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- Primary producers including phytoplankton and other microorganisms consume and transform it into organic molecules to build biomass, while others transform inorganic forms to access their chemical store of energy. All of these steps are part of the complex nitrogen cycle of the upper water column.
news.mit.edu/2018/understanding-microbial-competition-for-nitrogen-0410
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The transformation of nitrogen into its many oxidation states is key to productivity in the biosphere and is highly dependent on the activities of a diverse assemblage of microorganisms, such...
- Biological Nitrogen Fixation
Increased loads of nitrogen fertilizer to freshwater, as...
- The Conservation of Mass
Living organisms are primarily made of six elements: oxygen,...
- Biodiversity and Ecosystem Stability
The Nitrogen Cycle: Processes, Players, and Human Impact....
- Food Web: Concept and Applications
Food web is an important conceptual tool for illustrating...
- Biodiversity and Ecosystem Services
Service type : Goods or services provided: Provisional:...
- The Ecology of Carrion Decomposition
Nutrients diffuse from the carrion into the soil resulting...
- Secondary Production, Quantitative Food Webs, and Trophic Position
Secondary production of species in multi-species assemblages...
- Rivers and Streams: Life in Flowing Water
Periphyton: The community of primary producers and...
- Biological Nitrogen Fixation
Feb 5, 2018 · Microbial nitrogen-transforming networks both attenuate and exacerbate human-induced global change. They produce and consume the powerful greenhouse gas nitrous oxide, lead to eutrophication...
- Marcel M. M. Kuypers, Hannah K. Marchant, Boran Kartal
- 2018
May 20, 2024 · This review presents a summary of the microbial nitrogen transformation, including the respective isotope effects of nitrogen and oxygen on different nitrogen-bearing compounds (including nitrates, nitrites, ammonia and nitrous oxide), and the microbiological characteristics of these processes.
Feb 8, 2016 · Here, we outline the major microbial processes of the nitrogen cycle, the microorganisms that perform nitrogen transformations, and the modularity and evolutionary history of the nitrogen cycle, and provide a perspective of this cycle, now and into the future.
- Lisa Y. Stein, Martin G. Klotz, Martin G. Klotz
- 2016
Apr 16, 2024 · Excess fertilizer use and subsequent runoff contributes to eutrophication of waterways and emissions of greenhouse gases, namely nitrous oxide. While humans have radically changed the N cycle in the Anthropocene, it was single-celled microorganisms that established the nitrogen cycle and its enzymatic processes over Earth’s history .
Jan 1, 2021 · Nitrogen is present in various forms (Table 15.1)—primarily as dinitrogen gas, organic nitrogen (in plants, animals, and soil organic matter), and ammonium (NH 4 +) and nitrate ions. Microbially mediated processes transform nitrogen from one form to another.
Nov 1, 2022 · Microorganisms transform nitrogen through a series of redox reactions. Atmospheric nitrogen enters the cycle as N 2 and is reduced to ammonia (NH 3) by diazotrophs, which protonates to ammonium (green arrow). Ammonium is oxidized to nitrate (light orange arrow).
