Robert B. O'Hara
Norwegian University of Science and Technology
11Publications
4H-index
50Citations
Publications 11
Newest
Published on Apr 17, 2018in bioRxiv
Eugenia Zarza4
Estimated H-index: 4
,
Robert B. O'Hara4
Estimated H-index: 4
(Norwegian University of Science and Technology)
+ 1 AuthorsMarkus Pfenninger26
Estimated H-index: 26
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...
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Published on Jun 1, 2018in Molecular Ecology 6.13
Johannes R. Björk2
Estimated H-index: 2
(University of Notre Dame),
Francis K. C. Hui11
Estimated H-index: 11
(Australian National University)
+ 1 AuthorsJose M. Montoya9
Estimated H-index: 9
(Centre national de la recherche scientifique)
In addition to the processes structuring free-living communities, host-associated microbiota are directly or indirectly shaped by the host. Therefore, microbiota data have a hierarchical structure where samples are nested under one or several variables representing host-specific factors, often spanning multiple levels of biological organization. Current statistical methods do not accommodate this hierarchical data structure, and therefore cannot explicitly account for the effect of the host in s...
2 Citations Source Cite
Published on Sep 1, 2018in Journal of Animal Ecology 4.46
Konstans Wells19
Estimated H-index: 19
(University of Adelaide),
Damien A. Fordham21
Estimated H-index: 21
(University of Adelaide)
+ 4 AuthorsNina Schwensow8
Estimated H-index: 8
(University of Adelaide)
Konstans Wells, Damien A. Fordham, Barry W. Brook, Phillip Cassey, Tarnya Cox, Robert B. O'Hara, Nina I. Schwensow
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Published on Apr 1, 2018in Science of The Total Environment 4.61
Jonas Jourdan7
Estimated H-index: 7
(American Museum of Natural History),
Robert B. O'Hara4
Estimated H-index: 4
(Norwegian University of Science and Technology)
+ 12 AuthorsFrancesca Pilotto9
Estimated H-index: 9
(American Museum of Natural History)
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...
11 Citations Source Cite
Published on Jul 1, 2018in Journal of Animal Ecology 4.46
Diana E. Bowler8
Estimated H-index: 8
,
Henning Heldbjerg6
Estimated H-index: 6
(Aarhus University)
+ 2 AuthorsKatrin Böhning-Gaese45
Estimated H-index: 45
(Goethe University Frankfurt)
2 Citations Source Cite
Published on May 14, 2017in bioRxiv
Johannes R. Björk2
Estimated H-index: 2
(University of Notre Dame),
Robert B. O'Hara4
Estimated H-index: 4
(Norwegian University of Science and Technology)
+ 2 AuthorsJose M. Montoya9
Estimated H-index: 9
(Centre national de la recherche scientifique)
The long-term stability of microbiomes is crucial as the persistent occurrence of beneficial microbes and their associated functions ensure host health. Microbiomes are highly diverse and dynamic, but are they complex to the point of being impossible to understand? We present an approach that while embracing this complexity it allows to identifying meaningful patterns: the dynamic core microbiome. We study the structure, dynamics and stability of microbiomes belonging to six marine sponges sampl...
2 Citations Source Cite
Published on Aug 1, 2017in Quaternary Science Reviews 4.33
Angelica Feurdean29
Estimated H-index: 29
,
Siim Veski19
Estimated H-index: 19
(Tallinn University of Technology)
+ 8 AuthorsJüri Vassiljev12
Estimated H-index: 12
(Tallinn University of Technology)
Abstract Disturbances by fire are essential for the functioning of boreal/hemiboreal forests, but knowledge of long-term fire regime dynamics is limited. We analysed macrocharcoal morphologies and pollen of a sediment record from Lake Lielais Svētiņu (eastern Latvia), and in conjunction with fire traits analysis present the first record of Holocene variability in fire regime, fuel sources and fire types in boreal forests of the Baltic region. We found a phase of moderate to high fire activity du...
7 Citations Source Cite
Published on May 14, 2017in bioRxiv
Johannes R. Björk2
Estimated H-index: 2
(University of Notre Dame),
Francis K. C. Hui11
Estimated H-index: 11
(Australian National University)
+ 1 AuthorsJose M. Montoya9
Estimated H-index: 9
(Centre national de la recherche scientifique)
Background: In addition to the processes structuring free-living communities, host-associated microbial communities (i.e., microbiotas) are directly or indirectly shaped by the host. Therefore, microbiota data have a hierarchical structure where samples are nested under one or several variables representing host-specific features. In addition, microbiota data are often collected across multiple levels of biological organization. Current statistical methods do not accommodate this hierarchical da...
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Published on Dec 1, 2017in Ecohydrology 2.75
Sami Domisch10
Estimated H-index: 10
(Leibniz Association),
Felix T. Portmann14
Estimated H-index: 14
(Goethe University Frankfurt)
+ 10 AuthorsNúria Bonada27
Estimated H-index: 27
(University of Barcelona)
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...
5 Citations Source Cite
Published on Jul 1, 2015in Biological Conservation 4.66
Diana E. Bowler8
Estimated H-index: 8
,
Peter Haase32
Estimated H-index: 32
(American Museum of Natural History)
+ 18 AuthorsThomas Hickler45
Estimated H-index: 45
(Goethe University Frankfurt)
Advances in phenology and pole- and up-ward shifts in geographic ranges are well-documented signs that species are responding to climate change. A deeper understanding of such responses across ecologically different species groups will help to assess future consequences for entire ecosystems. A less well-studied pattern linked with climate change is increases in abundances of warm-adapted species compared with cold-adapted species. To compare how recent climate change has affected the abundances...
18 Citations Source Cite
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