RIGHT CLICK ON THE SCHEME TO SEE THE OPTIMIZED IMAGE
In the scheme above these lines, the base level which corresponds to the Producers displays Net Primary Production (NPP) of 1%; nevertheless, in recent studies scientists have observed that the NPP has been increased by 1.2% in the last 23 years (Nemani et al. 2003) (Wielicki et al. 2002); as a result, the amount of energy captured by the photosynthetic organisms is 25776.8 Kcal/m^2 per year; that is an increase in the NPP of 305.6532 Kcal/m^2 per year. This gives a demonstration of how a small increase of the incident solar irradiation on the biosphere can lead to enormous beneficial increase in the energy available in the food chain.
The aforementioned studies demonstrate that the cause of the increase of NPP is the climate change derived from small increases in the intensity of solar radiation penetrating the atmosphere in its way onto the biosphere. (Nemani et al. 2003) (Wielicki et al. 2002).
REFERENCES AND BIBLIOGRAPHY
Bruce A. Wielicki, Takmeng Wong, Richard P. Allan, Anthony Slingo, Jeffrey T. Kiehl, Brian J. Soden, C. T. Gordon, Alvin J. Miller, Shi-Keng Yang, David A. Randall, Franklin Robertson, Joel Susskind, Herbert Jacobowitz. Evidence for Large Decadal Variability in the Tropical Mean Radiative Energy Budget. Science, 1 February 2002: Vol. 295. No. 5556, pp. 841 - 844. DOI: 10.1126/science.1065837
Curtis, Helen. Biology. 1983. Worth Publishers, Inc., New York, New York.
Guth, Alan H. The Inflationary Universe: The Quest for a New Theory of Cosmic Origins. Perseus Books Group, 1999, New York, New York. Pp. 29-31.
Odum, Eugene P. and Barrel, Gary W. Fundamentos de Ecología-Quinta Edición.2006. International Thompson Editores, S. A. de C. V. México, Distrito Federal.
Sutton, David B., Harmon, N. Paul. Ecology: Selected Concepts. 2000. John Wiley & Sons, Inc. New York.