Blar i forfatter "Sjøgren, Per Johan E"

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    • DYLAN i Dividalen / Dieváidvuovdi. Rapport från WP 1 Tromsø 2012 

      Sjøgren, Per Johan E; Andreas, Kirchhefer; Storm, Dikka; Ingrid, Sommerseth; Karl, Frafjord; Arve, Elvebakk (Research report; Forskningsrapport, 2012)
      Forskningsprojektet DYLAN (Hvordan skal vi forvalte DYnamiske LANdskaper?) är ett tvärvetenskapligt projekt med ena foten i naturvetenskapen med paleoekologi, dendroekologi, botanik, zoologi samt bevarandeekologi och andra i kulturvetenskapen med arkeologi och kulturhistoria. Tanken är att ge en helhetlig bild av hur fjellandskapet och de övre dalgångarna i Norge använts och förändrat sig genom ...

    • Evenskjer Syd, Skånland k. Dokumentasjon av dyrkingslag fra Førromersk Jernalder og Vikingtid 

      Sjøgren, Per Johan E; Oppvang, Janne; Kjellman, Erik; Kirchhefer, Andreas; Lind, Keth Elisabeth (Research report; Forskningsrapport, 2018)
      De arkeologiske undersøkelsene fant sted i slutten av mai og varte i to dager. Det ble sjaktet maskinelt for å få fram profiler av dyrkningslagene. To arkeologer og en gravemaskinfører åpnet sjaktene. Paleobotaniker var én dag i felt og stod for prøveuttakning. I profilen identifiseres tre dyrkingslager. Et ble datert til førromersk jernalder, 400–150 f.Kr., et til vikingtida / tidlig middelalder ...

    • Historical legacy of the old-growth pine forest in Dividalen, northern Scandes 

      Sjøgren, Per Johan E; Kirchhefer, Andreas (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-11-30)
      The Dividalen (Sami: Dieváidvuovdi) valley in Troms county, North Norway, is well known for its old-growth pine forest, a biodiversity hotspot for dead wood-inhabiting fungi and lichens. The majority of the valley is protected within the Upper Dividalen Landscape Conservation Area and National Park. A general conception is that until the mid-nineteenth century when agriculture and forestry entered ...

    • Holocene vegetation change in northernmost Fennoscandia and the impact on prehistoric foragers 12 000–2000 cal. a BP – A review 

      Sjøgren, Per Johan E; Damm, Charlotte Brysting (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-14)
      While single pollen records are widely used in reconstructing the environment for nearby prehistoric settlements, they are less helpful when addressing large‐scale issues of variation in human settlement patterns. In order to assess the impact of vegetation change on regional prehistoric settlement and subsistence patterns in an ecotone sensitive area, we inferred the general change in main vegetation ...

    • How well can near infrared reflectance spectroscopy (NIRS) measure sediment organic matter in multiple lakes? 

      Ancin Murguzur, Francisco Javier; Brown, Antony; Clarke, Charlotte; Sjøgren, Per Johan E; Svendsen, John-Inge; Alsos, Inger Greve (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-19)
      Loss-on-ignition (LOI) is the most widely used measure of organic matter in lake sediments, a variable related to both climate and land-use change. The main drawback for conventional measurement methods is the processing time and hence high labor costs associated with high-resolution analyses. On the other hand, broad-based near infrared reflectance spectroscopy (NIRS) is a time and cost efficient ...

    • Investigating long-term human ecodynamics in the European Arctic: Towards an integrated multi-scalar analysis of early and mid Holocene cultural, environmental and palaeodemographic sequences in Finnmark County, Northern Norway 

      Damm, Charlotte Brysting; Skandfer, Marianne; Jørgensen, Erlend Kirkeng; Sjøgren, Per Johan E; Vollan, Kenneth Webb Berg; Jordan, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-26)
      Most parts of the Circumpolar Arctic have only discontinuous evidence for long-term human settlement. In contrast, Northern Norway has an unbroken archaeological record that extends back to the early Holocene. Numerous high-resolution archaeological and palaeoenvironmental records have been generated by commercial excavations and surveys, offering archaeologists unique opportunities to investigate ...

    • Last Glacial Maximum environmental conditions at Andøya, northern Norway; evidence for a northern ice-edge ecological “hotspot” 

      Alsos, Inger Greve; Sjøgren, Per Johan E; Brown, Antony; Gielly, Ludovic; Merkel, Marie Føreid; Paus, Aage; Lammers, Youri; Edwards, Mary E.; Alm, Torbjørn; Leng, Melanie; Goslar, Tomasz; Langdon, Cathrine; Bakke, Jostein; Van Der Bilt, Willem (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-05)
      Andøya on the NW coast of Norway is a key site for understanding the Last Glacial Maximum (LGM) in northern Europe. Controversy has arisen concerning the local conditions, especially about the timing and extent of local glacial cover, maximum July temperatures and whether pine and/or spruce could have grown there. We reviewed all existing data and add newly analysed ancient sedimentary DNA ...

    • Natural and cultural heritage in mountain landscapes: towards an integrated valuation 

      Speed, James David Mervyn; Austrheim, Gunnar; Birks, Harry John Betteley; Johnson, Sally; Kvamme, Mons; Nagy, Laszlo; Sjøgren, Per Johan E; Skar, Birgitte; Stone, Duncan; Svensson, Eva; Thompson, Des B.A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-11-30)
      Mountain areas of Europe have been managed by humans for a long time, leading to a prevalence of semi-natural habitats in mountain landscapes today. These landscapes contain both natural and cultural heritage; however, natural and cultural heritage are rarely considered together when valuing landscapes and developing management plans in protected areas. Here we present a case study of seven protected ...

    • Paleoekolgiska undersökningar i samband med utvidgelse av E8 i Lavangsdalen 

      Sjøgren, Per Johan E (Research report; Forskningsrapport, 2013)
      Inför utvidgelsen av E8 i Lavangsdalen identifierades två fredade samiska kulturminneslokaliteter (Sametinget 2011) vilka delvis eller helt skulle förstöras i samband med utbyggningen och krävde vidare undersökningar. Det rörde sig om kulturspår från samisk renskötsel vilket i första hand gav sig uttryck som förändringar i dagens vegetation. För att få en förståelse av hur långt tillbaka i tiden den ...