nutrient cycle

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nutrient cycle

the passage of a nutrient through an ECOSYSTEM so that it eventually becomes reavailable to the PRIMARY PRODUCERS.
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Plant impact on the biogeochemical cycle of silicon and related weathering processes.
"Our interpretation of a number of other isotopic systems, and of changes to biogeochemical cycles since the last glacial maximum therefore likely needs re-evaluating."
1st position was won by model on biogeochemical cycles designed by group no 5 that consisted of Aroona Ejaz, Rushda Tariq, Aimon Khursheed and Ayesha Rahat.
Science and technology have also allowed us to manipulate agriculture beyond our current understanding, for example by altering biogeochemical cycles (by short-circuiting the nitrogen cycle) and by intervening in ecological processes (by applying pesticides).
There is also background on biogeochemical cycles, environmental chemistry, and green chemistry.
In a paper published in Global Biogeochemical Cycles, (1) Dr Canadell and his co-authors concluded from modelling studies that frozen high-latitude soils contain vast quantities of carbon, about twice as much carbon as is currently in the atmosphere, and that destabilisation of this frozen 'carbon pool' could influence carbon-climate feedbacks.
He lists his main research interests as stratospheric and tropospheric chemistry, and their role in the biogeochemical cycles and climate.
The applications of Kiene's research have advanced our understanding of microbial food webs, biogeochemical cycles, and how microorganisms in the ocean can affect atmospheric chemistry and ultimately global climate.
Most ecologists, I would guess, would exclude rocks from this kind of participation, and I believe it would be a mistake to claim that concepts like biogeochemical cycles show that ecologists have the same concept of the "web of life" as most indigenous peoples might use the phrase.
Thus, they control global utilization of nitrogen through nitrogen fixation, nitrification, and nitrate reduction; and they drive the bulk of carbon, sulfur, iron, and manganese biogeochemical cycles. At higher trophic levels, rarely studied bacterial mutualists provide essential nutrients and other compounds to diverse plant and animal hosts, and thus have a pervasive impact on the distribution, productivity, and diversification of multicellular organisms.
In this regard, measurements of light stable isotopes in carbon dioxide, methane, and other atmospheric trace gases provide a unique means to better understand their sources, fates, and contributions in biogeochemical cycles. This collaboration already has resulted in the tangible improvement of the measurement tools used by hundreds of international research groups, and improved the value assignments of isotope reference materials distributed by NIST and the International Atomic Energy Agency (IAEA).
Langen-felds of the Commonwealth Scientific and Industrial Research Organisation in Aspendale, Australia, and his colleagues in the Fall Global Biogeochemical Cycles.