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Definition
| autotrophs that make organic molecules |
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| produce carbohydrates by using energy from inorganic molecules |
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| the organic material in an ecosystem |
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| indicates the organism's position in the sequence of energy transfer |
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Definition
| interrelated food chains in an ecosystem |
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Definition
| movement from abiotic to living things and back again |
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Definition
| the process of converting nitrogen gas to nitrate |
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| reintroduction of nitrogen to the ecosystem that would have been lost |
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| occurs when anaerobic bacteria break down nitrates and release nitrogen gas |
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Definition
| the part of the ocean that receives sunlight |
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| cold and dark depths of the ocean where sunlight cannot penetrate |
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| area along ocean shores where the tides produce a rythmic rise and fall of the water level |
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| communities of small organisms that drift with the ocean currents |
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| rich in organic matter and vegetation |
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