A5074437473- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Botany and Plant Ecology Studies
- Lichen and fungal ecology
- Genetic diversity and population structure
- Polar Research and Ecology
- Ecology and biodiversity studies
- Geology and Paleoclimatology Research
- Plant and animal studies
- Forest Insect Ecology and Management
- Climate change and permafrost
- Indigenous Studies and Ecology
- Rangeland and Wildlife Management
- Botanical Studies and Applications
- Botany, Ecology, and Taxonomy Studies
- Cryospheric studies and observations
- Forest Management and Policy
- Global Trade and Competitiveness
- Forest Ecology and Biodiversity Studies
- Marine and coastal plant biology
- Organic Food and Agriculture
- Peatlands and Wetlands Ecology
- Education, Healthcare and Sociology Research
- Plant and fungal interactions
- Environmental Philosophy and Ethics
Norwegian University of Science and Technology
2023-2025
Advanced Neural Dynamics (United States)
2024
Norwegian Institute for Nature Research
2015-2023
Northern Arizona University
2023
Equinor (Norway)
2023
University of Edinburgh
2023
American Museum of Natural History
2010-2012
UiT The Arctic University of Norway
2011-2012
University of Oslo
2007-2011
Tromsø research foundation
2010
The ability of species to track their ecological niche after climate change is a major source uncertainty in predicting future distribution. By analyzing DNA fingerprinting (amplified fragment-length polymorphism) nine plant species, we show that long-distance colonization remote arctic archipelago, Svalbard, has occurred repeatedly and from several regions. Propagules are likely carried by wind drifting sea ice. genetic effect restricted was strongly correlated with the temperature...
Long-distance dispersal (LDD) processes influence the founder effect on islands. We use genetic data for 25 Atlantic species and similarities among regional floras to analyse colonization, test whether five islands is associated with distance, island size traits. Most colonized postglacially via multiple events from several source regions situated 280 >3000 km away, often not closest ones. A strong was observed insect-pollinated mixed maters, it increased distance decreased in accordance...
Biogeographers claimed for more than a century that arctic plants survived glaciations in ice-free refugia within the limits of North European ice sheets. Molecular studies have, however, provided overwhelming support postglacial immigration into northern Europe, even from west across Atlantic. For first time we can here present molecular evidence strongly favouring situ glacial persistence two species, rare arctic-alpine pioneer species Sagina caespitosa and Arenaria humifusa. Both belong...
Abstract Aim High intra‐specific genetic diversity is necessary for species adaptation to novel environments under climate change, but tracking suitable conditions are losing alleles through successive founder events during range shift. Here, we investigated the relationship between shift since Last Glacial Maximum ( LGM ) and extant population across multiple plant understand variability in responses. Location The circumpolar Arctic northern temperate alpine ranges. Methods We estimated...
Abstract Aim The A rctic has experienced marked climatic differences between glacial and interglacial periods is now subject to a rapidly warming climate. Knowledge of the effects historical processes on current patterns diversity may aid predictions responses vegetation future climate change. We aim test whether plant species genetic are correlated with time since deglaciation at regional local scales. also investigate richness in vascular plants. Location Circumarctic. Methods investigated...
Abstract Aim Arctic plant phylogeography has largely focused on seed plants, and studies other groups are necessary for comparison. Bryophytes have a unique life cycle can be resistant to extreme conditions, suggesting that their phylogeographic patterns may differ from those of vascular plants. We address the history bryophyte genus Cinclidium in order assess: (1) interspecific relationships, (2) whether its current broad circumarctic distribution results recent dispersal or been maintained...
Quaternary glaciations have played a major role in shaping the genetic diversity and distribution of plant species. Strong palaeoecological evidence supports postglacial recolonization most species to northern Europe from southern, eastern even western glacial refugia. Although highly controversial, existence small situ refugia has recently gained molecular support. We used genomic analyses examine phylogeography that is critical this debate. Carex scirpoidea Michx subsp. dioecious,...
Summary Flowering phenology is an indicator of the impact climate change on natural systems. Anthropogenic has progressed over more than two centuries, but ecological studies are mostly short in comparison. Here we harness large‐scale digitization herbaria specimens to investigate temporal trends flowering at a global scale. We trained convolutional neural network model classify images angiosperm herbarium as being flower or not flower. This was used infer across 8 million spanning century...
Abstract Aim The oceanic Saxifraga rivularis L. presents one of the most extreme disjunctions known in arctic flora: it has a small amphi‐Beringian range and larger amphi‐Atlantic one. It was recently suggested to have had single allopolyploid origin Beringia at least glacial cycle ago, followed by gradual expansion more humid period differentiation into two allopatric subspecies (the Atlantic ssp. Beringian arctolitoralis ). Here we explore history its disjunction. Location northern...
The red-listed, amphi-Atlantic sedge Carex rufina is highly specialized to certain alpine snowbeds, and threatened by current changes in snow cover duration moisture conditions. Here we address its range-wide genetic diversity, history, conservation using amplified fragment length polymorphisms (AFLPs). Despite extensive primer testing, detected very low overall diversity (4.1% polymorphic markers). Only a single AFLP phenotype was found throughout Norway across the Atlantic Iceland...
Abstract Take‐Home Message Climate warming is transforming the Arctic at an unprecedented rate with previously barren and sparsely vegetated landscapes undergoing “greening”. We postulate that observed vegetation changes throughout are not only tied to warming, but in soil properties their impacts on plants microbial communities. A key understanding extent patterns of greening formerly environments will be unravel interactions between biosphere role genesis.
Abstract 1 . Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some become ecologically harmful by threatening native biota. This can lead irreversible changes in local biodiversity ecosystem functioning, and, ultimately, biotic homogenisation. 2 We risk‐assessed all plants, animals, fungi algae, within certain delimitations, that are known reproduce Norway. Mainland Norway Arctic archipelago Svalbard plus Jan Mayen were treated as separate...
Abstract Rising human activity in the Arctic, combined with a warming climate, increases probability of introduction and establishment alien plant species. While settlements are known hotspots for persistent populations, little is about colonization particularly susceptible natural habitats. Systematic monitoring lacking available survey methods vary greatly. Here, we present most comprehensive vascular species high‐Arctic archipelago Svalbard to date, aimed at (i) providing status within...
Background: Many alpine plants are rare in Scotland. Their persistence depends on their ability to withstand habitat fragmentation and loss due changes land use, increased grazing pressure, climate change. Aims: We use a phylogeographic approach address the origin genetic diversity of Scottish populations, which is relevant for future management protection. Methods: review studies that include populations common plants, present unpublished data eleven more species. results from amplified...
Abstract Loss of biodiversity is accelerating, including the loss genetic diversity. Conservation small, isolated populations may be important, as they can provide valuable contributions to overall variation and long-term viability species. Furthermore, such play an essential role in adaptation new environments following changes e.g. land-use climate. Dracocephalum ruyschiana a threatened plant species throughout its European distribution, but 25% are situated within Norway. Therefore, has...
The terrestrial high-Arctic has, so far, escaped the worst impacts of non-native plant establishment. However, increasing human activity and changing climate raise risk introductions establishment, respectively. lack biosecurity in Arctic is thus concern. To facilitate development measures on rapidly warming highly trafficked archipelago Svalbard, we generated ecological niche models to map bioclimatic potential 27 established or door-knocker vascular species across identify with a high...
Abstract There is a growing demand for ecological restoration using suitable seeds following international standards or national legal demands local seed‐sourcing. However, before selecting the appropriate geographic origin of seeds, it vital to explore taxonomic complexity related focal taxa. We used ddRAD‐seq screen genomic diversity within Carex bigelowii s.lat. focussing on Norway. This species complex considered candidate seeding, but presents considerable morphological, ecological, and...