Institution
University of Lapland
Education•Rovaniemi, Finland•
About: University of Lapland is a education organization based out in Rovaniemi, Finland. It is known for research contribution in the topics: Arctic & Context (language use). The organization has 665 authors who have published 1870 publications receiving 39129 citations. The organization is also known as: University of Rovaniemi & Lapin yliopisto.
Topics: Arctic, Context (language use), Indigenous, Climate change, Tundra
Papers published on a yearly basis
Papers
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University of Iceland1, Umeå University2, University of Notre Dame3, Qatar University4, University of Turku5, University of Texas at Arlington6, Alfred Wegener Institute for Polar and Marine Research7, University of Alaska Fairbanks8, Adam Mickiewicz University in Poznań9, University of Alaska Anchorage10, University of Tartu11, Alaska SeaLife Center12, University of Lapland13, Spanish National Research Council14, Queen's University15, Wageningen University and Research Centre16, University of Alberta17, Aarhus University18, University Centre in Svalbard19, Vrije Universiteit Brussel20, University of Eastern Finland21, University of Greifswald22, Université du Québec à Trois-Rivières23, University of Oxford24, University of Edinburgh25, Naturalis26, University of California27, Russian Academy of Sciences28, Norwegian University of Science and Technology29, Heriot-Watt University30, University of Copenhagen31, Laval University32, Dartmouth College33, Pennsylvania State University34
TL;DR: The results show that invertebrate herbivory on dwarf birch is small in magnitude but given its prevalence and dependence on climatic variables, background invertebrates should be included in predictions of climate change impacts on tundra ecosystems.
Abstract: Chronic, low intensity herbivory by invertebrates, termed background herbivory, has been understudied in tundra, yet its impacts are likely to increase in a warmer Arctic. The magnitude of these changes is however hard to predict as we know little about the drivers of current levels of invertebrate herbivory in tundra. We assessed the intensity of invertebrate herbivory on a common tundra plant, the dwarf birch (Betula glandulosa-nana complex), and investigated its relationship to latitude and climate across the tundra biome. Leaf damage by defoliating, mining and gall-forming invertebrates was measured in samples collected from 192 sites at 56 locations. Our results indicate that invertebrate herbivory is nearly ubiquitous across the tundra biome but occurs at low intensity. On average, invertebrates damaged 11.2% of the leaves and removed 1.4% of total leaf area. The damage was mainly caused by external leaf feeders, and most damaged leaves were only slightly affected (12% leaf area lost). Foliar damage was consistently positively correlated with mid-summer (July) temperature and, to a lesser extent, precipitation in the year of data collection, irrespective of latitude. Our models predict that, on average, foliar losses to invertebrates on dwarf birch are likely to increase by 6–7% over the current levels with a 1 °C increase in summer temperatures. Our results show that invertebrate herbivory on dwarf birch is small in magnitude but given its prevalence and dependence on climatic variables, background invertebrate herbivory should be included in predictions of climate change impacts on tundra ecosystems.
49 citations
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TL;DR: The activity and composition of the seasonal Baltic Sea land-fast sea-ice biota along a salinity gradient in March 2003 in a coastal location in the SW coast of Finland was investigated using a multi-variable data set, and algal and bacterial production in relation to the physical and chemical environment were investigated.
Abstract: A study was undertaken to examine the activity and composition of the seasonal Baltic Sea land-fast sea-ice biota along a salinity gradient in March 2003 in a coastal location in the SW coast of Finland. Using a multi-variable data set, the less well-known algal and protozoan communities, and algal and bacterial production in relation to the physical and chemical environment were investigated. Also, the first coincident measurements of bacterial production and dissolved organic matter (DOM) in a sea-ice system are reported. Communities in sea ice were clearly autotrophy-dominated with algal biomass representing 79% of the total biomass. Protozoa and rotifers made up 18% of biomass in the ice and bacteria only 3%. Highest biomasses were found in mid-transect bottom ice. Water column assemblages were clearly more heterotrophic: 39% algae, 12% bacteria and 49% for rotifers and protozoa. Few significant correlations existed between DOM and bacterial variables, reflecting the complex origin of ice DOM. Dynamics of dissolved organic carbon, nitrogen and phosphorus (DOC, DON and DOP) were also uncoupled. A functional microbial loop is likely to be present in the studied ice. Existence of an under-ice freshwater plume affects the ecosystem functioning: Under-ice water communities are influenced directly by river-water mixing, whereas the ice system seems to be more independent—the interaction mainly taking place through the formation of active bottom communities.
49 citations
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TL;DR: This paper investigated tourism as work and labour in contemporary capitalist production and provided a fertile starting point for investigating tourism as a form of work and labor, instead of the traditional tourist industry as a job and labor.
Abstract: Recent theorizing on the changing patterns of gender and labour in contemporary capitalist production provides a fertile starting point for investigating tourism as work and labour — instead of the...
49 citations
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TL;DR: In this paper, a palsa mire in Finnish Lapland is studied by means of plant macrofossil analysis, physico-chemical analysis and AMS radiocarbon dating of peat deposits in order to reconstruct its development.
Abstract: A palsa mire in Finnish Lapland is studied by means of plant macrofossil analysis, physico-chemical analysis and AMS radiocarbon dating of peat deposits in order to reconstruct its development. Emphasis was on permafrost dynamics during the Holocene. Mire initiation recorded at four studied sites took place between 8240 and 5210 yr BP, first through terrestrialization of a pond and, beginning from 6780 yr BP, through paludification of birch-dominated uplands. Slow lateral expansion of the mire suggests relatively dry conditions in the region. Rich wet fens prevailed until the late Holocene, when changes connected with permafrost development occurred. First permafrost aggradation is recorded in a high palsa site at c. 2460 yr BP. The pathway of permafrost formation possibly points to a climate cooler than today. Permafrost aggradation in a ridge palsa site is dated to c. 645 yr BP, indicating an early Little Ice Age date. The long-time average carbon accumulation rate in the four peat profiles is 16 gC/m2yr. In the older, high palsa, carbon accumulation during the palsa stage has been low (9 gC/m2yr), while in the younger, ridge palsa site it has been very high (73 gC/m2yr)
49 citations
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TL;DR: In this article, the short-term responses of tundra vegetation and soils to aeolian sand and dust emanating from anthropogenically-bared surfaces in the low-arctic region of northwestern Siberia are described.
Abstract: This paper describes the short-term responses of tundra vegetation and soils to aeolian sand and dust emanating from anthropogenically-bared surfaces in the low-arctic region of northwestern Siberia. Such surfaces, including roads and quarries, are increasing substantially each year as the region undergoes massive gas- and oil-producing development. Data are presented which emphasize the ‘cumulative’ impacts of corridor construction, namely those effects which are measurable laterally, at some distance from the actual surfaces of roads and quarries, four years after their creation. In particular, changes in plant communities are documented, in addition to the chemistry and macronutrient status of mineral soils and dominant vascular plants and mosses, respectively, as affected by road-dust.Dramatic changes in plant community composition and cover were evident up to 200 m downwind from a ‘typical’ sand quarry. Although a few species appeared to respond favourably to rapid sand deposition, the great majority that were beset with it have declined in status or disappeared altogether. The exceptions were those growth-forms having the ability to keep perennating buds at or above the surface of the deepening sand (e.g. Betula nana, Salix spp., and Polytrichum spp.). The most pronounced decreases recorded were among lichens, hepatics, Sphagnum spp., and pleurocarpous mosses. The decline in Sphagnum spp., which dominate the moss layer and contribute much of the hummock-hollow microtopography, is already having a profound impact on community structure by virtually eliminating surface heterogeneity.
48 citations
Authors
Showing all 710 results
Name | H-index | Papers | Citations |
---|---|---|---|
Hong Li | 103 | 779 | 42675 |
John C. Moore | 76 | 389 | 25542 |
Jeffrey M. Welker | 57 | 179 | 18135 |
Bruce C. Forbes | 43 | 130 | 7984 |
Mats A. Granskog | 41 | 141 | 5023 |
Manfred A. Lange | 38 | 92 | 4256 |
Liisa Tyrväinen | 37 | 112 | 6649 |
Samuli Helama | 35 | 156 | 4008 |
Aslak Grinsted | 34 | 89 | 9653 |
Jukka Jokimäki | 31 | 93 | 4175 |
Sari Stark | 29 | 58 | 2559 |
Elina Lahelma | 27 | 86 | 2217 |
Jonna Häkkilä | 25 | 97 | 2185 |
Rupert Gladstone | 23 | 51 | 2320 |
Justus J. Randolph | 23 | 66 | 2160 |