1 Flashcards
Stochasticity?
Random changes in the relative abundances of a species. This is caused by fluctuations of birth and death rate.
Species distribution models?
Show the distribution of a species due to various abiotic conditions.
Why is the equator hotter than the poles?
•Toward the poles, sun rays are spread over a larger area and take a longer path through the atmosphere.
!!!a’ a b’ b
What is everything that cause hot temperatures at certain regions of earth? 3•
•Length of sunrays on what part it hits first
•Tilt of earth which influence the first answer.
•Upwelling and ocean currents (since water either warms or cools air depending on current temperature)
Hadley cells?
When warm air cools at high altitudes and spreads 30 degrees north and south.
If you have Hadley cells, what does this mean for precipitation?
There is more precipitation where the warm air rises (e.g. equator) but less around where the warm air rises (e.g. equator) since warm air that rises loose a lot of moisture, but once dry cool air falls at 30 degrees N and S, they absorb moisture.
Coriolis effect?
When wind gets deflected to the right or left of the direction of movement when its going near the equator due to earth’s rotation.
The temperature of ocean currents and surface winds affect the?
Climate on the land.
Why is air cooler at higher elevation?
Since air becomes less dense and molecules are farther apart. Molecules interact with each other less producing less heat.
Why are there distinct habitat at either side of a mountain?
Since warm air rises and releases moisture (rains) in one side of the mountain and cools at the top, then the dry air falls in the other side of the mountain and absorbs moisture.
When is stochasticity more important?
At smaller population sizes.
Climate?
Changes of weather over a time period.
Where does most energy that drives the global climate system come from?
Solar radiation.
What needs to happen for earth’s temperature to remain the same?
Energy gains must be balanced by energy losses.
