cycle

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cycle

noun age, alternation, circle, circuit, consecution, course, eon, epoch, era, flow, period, recurrence, recurring period, regular return, regglarity of recurrence, repetitiveness, revolution, rotation, round, sequence, succession
See also: annum, frequency, life, sequence, succession
References in periodicals archive ?
These changes have the ability to interfere with the nitrogen cycle of the Amazon basin in several ways.
Figure 12-4 shows the nitrogen cycle as it operates on modern farms that raise both crops and animals.
Sheley says it's also possible to restore the nitrogen cycle by bringing back the natural plants.
Ecologist Peter Vitousek and others have argued that humans have greatly altered the global nitrogen cycle.
Non-mycorrhizal uptake of amino acids by roots of the alpine sedge Kobresia myosuroides: implications for the alpine nitrogen cycle.
For example, he says, researchers at the Harvard Forest LTER station in Massachusetts have shown that dramatic disturbances, such as hurricanes, may have little long-term effect, whereas subtle, human-induced changes in the nitrogen cycle are altering the basic ecosystem processes in the forest.
This large-scale intervention in the nitrogen cycle is already seriously altering ecosystems around the world, according to a panel of ecologists chaired by Stanford University's Peter Vitousek.
Instrument Will Give Scientists Deeper Insight into Links Between Agricultural Practices, Climate Change and the Global Nitrogen Cycle
Rodriguez has collaborated with VeBes O&M a wastewater treatment plant operating and maintenance company to develop a mathematical model of the microbial metabolisms involved in the nitrogen cycle and the impact of high temperature and salinity on their performance in order to identify opportunities for a smaller energy footprint treatment operation.
Various microbial groups involved in the nitrogen cycle have been extensively studied in recent decades (Purkhold et al.