Blar i Department of Biological Sciences på emneord "Arctic"
Viser treff 1-17 av 17
-
A Modeling Study of Behavior and Sampling Bias Introduced by Artificial Light on Marine Organisms During the Polar Night
(Master thesis, 2023-06-02) -
Benthic algal vegetation in Isfjorden, Svalbard
(Peer reviewed; Journal article, 2015-08-11)Benthic algal vegetation was investigated at 10 sites in Isfjorden, Svalbard. Five sites were visited during summer 2010 and five during summer 2012. Both the littoral and sublittoral vegetation were sampled, the littoral ... -
Changes in marine prokaryote composition with season and depth over an Arctic polar year
(Peer reviewed; Journal article, 2017-04-13)As the global climate changes, the higher latitudes are seen to be warming significantly faster. It is likely that the Arctic biome will experience considerable shifts in ice melt season length, leading to changes in ... -
Diversity of dsDNA marine viral groups during winter in the Arctic Ocean north of Svalbard
(Master thesis, 2015-10-22)Extreme changes in light and cold water temperatures throughout the annual cycle in the Arctic Ocean create a unique habitat that selects for particular microorganisms - including marine viruses. This study investigated ... -
How will thawing permafrost affect the microbial abundance and diversity in the Arctic?
(Master thesis, 2020-07-09)Permafrost, permanently frozen soil, constitutes a major portion of the Earth’s terrestrial cryosphere and represents a unique niche for cold-adapted microorganisms. As the global temperature increases, it is still unknown ... -
Lake-sediment evidence for local and remote sources of atmospherically deposited pollutants on Svalbard
(Peer reviewed; Journal article, 2004)Twenty-one lakes along the west coast of Svalbard were cored between 28 July and 14 August 1995. Five cores were 210Pb dated and analysed for spheroidal carbonaceous particles (SCPs), indicators of deposition from fossil-fuel ... -
Lake-sediment records of recent environmental change on Svalbard: results of diatom analysis
(Peer reviewed; Journal article, 2004)Surface sediments from 23 lakes on Svalbard were analysed for diatoms. 182 taxa were found but samples generally have a low richness, with the majority of sites dominated by benthic genera such as Fragilaria, Navicula, and ... -
Microbial winter and spring bloom dynamics in a high Arctic fjord
(Master thesis, 2014-06-02)Knowledge of the seasonal dynamics within the Arctic marine microbial network is scarce, particularly during the polar night period. The abundances of different microbial groups in Adventfjorden, Svalbard were investigated ... -
Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland
(Peer reviewed; Journal article, 2013-12)Turbic Cryosols (permafrost soils characterized by cryoturbation, i.e., by mixing of soil layers due to freezing and thawing) are widespread across the Arctic, and contain large amounts of poorly decomposed organic material ... -
Novel and Unexpected Microbial Diversity in Acid Mine Drainage in Svalbard (78° N), Revealed by Culture-Independent Approaches
(Peer reviewed; Journal article, 2015-10-13)Svalbard, situated in the high Arctic, is an important past and present coal mining area. Dozens of abandoned waste rock piles can be found in the proximity of Longyearbyen. This environment offers a unique opportunity for ... -
Recent environmental change and human impact on Svalbard: the lake-sediment geochemical record
(Peer reviewed; Journal article, 2004)As part of a broader investigation into recent environmental change on Svalbard, the inorganic geochemical record of six lake-sediment cores was analysed. The major temporal trends in sediment elemental composition are ... -
Resilience to exogenous shocks in environmental management regimes in the Arctic – lessons learned from survivors
(Peer reviewed; Journal article, 2019-06-13)A changing climate will impact not only the environment but all levels of governance thereof, including the context of the close to 400 multilateral environmental management agreements signed since the year 2000. For the ... -
Seasonal zooplankton dynamics in Svalbard coastal waters: The shifting dominance of mero- and holoplankton and timing of reproduction in three species of Copepoda
(Master thesis, 2019-06-15)Monthly sampling was conducted in the ice-free Adventfjorden in West Spitsbergen, Svalbard, from March to November 2018 to assess the seasonal development in the Arctic zooplankton community and to investigate the seasonally ... -
Spawning during an oil spill: how exposure to the water-accommodated fraction of crude oil may disrupt polar cod (Boreogadus saida) reproduction
(Master thesis, 2020-07-01)Declining ice cover in the Arctic has made it possible to extract oil reserves in areas that were once unreachable. However, all oil exploration comes with an inherent risk of spills. Conditions in the Arctic may increase ... -
Species composition, distribution and ecology of the demersal fish community along the Norwegian coast north of Stad under varying environmental conditions
(Master thesis, 2019-06-14)In the last decades, temperatures of the Atlantic current that enters the Norwegian Coastal Current (NCC) has been above the yearly average, with 2007 as the warmest registration on record (Skagseth 2012). The climatic ... -
Strong microsite control of seedling recruitment in tundra
(Peer reviewed; Journal article, 2010-12-19)The inclusion of environmental variation in studies of recruitment is a prerequisite for realistic predictions of the responses of vegetation to a changing environment. We investigated how seedling recruitment is affected ...