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APES Ch6 Vocab Lytle

Lytle - APES Ch 6 Vocab

autotrophs An organism that produces its own food from inorganic compounds and a source of energy. There are photoautotrophs and chemical autotrophs
community-level interactions When the interaction between two species leads to changes in the presence or absence of other species or in a large change in abundance of other species, then a community effect is said to have occurred.
decomposers Organisims that feed on dead organic matter.
ecological community 1.Conceptual or functional meaning: set of interacting species that occur in same place(sometimes extended to mean a set that interacts in way to sustain life) 2. operational meaning: set of species found in an area, whether or not they are interacting
food chains The linkage of who feeds on whom.
food webs A network of who feeds on whom or a diagram showing who feeds on who. It is synonymous with food chain
keystone species A species, such as the sea otter that has a large effect on its community or ecosystem so that its removal or addition to the community leads to major changes in the abundances of many or all other species.
succession The process of establishment and development of an ecosystem.
trophic level In an ecological community, all the organisms that are the same number of food-chain steps from the primary source of energy.
watershed An area of land that forms the drainage of a stream or river. If a drop of rain falls anywhere within a watershed to become surface runoff, it can flow out only through the same stream.
Created by: jdlytle