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Have we overemphasized the role of denitrification in aquatic ecosystems? A review of nitrate removal pathways
The removal of nitrogen (N) in aquatic ecosystems is of great interest because excessive nitrate in groundwater and surface water is a growing problem. High nitrate loading degrades water quality andExpand
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Stream denitrification across biomes and its response to anthropogenic nitrate loading
Anthropogenic addition of bioavailable nitrogen to the biosphere is increasing and terrestrial ecosystems are becoming increasingly nitrogen-saturated, causing more bioavailable nitrogen to enterExpand
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Nitrous oxide emission from denitrification in stream and river networks
Nitrous oxide (N2O) is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. Anthropogenic nitrogen (N) loading to river networks is a potentially importantExpand
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Inter-regional comparison of land-use effects on stream metabolism
SUMMARY 1. Rates of whole-system metabolism (production and respiration) are fundamental indicators of ecosystem structure and function. Although first-order, proximal controls are well understood,Expand
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A global perspective on wetland salinization: ecological consequences of a growing threat to freshwater wetlands
Salinization, a widespread threat to the structure and ecological functioning of inland and coastal wetlands, is currently occurring at an unprecedented rate and geographic scale. The causes ofExpand
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Restarting the conversation: Challenges at the interface between ecology and society
The exchange of information between researchers, resource managers, decision makers, and the general public has long been recognized as a critical need in environmental science. We examine theExpand
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The under-ice microbiome of seasonally frozen lakes
Compared to the well-studied open water of the ‘‘growing’’ season, under-ice conditions in lakes are characterized by low and rather constant temperature, slow water movements, limited lightExpand
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Beyond carbon and nitrogen: how the microbial energy economy couples elemental cycles in diverse ecosystems
Microbial metabolism couples elemental reactions, driving biogeochemical cycles. Assimilatory coupling of elemental cycles, such as the carbon (C), nitrogen (N), and phosphorus cycles, occurs whenExpand
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Soil O2 controls denitrification rates and N2O yield in a riparian wetland
[1] Wetland soil oxygen (O2) is rarely measured, which limits our understanding of a key regulator of nitrogen loss through denitrification. We asked: (1) How does soil [O2] vary in riparianExpand
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Nitrate removal in stream ecosystems measured by 15N addition experiments: Total uptake
We measured uptake length of 15NO { in 72 streams in eight regions across the United States and Puerto Rico to develop quantitative predictive models on controls of NO { uptake length. As part of theExpand
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