Definitions
A single living thing
Organism
Give three examples of abiotic factors
water, soil, sunlight, etc.
What could be a reason for the decrease of a grasshopper population?
There is a decrease in the population of its food.
There is an increase in the population of its predator.
Name an ecosystem that will be least effected by flooding
Ocean, lake, river, etc.
What two factors make up an ecosystem
Abiotic and Biotic Factors
The number of the same species in a particular area
Population
Living things in an ecosystem
Biotic Factors
What causes organisms to compete??
Limited Resources
Producers
Organisms that make/produce their own food
An organism that is eaten by another organism
Prey
What are limited resources?
Something that is needed by organisms for survival, not infinite in abundance
3 signs of life of living things
Moving, growing, changing, responding, needing food
Wolves and bears live in the same habitat. What would cause them to compete?
If they ate the same species.
They use the same shelter.
Fish in a small pond depend on what biotic factors to meet their needs?
Plants, other organisms for food
GRASS→ CATERPILLAR → BLUEBIRD→ HAWK→
The caterpillar is what order consumer?
Primary Consumer
Competition for resources among different species
Interspecific Competition
What abiotic factors influence the relationships of organisms in ecosystems?
Sunlight, weather, soil composition
What resources do plants compete for?
Water, sunlight, CO2
What could cause populations to increase in an ecosystem?
Increase in prey
Decrease in predators
A lion is a [ ] when it eats a gazelle.
Predator
Infraspecific Competition
Competition for resources among the same species
Rabbits live in a certain ecosystem where they are hunted by coyotes and hawks. What would NOT cause a reduction in the rabbit population?
A reduction in the coyotes and hawk population
In a certain ecosystem, foxes and snakes prey on the same species of rabbit. What would increase the competition between the foxes and snake
Increase in population of foxes and snakes.
Reduction in size of habitat.
Reduction in number of rabbits.
What could cause populations to decrease in an ecosystem?
Increase in predators
The amount of food, water, space, shelter, etc. that are needed for life are what types of factors in an ecosystem?
Abiotic