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By Gordon H. Orians

ISBN-10: 3642797555

ISBN-13: 9783642797552

ISBN-10: 3642797571

ISBN-13: 9783642797576

Although biologists have directed a lot consciousness to estimating the level and reasons of species losses, the implications for atmosphere functioning were little studied.
This e-book examines the effect of biodiversity on atmosphere approaches in tropical forests - some of the most species-rich and whilst such a lot endangered ecosystems in the world. It covers the relationships among biodiversity and first creation, secondary creation, biogeochemical cycles, soil techniques, flora types, responses to disturbance, and resistance to invasion. The analyses concentrate on the foremost ecological interfaces the place the lack of keystone species is probably to steer the speed and balance of surroundings processes.

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Many species are not necessarily better than few species for carrying out or maintaining a particular ecosystem process. Extensive evidence demonstrates that environmental conditions regulate biodiversity. Biodiversity varies predictably along elevational, disturbance, productivity, moisture, and latitudinal gradients (Huston, 1994). Although the diversity of many different taxa reaches a maximum in lowland tropical rain forests, the reasons for these diversity maxima vary significantly among taxa.

1990), and among lizards, the species with the greatest population density fluctuations yet observed is from a tropical forest (Andrews and Wright 1994). Remarkable population density fluctuations have also been observed among tropical forest plants. In just 3 years, population densities changed by more than 10% for 40% of the shrub and tree species encountered in a 50-ha plot of mature forest in Panama (Hubbell and Foster 1990). Population outbreaks of plant pests are an extreme form of population variability.

After Huston 1994) However, secondary production is not a simple function of primary production because plants have evolved a number of defensive strategies, including toxic chemicals, that deter herbivores, parasites, and pathogens from consuming plant material, and also prevent those organisms from efficiently utilizing the plant material that they do consume. Thus, not all of the energy and other resources contained in primary productivity are available to consumers. Secondary production and its relationship to primary productivity are extremely difficult to measure.

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Biodiversity and Ecosystem Processes in Tropical Forests by Gordon H. Orians

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