A5032693320- Lichen and fungal ecology
- Botany and Plant Ecology Studies
- Climate change and permafrost
- Mycorrhizal Fungi and Plant Interactions
- Geology and Paleoclimatology Research
- Bryophyte Studies and Records
- Peatlands and Wetlands Ecology
- Botany, Ecology, and Taxonomy Studies
- Plant Taxonomy and Phylogenetics
- Plant Pathogens and Fungal Diseases
- Indigenous Studies and Ecology
- Mediterranean and Iberian flora and fauna
- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Cryospheric studies and observations
- Marine and coastal plant biology
- Environmental and Cultural Studies in Latin America and Beyond
- Polar Research and Ecology
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Atmospheric and Environmental Gas Dynamics
- Geological Studies and Exploration
- Remote Sensing in Agriculture
- Arctic and Russian Policy Studies
- Remote Sensing and LiDAR Applications
UiT The Arctic University of Norway
2014-2024
In-Q-Tel
1994
Abstract. Question: What are the major vegetation units in Arctic, what is their composition, and how they distributed among bioclimate subzones countries? Location: The Arctic tundra region, north of tree line. Methods: A photo‐interpretive approach was used to delineate onto an Advanced Very High Resolution Radiometer (AVHRR) base image. Mapping experts within nine regions prepared draft maps using geographic information technology (ArcInfo) portion these were later synthesized make final...
The number of undescribed species lichenized fungi has been estimated at roughly 10,000. Describing and cataloging these would take the existing taxonomists several decades; however, support for taxonomy is in decline worldwide. In this paper we emphasize dire need taxonomic expertise lichenology. We bring together 103 colleagues from institutions worldwide to describe a total 100 new fungi, representing wide geographic range. newly described are: Acarospora flavisparsa, A. janae,...
Abstract. Most vegetation classification studies on Svalbard have followed the phytosociological tradition. Exposed ridges and accumulation sea shores are habitats investigated best, whereas open of screes, active sedimentation plains, erosion young moraines, polar desert saxicolous range from almost unknown to poorly known. All published associations non‐ranked plant communities based relevé data reviewed discussed in an ecological framework with 19 major habitat types. them arranged a...
ABSTRACT Aim To test whether satellite‐derived NDVI values obtained during the growing season as delimited by onset of phenological phases can be used to map bioclimatically a large region such Fennoscandia. Location Fennoscandia north about 58° N and neighbouring parts NW Russia. Methods Phenology data on birch from 15 research stations half‐monthly GIMMS‐NDVI set with 8 × km 2 resolution period 1982–2002 were characterize season. link surface phenology data, new algorithms pixel‐by‐pixel...
Abstract The composition of lichen ecosystems except mycobiont and photobiont has not been evaluated intensively. In addition, recent studies to identify algal genotypes have raised questions about the specific relationship between photobiont. current study, we analyzed fungal community structures in species from King George Island, Antarctica, by pyrosequencing eukaryotic large subunit (LSU) internal transcribed spacer (ITS) domains nuclear r RNA gene. sequencing results LSU ITS regions...
The Arctic is among the regions with most rapid changes in climate and has expected highest increase temperature. Changes timing of phenological phases, such as onset growing season observed from remote sensing, are sensitive bio-indicators change. study area here High archipelago Svalbard, located between 76°30ʹ 80°50ʹN. goal this was to use MODIS Terra data (the MOD09Q1 MOD09A1 surface reflectance products, both 8-day temporal composites) map on Svalbard for 2000–2013 period interpreted...
The increased spread of insect outbreaks is among the most severe impacts climate warming predicted for northern boreal forest ecosystems. Compound disturbances by herbivores can cause sharp transitions between vegetation states with implications ecosystem productivity and feedbacks. By analysing plots prior to immediately after a widespread outbreak geometrid moths in birch forest-tundra ecotone, we document shift understorey community composition response moth outbreak. Prior outbreak,...
Idealized distributions of phytosociological syntaxa are arranged along topographical gradients on siliceous and carbonaceous substrates in the northern arctic tundra zone Svalbard. Two alliances (Luzulion arcuatae all. prov. Papaverion dahliani Hoffm. 68 em.) three associations (Gymnomitrio corallioidis ‐ Luzule‐tum ass. prov., Cetrario nivalis Luzuletum Raco‐mitrio lanuginosi — prov.) proposed. Luzulion arcticae (Nordh. 36) Gjaerev. 56 Polytrichion norvegici Gjierev. 49 described from...
Svalbard, located between 76°30'N and 80°50'N, is among the regions in world with most rapid temperature increase. We processed a cloud-free time-series of MODIS-NDVI for Svalbard. The dataset interpolated to daily data during 2000-2022 period 232 m pixel resolution. onset growth, clear phenological definition, has been mapped each year. Then integrated NDVI from (O) growth year time average (2000-2022) peak (P) (OP NDVI) have calculated. OP previously shown high correlation field-based...
Question: What are the relative influences of human impact, macroclimate, geographic location and habitat related environmental differences on species composition boreal epiphytic macrolichen communities? Location: Troms county in northern Norway. Methods: Detrended Correspondence Analysis revealed main gradient structure lists from deciduous forests. By Canonical with variance partitioning, amount attributable to spatial context was quantified. Results: There no significant effect impact...
Phylogenetic relationships between Nostoc cyanobionts in the lichen genus Pannaria were studied to evaluate their correlation geography, habitat ecology, and other patterns previously reported. The 16S rRNA gene sequences of a total 37 samples 21 species from seven countries Northern Southern hemispheres analyzed compared with 69 free-living symbiotic cyanobacterial strains. distributed throughout branch called "the Nephroma guild," within two subgroups another branch, referred as "Peltigera...
Abstract A new genus, Catenarina ( Teloschistaceae , Ascomycota), with three species is described from the Southern Hemisphere, supported by molecular data. All contain secondary metabolite 7-chlorocatenarin, previously unknown in lichens. desolata a non-littoral, lichenicolous found on volcanic and soft sedimentary rock at 190–300 m near steppes southernmost Chile subantarctic island, Kerguelen. vivasiana grows maritime rocks outcrops lowland Nothofagus forests, but has also been altitudes...
Abstract. Question: What are the relative influences of human impact, macroclimate, geographic location and habitat related environmental differences on species composition boreal epiphytic macrolichen communities? Location: Troms county in northern Norway. Methods: Detrended Correspondence Analysis revealed main gradient structure lists from deciduous forests. By Canonical with variance partitioning, amount attributable to spatial context was quantified. Results: There no significant effect...
Abstract Aim To develop a new method for bioclimate mapping where the vegetation layer is main source of climate information. Location The study area includes four subareas, all situated on Varangerhalvøya peninsula in Finnmark, north‐easternmost Norway (70–71° N). subareas were chosen to represent most climatic, topographic, geomorphologic and botanic diversity along arctic–boreal gradient area. meteorological stations show climatic with mean July temperature ranging from 10.1 12.3 °C....
Abstract Aim To describe a method for mapping local climatic variation using plants as temperature indicators. Location The study area is situated on the northern side near mouth of fiord Kangerlussuaq/Scoresby Sund, East Greenland (70–71°N). consists three subareas, divided into 136 1 × km units. It was selected because its very strong gradient shown by data from four meteorological stations in area, with mean July temperatures ranging 2.7 to 9.3 °C. Methods based fact that most vascular...
Abstract. The wet to moist bryophyte‐dominated vegetation of Sassendalen, Svalbard, was classified into seven communities. These communities were grouped (1) Cardamino nymanii‐Saxifragion foliolosae marsh; (2) Caricion stantis fen; (3) Luzulion nivalis snowbed – including manured corresponding moss tundras. All have a basically arctic distribution. Marshes are developed in habitats with water table above the bryophyte surface and fens on sites level high permafrost but below surface. Moss...
Abstract A major environmental concern regarding the Arctic is how global change effects can influence vegetation and ecosystems. The amount of summer warmth single most important variable for biological processes in Arctic, one that likely to be affected by climate change. task establish temperature conditions are modified at a very high spatial resolution. In order build up scenarios as relevant possible concerning development, key point know distribution varies related different...
Abstract Psoroma microlepideum is reduced to a synonym of P. fuegiense . The species differs in several characters from pholidotum , and it overlaps geographically with the latter, which neotypified here. These two are now placed new southern South American genus Psorophorus differing s. str. being corticolous, having adpressed squamules on distinct, dark prothallus, lacking melanins, thin cortical layer simpler IKI+ apical ascus structure. Two other widespread, panaustral only ones...