scholarly journals Experimental icing affects growth, mortality, and flowering in a high Arctic dwarf shrub

2016 ◽  
Vol 6 (7) ◽  
pp. 2139-2148 ◽  
Author(s):  
Jos M. Milner ◽  
Øystein Varpe ◽  
René Wal ◽  
Brage Bremset Hansen
Keyword(s):  
High Arctic ◽  
Dwarf Shrub

Responses of Plant Litter Decomposition and Nitrogen Mineralisation to Simulated Environmental Change in a High Arctic Polar Semi-Desert and a Subarctic Dwarf Shrub Heath

Oikos ◽  
1995 ◽  
Vol 74 (3) ◽  
pp. 503 ◽  
Author(s):  
C. H. Robinson ◽  
P. A. Wookey ◽  
A. N. Parsons ◽  
J. A. Potter ◽  
T. V. Callaghan ◽  
...  
Keyword(s):  
Environmental Change ◽  
Litter Decomposition ◽  
High Arctic ◽  
Plant Litter ◽  
Dwarf Shrub ◽  
Nitrogen Mineralisation ◽  
Plant Litter Decomposition

scholarly journals Temperature sensitivity of willow dwarf shrub growth from two distinct High Arctic sites

2018 ◽  
Vol 63 (2) ◽  
pp. 167-181 ◽  
Author(s):  
Agata Buchwal ◽  
Stef Weijers ◽  
Daan Blok ◽  
Bo Elberling
Keyword(s):  
Temperature Sensitivity ◽  
High Arctic ◽  
Dwarf Shrub

scholarly journals Holocene stratigraphy and vegetation history in the Scoresby Sund area, East Greenland

1978 ◽  
Vol 129 ◽  
pp. 1-66
Author(s):  
S Funder
Keyword(s):  
Vegetation History ◽  
High Arctic ◽  
Dwarf Shrub ◽  
Betula Nana ◽  
Isostatic Uplift ◽  
Cassiope Tetragona ◽  
Pollen Diagrams ◽  
Salix Arctica ◽  
Low Arctic ◽  
Holocene Stratigraphy

The Holocene stratigraphy in Scoresby Sund is based on climatic change as reflected by fluctuations in fjord and valley glaciers, immigration and extinction of marine molluscs, and the vegetation history recorded in pollen diagrams from five lakes. The histories are dated by C-14, and indirectly by emergence curves showing the patterns of isostatic uplift. From c. 10100-10400 to 9400 yr BP the major fjord glaciers showed oscillatory retreat with abundant moraine formation, the period of the Milne Land Moraines. The vegetation in the ice-free areas was a sparse type of fell field vegetation but with thermophilous elements indicating temperatures similar to the present. From 9400 yr BP the fjord glaciers retreated rapidly in the narrow fjords, the few moraines formed are referred to the Rødefjord stages and indicate topographically conditioned stillstands. At 8000 yr BP the low arctic Betula nana immigrated into the area, and in the period until 5000 yr BP dense dwarf shrub heath grew in areas where it is now absent. In the fjords the subarctic Mytilus edulis and Pecten islandica lived, suggesting a climate warmer than the present. From c. 5000 yr BP the dense dwarf shrub heath began to disappear in the coastal areas, and a 'poor' heath dominated by the high arctic Salix Arctica and Cassiope tetragona expanded. These two species, which are now extremely common, apparently did not grow in the area until c. 6000 yr BP. In lakes in the coastal area minerogenic sedimentation at c. 2800 yr BP, reflecting the general climatic deterioration.

Phenology and resource allocation in a high arctic evergreen dwarf shrub, Cassiope tetragona

Ecography ◽  
1987 ◽  
Vol 10 (2) ◽  
pp. 128-136 ◽  
Author(s):  
M. L. N. Nams ◽  
B. Freedman
Keyword(s):  
Resource Allocation ◽  
High Arctic ◽  
Dwarf Shrub ◽  
Cassiope Tetragona

scholarly journals Deepened winter snow increases stem growth and alters stem δ 13 C and δ 15 N in evergreen dwarf shrub Cassiope tetragona in high-arctic Svalbard tundra

2015 ◽  
Vol 10 (4) ◽  
pp. 044008 ◽  
Author(s):  
Daan Blok ◽  
Stef Weijers ◽  
Jeffrey M Welker ◽  
Elisabeth J Cooper ◽  
Anders Michelsen ◽  
...  
Keyword(s):  
High Arctic ◽  
Stem Growth ◽  
Dwarf Shrub ◽  
Winter Snow ◽  
Cassiope Tetragona

Reconstructing High Arctic growing season intensity from shoot length growth of a dwarf shrub

The Holocene ◽  
2013 ◽  
Vol 23 (5) ◽  
pp. 721-731 ◽  
Author(s):  
Stef Weijers ◽  
Friederike Wagner-Cremer ◽  
Ute Sass-Klaassen ◽  
Rob Broekman ◽  
Jelte Rozema
Keyword(s):  
Growing Season ◽  
High Arctic ◽  
Shoot Length ◽  
Dwarf Shrub ◽  
Length Growth

Summer phytoplankton of the northern Barents Sea (75–80º N)

2019 ◽  
pp. 8-19
Author(s):  
Larisa A. Pautova ◽  
Vladimir A. Silkin ◽  
Marina D. Kravchishina ◽  
Valeriy G. Yakubenko ◽  
Anna L. Chultsova
Keyword(s):  
Barents Sea ◽  
Weighted Average ◽  
Arctic Basin ◽  
High Arctic ◽  
Alexandrium Tamarense ◽  
Warm Water ◽  
The Arctic ◽  
Absolute Maximum ◽  
Deep Trench ◽  
Maximum Biomass

The structure of the summer planktonic communities of the Northern part of the Barents sea in the first half of August 2017 were studied. In the sea-ice melting area, the average phytoplankton biomass producing upper 50-meter layer of water reached values levels of eutrophic waters (up to 2.1 g/m3). Phytoplankton was presented by diatoms of the genera Thalassiosira and Eucampia. Maximum biomass recorded at depths of 22–52 m, the absolute maximum biomass community (5,0 g/m3) marked on the horizon of 45 m (station 5558), located at the outlet of the deep trench Franz Victoria near the West coast of the archipelago Franz Josef Land. In ice-free waters, phytoplankton abundance was low, and the weighted average biomass (8.0 mg/m3 – 123.1 mg/m3) corresponded to oligotrophic waters and lower mesotrophic waters. In the upper layers of the water population abundance was dominated by small flagellates and picoplankton from, biomass – Arctic dinoflagellates (Gymnodinium spp.) and cold Atlantic complexes (Gyrodinium lachryma, Alexandrium tamarense, Dinophysis norvegica). The proportion of Atlantic species in phytoplankton reached 75%. The representatives of warm-water Atlantic complex (Emiliania huxleyi, Rhizosolenia hebetata f. semispina, Ceratium horridum) were recorded up to 80º N, as indicators of the penetration of warm Atlantic waters into the Arctic basin. The presence of oceanic Atlantic species as warm-water and cold systems in the high Arctic indicates the strengthening of processes of “atlantificacion” in the region.

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