Tropical Rain Forest Soils of La Selva Essay -- Ecology Wildlife Natur

equatorial Rain Forest Soils of La SelvaTropical rain forests across the globe are currently threatened by massive deforestation for logging, grazing, and cultivation (Otzen 1993). Such land-use practices alter temperature regimes (Fernandes and Sanford 1995) as salutary as ground, kingdom, and surface water, flora, fauna, and microorganisms (Otzen 1993). These changes whitethorn result in a outlet of soil constitutive(a) matter, a decrease in soil fruitfulness (Garcia-Oliva et al. 1994, Tissen et al. 1994), severe soil erosion (Otzen 1993), and changes in soil structure and chemical science (Fernandes and Sanford 1995, Sollins et al. 1995, Montgagnini and Sancho 1994.) The response of tropical rain forest soils to deforestation depends upon the specific properties of the soils as well as the type of use they are subject to. La Selva Biological Station, located in north-central Costa Rica and containing a mixture of pasture, second growth, and intact forest, provides an excell ent opportunity to study the do of deforestation on examples of three soil orders--Entisols, Inceptisols, and Ultisols. Although limited studies have been conducted on the impact of deforestation on soils in this area, a knowledge of their properties may help predict the nature of the changes that would occur due to deforestation. Such changes provide determine whether or not rejuvenation of the rain forest is possible. altogether soils at La Selva are derived from volcanic parent corporeal. This material came primarily from eroded lava flows, although some material was carried in lahars. At higher(prenominal) elevations, soil parent material consists of lava weathered in place. Both alluvial and colluvial deposits cover the lower elevations, however, which include river terraces of various ages. Mos... ...s Biogeochemistry (Dordrecht) 6 181-89. Sollins P., Sancho, Freddy, Mata, Rafael, Sanford, Robert L. Jr., 1994, Soils and soil put to work research, pages 34-53 in McDade, L . A. K.S. Bawa H.A. Hespenheide and G.S. Hartshorn (eds.), La Selva ecology and Natural History of a Neotropical Rain Forest Chicago, University of Chicago Press, 486 p.Tidall, J.M. and J.M. Oades, 1982, Organic matter and water-stable aggregates in soil Journal of Soil Science 33 141-63. Tissen, H., E. Cuevas, P. Chacon. 1994. The role of soil organic matter in sustaining soil fertility. Nature 371 783-785.Uehara, G. and G. Gillman, 1981, The Mineralogy, Chemistry, and Physics of Tropical Soils with changeable Charge Clays Boulder, Colorado, Westview press. Vitousek, P.M. 1984. Litterfall nutrients cycling and nutrient limitation in tropical forests. Ecology 65 285-298.