chapter two honors bio ecology vocab
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29 Terms
ecology
scientific discipline in which the relationships of organisms and environment is studied
biosphere
the portion of earth that supports life
biotic factor
living factors in an organisms environment
abiotic factors
nonliving factors in an organisms environment
population
individual organisms of a single species that are in the same place at the same time
biological community
a group of interacting populations at the same place at the same time
ecosystem
a biological community and all of the abiotic factors that effect it
biome
a large group of ecosystems that shared the same climate and similar communities
habitat
an area where an organism lives
niche
the role or position that an organism has in its environment
predation
the act of one organism consuming another organism for food
symbiosis
the close relationship that exists when two or more species live together
mutualism
the relationship between two or more organisms that benefit from each other
commensalism
a relationship where one organism benefits and one is neither harmed nor helped
parasitism
where one organism benefits at the expense of another
autotroph
an organism that collects energy from sunlight or inorganic substances for food
heterotroph
an organism that gets its energy requirements from consuming other organisms
carnivore
an organism that only eats meat
herbivore
an organism that only eats plants
detritovore
eat dead things and return the nutrients to the earth
trophic level
each step in a food chain or food web
food web
a model representing the many interconnected food chains and pathways
food chain
a simple model that shows how energy flows through an ecosystem
biomass
the total mass of any living matter at each trophic level
matter
anything that has mass and takes up space
nutrient
a chemical substance that an organism must obtain to sustain life
biogeochemical cycle
cycles involving living organisms, and geological and chemical processes
nitrogen fixation
the process of capturing and converting nitrogen
denitrofixcation
when some soil bacteria convert fixed nitrogen compounds back into nitrogen gas, which returns it to the atmosphere