NATS 1840 Chapter Notes - Chapter 9: Invasive Species, Overconsumption

• School: York University
• Department: Natural Science
• Course: NATS 1840
• Professor: Carl Wolfe

Document Summary

Populations can change in how they are distributed in a habitat ( population distribution or population dispersion), there are 3 types: Clumping (most of the world species: the resources a species need vary in availability in different places, better protection from predators, gives predator species a higher chance of obtaining food, ideal for mating and caring for young. Age structure: organisms that are not mature enough to reproduce (pre reproductive stage), those that are capable of production (reproductive stage), those that are too old to reproduce (post reproductive stage). Large amount in reproductive stage or soon to enter this stage is likely to grow. Large amount in post reproductive, likely to shrink. Intrinsic rate of increase (r ): the rate at which a population would grow if it had unlimited resources. Environmental resistance: the factors that act to limit the growth of a population. Biotic potential and environmental resistance determine the carrying capacity (k)- the.