LIFESCI 1 Chapter Notes - Chapter 47: Competitive Exclusion Principle, Keystone Species, Trophic Level
Document Summary
The niche is a species" place in nature. Determined by both physical (abiotic) and biological (biotic) factors based on interactions with other species. The realized niche of a species is more restricted than its fundamental niche. Fundamental niche: full range of climate conditions and good resources that permits the individuals in a species to live. Realized niche: actual range of habitats due to anatomy and interactions with other species. Phylogenetic niche conservation: come aspects of the niches of closely related species is similar, and so are evolutionary conserved. Intraspecific competition: competition between individuals of a single species. Always a lose-lose situation because each side spends energy it would not spend in the absence of the other. Competitive exclusion can present two species from occupying the same niche at the same time. Competition between two species prevents one from occupying a particular niche. Species compete for resources other than food.
