Abstract
Life of plants and animals is based on a constant flux of energy. This input of energy is used in me-tabolism, growth, and reproduction. From this perspective, individuals can be regarded as complex metabolic machines that process energy and materials. Green plants, which account for more than 99 percent of the total biomass present in the planet, fix a fraction of the electromagnetic solar radiation. This energy is stored in organic compounds of very high energy which, in turn, are the basis of the networks that maintain life on earth.
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Further Reading
Gracia, C. La gestión forestal y la conservación de los bosques en el marco de la Unión Europea: La necesidad de una nueva estrategia de los paÃses del Sur de la Unión. Amezaga, I.; Onaindia, M., eds.Conservación de la Biodiversidad. Cuadernos de Sección, Ciencias Naturales. Bilbao: Sociedad de Estudios Vascos; 1995:77–92.
Gracia, C.; Sabate, S. La resposta de la vegetació al foc: Els canvis en la estructura de la vegetació. Terradas, J., ed.Ecologia del Foc.Barcelona: Edicions Proa; 1996:162–172.
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Gracia, C.A. (1999). The Natural Systems: Potential Production and Forest Management. In: Golley, F.B., Bellot, J. (eds) Rural Planning from an Environmental Systems Perspective. Springer Series on Environmental Management. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-1448-9_8
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DOI: https://doi.org/10.1007/978-1-4612-1448-9_8
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