The logistic equation, with carrying capacity, K, and growth rate, r, has traditionally been used to describe dynamics of ecological populations.Experiments confirmed the prediction that dispersal could increase metapopulation abundance in heterogeneous environments, whereas they rejected environments support a larger than homogeneous same sum over K values.Consumer-resource models, which expli...

Nonnative plantations can effectively conserve soil and water improve the ecology environment, but desiccation occur may become severe in forest grass lands water-limited regions, leading to degradation, vegetation decline, crop failure. Therefore, it is necessary regulate changing relationship between plant growth water. However, there no universally accepted theory provide guidance sustainabl...

With growth the construction technologies, Cold-Formed Steel, CFS, sections are widely used in ordinary steel buildings because of some advantages such as light weight, ease of installation, decrease in cost, and increase in speed of operation. Using the bolted connections for CFS joist is one of the best details for steel structures. The main objective of this study is to conduct an experiment...

In this paper the concept of carrying capacity is investigated to provide an improved understanding about its contribution to solve environmental problems. Light is shed on its form, interpretation and application in biology, demography, applied and human ecology. The analysis begins with an examination of the bedrock of carrying capacity which is Malthus’ population theory, and its mathematica...