Biological Science (6th Edition)

Published by Benjamin Cummings
ISBN 10: 0321976495
ISBN 13: 978-0-32197-649-9

Chapter 52 - Community Ecology - Review - Page 1115: 7

Answer

The high-frequency forest fires are low in severity than low-frequency forest fires. The high-severity forest fires would open up more space for pioneer species as compared to the low severity of the fire.

Work Step by Step

The strong disruptions of short duration to a community that alters the distribution of biotic as well as abiotic resources is considered as disturbances. Some examples of disturbances are floods, forest-fires, and windstorms. These events change the distribution of resources like nutrients, light levels, and unoccupied space. The impact of disturbance on any community depends on the type, frequency, and severity of the disturbance. High-frequency fires are less severe compare to low-frequency fires as in low frequency fire more fuel builds up. In case of high frequency fire, in order to resist the effects of fires, intense natural selection for adaptations is exerted. Whereas in low frequency fire, in order to resist the effects of fires, less intense natural selection for adaptations is exerted.
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