ecology Flashcards

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1
Q

biotic factors

A

biological factors caused by the prescence of other organisms

-predation of animals (reduce)
-competition for limited resources
-new pathogen
-new predator

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2
Q

why not many independent variables

A

-fair
valid compairson

other factors

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3
Q

quadrat

A
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4
Q

antibiotic factors

A

physical factors that affect the distribution size of an organism:
-temp
-light intensity
-humidity/moisture level
-co2
-02

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5
Q

food web

trophic level

pyramid of numbers

A

show interdependence how change in one population can affect others

level/position of each organism in food chain

show population of each organism at each trophic level in food chain. usually smaller as go up as most lose energy but oe large oak tree feed many small

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6
Q

habitat def

decomposers

A

-within an ecosystem where individual species live ie in lake bottom o swamp

-organisms that feed by saprotrophic nutrition on dead animals or non living organic matter for energy

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7
Q

ecology

ecosystem

community

A

-interaction of all the organisms living within an area and environment around them ie deserts, coral reef, lake.

community-all organisms and populations of diff species living within an ecosystem

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8
Q

way to measure quad

A

ACFOR

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9
Q

pyramid of biomass

pyramid of energy

A

amount of living material of organisms

calculate:average dry mis of one individual Tims total number of individuals

problem: can be inverted due to undersamplngsuch assort life span of algae in food web or standing crop of tree

pyramids of energy: amount of chemical energy in organisms in each trophic level available to those who feed

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10
Q

how is energy lost

A

only 10 percent passed on. number increase less energy available as up due to aspiration, egested/excretion, life process movement, bones

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11
Q

population

habitat

A

a group of individuals of one species living in a habitat

area in ecosystem where a population of animals live

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