Results 61 to 70 of about 83,284 (295)
Land Degradation &Development, EarlyView.ABSTRACT Permafrost is rapidly degrading in the sporadic zone, including palsa mires in Scandinavia. Peatlands in the area have likely accumulated heavy metals from atmospheric deposition of industrial contaminants in the wider region. As the palsa mire chemical composition is not well known, and in other permafrost regions the permafrost thaw may ...
Joanna Katarzyna Jóźwik +7 more
wiley +1 more source
Plant phenology and seasonal nitrogen availability in Arctic snowbed communities [PDF]
, 2006 Thesis (M.S.) University of Alaska Fairbanks, 2006This study was part of the International Tundra Experiment (ITEX) and examined the effects of increased winter snow depth and decreased growing season length on the phenology of four arctic plant species (
Borner, Andrew P.
core
Neotropical Bird Migration During The Ice Ages: Orientation And Ecology [PDF]
, 1996 Reconstruction of breeding habitat of North American Neotropical migrants 18,000 years ago and 9,000 years ago indicated major shifts in both location and composition of plant communities relative to present conditions.
Webb, T., III +1 more
core +2 more sources
A Skin‐Changing Grass: Annual Bluegrass, Which Is Not so Annual
The Bulletin of the Ecological Society of America, EarlyView.
Agnieszka Rudak +2 more
wiley +1 more source
Nordic Journal of Botany, EarlyView.Pollen limitation, a decrease in seed production due to insufficient pollen receipt, may influence plant demography and the evolution of sexual systems. Its empirical estimation of pollen supplementation of some of the flowers on an individual is well known to be prone to overestimation due to potential resource reallocation among the individual's ...
Xia Jiang +6 more
wiley +1 more source
Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities [PDF]
, 2011 Part of Focus on Dynamics of Arctic and Sub-Arctic Vegetation Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude and alpine tundra ecosystems. Here, we (1)
Andreu-Hayles, Laia +31 more
core +3 more sources
Oikos, EarlyView.Grasslands, by definition, are dominated by graminoids. Nevertheless, forbs also make up a substantial part of vascular plant diversity in grasslands and are important resources of mammalian herbivores. However, forb recruitment is constrained by successful dominant graminoids, limiting access to safe sites for germination.
Gerardo Celis +5 more
wiley +1 more source
Dryas aeolian landforms in Arctic deflationary tundra, central Spitsbergen
Polish Polar Research, 2020 Aeolian activity is common on ice free areas in regions with permafrost occurrence. Sparse high-Arctic tundra vegetation, modifying surface air flow and sediments transport, influences the generation of individual landforms and their assemblages ...
Borysiak Janina +2 more
doaj +1 more source
Impacts of reindeer grazing on phosphorus sorption and nutrient availability in a tundra site
Oikos, EarlyView.Reindeer Rangifer tarandus, a large circumpolar herbivore, can influence whether nitrogen (N) or phosphorus (P) is the primary limiting nutrient in tundra plant communities. Specifically, findings from a site in northern Scandinavia suggest that under conditions where reindeer grazing stimulates inorganic N availability, grazing may drive ecosystems ...
Jerzy Szejgis +5 more
wiley +1 more source
Лесной журналThe article examines the features of the anatomical structure of the hydraulic system of 17 species from 13 genera of 6 families of woody flowering plants, which belong to different tiers of the floodplain forest growing along the Enmyvaam River ...
Evgenia S. Chavchavadze +3 more
doaj +1 more source