Chapter 4 Vocab Flashcards
organism that is able to capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer
autotroph
process used by plants and other autotrophs to capture light energy and use it to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches
Phtosynthesis
first producer of energy-rich compounds that are later used by other organisms
Primary producer
process in which chemical energy is used to produce carbohydrates
Chemosythesis
organism that obtains food by consuming other living things; also called a consumer
Heterotophs
organism that relies on other organisms for its energy and food supply; also called a heterotroph
Consumers
material made up of decaying bits of plant and animal material
Detrius
a series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
Food chain
photosynthetic algae found near the surface of the ocean
Phytoplankton
network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem
food web
Each step in a food chain or web.
Trophic level
llustration of the relative amounts of energy or matter contained within each trophic level in a given food chain or food web.
ecological pyramid
total amount of living tissue within a given trophic level
Biomass
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
Biogeochemical Cycle
chemical substance that an organism needs to sustain life
Nutrients
