Summary
Determinations of energy and ash content were made on the organs of some common plant species from an elevational gradient in the Venezuelan páramos. The results indicate differences in energy content among the life forms sampled. Giant rosette plants show the highest values in the roots while woody plants have the highest energy content in the leaves. The reproductive organs show a higher energy content than the vegetative organs. There is a tendency to increase energy content as elevation and environmental stress increase. The adaptive significance of these patterns is discussed. The high average energy value for páramo plants, 20.18 KJ/g ash free dry weight, is similar to values reported for alpine tundra plants and conifer forests.
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References
Andersen DC, Armitage KB (1976) Caloric content of Rocky mountain subalpine and alpine plants. J Range Manage 29:344–345
Baruch Z (1979) Elevational differentiation in Espeletia schultzii (Compositae), a giant rosette plant, from the Venezuelan Pàramos. Ecology 60:85–98
Billings WD, Mooney HA (1968) The ecology of arctic and alpine plants. Biol Rev 43:481–529
Bliss LC (1962) Caloric and lipid content in alpine tundra plants. Ecology 43:753–757
Calero AG (1981) Patrones en la distribución de biomasa en dos especies vegetales de los Andes Venezolanos: Hypericum laricifolium Juess (Guttiferae) y Acaena cylindrostachya R. et P. (Rosaceae). Litentiate Thesis. Universidad Simón Bolivar. Caracas
Caspers N (1977) Seasonal variation of caloric values in herbaceous plants. Oecologia 26:379–383
Cuatrecasas J (1968) Páramo vegetation and its life forms. Colloquium Geographicum 9:163–186
Cuatrecasas J (1976) A new subtribe in the Heliantheae (Compositae): Espeletiinae. Phytologia 35:43–61
Darling M (1976) Interpretation of global differences in plant caloric values. Oecologia 23:127–139
Golley FB (1961) Energy values of ecological material. Ecology 42:581–584
Golley FB (1969) Caloric value of wet tropical forest vegetation. Ecology 50:517–519
Grime JP (1979) Plant strategies and vegetation processes. John Wiley. New York
Hadley EB and Bliss LC (1964) Energy relationships of alpine plants on Mt. Washington, New Hampshire. Ecol Monogr 34:331–357
Hedberg I and Hedberg O (1979) Iropical alpine life forms of vascular plants. Oikos 33:297–307
Jordan CF (1971) A world pattern in plant energetics. Am Sci 50:425–433
Larcher W (1980) Physiological Plant Ecology. 2nd. Edition. Springer-Verlag. Berlin
Lieth H (1975) The measurement of caloric values. pp: 119–130. In: Lieth H and Whittaker RH (eds): Primary productivity in the biosphere. Springer-Verlag. New York
Monasterio M (1980) Ed. Estudios Ecológicos en los Páramos Andinos. Ediciones de la Universidad de Los Andes. Mérida
Paine RT (1971) The measurement and application of the calorie to ecological problems. Ann Rev Ecol Syst 1:145–164
Parr Instruments Co (1975) Instructions for the 1241 and 1242 adiabatic calorimeters. Manual No 153. Moline, Illinois
Reiners WA and Reiners NM (1972) Comparison of oxygen bomb combustion with standard ignition techniques for determining total ash. Ecology 53:132–136
Singh JS and Yadava PS (1973) Caloric values of plant and insect species of a tropical grassland. Oikos 24:186–194
Vareschi V (1970) La Flora de los Pármos. Ediciones de Rectorado. Universidad de los Andes. Mérida
Verduin J (1972) Caloric content and available energy in plant matter. Ecology 53:982
Zachhuber K and Larcher W (1978) Energy contents of different alpine species of Saxifraga and Primula depending on their altitudinal distribution. Photosynthetica 12:436–439
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Baruch, Z. Patterns of energy content in plants from the venezuelan paramos. Oecologia 55, 47–52 (1982). https://doi.org/10.1007/BF00386717
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DOI: https://doi.org/10.1007/BF00386717