Browsing by Subject "Nitrogen"
Now showing items 1-12 of 12
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Assessing Nutrient Retention of Restored Wetlands in North Carolina
(2019-04-25)Wetlands are among the most productive and dynamic ecosystems in the world; biogeochemical cycling and storage processes are crucial for nutrient retention in wetland systems. This study aims to test if restored wetlands ... -
Connectivity Drives Function: Carbon and Nitrogen Dynamics in a Floodplain-Aquifer Ecosystem
(2012)Rivers interact with their valleys from headwaters to mouth, but nowhere as dynamically as in their floodplains. Rivers deliver water, sediments, and solutes onto the floodplain land surface, and the land in turn supplies ... -
Contingency in ecosystem but not plant community response to multiple global change factors
(New Phytologist, 2012)Community and ecosystem responses to global environmental change are contingent on the magnitude of change and interacting global change factors. To reveal whether responses are also contingent on the magnitude ... -
Differential nutrient limitation of soil microbial biomass and metabolic quotients (qCO2): is there a biological stoichiometry of soil microbes?
(PLoS One, 2013)BACKGROUND: Variation in microbial metabolism poses one of the greatest current uncertainties in models of global carbon cycling, and is particularly poorly understood in soils. Biological Stoichiometry theory describes ... -
Environmental and genetic determinants of colony morphology in yeast.
(PLoS Genet, 2010-01-22)Nutrient stresses trigger a variety of developmental switches in the budding yeast Saccharomyces cerevisiae. One of the least understood of such responses is the development of complex colony morphology, characterized by ... -
ESTIMATES OF FACTORS DIRECTLY RELATED TO FINE ROOT LONGEVITY USING A HIERARCHICAL BAYESIAN MODEL
(2008-08-29)Fine root longevity, measured using minirhizotrons, range from days to years (Hendrick & Pregitzer, 1992; Eissenstat et al., 2000). Although there are several hypotheses that relate to root tissue lifespan (Ryser, 1996), ... -
Global nitrogen budgets in cereals: A 50-year assessment for maize, rice, and wheat production systems.
(Scientific reports, 2016-01-18)Industrially produced N-fertilizer is essential to the production of cereals that supports current and projected human populations. We constructed a top-down global N budget for maize, rice, and wheat for a 50-year period ... -
Is there foul play in the leaf pocket? The metagenome of floating fern Azolla reveals endophytes that do not fix N2 but may denitrify.
(The New phytologist, 2018-01)Dinitrogen fixation by Nostoc azollae residing in specialized leaf pockets supports prolific growth of the floating fern Azolla filiculoides. To evaluate contributions by further microorganisms, the A. filiculoides microbiome ... -
Plant species' origin predicts dominance and response to nutrient enrichment and herbivores in global grasslands.
(Nat Commun, 2015-07-15)Exotic species dominate many communities; however the functional significance of species' biogeographic origin remains highly contentious. This debate is fuelled in part by the lack of globally replicated, systematic data ... -
Surficial gains and subsoil losses of soil carbon and nitrogen during secondary forest development.
(Global change biology, 2015-02)Reforestation of formerly cultivated land is widely understood to accumulate above- and belowground detrital organic matter pools, including soil organic matter. However, during 40 years of study of reforestation in the ... -
The role of reactive oxygen and nitrogen species in the response of airway epithelium to particulates.
(Environ Health Perspect, 1997-09)Epidemiologic and occupational studies indicate adverse health effects due to inhalation of particulate air pollutants, but precise biologic mechanisms responsible have yet to be fully established. The tracheobronchial epithelium ... -
Understanding Effects of Anthropogenic Activities on Element Cycling in Temperate Forest Watersheds
(2011)Human activities are increasingly altering the ways in which energy and elements cycle within and move between ecosystems. Through fossil fuel combustion and the use of synthetic fertilizers we continue to expose much of ...
