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20 Cards in this Set

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Ecology
study of interactions that take place among organisms and their environment
Biosphere
part of Earth that supports life, including the top portion of Earth's crust, the atmosphere, and all the water on Earth's surface
Ecosystem
all the living organisms that live in an area and the nonliving features of their environment
Population
all the organisms that belong to the same species living in a community
Community
all the populations of different species that live in an ecosystem
Habitat
place where an organism lives and that provides the types of food, shelter, moisture, and temperature needed for survival
Limiting Factor
anything that can restrict the size of a population, including living and nonliving features of an ecosystem, such as predators or drought
Carrying Capacity
largest number of individuals of a particular species that an ecosystem can support over time
Consumer
organism that cannot create energy-rich molecules but obtains its food by eating other organisms
Producer
organism, such as a green plant or alga, that uses an outside source of energy like the Sun to create energy-rich food molecules
Food Chain
simple model of the feeding relationships in an ecosystem
Food Web
model that shows the complex feeding relationships among organisms in a community
Symbiosis
any close relationship between species, including mutualism, commensalisms, and parasitism
Mutualism
a type of symbiotic relationship in which both organisms benefit
Parasitism
a type of symbiotic relationship in which one organism benefits and the other organism is harmed
Commensalism
a type of symbiotic relationship in which one organism benefits and the other organism is not affected
Abiotis
nonliving, physical features of the environment, including air, water, sunlight, soil, temperature, and climate
Biotic
features of the environment that are alive or were once alive
Niche
in an ecosystem, refers to the unique ways an organi9sm survives, obtains food and shelter, and voids danger
Invasive (or nonnative or introduced) species
species that moves into an ecosystem as a result of human actions and can reduce or eliminate populations of native species