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Friday, March 14
Bell Work:
What is ecology?
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Pacific Salmon provide food for 140 species of wildlife. Their bodies return vital nutrients back into the river system for plants to grow.
Many species of salmon are threatened with extinction because of competition from hatchery fish, blocked river paths, and loss of spawning grounds. If the population continues to decline, how are other species affected? What effect would the loss of salmon have on a local and global scale?
Ecology study of the interactions among living things and between living things and their surroundings.Oikoshouse
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Organism individual living thingalligator
Population group of the same species that live together in one area all the alligators
Community group of different species that live together. alligators,turtles, birds, fish and plants in the Florida Everglades.
Ecosystem all the organisms as well as the abiotic factors in an area. Vary in sizeEverglades
Biome major regional or global community of organisms. Characterized by climate conditions and plant communities. Tropical Rainforest
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Abiotic nonliving factors NOT DEAD!
Examples: moisture, temperature, wind, sunlight, soil
Biotic Living components or things that come from living organisms.
Examples: plants, animals, fungi and bacteria
More fish live in coral reefs near saltwater marshes because of the habitat provided by mangrove trees. Key biotic factors are the mangrove trees because they provide food and shelter for newly hatched fish.Key abiotic factors are low levels of oxygen and changing levels of salinity (saltiness of water)
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Biodiversity is the assortment of living things in an ecosystem. A amount of biodiversity in an area depends on moisture and temperature among other things.
Tropical Rainforests which are warm and moist have the largest biodiversity on Earth's ground surface and are considered a hot spot because it is an area rich in biodiversity that is being threatened by human activity.
A keystone species is a species that has an unusually large effect on its ecosystem.
Example: Beavers
Beavers build dams changing freeflowing streams into ponds, wetlands and meadows.
1. A greater number and variety of fish are able to live in still waters of ponds.
2. Fish attract fisheating birds3. Insects inhabit the area, increasing the insect
eating birds in the area.4. Waterfowl nests along the ponds edge.5. Animals that prey on birds or eggs are attracted to
the pond.
