Unit 1: Ecosystems
Unit 2: Biodiversity
Unit 3: Populations
Unit 4: Earth Systems
Unit 5: Land and Water Use
100
Elephants kicking up flies for Cattle egrets to eat
Commensalism
100
Crows will happily eat insects, fruit, nuts, Cheetos, and everything else they can find, making them a great occupant of this ecological niche.
Generalist
100
If you have infinite resources, you could grow this way forever
Exponentially
100
The permeability of the soil depends on its composition, which we measure as a balance of these 3 materials.
Sand, silt, clay
100
A farmer can reduce soil erosion by up to 80% by quitting this method of soil preparation.
Tilling
200
If you're looking for a specific biome, you just need to find the right combination of these two variables.
Temperature and Precipitation
200
Gazelles and Cheetahs are exceptionally fast, partly due to the fact that they are locked in one of these, as predator and prey.
(Evolutionary) Arms Race
200
An accurate sense of growth rate requires birth and death rates, as well as these 2 other factors that effect growth rate.
Immigration and Emigration
200
The UK is relatively warm for its latitude. This is because of warm air being carried by what process, caused by differences in fluid density.
Ocean currents (convection currents)
200
The depletion of the Ogallala aquifer left even small farmers, who use a fraction of what large operations use, without access to reliable irrigation. This lack of ethical sharing demonstrates this concept.
The Tragedy of the Commons
300
A single nitrogen atom can take months to millions of years to cycle, but spends most of its time stored in this.
Atmosphere
300
In California, wildfires are bad for redwoods but good for Manzanita because fires are an excellent opportunity for this means of natural ecosystem restoration.
Secondary Succession
300
Trees don't have a great success rate when it comes to reproduction. Most seeds are destroyed before they even germinate. This makes them follow this type of survivorship.
Type 3
300
Warm air can't rise any further than this point into the atmosphere, the uppermost region of the troposphere.
Tropopause
300
A farmer can get a few good years of harvests by burning away forest land for agriculture, also known as this method.
Slash and Burn Agriculture
400
When calculating net primary productivity, subtract this from the gross primary productivity
Respiration (r)
400
It's more fun with skittles, but this calculation can give you a good estimate of biodiversity:
Simpson's Diversity Index
400
An estimate of population growth that involves only the crude birth and death rates
Natural Increase
400
Despite getting almost 24 hours of summer sun, the arctic is sub-freezing all year round. This is because of this factor, which is well below 90 degrees at those latiudes
(Solar) Angle of Incidence
400
In addition to pesticides, a farmer planted berry bushes near their field to attract insectivores. This is a classic example of this pesticide-minimization strategy.
Integrated Pest Management
500
This biome is a hotspot for biodiversity, thanks to the deposition of mineral nutrients and the brackish water.
Estuary
500
You utilize these whenever you go for a walk, go fishing, visit a national park, eat, drink, and pretty much every other activity that depends on an ecosystem.
Ecosystem services
500
If its wider at the base, the population is growing. If its wider at the top, then the population is declining.
Age Structure Diagram
500
In a soil profile, dead plant material will be found in this uppermost soil layer.
Organic Layer (O Horizon)
500
With the large amount of soil erosion and over 1/3 of the water evaporating away, this is decidedly the least efficient irrigation method.
Furrow Irrigation