نتایج جستجو برای: nutrient cycling
تعداد نتایج: 98548 فیلتر نتایج به سال:
Most tree species predominantly associate with a single type of mycorrhizal fungi, which can differentially affect plant nutrient acquisition and biogeochemical cycling. Uncertainties in distributions are non-trivial, current estimates disagree up to 50% over 40% the land area, including tropical forests. Remote sensing capabilities for detection show promise refining these further. Here, we ad...
Anaplerosis: Replenishment or ‘filling up’ of the carbon pool in the tricarboxylic acid (TCA) cycle. The major anaplerotic reaction in the b-cell is catalyzed by pyruvate carboxylase that produces the 4 carbon TCA cycle intermediate oxaloacetate from pyruvate. Pyruvate metabolism catalyzed by pyruvate dehydrogenase that produces the 2 carbon TCA cycle intermediate acetyl-CoA is not anaplerotic ...
The North Wyke Farm Platform was established as a United Kingdom national capability for collaborative research, training and knowledge exchange in agro-environmental sciences. Its remit is to research agricultural productivity and ecosystem responses to different management practices for beef and sheep production in lowland grasslands. A system based on permanent pasture was implemented on thr...
South Chilean forest ecosystems represent one of the largest areas of old-growth temperate rainforests remaining in the Southern hemisphere and have a high ecological value, but suffer from deforestation, invasion by exotic species, fragmentation, and increasing atmospheric nitrogen (N) deposition. To support sustainable forest management, more knowledge is required on nutrient cycling of these...
Kraepelin was the first who recognized the phenomenon of cycling in bipolar disorder in 1913. The term rapid cycling was proposed by Dunner and Fieve in 1974. Later on, Kramlinger and Post defined ultra-rapid cycling and ultradian cycling in 1996. Frequent rapid mood switches are an inherent characteristic of bipolar disorder, and rapid cycling is included as a course specifier for bipolar diso...
Effects of past land use on spatial heterogeneity of soil nutrients in sourthern Appalachian forests
We examined patterns of nutrient heterogeneity in the mineral soil (0–15 cm depth) of 13 southern Appalachian forest stands in western North Carolina .60 yr after abandonment from pasture or timber harvest to investigate the long-term effects of land use on the spatial distribution and supply of soil resources. We measured soil carbon (C), nitrogen (N), acid-extractable phosphorus (P), potassiu...
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