Global Nitrogen Cycle
The Nitrogen Cycle: Processes, Players, and Human Impact - Nature
Since the mid-1900s, humans have been exerting an ever-increasing impact on the global nitrogen cycle. Human activities, such as making fertilizers and ...
Global Nitrogen Cycle: Critical Enzymes, Organisms, and Processes ...
Here, we review the global biogeochemical cycle of N and its anthropogenic perturbation. We introduce important reservoirs and processes affecting N in the ...
The global nitrogen cycle in the twenty-first century - PMC
Global nitrogen fixation contributes 413 Tg of reactive nitrogen (Nr) to terrestrial and marine ecosystems annually of which anthropogenic activities are ...
The global nitrogen cycle in the twenty-first century - Journals
The global nitrogen cycle has been greatly modified by human activity, and among the key biogeochemical cycles on which ecosystems depend for ...
4 THE GLOBAL NITROGEN CYCLE - Princeton University
element, the global nitrogen cycle has been perturbed by anthropogenic activities. The rate of industrial nitrogen fixation now approximately equals the ...
Global Nitrogen: Cycling out of Control - PMC
We are altering the global nitrogen cycle, causing possible grave impacts on biodiversity, global warming, water quality, human health, and even the rate of ...
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, ...
Nitrogen - Understanding Global Change
The nitrogen cycle refers to the movement of nitrogen within and between the atmosphere, biosphere, hydrosphere and geosphere.
HUMAN ALTERATION OF THE GLOBAL NITROGEN CYCLE ...
Agriculture, combustion of fossil fuels, and other human activities have altered the global cycle of N substantially, generally increasing both ...
Effects of global change during the 21st century on the nitrogen cycle
The global nitrogen (N) cycle at the beginning of the 21st century has been shown to be strongly influenced by the inputs of reactive nitrogen (N r ) from ...
12.2: The global nitrogen cycle - Geosciences LibreTexts
Nitrogen enters the living world through nitrogen fixation (Figure 12.2.1−2, the process of converting nitrogen gas into ammonia (NH 3 ), which spontaneously ...
The global nitrogen cycle: changes and consequences - ScienceDirect
Human activities have resulted in the fixation of an additional ∼150 Tg N year −1 by energy production, fertilizer production, and cultivation of crops.
Human activities are greatly increasing the amount of nitrogen cycling between the living world and the soil, water, and atmosphere. In fact, humans have ...
Scientists' win-win solutions to global nitrogen crisis are good for the ...
The most comprehensive scientific review of the global nitrogen cycle has outlined 150 'win-win' measures to significantly reduce nitrogen ...
An Earth-system perspective of the global nitrogen cycle - Nature
An Earth-system perspective that investigates the dynamics of the nitrogen cycle in the context of a changing carbon cycle, a changing climate and changes in ...
HUMAN ALTERATION OF THE GLOBAL NITROGEN CYCLE
Key words: agriculture and the global N cycle; anthropogenic global change; biological diversity and the nitrogen cycle; ecosystem functioning, control by N; ...
The Global Nitrogen Cycle - NASA/ADS
In the intervening time the universe was formed, nitrogen was created, the Earth came into existence, and its atmosphere and oceans were formed!
Consequences of human modification of the global nitrogen cycle
We provide an overview of the impact of N r on the environment and human health, including an assessment of the magnitude of different environmental problems.
Disruption of the global nitrogen cycle: A grand challenge for the ...
Abstract. Disruption of the global nitrogen cycle by humans results primarily from activities associated with food and energy production. Since ...
(PDF) The Global Nitrogen Cycle in the Twenty-First Century
Abstract and Figures. Global nitrogen fixation contributes 413 Tg of reactive nitrogen (Nr) to terrestrial and marine ecosystems annually of ...