According to metapopulation theory, the capacity of a habitat patch network to support the persistence of a species is measured by the metapopulation capacity of the patch network. Mathematically, metapopulation capacity is given by the leading eigenvalue kM of an appropriately constructed non-negative n n matrix M, where n is the number of habitat patches. Both habitat destruction (in the sens...

Ornamental geophytes (ornamental flower bulbs) are international and national heritage considering their contribution to people's life quality around the world. Iranian habitats support about 8000 species of flowering plants (belonging to 167 families and 100 genera) of which almost 1700 are endemic. Iran is a rich country in terms of distribution of bulbous plants. More than 200 species of bul...

1. We take a previously studied model for two species one of which is competitively inferior coexisting in a patchy environment, and examine the effects of removing patches (that is, of decreasing the amount of available habitat). 2. Habitat destruction or patch removal reduces the number (and proportion) of patches occupied by the superior competitor, but can result in an increase in the total...

proceeds, some species may be driven to extinction only Loss of habitat due to human activities is a major threat to reestablish in the community following more extensive to biological diversity (Ehrlich and Ehrlich 1981; Wilson habitat destruction that drives more competitive species 1988). Recent models of competition among sessile orto extinction. Thus, the models of Tilman et al. (1994, gan...

Orangutans are endangered primates that live in Asian forests. Each year, these forests becoming more stressful to because of habitat destruction and deforestation. The stress change may affect some orangutans than others. As male age, them grow big cheek pads on their faces, called flanges (flanged males), while others keep kid faces (unflanged males). Scientists still do not understand why up...

Habitat destruction is the most important factor determining species extinction; hence, the management of wildlife populations necessitates the management of habitats. Habitat suitability modeling is one of the best tools used for habitat management. There are several methods for habitat suitability modeling, with each of having  some different advantages and disadvantages. In this study, we us...