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17 Cards in this Set

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Species

Organisms that can interbreed to produce viable offspring

Habitat

Environment that a species lives in

Population

Group of the same species that lives in the same location at the same time

Community

Group of species that live and interact in the same location at the same time

Ecosystem

Consists of the communities and abiotic factors in their environment

Ecology

The study of the relationships amongst populations, and between the community and its environment

Autotroph

Organism that synthesis its organic molecules from simple, inorganic substances

Heterotrophs

Organism that obtains its organic molecules from other organisms

Consumers

Ingest other organisms that are living/recently killed

Detrivores

Ingests non-living matter

Saprotrophs

Live in or on non-living matter, secrete digestive enzymes and absorb the product of that extra-cellular digestion

Food Chain

Demonstrates the linear feeding relations between different species in a community




- Arrows represent flow of energy/matter


- First organism is producer, rest are consumers (primary, secondary, tertiary)

Food Webs

Diagram that shows how food chains are linked together into more complex feeding relationships within a community

Trophic level

Refers to the position an organism occupies in a food chain (producer/ primary consumer/ secondary consumer...)

Light is the initial energy source for almost all communities

(statement)

Energy transformations in living organisms is never 100% efficient

About 90% of the energy lost between trophic levels


- lost as heat


- unconsumed parts of food


- used in cellular respiration


- excreted/egested

Saprotrophic bacteria and fungi (decomposers) recycle nutrients

Saprotrophic activity of bacteria/fungi free inorganic materials from the dead bodies and waste products oforganisms, ensuring a continual supply of raw materials for the producers