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15 Cards in this Set
- Front
- Back
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What do ecologists study?
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Populations communities and Ecosystems
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What is study of populations?
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Determination of Population size controlling distribution and abundance of organisms
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What is a community?
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A Group of organisms of many different species which acquire energy different ways and might live in some sort of pattern together
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What is an ecosystem?
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Communities and cycling of nutrients and other materials
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What is an Autotroph and Heterotroph
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Auto-organsims that are photosynthetic/chemosynthetic
Hetero--organsims that feed on plants and other animals |
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What are categories referred as?
Give some examples... |
Trophic levels: Producers, herbivores, carnivores, decomposers
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what is a producer?
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photosynthetic organisms that get their enrgy from the sun and chemosynthetic organisms that get their energy from oxidation of inorganic molecules such as ammonia and nitrite
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what is the light/dark rxns?
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Light--when energy is storeed in ATP and NADPH2
Dark--inorganic material such as carbon dioxide is reduced by ATP and NADPH2 Energy of sun is stored in the bonds of C and H |
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2 examples of aquatic herbivores:
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Zooplankton and Benthic
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What is Benthic?
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benthic organisms are in the sediments in the bottom of an aquatic ecosystem. many of the benthic organisms are called DETRITOVORES b/c they consume organic debris from autotrophic layers higher in the water column.
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What 3 things may happen to organic matter?
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some is egested (not digested):
3 fates, 1. some is consumed by carnivores in the 3rd trophic level 2. some is oxidized in respiration 3. some is lost in the decomposition when an animal dies |
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Give some examples of Carnivores both in aquatic and terrestrial enviornments
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Aquatic: 3rd level-minnows and sunfish; 4th level-Bass pike salmon marlin swordfish and sharks
Terrestrial: 3rd level- lions cougars and dog type organisms |
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What do decomposers do? Examples?
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Break down organic matter and release the nutes
Ex:bacteria and fungi |
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What are 2 characteristic of all organisms?
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Metabolism and Mortality
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How much energy is transfered to the next trophic level and what happens to it?
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10% to the next level directly
Ex carnivores only receive 1% from producers. Most of the energy is lost through metabolism |
