bachelor thesis
2012
Flecks, M.: A systematic revision of the African members of the genus Lygodactylus Gray, 1864. Diploma thesisGünther, F.: Which importance has the Red River in Vietnam for the distribution of Goniurosaurus (Squamata: Eublepharidae) and Cyrtodactylus (Squamata: Gekkonidae)? A Survey based on SDMs and niche comparisons. Master thesis
Lierz, T.: Räumlich explizite Analysen der morphologischen Variation iberischer Lacertiden. Master thesis
Pertel, W.: Predicting the potential distribution of amphibians in the central corridor of the Atlantic rainforest. Master (Universidate Estadual de Santa Cruz)
2011
Dubke, M.: Taxonomy and Zoogeographie of Ptychadena (Boulenger, 1817): Quantity of cryptic batrachodiversity? Bachelor thesisHörnes, D.: Current and past diversity patterns of North American chelonians: is there evidence of historical community reshuffling? Bachelor thesis
Nekum, S.: Kartierung und potentielle Verbreitung der Zauneidechse Lacerta agilis im Stadtgebiet von Köln. Diploma thesis (co-supervisor)
2010
Hahn, G.: The potential distribution of Varanus niloticus and V. ocellatus. Diploma thesis (Trier University, co-supervisor)Weinsheimer, F.: The herpetofauna of the Kimboza Forest with special focus on the Turquoise Dwarf Gecko (Lygodactylus williamsi). Diploma thesis (co-supervisor)
Weinmann, T.: Comparisons of climate niches in Neotropical poison frogs (Dendrobates). Diploma thesis (Trier University, co-supervisor)
Projects
Evolution of the gecko's adhesive toes
Management: PD Dr. Dennis Rödder