BIO 105QR Study Guide - Final Guide: Cactus, Habitat Destruction, Exponential Growth

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15 Dec 2016
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Abiotic: the non-living parts of an ecosystem. (living factors) ecosystem (chemical/physical factors) * the environment can be divided into 2 components (abiotic and biotic) : a population is a collection of individuals of the same species in the same place at the same time. Populations can be evaluated by their boundaries, size, and life history: population boundaries depend on density and dispersion, population density vs. population dispersion: Population density the number of individuals of a species per unit area. Both of these contribute to the rate at which population changes size (the population growth rate: exponential growth impacts population size by the expansion of a population under ideal, unregulated conditions. Populations cannot grow unchecked forever, so exponential growth never lasts long in nature: factors that lead to logistic population growth: In nature, a population might grow exponentially for a while, but eventually one or more environmental factors will limit its growth, and the population size will level off.

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