PCB 4043 Chapter Notes - Chapter 10: Life Table, Exponential Growth, Poa
24 May 2016
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One of the ecological maxims is: no population can increase in size forever. The limits imposed by a finite planet restrict a feature of all species: a capacity for rapid population growth. Ecologists try to understand the factors that limit or promote population growth. Concept 10. 1: life tables show how survival and reproductive rates vary with age, size, or life cycle stage. Information about births and deaths is essential to predict future population size life table is a summary of how survival and reproductive rates vary with age. Life table data for the grass poa annua were collected by marking 843 naturally germinating seedlings and then following their fates over time. A cohort life table follows the fate of a group of individuals all born at the same time (a cohort): mostly used for sessile organisms. Organisms that are highly mobile or have long life spans are difficult to track.
