Biology Chapter 2: Principles of Ecology (2.1-2.2)

species
group of organisms that can interbreed and produce fertile offspring in nature

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

biosphere
relatively thin layer of Earth and its atmosphere that supports life

biotic factor
any living factor in an organism’s environment

abiotic factor
any nonliving factor in an organism’s environment

population
group of organisms of the same species that occupy the same geographic place at the same time

biological community
all the interacting populations of different species that live in the same geographic 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
role, or position, of an organism in its environment

predation
act of one organism feeding on another organism

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

mutualism
symbiotic relationship in which both organisms benefit

commensalism
symbiotic relationship in which one organism benefits and the other organism is neither helped nor harmed

parasitism
symbiotic relationship in which one organism benefits at the expense of another organism

energy
the ability to cause change; cannot be created or destroyed, only transferred

autotroph
organism that captures energy from sunlight or inorganic substances to produce its own food; provides the foundation of the food supply for other organisms; also called a producer

heterotroph
organism that cannot make its own food and gets nutrients and energy requirements by feeding on other organisms; also called a consumer

herbivore
heterotroph that eats only plants

carnivore
heterotroph that preys on other heterotroph

omnivore
heterotroph that consumes both plants and animals

detritivore
heterotroph that decomposes organic material and returns the nutrients to soil, air, and water, making the nutrients available to other organisms

trophic level
each step in a food chain or food web

food chain
simplified model that shows a single path for energy flow through an ecosystem

food web
model that shows many interconnected food chains and pathways in which energy and matter flow through an ecosystem

biomass
total mass of living matter at each trophic level

Tagged In :

Get help with your homework


image
Haven't found the Essay You Want? Get your custom essay sample For Only $13.90/page

Sarah from studyhippoHi there, would you like to get such a paper? How about receiving a customized one?

Check it out