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Robert B. O'Hara
Norwegian University of Science and Technology
10Publications
5H-index
42Citations
Publications 10
Newest
#1Andreas Wieser (University of Mainz)H-Index: 1
#2Friederike Reuss (Goethe University Frankfurt)H-Index: 2
Last.Markus Pfenninger (University of Mainz)H-Index: 2
view all 6 authors...
Background The invasive temperate mosquito Aedes japonicus japonicus is a potential vector for various infectious diseases and therefore a target of vector control measures. Even though established in Germany, it is unclear whether the species has already reached its full distribution potential. The possible range of the species, its annual population dynamics, the success of vector control measures and future expansions due to climate change still remain poorly understood. While numerous studie...
#1Diana E. BowlerH-Index: 13
#2Erlend B. NilsenH-Index: 19
Last.John D. C. LinnellH-Index: 50
view all 8 authors...
Despite its value for conservation decision-making, we lack information on population abundances for most species. Because establishing large-scale monitoring schemes is rarely feasible, statistical methods that combine multiple data sources are promising approaches to maximize use of available information. We built a Bayesian hierarchical model that combined different survey data of the endangered Eld’s deer in Shwesettaw Wildlife Sanctuary (SWS) in Myanmar and tested our approach in simulation...
#1Konstans Wells (University of Adelaide)H-Index: 19
#2Damien A. Fordham (University of Adelaide)H-Index: 23
Last.Nina Schwensow (University of Adelaide)H-Index: 9
view all 7 authors...
Konstans Wells, Damien A. Fordham, Barry W. Brook, Phillip Cassey, Tarnya Cox, Robert B. O'Hara, Nina I. Schwensow
#1Johannes R. Björk (ND: University of Notre Dame)H-Index: 3
#2Francis K. C. Hui (ANU: Australian National University)H-Index: 12
Last.Jose M. Montoya (CNRS: Centre national de la recherche scientifique)H-Index: 9
view all 4 authors...
Spanish Government, Grant/Award Number: BES-2011-049043; LabEx TULIP, Grant/ Award Number: ANR-10-LABX-41, ANR-11- IDEX-002-02; Region Midi-Pyrenees, Grant/ Award Number: CNRS 121090; European Research Council.
#1Eugenia ZarzaH-Index: 4
#2Robert B. O'Hara (NTNU: Norwegian University of Science and Technology)H-Index: 5
Last.Markus PfenningerH-Index: 31
view all 4 authors...
One of the major problems in evolutionary biology is to elucidate the relationships between historical events and the tempo and mode of lineage divergence. The development of relaxed molecular clock models and the increasing availability of DNA sequences resulted in more accurate estimations of taxa divergence times. However, finding the link between competing historical events and divergence is still challenging. Here we investigate assigning constrained-age priors to nodes of interest in a tim...
#1Jonas Jourdan (AMNH: American Museum of Natural History)H-Index: 7
#2Robert B. O'Hara (NTNU: Norwegian University of Science and Technology)H-Index: 5
Last.Francesca Pilotto (AMNH: American Museum of Natural History)H-Index: 9
view all 15 authors...
Abstract Long-term observations on riverine benthic invertebrate communities enable assessments of the potential impacts of global change on stream ecosystems. Besides increasing average temperatures, many studies predict greater temperature extremes and intense precipitation events as a consequence of climate change. In this study we examined long-term observation data (10–32 years) of 26 streams and rivers from four ecoregions in the European Long-Term Ecological Research (LTER) network, to in...
#1Marlee A. Tucker (Goethe University Frankfurt)H-Index: 5
#2Katrin Böhning-Gaese (Goethe University Frankfurt)H-Index: 47
Last.Tal Avgar (U of A: University of Alberta)H-Index: 15
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Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in areas with a low human footprint. We attribute this reduction to behavioral change...
#1Sami Domisch (Leibniz Association)H-Index: 11
#2Felix T. Portmann (Goethe University Frankfurt)H-Index: 15
Last.Núria Bonada (University of Barcelona)H-Index: 27
view all 13 authors...
Understanding the drivers of stream macroinvertebrate distribution patterns—the most diverse animal group in freshwater ecosystems—is a major goal in freshwater biogeography. Climate and topography have been shown to explain species' distributions at continental scales, but the contribution of natural and anthropogenically altered streamflow is often omitted in large-scale analyses due to the lack of appropriate data. We test how macroinvertebrate occurrences can be linked to streamflow observat...
#1Diana E. BowlerH-Index: 13
#2Peter Haase (University of Duisburg-Essen)H-Index: 32
Last.Hermann NeumannH-Index: 15
view all 19 authors...
Identifying patterns in the effects of temperature on species9 population abundances could help develop a general framework for predicting the consequences of climate change across different communities and realms. We used long-term population time series data from terrestrial, freshwater, and marine species communities within central Europe to compare the effects of temperature on abundance across a broad range of taxonomic groups. We asked whether there was an average relationship between temp...
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