Nutrient limitation of primary producers in High - arctic streams 2014
Fieldwork / Study
Geolocation is 74.481064624233, -20.538203505469
A change in nutrient concentrations will likely alter the structure of primary producers (biomass, species composition) and ecological function of the primary producers (primary production and nutrient uptake) in arctic streams. This can potentially result in a trophic cascade and thus influencing higher trophic levels in arctic streams and change the proportional contribution of primary producers (benthic algae, periphyton and moss) in the stream. In order to predict future changes it is important to increase our knowledge on primary producers in streams with different water source and how they are affected by factors impacted by climate change.
Our objectives were therefore: 1) To determine the assemblage and biomass of primary producers in five Arctic streams with different water source. The assemblage of both bryophytes and microalgae will be investigated; 2) To measure primary production on habitat scale dominated by different primary producers (epilithon, epipellon, epiphyte, moss); 3) Identify nutrient limitation and uptake rates of primary uptake compartments in the streams.
Fieldwork summary/photo blog: Link to project summary report
|Title||Project start||End date||Organisation||Department||Project study region|
|Permafrost thawing in high-Arctic causing increased organic carbon and dissolved nitrogen export to sea||01.01.2020||01.07.2023||Aarhus University (AU)||Arctic Research Centre (ARC)||Denmark|
|Nitrogen in rocks: an overlooked nutrient source in Arctic aquatic ecosystems||17.09.2019||16.09.2021||Aarhus University (AU)||Department of Bioscience||Greenland, North-East|
|Arctic ecosystems and climate change: longitudinal patterns in nutrient uptake and biodiversity in streams||16.07.2018||16.08.2018||Aarhus University (AU)||Department of Bioscience||Greenland, North-East|
|Climate and lake ecosystem dynamics in the high Arctic, over the Holocene, using lake sediment records||02.08.2016||18.08.2016||Aarhus University (AU)||Department of Geoscience, Department of Bioscience||Greenland, North-West|