Browsing Bergen Open Research Archive by Author "Birks, Harry John Betteley"
Now showing items 21-40 of 47
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Holocene palaeoclimate reconstructions at Vanndalsvatnet, western Norway, with particular reference to the 8200 cal. yr BP event
Nesje, Atle; Bjune, Anne Elisabeth; Bakke, Jostein; Dahl, Svein Olaf; Lie, Øyvind; Birks, Harry John Betteley (Peer reviewed; Journal article, 2006)Analyses of organic content, magnetic susceptibility, grain size and pollen in sediments from the proglacial lake Vanndalsvatnet in western Norway provide a high-resolution terrestrial record and pollenbased quantitative ... -
Identifying the driving factors behind observed elevational range shifts on European mountains
Grytnes, John-Arvid; Kapfer, Jutta; Jurasinski, Gerald; Birks, Hilary H.; Henriksen, Hanne; Klanderud, Kari; Odland, Arvid; Ohlson, Mikael; Wipf, Sonja; Birks, Harry John Betteley (Peer reviewed; Journal article, 2014-04-13)Aim In recent decades species ranges have shifted upwards in elevation and northwards in latitude. These shifts are commonly interpreted as a response to recent climate warming. However, several alternative hypotheses have ... -
The intercept is a poor estimate of a calibrated radiocarbon age
Telford, Richard J.; Heegaard, Einar; Birks, Harry John Betteley (Peer reviewed; Journal article, 2004)Intercept-based methods of generating a point estimate of a calibrated radiocarbon date are very popular, but exhibit undesirable behaviour. They are highly sensitive to the mean of the radiocarbon date and to adjustments ... -
July mean temperature and annual precipitation trends during the Holocene in the Fennoscandian tree-line area: pollen-based climate reconstructions
Seppä, Heikki; Birks, Harry John Betteley (Peer reviewed; Journal article, 2001)July mean temperature and annual precipipation during the last 9900 cal. yr BP were recon structed from pollen assemblages preserved in a sediment core from northern Finland. Quantitative recon structions were performed ... -
Lake-sediment records of recent environmental change on Svalbard: results of diatom analysis
Jones, Vivienne J.; Birks, Harry John Betteley (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 ... -
Looking forward through the past: identification of 50 priority research questions in palaeoecology
Seddon, Alistair; Mackay, Anson W.; Baker, Ambroise G.; Birks, Harry John Betteley; Breman, Elinor; Buck, C. E.; Ellis, Erle C.; Froyd, Cynthia A.; Gill, Jacquelyn L.; Gillson, Lindsey; Johnson, Edward A.; Jones, Vivienne J.; Juggins, Stephen; Macias-Fauria, Marc; Mills, Keely; Morris, Jesse L.; Nogués-Bravo, David; Punyasena, Surangi W.; Roland, Thomas P.; Tanentzap, Andrew; Willis, Katherine Jane; Aberhan, Martin; van Asperen, Eline N.; Austin, William E. N.; Battarbee, Richard W.; Bhagwat, Shonil; Belanger, Christina L.; Bennett, Keith D.; Birks, Hilary H.; Ramsey, Christopher Bronk; Brooks, Stephen J.; de Bruyn, Mark; Butler, Paul G.; Chambers, F. M.; Clarke, Stewart J.; Davies, Althea L.; Dearing, John A.; Ezard, Thomas H. G.; Feurdean, Angelica; Flower, Roger J.; Gell, Peter; Hausmann, Sonja; Hogan, Erika J.; Hopkins, Melanie J.; Jeffers, Elizabeth S.; Korhola, Atte; Marchant, Robert; Kiefer, Thorsten; Lamentowicz, Mariusz; Larocque-Tobler, Isabelle; López-Merino, Lourdes; Liow, Lee Hsiang; McGowan, Suzanne; Miller, Joshua H.; Montoya, Encarni; Morton, Oliver; Nogué, Sandra; Onoufriou, Chloe; Boush, Lisa P.; Rodriguez-Sanchez, F; Rose, Neil L.; Sayer, Carl D.; Shaw, Helen E.; Payne, Richard; Simpson, Gavin; Sohar, Kadri; Whitehouse, Nicki J.; Williams, John W.; Witkowski, Andrzej (Peer reviewed; Journal article, 2014) -
Microrefugia and shifts of Hippophae tibetana (Elaeagnaceae) on the north side of Mt. Qomolangma (Mt. Everest) during the last 25000 years
Xu, Lu; Wang, Hao; La, Qiong; Lu, Fan; Sun, Kun; Fang, Yang; Yang, Mei; Zhong, Yang; Wu, Qianhong; Chen, Jiakuan; Birks, Harry John Betteley; Zhang, Wenju (Peer reviewed; Journal article, 2014-05-19)Microrefugia at high altitudes or high latitudes are thought to play an important role in the post-glacial colonization of species. However, how populations in such microrefugia have responded to climate changes in alternating ... -
Multi-proxy studies in palaeolimnology
Birks, Hilary H.; Birks, Harry John Betteley (Peer reviewed; Journal article, 2006)Multi-proxy studies are becoming increasingly common in palaeolimnology. Eight basic requirements and challenges for a multi-proxy study are outlined in this essay – definition of research questions, leadership, site ... -
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. (Peer reviewed; Journal article, 2012)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, ... -
One hundred years of Quaternary pollen analysis 1916-2016
Birks, Harry John Betteley; Berglund, Björn E. (Peer reviewed; Journal article, 2018-03)We review the history of Quaternary pollen analysis from 1916 to the present-day, with particular emphasis on methodological and conceptual developments and on the early pioneers of the subject. The history is divided into ... -
Pattern and process in Norwegian upland grasslands: a functional analysis
Vandvik, Vigdis; Birks, Harry John Betteley (Peer reviewed; Journal article, 2002)Four classes of functional and morphological plant traits (FMT) – established strategies (the CSR scheme sensu Grime 1979), life-forms (sensu Raunkiaer 1934), morphology, and regenerative strategies – are used as tools for ... -
Pollen-based quantitative reconstructions of Holocene regional vegetation cover (plant-functional types and land-cover types) in Europe suitable for climate modelling.
Trondman, Anna-Kari; Gaillard, Marie-José; Mazier, Florence; Sugita, Shinya; Fyfe, Ralph; Nielsen, Anne Birgitte; Twiddle, Claire L.; Barratt, P; Birks, Harry John Betteley; Bjune, Anne Elisabeth; Bjørkman, L; Broström, Anna; Caseldine, Chris; David, R; Dodson, J; Dörfler, Walter; Fischer, E; van Geel, Bas; Giesecke, Thomas; Hultberg, T; Kalnina, Laimdota; Kangur, Mihkel; Van der Knaap, WO; Koff, Tiiu; Kunes, Petr; Lagerås, Per; Latalowa, Malgorzata; Lechterbeck, Jutta; Leroyer, C; Leydet, Michelle; Lindbladh, Matts; Marquer, Laurent; Mitchell, Fraser J.G.; Odgaard, Bent Vad; Peglar, Sylvia Margaret; Persson, T; Poska, Anneli; Rösch, Manfred; Seppä, Heikki; Veski, S.; Wick, L. (Peer reviewed; Journal article, 2014-10-22)We present quantitative reconstructions of regional vegetation cover in north-western Europe, western Europe north of the Alps, and eastern Europe for five time windows in the Holocene [around 6k, 3k, 0.5k, 0.2k, and 0.05k ... -
Quantifying recent ecological changes in remote lakes of North America and Greenland using sediment diatom assemblages
Telford, Richard J.; Birks, Harry John Betteley; Saros, Jasmine E.; Hazewinkel, Roderick R. O.; Perren, Bianca B.; Saulnier-Talbot, Émilie; Wolfe, Alexander P. (Peer reviewed; Journal article, 2010-04-02)Background Although arctic lakes have responded sensitively to 20th-century climate change, it remains uncertain how these ecological transformations compare with alpine and montane-boreal counterparts over the same interval. ... -
Quantitative multiproxy assessment of long-term patterns of Holocene environmental change from a small lake near Abisko, northern Sweden
Bigler, Christian; Larocque, Isabelle; Peglar, Sylvia M.; Birks, Harry John Betteley; Hall, Roland I. (Peer reviewed; Journal article, 2002)Quantitative reconstructions are made of Holocene changes in climatic and environmental conditions from analyses of pollen, chironomids and diatoms in identical stratigraphic levels of a sediment core from Vuoskkujávri ... -
Quantitative reconstruction of precipitation changes on the NE Tibetan Plateau since the Last Glacial Maximum - extending the concept of pollen source area to pollen-based climate reconstructions from large lakes
Wang, Yongbo; Herzschuh, Ulrike; Shumilovskikh, Lyudmila S.; Mischke, Steffen; Birks, Harry John Betteley; Wischnewski, Juliane; Böhner, Jürgen; Schlutz, Frank; Lehmkuhl, Frank; Diekmann, Bernhard; Wünnemann, Bernd; Zhang, Chengjun (Peer reviewed; Journal article, 2014-01-08)Pollen records from large lakes have been used for quantitative palaeoclimate reconstruction, but the influences that lake size (as a result of species-specific variations in pollen dispersal patterns that smaller pollen ... -
Recent environmental change and atmospheric contamination on Svalbard as recorded in lake sediments – an introduction
Birks, Harry John Betteley; Jones, Vivienne J.; Rose, Neil L. (Peer reviewed; Journal article, 2004)This paper outlines an interdisciplinary project on recent environmental change and atmospheric contamination on the high Arctic archipelago of Svalbard (76º30'N – 80º30'N). It describes the rationale and aims of the project ... -
Recent environmental change and atmospheric contamination on Svalbard as recorded in lake sediments – modern limnology, vegetation, and pollen deposition
Birks, Harry John Betteley; Monteith, Don T.; Rose, Neil L.; Jones, Vivienne J.; Peglar, Sylvia M. (Peer reviewed; Journal article, 2004)Twenty-four lakes on Svalbard were sampled for palaeolimnological studies and are described in terms of their geographical location, catchment characteristics, water chemistry, and flora. No sediment could be retrieved ... -
Recent environmental change and atmospheric contamination on Svalbard as recorded in lake sediments – synthesis and general conclusions
Birks, Harry John Betteley; Jones, Vivienne J.; Rose, Neil L. (Peer reviewed; Journal article, 2004)The major patterns of biostratigraphical and geochemical change detected in a multidisciplinary study on recent environmental change and atmospheric contamination on Svalbard are summarised and synthesized. The patterns ... -
Recent environmental change and human impact on Svalbard: the lake-sediment geochemical record
Boyle, John F.; Rose, Neil L.; Appleby, P. G.; Birks, Harry John Betteley (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 ... -
Recent increases in species richness and shifts in altitudinal distributions of Norwegian mountain plants
Klanderud, Kari; Birks, Harry John Betteley (Peer reviewed; Journal article, 2003)Opportunities for observing long-term changes in natural biota are rare. Observations on the distribution and frequency of vascular plants were performed on 23 mountains situated along a west–east gradient in Jotunhei men, ...