Visiting Professor Andre de Roos

By |2022-04-12T11:40:22+02:00September 21st, 2021|

Visiting professor André de Roos pushes boundaries between disciplines and shakes up established ideas in theoretical ecology Mathematicians call him an ecologist, ecologists call him a mathematician. André de Roos is comfortable in interdisciplinary research settings, having worked along the border between mathematics and ecology since his PhD. A professor of [...]

Gradual changes triggered historical shift in marine fauna

By |2021-03-09T12:45:02+01:00March 9th, 2021|

Gradual changes triggered historical shift in marine fauna Large asteroids or comets hitting Earth, massive volcanic eruptions and other single, deadly events are usually the focus for scientists seeking to reconstruct Earth’s past mass extinctions. In a new study, researchers from Umeå University and the University of Florida instead uncovered a [...]

The distribution of vertebrate animals redefines temperate and cold climate regions

By |2021-02-19T08:44:56+01:00February 19th, 2021|

The distribution of vertebrate animals redefines temperate and cold climate regions The distribution of vegetation is routinely used to classify climate regions worldwide, yet whether these regions are relevant to other organisms is unknown. Umeå researchers have established climate regions based on vertebrate species' distributions in a new study published in [...]

SPPAT: Spatial point pattern analysis of traces

By |2020-07-02T12:39:58+02:00July 2nd, 2020|

SPPAT: Spatial point pattern analysis of traces Site-selectivity patterns of drilling predators revealed by spatial point pattern analysis Trace fossils left by predators on skeletons of their prey, including drillholes, repair scars, fractures, and tooth marks, are the most powerful direct indicators of predator-prey interactions available in the [...]

Rare species survive in ghettos

By |2019-12-17T11:16:46+01:00December 17th, 2019|

Species of animals and plants with low abundances organize in ghettos to survive Similar to the organization of human cities, animal and plant communities have ghettos or ethnic neighborhoods, where low-abundant species group to enhance their persistence against more competitive species. This unexpected ecological pattern is the [...]

Glassiness and heterogeneous dynamics in dense solutions of ring polymers

By |2019-02-19T21:25:59+01:00February 19th, 2019|

Glassiness and Heterogeneous Dynamics in Dense Solutions of Ring Polymers Unknotted and unlinked ring polymers in the melt behave very differently than their linear counterparts. The reason behind this difference lies in the closed topology of the rings and on the global topological invariance of the system. In fact, crumpled rings [...]

The Genome Contact Map Explorer

By |2018-07-02T09:58:33+02:00June 20th, 2018|

The genome contact map explorer: a tool to find patterns in piles of DNA contact data The problem Every chromosome in our cells is a long polymer that is packaged and folded in particular ways. Researchers don’t exactly know how, but it is clear that it is not a random [...]

Spatial distribution of ancient marine faunas

By |2018-06-08T14:46:12+02:00June 4th, 2018|

Spatial distribution of ancient marine faunas The problem Organisms living in the same region are what defines a biogeographic province, or bioprovince.  Finding the boundaries between these bioprovinces is an important part of understanding how animals respond to natural and human-induced climate change.  Glancing back to the mid-Cretaceous period of [...]

Zero-crossing statistics: keep the bridge from falling down

By |2018-05-04T12:32:31+02:00May 4th, 2018|

Zero-crossing statistics for non-Markovian time series The problem A bridge subjected to irregular loads will gradually be damaged. If it is not maintained, disastrous consequences will follow. It’s important, then, to know when maintenance is needed.  If we know the mean number of loads within a given time interval as [...]

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