Results 211 to 220 of about 87,245 (261)
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Production, assimilation and accumulation of organic matter in ecosystems
Journal of Theoretical Biology, 1974Abstract Current equations for energy flow through populations and ecosystems use the term net production for two distinct concepts: (1) the rate at which new organic matter is produced after providing for maintenance, and (2) the rate at which the standing crop of organic matter changes.
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The Accumulation of Organic Matter in Arid Zones
1967In humid regions the deposition of organic matter is widespread, both on the continents as coal, and in marine basins as oil shales. By contrast, in arid regions forests give way to steppes, and farther within the arid region even the continuous grass cover disappears, leaving only a poor, thin flora, or even in large areas no flora at all. (see Vol. 2,
N. M. Strakhov +2 more
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Production and Accumulation of Organic Matter The Organic Carbon Cycle
1978Production, accumulation and preservation of undegraded organic matter are prerequisites for the existence of petroleum source rocks. The term “organic matter” or “organic material”, as used in this book, refers solely to material comprised of organic molecules in monomeric or polymeric form derived directly or indirectly from the organic part of ...
Bernard P. Tissot, Dietrich H. Welte
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Phosphorus control of soil organic matter accumulation and cycling
Biogeochemistry, 1988The present level of understanding of P controls on organic matter accumulation and cycling in a pedological context owes much to soil sequence studies, and the hypotheses that emerged from them to explain the variation of P compounds with soil type and development.
K. R. Tate, I. Salcedo
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Organic Matter Accumulation Records in Lake Sediments
1995The organic-matter content of lake sediments provides information that is important to studies of lacustrine paleoenvironments, the history of climate change, and the effects of humans on local and regional ecosystems. Sediment organic matter yields a record of its sources from biota of the past in its elemental, isotopic, and molecular composition ...
P. A. Meyers, R. Ishiwatari
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Organic matter accumulation post‐mineral sands mining
Soil Use and Management, 2013Abstract Soil development and organic matter ( OM ) accumulation are vital for sustainability in reclaimed prime farmlands following mineral sands mining. Additionally, the effectiveness of soil reconstruction techniques on soil development greatly influences crop ...
A. F. Wick +3 more
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Accumulation behaviors of methane in the aqueous environment with organic matters
Fuel, 2019Abstract Shale gas has received extensive attention and is becoming an important supplement to worldwide energy. Water is inevitable when developing shale gas with hydraulic fracturing. Thus it is necessary to understand the dynamic behavior of methane in water environments.
Zheng Li +7 more
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Addition, Decomposition and Accumulation of Organic Matter in Forests
The Journal of Ecology, 1968Organic matter annually added to the soil will be submitted to a process of decomposition. The added quantity and the rate of decomposition will in the end lead to a smaller or larger accumulation of humoid compounds. It is difficult to give a quantitative gravimetric picture of this phenomenon, because of the simultaneous processes of mineralization ...
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Exploring the role of organic matter accumulation on delta evolution
Journal of Geophysical Research: Earth Surface, 2012We explore the role of plant matter accumulation in the sediment column in determining the response of fluvial‐deltas to base‐level rise and simple subsidence profiles. Making the assumption that delta building processes operate to preserve the geometry of the delta plain, we model organic sedimentation in terms of the plant matter accumulation and ...
Jorge Lorenzo‐Trueba +4 more
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Organic matter accumulation in a series of Eucalyptus grandis plantations
Forest Ecology and Management, 1986Abstract The biomass and net productivity of a series of stands in Eucalyptus grandis plantations on the north coast of New South Wales were studied. The stands were of various ages but soil nutrient differences did not allow them to be directly considered as a chronosequence.
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