Unit 4 Silver Q Flashcards
Explain why a population varies slightly above and below the carrying capacity of its environment
Amount of resources are constant
With enough resources, reproduction occurs, population increases
Now there are more individuals than the resources can provide for
There are some deaths that occur from this, the population goes down until there are enough resources to go around (few enough individual for the resources to provide for
Explain why the information provided by age-structure diagram is useful
-Resource allocation-Helps with how to use the resources we have to good use
To decide how to use resources, use the space and money to make school or retirement home
Explain the negative environmental effects associated with the green revolution
Mass irrigation-non-sustainable use of aquifers using it faster than it can replace itself
Fertilizer Run off
-Goes into bodies of water, explosive growth of algae, Runoff is not consistent-algae dies, Decomposition of dead algae uses the oxygen in the water (Decomposes use 02) , Will less oxygen, fish die
Pesticide use
-Toxic from pesticides build up in the ecosystem
-Bugs have 1 milligram, frog eats 5 bugs, now frog has 5 miligrams
High yield GMO seeds
-Disease kills them off because they are all genetically identical
Explain what a keystone species is. Name 2 keystone species and describe their niche
Keystone Species
-A species that is strongly needed for everything to work (Species that is every important to the ecosystem)
-Honey Bee- important b/c it is a major pollinator, helps plants reproduce
-Dung Beetles- Recycle waste which helps keep the earth clean of dung
Describe 2 examples of resource partitioning. For each example, explain how the species involved accomplish this
Helps reduce competition by;
-Eating at different times (Owl eats at night, robin eats during the day)
-Eating at different places (Leopard riverbanks, Lion (open woodlands),
