Limiting Factors
What happens if there is no water?
Organisms cannot survive
A diagram that shows how energy decreases as it moves up trophic levels.
Energy Pyramid
A type of symbiosis where one organism benefits and the other is not helped or harmed.
Commensalism
Eats plants
Herbivore
What is deforestation?
Cutting down forests
Too many deer eat all the plants; what is the limiting factor?
Food
The max population size that am ecosystem can hold is called?
Carrying Capacity
A network of many connected food chains in an ecosystem.
Food web
The role or job of an organism in its ecosystem.
Niche
What type of consumer eats only meat?
Carnivore
Less space means fewer organisms
Habitat Loss
Wolves hunting rabbits is what type of factor?
Biotic (predation)
Abiotic Factors?
Water
Space
Disease (Viruses)
Climate Change
Sunlight
Why is the sun important in a food chain
It is the original source of energy
A close relationship between two different species that live together
Symbiosis
What do decomposers break down?
Dead Organisms
Unfair compeition for native species
Introduction of invasive species.
In a forest, oak trees grow and produce acorns. Squirrels eat the acorns, owls eat squirrels, and mushrooms grow on dead logs.
Producer?
Consumer?
Decomposers?
Producers: Oak trees
Consumers: Squirrels, owls
Decomposers: Mushrooms
How do predators help control populations?
By eating preys
What happens if one organism is removed a food web?
It becomes unbalanced and can affect the whole ecosystem.
When organisms fight or struggle for the same resources
Competition
Why are decomposers important
Recycle nutrients
Death and Disease in organism populations
More pollution
In a pond, algae float on the surface. Tiny fish eat the algae, bigger fish eat the tiny fish, and bacteria break down dead fish.
Producers?
Consumers?
Decomposers?
Producers: Algae
Consumers: Tiny fish, bigger fish
Decomposers: Bacteria
Biotic Factors?
Food
Predators
Competition
Disease (Bacteria)
What is the first level in a food chain
Producer
An organism that cannot make its own food and must eat other organisms
Heterotroph
Name a consumer that eats both plants and animals
Omnivore
Loss of one organism can have a major effect on the whole ecosystem
Less Biodiversity
Lack of sunlight affecting plants is what?
Abiotic
Deer eat plants, and wolves hunt deer. A very cold winter kills some plants. A parasite makes some deer sick. Humans cut down trees to build homes.
What are the Abiotic and the Biotic factors?
Abiotic limiting factors: Cold winter
Biotic limiting factors: Parasites and the wolves hunting deer
What type of consumer eats other consumers
Secondary or tertiary consumer
Things in the environment that limit the size of a population
Limiting Factor
In a backyard garden, grass grows and flowers bloom. Rabbits eat the grass, birds eat the rabbits, and worms break down dead plants.
Producers
Consumers?
Decomposers?
Producers: Grass, flowers
Consumers: Rabbits, birds
Decomposers: Worms
The growth of human numbers which results in building towns and cities.
Urbanization
Farmers limit pests using chemicals—what type of limiting factor is this?
Biotic
In a pond, tiny fish eat algae. Bigger fish eat the small fish, and birds eat the bigger fish. One summer, the pond water gets very hot and some algae die. Pollution from a nearby farm also kills some small fish.
What are the biotic and abiotic factors?
Abiotic limiting factors: Hot water, pollution
Biotic limiting factors: Birds eating fish
Why food webs are important?
It shows how organisms depend on each other.
When one organism hunts and eats another organism
Predation
In the rainforest, tall trees grow fruit. Monkeys eat the fruit, jaguars eat the monkeys, and fungi grow on dead logs.
Producers
Consumers
Decomposer?
Producers: Trees
Consumers: Monkeys, jaguars
Decomposers: Fungi
Less food and water mean less survival and reproduction
Resource Loss
Animals fighting over territory is what?
Competition
Rabbits eat grass, and foxes hunt rabbits. A fire burns part of the grassland, and a disease makes some rabbits sick. Farmers build farms and take away space for animals.
What are the abiotic and biotic factors?
Abiotic limiting factors: Fire, less space
Biotic limiting factors: Disease, foxes hunting rabbits
Snake
Sun
Plant
Grasshopper
Owl
Bird
Place the food chain in order
Sun Plant Grasshopper Bird Snake Owl
The study of relationships between organisms and their environment
Ecology
In the grassland, grass grows and flowers bloom. Grasshoppers eat the grass, snakes eat the grasshoppers, and bacteria break down dead snakes and plants.
Producers?
Consumers?
Decomposers?
Producers: Grass, flowers
Consumers: Grasshoppers, snakes
Decomposers: Bacteria
Process by which land dries up and loses bodies of water, vegetation and wildlife becomes a desert.
Desertification
A drought reduces water supply, what factor is this?
Abiotic