Now showing items 11-20 of 970
(American Meteorological Society, 2010-04-15)
Corrigendum: Sokolov, A., and Coauthors, 2009: Probabilistic forecast for twenty-first-century climate based on uncertainties in emissions (without policy) and climate parameters. J. Climate, 22, 5175–5204.
uBioRSS : tracking taxonomic literature using RSS
(Oxford University Press, 2007-03-28)
Web content syndication through standard formats such as RSS and ATOM has become an increasingly popular mechanism for publishers, news sources, and blogs to disseminate regularly updated content. These standardized ...
Effects of ozone on net primary production and carbon sequestration in the conterminous United States using a biogeochemistry model
The effects of air pollution on vegetation may provide an important control on the carbon cycle that has not yet been widely considered. Prolonged exposure to high levels of ozone, in particular, has been observed to ...
Understanding calcium waves and sparks in central neurons
All cells use changes in intracellular calcium concentration [Ca2+]i to regulate cell signaling events In neurons, with their elaborate dendritic and axonal arborizations, there are clear examples of both localized and ...
Adjustment of forest ecosystem root respiration as temperature warms
Adjustment of ecosystem root respiration to warmer climatic conditions can alter the autotrophic portion of soil respiration and influence the amount of carbon available for biomass production. We examined 44 published ...
Eutrophication in Portuguese estuaries evidenced by δ15N of macrophytes
Terrestrial inputs of nitrogen in estuaries are increasing and altering salt marsh primary production, plant communities and associated biota. We used N isotope ratios and %N in Spartina maritima, Halimione portulacoides, ...
Species compositional differences on different-aged glacial landscapes drive contrasting responses of tundra to nutrient addition
In the northern foothills of the Brooks Range, Alaska, moist non-acidic tundra dominates more recently deglaciated upland landscapes, whereas moist acidic tundra dominates older upland landscapes. In previous studies, ...
Microbial community composition in sediments resists perturbation by nutrient enrichment
Functional redundancy in bacterial communities is expected to allow microbial assemblages to survive perturbation by allowing continuity in function despite compositional changes in communities. Recent evidence suggests, ...
The Arctic freshwater system : changes and impacts
(American Geophysical Union, 2007-11-20)
Dramatic changes have been observed in the Arctic over the last century. Many of these involve the storage and cycling of fresh water. On land, precipitation and river discharge, lake abundance and size, glacier area and ...
Microbes in nature are limited by carbon and energy : the starving-survival lifestyle in soil and consequences for estimating microbial rates
(Frontiers Media, 2013-11-12)
Understanding microbial transformations in soils is important for predicting future carbon sequestration and nutrient cycling. This review questions some methods of assessing one key microbial process, the uptake of labile ...