Energy Pyramid
Most of the energy is found at what level of the energy pyramid?
Producer level
an organism that can produce its own food using light, water, carbon dioxide, or other chemicals
Autotroph
True or False: Food chains are composed of many overlapping food webs.
False
Give me examples of producers
Grass
Trees
Bushes
Ecosystem where water that is not salty, found in most lakes, rivers, streams, and ponds
Freshwater Ecosystem
What is the driving force behind energy pyramids, food chains, and food webs?
The sun?
an organism that cannot produce its own food and must obtain nutrients by consuming other organisms
Heterotroph
What are examples of biotic limiting factors?
Predators/Prey (food source)
Mates
Competition (other organisms) for resources
Give me examples of heterotrophs and autotrophs
Heterotrophs: consumers - humans, animals
Autotroph: producers - plants
Forest in a climate or region that has moderate, or mild, temperatures
Temperate Forest
As consumers eat one another, energy decreases. Why? What do they use most of their energy for?
The animals have to use 90% of their energy for life processes.
What converts the nitrogen in the atmosphere into a usable form for organisms to benefit?
Bacteria
What are examples of abiotic limiting factors?
Temperature
Sunlight
Water
pH
How can an animal be considered a second and third-level consumer?
If the animal eats both first and second-level consumers
A dense forest, usually in a tropical area, that receives a lot of rain and contains diverse animal and plant life
Tropical Rain forest
Why are producers important to the food chain/food web?
Without producers, the food web/chain would collapse because they provide first level consumers with energy directly and the other levels of consumers indirectly obtain energy from producers.
break down dead organisms and recycle nutrients into the soil
Decomposers
The carbon cycle includes what cycles?
photosynthesis, respiration, combustion, and decomposition
a cold, treeless Arctic region where the ground is always frozen
Arctic tundra
an area of land that does not usually get much rain; can be either hot or cold
Desert
90% of the energy lost in the food pyramid is lost as what?
Heat
Define the following terms:
Herbivore
Carnivore
Omnivore
Scavenger
Herbivore: Eats plants ONLY
Carnivore: Eats meat ONLY
Omnivore: Eats plants AND animals
Scavenger: Eats animal remains and decaying matter of plants and animals
The burning of fossil fuels
a community of organisms and their abiotic environment
Ecosystem
What causes eutrophication?
Access nutrients (phosphorus and nitrogen) penetrate bodies of water, causing an increase in algae growth. When the algae begin to die off, carbon dioxide increases while oxygen decreases.