Chapter 3 Vocab 3.3 and 3.4 Flashcards Preview

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Flashcards in Chapter 3 Vocab 3.3 and 3.4 Deck (12):
1

Food Chain

Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten

2

Phytoplankton

Photosynthetic algae found near the surface of the ocean

3

Food web

Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem

4

Zooplankton

Small free floating animals that form part of plankton

5

Trophic level

Each step in a food chain or food web

6

Ecological pyramids

Illustration of the relative amounts of energy or matter contained within each trophies level in a given food chain or food web

7

Biomass

Total amount of living tissue within a given trophic level

8

Biogeochemical cycles

Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another

9

Nutrients

Chemical substance that an organism needs to sustain life

10

Nitrogen fixation

Process of converting nitrogen gas into nitrogen compounds that plants can absorb and use

11

Denitrification

Process by which bacteria convert nitrates into nitrogen gas

12

Limiting nutrient

Single essential nutrient that limits productivity in an ecosystem