Results 41 to 50 of about 73,746 (281)

Vegetation responses to interglacial warming in the Arctic: examples from Lake El'gygytgyn, Far East Russian Arctic [PDF]

open access: yesClimate of the Past, 2013
Preliminary analyses of Lake El'gygytgyn sediment indicate a wide range of ecosystem responses to warmer than present climates. While palynological work describing all interglacial vegetation is ongoing, sufficient data exist to compare recent warm ...
A. V. Lozhkin, P. M. Anderson
doaj   +1 more source

Impacts of large herbivores on mycorrhizal fungal communities across the Arctic

open access: yesEcography, EarlyView.
Mycorrhizal fungi play an integral role in nutrient and carbon cycling in soils, which may be especially important in the Arctic, one of the world's most soil carbon‐rich regions. Large mammalian herbivores can influence these fungi through their impacts on vegetation and soil conditions, however the strength and prevalence of these interactions in the
Cole G. Brachmann   +25 more
wiley   +1 more source

Phyllogenesis of genus Betula L. according to the paleobotanic data

open access: yesІнтродукція Рослин, 2001
On a grounds of analysis of the paleobotanic investigations a wide prevalent of the genus Betula in time of previous geological periods is discovered. The development of the genus Betula began in top chalk period and lower eocensis.
L.I. Parkhomenko
doaj   +1 more source

The complete chloroplast genome of Betula costata (Betulaceae)

open access: yesMitochondrial DNA. Part B. Resources, 2020
In the present study, we analyzed the complete chloroplast genome sequence of Betula costata using the Ion Torrent platform. The chloroplast genome of B.
Min Woo Lee   +3 more
doaj   +1 more source

The Immunological Correlation With Adenoid Hypertrophy and Allergic Rhinitis in Children

open access: yesiNew Medicine, EarlyView.
The imbalance of Th1/Th2 and Th17/Treg cells in allergen and inflammatory responses might be associated with the development of adenoid hypertrophy, suggesting that allergic rhinitis maybe the risk factor of AH and providing a potential alternative explanation for adenoid hypertrophy pathogenesis.
Yang Song   +4 more
wiley   +1 more source

Geographical distribution of Betula humilis Schrank in Ukraine

open access: yesІнтродукція Рослин, 2004
The map of Betula humilis Schrank distribution was formed as a result of the analysis of herbarium samples and literature data. The regressive changes in the area of the species are determined.
V.I. Melnik, L.A. Savchuk
doaj   +1 more source

Impact of Tree Pollen Distribution on Allergic Diseases in Serbia: Evidence of Implementation of Allergen Immunotherapy to Betula verrucosa

open access: yesMedicina, 2020
Background and objectives: The relationship between air pollen quantity and the sensitization of allergic patients is crucial for both the diagnosis and treatment of allergic diseases.
Rajna Minić   +8 more
doaj   +1 more source

Foodplant Processing Adaptations in Four \u3ci\u3eHyalophora\u3c/i\u3e Species (Lepidoptera: Saturniidae): Regional and Taxonomic Specialization [PDF]

open access: yes, 2017
To determine whether local populations of four Hyalophora species (Lepidoptera: Satumiidae) had improved survival or were physiologically adapted for rapid and/or efficient growth on their local hosts, a series of larval feeding studies were conducted ...
Grabstein, Eric, Scriber, J. Mark
core   +2 more sources

Holocene palaeoenvironmental reconstruction of sea level, coastal and vegetation changes along the southern Solway Firth, United Kingdom

open access: yesJournal of Quaternary Science, EarlyView.
Abstract Holocene relative sea level (RSL) changes were reconstructed from four sites along the less‐studied southern Solway Firth. A multiproxy approach, including lithostratigraphical and biostratigraphical analyses, combined with radiocarbon dating, produced ten sea level index points (SLIPs).
Dayang Siti Maryam Binti Mohd Hanan   +3 more
wiley   +1 more source

Introgression between Betula tianshanica and Betula microphylla and its implications for conservation

open access: yesPlants, People, Planet, 2021
Societal Impact Statement In rapidly changing environments species conservation can be hindered by uncertainties in distinguishing closely related species.
Junyi Ding   +7 more
doaj   +1 more source

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