organisms and their relationships

module 2 lesson 1 vocab

ecology

the scientific study of all the interrelationships between organisms and their environment .

biosphere

thin layer of earth and it’s atmosphere that supports life .

biotic factor

any living factor in an organisms environment .

abiotic factors

any nonliving factor in an organism’s environment .

limiting factor

biotic or abiotic factor that restricts the number , distribution , or reproduction of a population with a community .

tolerance

an organism’s ability to survive biotic and abiotic factors .

population

group of organisms of the same species that occupy the same geo. place at the same time .

biological community

all the interacting populations of different species that live in the same geo. location at the same time .

ecosystem

biological community and all the nonliving factors that affect it .

biome

large group of ecosystems that share the same climate and have similar types of communities .

habitat

physical area in which an organism lives .

niche

an organism’s role , or position in it’s environment .

predatation

when one organism feeds on another organism .

symbiosis

close mutualistic , parasitic , or commensal association between two or more species that live together .

mutualism

symbiotic relationship where both organisms benefit . ( + , + )

commensalism

symbiotic relationship where one organism benefits , while the other one stays nuteral . ( + , o )

parasitism

symbiotic relationship where one organism benefits , and the other is hurt . ( + , - )