chapter 40

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population ecology and the distribution of organisms
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1

march equinox

equator faces sun directly, neither pole tilts toward sun.

all regions on earth experience 12 hours night, 12 hours daylight

2

June solstice

northern hemisphere tilts toward sun and has longest day and shortest night. so southern hemisphere tilts away from sun, shortest day and longest night.

3

september equinox

equator faces sun directly, neither pole tilts toward sun, all regions on earth experience 12 hours of daylight and night.

4

december solstice

northern hemisphere tilts away from sun and has longest nights and shortest days. Southern Hemisphere tilts towards sun and has longest days and shortest nights

5

influences on the distribution of organisms and abundance

-climate

-abiotic factors (chemical+ physical attributes of env.)

-biotic factors (other organisms)

6

Components of climate

-temperature

-precipitation

-sunlight

-wind

7

Global Climate patterns determined by:

-solar energy

-earths movement in space