Biology 1001A Lecture Notes - Carrying Capacity, Logistic Function, Exponential Growth
30 Apr 2012
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Characteristics of populations can affect population growth rates: age structure: the proportion of individuals that are pre reproductive (too young to reproduce) versus reproductive ages versus too old to reproduce. Survivorship curves: survivorship curves make use of the same information life tables, allow us to analyze when most of the mortality occurs in a life span, there are three main types of survivorship curves: Type 1: short risk of death until old age (typically large animals like humans) Type 2: the risk of mortality is usually constant, usually nothing to do with old age (typically small vertebrae animals like lizards) Type 3: most die in early life and do not make it to adulthood, thus an older individual has a larger chance of survival than a young one (typically in animals that produce many offspring like fish) Life history characteristics: all organisms must partition their energy into a combination of these three processes:
