Alexander Singer

ORCID: 0000-0002-2777-3789
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About
Contact & Profiles
Research Areas
  • Species Distribution and Climate Change
  • Ecology and Vegetation Dynamics Studies
  • Wildlife Ecology and Conservation
  • Plant and animal studies
  • Pesticide and Herbicide Environmental Studies
  • Animal Ecology and Behavior Studies
  • Rabies epidemiology and control
  • Environmental Toxicology and Ecotoxicology
  • Pesticide Residue Analysis and Safety
  • Ecosystem dynamics and resilience
  • Physiological and biochemical adaptations
  • Zoonotic diseases and public health
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Yersinia bacterium, plague, ectoparasites research
  • Genetic diversity and population structure
  • Land Use and Ecosystem Services
  • Human-Animal Interaction Studies
  • Insect and Arachnid Ecology and Behavior
  • Bryophyte Studies and Records
  • Lichen and fungal ecology
  • Evolution and Genetic Dynamics
  • Animal Disease Management and Epidemiology
  • Forest Ecology and Biodiversity Studies
  • Conservation, Biodiversity, and Resource Management
  • Forest ecology and management

Swedish Species Information Centre
2016-2021

Swedish University of Agricultural Sciences
2016-2021

Leipzig University
2021

Helmholtz Centre for Environmental Research
2009-2018

German Centre for Integrative Biodiversity Research
2015-2017

Fera Science (United Kingdom)
2009-2012

Stony Brook University
2012

Singer (United States)
2010

Stockholm University
2006

Deutsches Biomasseforschungszentrum
2003

Abstract Within the field of species distribution modelling an apparent dichotomy exists between process‐based and correlative approaches, where processes are explicit in former implicit latter. However, these intuitive distinctions can become blurred when comparing approaches more detail. In this review article, we contrast extremes correlative–process spectrum models with respect to core assumptions, model building selection strategies, validation, uncertainties, common errors questions...

10.1111/j.1365-2699.2011.02659.x article EN Journal of Biogeography 2012-01-13

Abstract Aim Biotic interactions – within guilds or across trophic levels have widely been ignored in species distribution models (SDMs). This synthesis outlines the development of ‘species interaction models’ (SIDMs), which aim to incorporate multispecies at large spatial extents using matrices. Location Local global. Methods We review recent approaches for extending classical SDMs biotic interactions, and identify some methodological conceptual limitations. To illustrate possible...

10.1111/j.1365-2699.2011.02663.x article EN Journal of Biogeography 2011-12-20

Abstract Range dynamics causes mismatches between a species’ geographical distribution and the set of suitable environments in which population growth is positive (the Hutchinsonian niche). This because source–sink cause species to occupy unsuitable environments, environmental change creates non‐equilibrium situations may be absent from (due migration limitation) or present that were previously time‐delayed extinction). Because correlative models do not account for these processes, they are...

10.1111/j.1365-2699.2012.02737.x article EN Journal of Biogeography 2012-08-21

Abstract Understanding how species’ thermal limits have evolved across the tree of life is central to predicting responses climate change. Here, using experimentally-derived estimates tolerance for over 2000 terrestrial and aquatic species, we show that most variation in can be attributed a combination adaptation current climatic extremes, existence evolutionary ‘attractors’ reflect either boundaries or optima limits. Our results also reveal deep-time legacies ectotherms, whereby orders...

10.1038/s41467-021-21263-8 article EN cc-by Nature Communications 2021-02-19

How climate affects species distributions is a longstanding question receiving renewed interest owing to the need predict impacts of global warming on biodiversity. Is change forcing live near their critical thermal limits? Are these limits likely through natural selection? These and other important questions can be addressed with models relating geographical data, but inferences made are highly contingent non-climatic factors such as biotic interactions. Improved understanding effects will...

10.1038/sdata.2018.22 article EN cc-by Scientific Data 2018-03-13

Abstract Opportunistically collected species observations contributed by volunteer reporters are increasingly available for and regions which systematically data not available. However, it is unclear if they suitable to produce reliable habitat suitability models (HSMs), hence the species–habitat relationships found maps produced can be used with confidence advice conservation management address basic applied research questions. We evaluated HSMs opportunistically against observations....

10.1111/2041-210x.13012 article EN Methods in Ecology and Evolution 2018-04-17

The response of individual species to climate change may alter the composition and dynamics communities. Here, we show that impacts environmental on communities can depend nature interspecific interactions: mutualistic typically respond differently than commensalistic or parasitic We model analyse geographic range shifting metapopulations two interacting – a host an obligate species. Different types interactions are implemented by modifying local extinction rates according presence/absence...

10.1111/j.1600-0706.2012.20465.x article EN Oikos 2012-09-07

Abstract The ability of species to modulate environmental conditions and resources has long been interest. In the past three decades impacts these biotic modifiers have investigated as ‘ecosystem engineers’, ‘niche constructors’, ‘facilitators’ ‘keystone species’. This modulation can vary spatially from extremely local global, temporally days geological time, taxonomically a few very large number species. Modulation are pervasive affect, inter alia , climate, structural environments,...

10.1111/j.1365-2699.2012.02705.x article EN Journal of Biogeography 2012-08-21

Abstract Aim Species attributes are often used to explain diversity patterns across assemblages/communities. However, repeated species co‐occurrences can generate spatial pattern and strong statistical relationships between aggregated richness in the absence of biological information. Our aim is increase awareness this problem. Location North America. Methods We generated empirical using two data structures: (1) birds gridded from range maps (2) tree communities US Forest Service's Inventory...

10.1111/jbi.12953 article EN Journal of Biogeography 2017-02-15

Ensuring ecosystem resilience is an intuitive approach to safeguard the functioning of ecosystems and hence future provisioning services (ES). However, a multi‐faceted concept that difficult operationalize. Focusing on mechanisms, such as diversity, network architectures or adaptive capacity, has recently been suggested means operationalize resilience. Still, focus mechanisms not specific enough. We suggest conceptual framework, trinity, facilitate management based in three distinctive...

10.1111/oik.07213 article EN cc-by Oikos 2020-01-13

Abstract For the application of toxicokinetic-toxicodynamic (TKTD) models in European environmental risk assessment (ERA) plant protection products, it is recommended to evaluate model predictions calibration as well independent validation data set based on qualitative criteria (visual assessment) and quantitative goodness-of-fit (GoF) metrics. The aims this study were identify whether coincide with human visual perception performance which evaluator characteristics influence their...

10.1093/etojnl/vgae015 article EN cc-by Environmental Toxicology and Chemistry 2025-01-01

ContextRabies causes ~55 000 human deaths each year, primarily as a result of bites from dogs, which are the major rabies reservoir in developing world. Current control strategies include vaccination, culling and surgical sterilisation dogs. However, recently developed immunocontraceptives could be used alongside vaccination to apply fertility more animals. AimsWe modelling approach explore (1) whether adding single-dose contraceptives would improve effectiveness eradication, (2) how...

10.1071/wr10027 article EN Wildlife Research 2010-01-01

The red fox (Vulpes vulpes) is the main terrestrial wildlife rabies vector in Europe. However, recently raccoon dog (Nyctereutes procyonoides)--an invasive species originating from East Asia--has become increasingly important as secondary host, especially Baltic States. This imposes problems on neighboring rabies-free countries (such Finland), where density of each two its own might be too low to sustain a long-term epizootic, but community vectors could large enough support epizootic. In...

10.7589/0090-3558-45.4.1121 article EN Journal of Wildlife Diseases 2009-10-01

According to the projections of IPCC-scenario A1B, summer temperatures in southern Germany will increase up 2.4°C until end this century. Even more important, a remarkable change seasonal distribution precipitation is expected with an winter and decrease rainfall. Summers are predicted be warmer drier while there surplus water spring-time. Besides, extreme climate events central Europe intense frequent. Thus, forests most probably suffer from increasing frequent drought stress (Christensen...

10.2312/gfz.b103-12036 preprint EN other-oa HAL (Le Centre pour la Communication Scientifique Directe) 2011-01-01

Pomatoschistus minutus show paternal care in a resource defence mating system. We investigated the effect of nest-site availability on parasitic spawning. Each experimental pool contained four potentially nest-building males, females and nests-sites shortage (2) or excess (6). Both treatments were conducted two populations; one with natural nest-sites excess, shortage. Microsatellite-DNA revealed that all nest-holders had fertilized most eggs they tended. Yet, 35% nests by another male 14.4%...

10.1111/j.1420-9101.2006.01114.x article EN Journal of Evolutionary Biology 2006-04-23

Species recovery after disturbances depends on the strength and duration of disturbance, species traits biotic interactions with other species. In order to understand these complex relationships, it is essential mechanistically transient dynamics interacting during disturbances. We combined microcosm experiments simulation modelling studied a simple microbial food web under pulse press different predator couplings an alternative resource. Our results reveal that although affected prey...

10.1186/s12898-017-0123-2 article EN cc-by BMC Ecology 2017-04-04

In environmental risk assessment (ERA), the multitude of compounds and taxa demands cross-species extrapolation to cover variability in sensitivity toxicants. However, only impact a single compound species is addressed by general unified threshold model survival (GUTS). The reduced GUTS recommended analyse lethal toxic effects regulatory aquatic ERA. considers toxicokinetics toxicodynamics. Two toxicodynamic approaches are considered: Stochastic death (SD) assumes that decreases with an...

10.1016/j.scitotenv.2022.159266 article EN cc-by-nc-nd The Science of The Total Environment 2022-10-11

Rabies is a fatal viral disease that potentially can affect all mammals. Terrestrial rabies not present in the United Kingdom and has been eliminated from Western Europe. Nevertheless possibility remains could be introduced to England, where it would find two suitable hosts, red foxes badgers. With aim analyse spread emergency control of this species host community, simulation model was constructed. Different strategies involving anti-rabies vaccination population culling were developed,...

10.1186/1746-6148-8-79 article EN cc-by BMC Veterinary Research 2012-01-01

Large carnivores are recolonizing areas of their historical range in Europe. This process has strong implications for conservation and management related to human-wildlife conflicts. Analyses modelling the observed mechanisms spatial expansion can predict recolonization patterns under human influences. We demonstrate how spatially-explicit, agent-based models assist identify humans impact shape large carnivore recolonizations. Using detailed data obtained through long-term surveillance wolf...

10.1016/j.biocon.2020.108752 article EN cc-by Biological Conservation 2020-09-25
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