Sentences with phrase «nitrogen fixation from»

The study was part of the Hawaii Ocean Time - series Program More about nitrogen fixation from the National Research Council

Not exact matches

«It has been established that the nitrates, which is a form of nitrogen, comes from fixation of atmospheric diatomic nitrogen in the atmosphere during meteorite impacts, which is consistent with the data that we obtained through the SAM analyses, so this may be the main source of fixed nitrogen on Mars,» says Javier Martín - Torres.

And it is known that fixation of nitrogen from the air is in the tundra to a high degree performed by cyanobacteria associated with mosses.

Fixation processes free up nitrogen atoms from their diatomic form to be used in other ways, but nitrogen does not easily react with other chemicals to form new compounds.

Thus, in addition to the so - called «Haber - Bosch process of nitrogen fixation,» nitrogenase also stimulates a reaction corresponding to the «Fischer - Tropsch synthesis of hydrocarbons,» which can be used on a large scale to synthesize fuels, for instance from industrial waste gases..

Some, however, plow through the night, converting nitrogen from the air into usable nutrients — a process known as nitrogen fixation.

Their analysis, which could discern human - derived nitrogen from natural nitrogen fixation, revealed that the oceanic nitrate concentration increased significantly over the last 30 years in surface waters of the North Pacific due largely to the enhanced deposition of nitrogen from the atmosphere.

And if the cyanobacteria are growing in water short on iron, an essential nutrient for them, the slowdown in nitrogen fixation can overwhelm any positive growth effects from extra CO2.

Marilyn Roossinck of Pennsylvania State University, University Park, spoke with Sarah Crespi about the diversity of roles that viruses take on in ecological systems, from protecting plants from drought to moderating nitrogen fixation.

Key climate - relevant biogeochemical processes such as calcification, primary production and nitrogen fixation are investigated using a large array of techniques, ranging from molecular tools to physiological and ecological approaches.

Possible mechanisms include (iv) fertilization of phytoplankton growth in the Southern Ocean by increased deposition of iron - containing dust from the atmosphere after being carried by winds from colder, drier continental areas, and a subsequent redistribution of limiting nutrients; (v) an increase in the whole ocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient exported.

Diazotroph diversity and nitrogen fixation in the coral Stylophora pistillata from the Great Barrier Reef — Michael P. Lesser — The ISME Journal

«Then the bug pulls nitrogen from the air and uses the bioplastic, which is basically stored hydrogen, to drive the fixation cycle to make ammonia for fertilizing crops.»