Sentences with phrase «abiotic processes»

How abiotic processes, biotic processes, and their interactions sustain habitat characteristics and functions in river channels and floodplains: An investigation of the response of a gravel - bed reach of the Merced River to restoration (CalFed: $ 1,400,000).

More generally, stromatolitic laminate structures themselves as well as the putative cellular structures and molecular signatures they sometimes contain have been and remain controversial, since they can be explained by either biogenic or abiotic processes (Grotzinger, 1999).

Mechanisms of Methyl Mercury Net Degradation in Alder Swamps: The Role of Methanogens and Abiotic Processes — Rose - Marie Kronberg — Environmental Science & Technology Letters

The morphologies of the tubules are inconsistent with known mineralogical crystallization mechanisms, and combined with evidence of organic molecules suggest that these tubules can not be formed through purely abiotic processes.

These findings suggest that historical milking grounds represent an alternative stable state, maintained by a number of processes, including increased nutrient cycling rates, soil biotic and abiotic processes, and selective feeding on shrubs by lemmings and voles, which prevent the surrounding vegetation from invading in the historical milking grounds.

Life must channel and use energy much more quickly than abiotic processes in order to be alive, and that's what we're looking for: something that markedly distinguishes life from nonlife by how much energy it seems to be using.

Abiotic process — primarily SGD fluxes — controlled the carbonate chemistry adjacent to the primary SGD vent site, with nutrient - laden freshwater decreasing pH levels and favoring undersaturated aragonite saturation (Ωarag) conditions.

Not exact matches

Further calculations by Catling and his team conclude that no abiotic methane sources on a rocky planet could produce enough of the gas to counteract this process — whether it is volcanic outgassing from a planet's interior, chemical reactions in hydrothermal vents, even asteroid impacts.

This suggests that the changes were caused by biological processes rather than by abiotic differences in, for example weather conditions.

They were looking for a site with a venting process that produces a lot of hydrogen because of the potential it holds for the chemical, or abiotic, creation of organic molecules like methane — possible precursors to the prebiotic compounds from which life on Earth emerged.

Their research further reveals that another organic abiotic compound is formed during the vent circulation process at adjacent lower temperature, higher pH vents, but reaction rates are too slow to completely reduce the carbon all the way to methane.

Abiotic sources such as industrial processes are comparatively minor.

The Slovenian Society of Plant Biology (former Slovenian Society of Plant Physiology) has been active since 1982 as voluntary scientific and professional association gathering researchers who investigate physiological processes in plants, and interactions of plants with their biotic and abiotic environments.

The study authors also wrote that they couldn't rule out the possibility that these tiny fossils are the result of abiotic (or nonliving) processes.

Bottom - up processes are generally driven by the abiotic conditions required for primary producers to grow, such as availability of light and nutrients, and the subsequent transfer of energy to consumers at higher trophic levels.

This comes from a complete misunderstanding of ecology and the roles played by various abiotic factors in driving different processes over variable scales of space and time.