Ecology: the Biology of Interactions. 2.06. The Biogeochemical Cycle of Carbon
Naturally, discussion of the characteristics of the biogeochemical cycles of several key elements should begin with carbon. Carbon is the basis of organic compounds, and therefore the carbon cycle is of particular importance for living organisms. The most important feature of this cycle is the presence of carbon dioxide...
Ukrainian language (latest version) / Russian language (updates discontinued) 2.05. Energy Sources for BGC Cycles
D. Shabanov, M. Kravchenko. Ecology: the Biology of Interactions Chapter 2. Biospherology
2.07. The Biogeochemical Cycle of Nitrogen
2.07. Biogeochemical cycle of nitrogen
2.06. The Biogeochemical Cycle of Carbon Consideration of the characteristics of the BGC cycles of several key elements should naturally begin with carbon (Fig. 2.6.1). Carbon is the basis of organic compounds, and therefore the carbon cycle is of particular importance for living organisms. The most important feature of this cycle is the presence of reserves of CO2, carbon dioxide, in the atmosphere, from which living organisms can draw it. The movement of carbon through living organisms is closely linked to the movement of other biogens. For example, the ratio of carbon and nitrogen fluxes through living matter is about 6:1 (six carbon atoms per one nitrogen atom), and the ratio of carbon and phosphorus fluxes is about 100:1. Naturally, this reflects the ratios of the elements themselves in living matter. [IMG_1] Fig. 2.6.1. The global carbon cycle. Numbers are millions of billions of grams (10^15 g); for pools, average values; for fluxes, per year Industrial emissions of carbon monoxide (CO) into the atmosphere are equal to, or even exceed, its natural input. The special significance of the carbon cycle is connected with its influence on climate. Carbon dioxide and methane are the most important greenhouse gases (see sections 5.15 and 6.09). CH4 stabilizes the ozone layer and is an important greenhouse gas. Methane is released by marshes and shallow waters, as well as by intestinal endosymbionts of ruminants. Methods of controlling them using antibiotics are now being developed. The result of such control is an increase in live-mass gain and a reduction of the greenhouse effect in the atmosphere (that is, to some extent, a slowing of global warming). Ukrainian / Russian 2.05. Energy Sources for BGC Cycles
D. Shabanov, M. Kravchenko. Ecology: the Biology of Interactions Chapter 2. Biospherology
2.07. The Biogeochemical Cycle of Nitrogen
2.07. Biogeochemical cycle of nitrogen