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Biome, Population, Community, Ecosystem, and Biosphere
list the five levels of organization (not species) that ecologists’ study from smallest to largest
Biotic factors
living organisms that are a part of an ecosystem
Abiotic factors
nonliving physical or chemical conditions that affect an ecosystem
plants and animals
examples of biotic factors
sunlight, water temperature, wind, soil, and natural disturbance
examples of abiotic factors
It is added to the air, because it releases it after death
If a tree dies and slowly rots away, does this add carbon dioxide to or remove it from the air?
Photosynthesis of Phytoplankton
A large amount of the carbon dioxide goes into the ocean but is not dissolved. If it isn’t dissolved, what is it used for?
The level of oxygen would go way down
Suppose producers made only the food that they needed and never made any extra. What would happen to the oxygen level in the atmosphere?
all the consumers would die because we need oxygen to live, eat, and breath
Suppose producers made only the food that they needed and never made any extra. What would happen to the consumers of creation?
Plants use carbon dioxide for photosynthesis to make glucose, which produces oxygen
Explain how photosynthesis is involved in cycling carbon dioxide and oxygen
Respiration uses oxygen to break down glucose for fuel. During this process, carbon dioxide is released
Explain how respiration is involved in cycling carbon dioxide and oxygen
1st way bacteria in involved in the nitrogen cycle
Nitrogen-fixing bacteria convert atmospheric nitrogen to ammonia
2nd way bacteria is involved in the nitrogen cycle
Nitrifying bacteria convert ammonia to nitrates or nitrites
3rd way bacteria is involved in the nitrogen cycle
Denitrifying bacteria convert nitrates to nitrogen gas
mainly by climate, which includes the abiotic factors and precipitation level
How are biomes classified?
be able to store water to stay alive
What characteristics would expect desert plants to have?
and desert animals burrow during the day and are active at night when it is cooler
What characteristics would expect desert animals to have?
They use factors such as water depth and the amount of sunlight available for photosynthesis
Some aquatic biomes are divided into zones. What factors do scientists use to make these divisions?
the ocean, coral reefs, and estuaries
What are the main marine biomes?
lakes, ponds, rivers, and streams
What are the main freshwater biomes?
competition, predation, and symbiosis
What are the three types of community interactions?
mutualism, commensalism, and parasitism
What are the three types of symbiosis?
Primary succession begins on baron rock while secondary succession begins on existing soil
What is the difference between primary and secondary succession?
17.             Geographical distribution, population density, and growth rate characteristics
What three characteristics do ecologists use to describe populations?