Results 81 to 90 of about 11,541 (176)

Clonal plasticity and diversity facilitates the adaptation of Rhododendron aureum Georgi to alpine environment.

PLoS ONE, 2018
Four small oval populations and five large intensive populations of Rhododendron aureum growing at the alpine in Changbai Mountain (China) were studied in two types of habitat (in the tundra and in Betula ermanii forest).
Xiaolong Wang, Wei Zhao, Lin Li, Jian You, Biao Ni, Xia Chen   +5 more
doaj   +1 more source

Induced polyploidy in Betula.

Silva Fennica, 1990
Seeds of ten different species were treated with colchicine solution during germination, to induce duplication of the chromosome set. The species included in the study were and . The total number of individually labelled, colchicine-treated trees was 1,
Särkilahti, Eliisa, Valanne, Terho
doaj   +1 more source

Status of ash (Fraxinus spp.) in mixed hardwood post‐outbreak forests near the epicentre of the emerald ash borer invasion

Agricultural and Forest Entomology, EarlyView.
The persistence and health of ash populations were characterized in post‐outbreak forests near the epicentre of the emerald ash borer (EAB) invasion in North America. Regenerating ash remained abundant, but densities of understory ash were higher in wetlands (hydric), while ash remained at the seedling stage in riparian (mesic) and upland (xeric ...
Aaron Tayal, Kayla I. Perry
wiley   +1 more source

Late Holocene moisture variability in Arctic Alaska from chitin δ18O

Boreas, EarlyView.
Amplified warming in the Arctic has resulted in reduced sea‐ice extent, which can impact regional climate dynamics. Elucidating past moisture variability in response to changing temperatures and sea‐ice conditions can offer insight into how anthropogenic climate change may impact Arctic areas such as the Alaskan North Slope in the future. We contribute
Briana A. Edgerton, Melissa L. Chipman
wiley   +1 more source

Changing climates and environments within the complex Middle to Late Pleistocene fill of an overdeepened valley at Niederweningen, Switzerland

Boreas, EarlyView.
Glacially overdeepened valleys in the northern Alpine Foreland preserve Middle to Late Pleistocene sedimentary sequences that may serve as valuable archives for reconstructing past environmental changes in response to shifts in climate. This study presents a multidisciplinary analysis of two sediment cores from the overdeepened Wehntal Valley at ...
Johannes M. Miocic, Nigel Thew, Ruth Drescher‐Schneider, Hans Rudolf Graf, Marlu Kühn, Frank Preusser, Werner H. Schoch, Lucia Wick, Heinz Furrer   +8 more
wiley   +1 more source

Towards an ‘absolute’ timing of biostratigraphic and environmental phases from the Saalian late glacial to the Weichselian pleniglacial in central Europe—Insights from a lacustrine succession in Lichtenberg, northern Germany

Boreas, EarlyView.
Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein, Thomas Kasper, Alexis Badai Samudra, Martin Theuerkauf, Markus Lothar Fischer, Neda Rahimzadeh, Maria Sekar Proborukmi, Sonja Rigterink, Agnieszka Gruszczyńska, Christian Zeeden, Simon Parfitt, David John Horne, Lucy Roberts, Dustin White, Lisa Brogmus, Hans von Suchodoletz, Tobias Lauer, Marcel Weiss, David Colin Tanner, Brigitte Urban   +19 more
wiley   +1 more source

Holocene shoreline displacement and the impact of the Storegga tsunami on Hinnøya, northern Norway

Boreas, EarlyView.
The Holocene relative sea‐level (RSL) history of Norway's largest island, Hinnøya, has been investigated in detail, using sediment records from 25 isolation basins. The sediments were analysed for macrofossil and phytoplankton content, which served as the basis for identifying marine–lacustrine transitions, that is isolation contacts. Terrestrial plant
Anders Romundset, Kristian Vasskog, Martin Buran, Svein Olaf Dahl, Fredrik Høgaas, Mara Sternberg   +5 more
wiley   +1 more source

Palaeoenvironmental and climatic changes from the lateglacial of the Saalian to the Late Weichselian in central Poland: a multiproxy study from Józefów

Boreas, EarlyView.
Józefów site is a case study which provides a detailed record of environmental and climate changes and confirms the main traces of the landscape morphogenesis of the Late Pleistocene established in central‐eastern Europe. This study presents a multiproxy reconstruction of palaeoenvironment under variable climatic conditions from the retreat of the ...
Aleksandra Majecka, Jacek Forysiak, Ryszard Borówka, Andreas Börner, Łukasz Bujak, Leszek Marks, Radosław Mieszkowski, Piotr Moska, Daniel Okupny, Małgorzata Pisarska‐Jamroży, Renata Stachowicz‐Rybka, Krzysztof Stachowicz   +11 more
wiley   +1 more source

Sustained Clinical Improvement in Birch Pollen Allergy After Two Pre‐Seasonal Short Courses of Allergen‐Specific Immunotherapy: A Long‐Term Open‐Label Extension Study

Clinical &Experimental Allergy, EarlyView.
3 years follow‐up study to a DBPC dose‐finding trial investigating subcutaneous immunotherapy with T502 in birch‐pollen induced allergic rhinoconjunctivitis. 154 birch‐pollen allergic adults received short‐course treatment of 10,000 mTU/mL of T502 for 2 years and were observed during the next season without treatment.
Ralph Mösges, Friederike Hüffmeier, Ludger Klimek, Oliver Pfaar, Christian Neuhof, Anna Rybachuk, Cengizhan Acikel, Hacer Sahin, Silke Allekotte, Sandra del Pozo, José Luis Subiza, Miguel Casanovas, Mandy Cuevas, Laura Day, Lea Radtke, Esther Raskopf   +15 more
wiley   +1 more source

Environmental factors associated with variation in airborne pollen concentrations revealed by automated aerobiological measurements

Notulae Botanicae Horti Agrobotanici Cluj-Napoca
The impact of meteorological factors and air pollution on the dynamics of allergenic pollen dispersal was investigated in this study using automated monitoring data.
Aušrinė ŽUKAUSKAITĖ, Laura ŠUKIENĖ, Ingrida ŠAULIENĖ   +2 more
doaj   +1 more source