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summer science 2 7th

part of the earth that supports organisms. biosphere
study of interactions among organisms and between organisms and the environment. ecology
all the nonliving features of the environment that help determine which species can survive in the area. abiotic factor
living or once-living features of the environment. biotic factor
all the individuals of one species that live in the same area. population
groups of populations that interact with each other in a given area. community
a biotic community and the abiotic factors that affect it. ecosystem
size of a population that occupies an area of limited size. population density
any biotic or abiotic factor that restricts the number of individuals in a population. limiting factors
the largest number of individuals an environment can support and maintain over a long period of time. carrying capacity
an organism that preys on and consumes animals predator
an organism caught or hunted for food by another organism. prey
organism that cannot make its own food. consumer
organism that can make food. producer
organism, such as fungi or bacteria, that consumes wastes and dead organisms. decomposer
any close relationship between two or more different species. symbiosis
a symbiotic relationship that benefits both species. mutualism
a symbiotic relationship that benefits one partner but does not harm or help the other. commensalism
a symbiotic relationship that benefits the parasite and does definite harm to the parasite’s host. parasitism
physical location where an organism lives. habitat
role of an organism in the ecosystem. niche
model used to describe a series of overlapping food chains. food web
model used to describe the transfer of energy in an ecosystem. ecological pyramid
transfer of nitrogen from the atmosphere to plants and back to the atmosphere or directly into plants again. nitrogen cycle
process in which some types of bacteria in the soil change nitrogen gas into a form of nitrogen that plants can use. nitrogen fixation
destruction and cutting down forests resulting in increased atmospheric Carbon Dioxide levels. deforestation
the rapid depletion of plant life and the loss of topsoil in the desert. desertification
anything that has mass and takes up space. matter
Created by: levis