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1.organisms unable to make their own food
4.nonliving parts of the environment
7.interbreeding individuals of one species that compete with one another for food, water, and mates and live in the same place at the same time
8.organisms that play beneficial roles in all ecosystems by breaking down and absorbing nutrients from dead and decaying organicmatter
9.symbiotic relationship beneficial to both species
10.coastal body of water in which both frewhwater and saltwater mix
11.collection of niches in which an organism lives
15.biome composed of large communities of grasses and other small plants
16.large areas with the same type of climax community
17.development of living communities from bare rock, where pioneer species such as lichens are often followed by small plants, then trees
19.biome in which an even amount of precipitation falls in all four seasons; includes hardwood trees that lose their foilage annually
21.scientific study of interactions between organisms and their environments
24.symbiotic relationship in which one species benefits and the other species is neither harmed nor helped
27.portion of the marine biome shallow enough for the sun to penetrate
29.biome located just south ot the tundra
30.any factor limiting hte survival and productivity of organisms
31.role of a particular species in a community regarding food, space, reproduction, and how it interacts with abiotic factors
33.microscopic organissm found floating in the photic zone
34.populations in a community and abiotic factors with which they interact
35.animal that plays a positive role in the ecosystem by consuming dead organisms and their refuse
36.treeless biome south of the ice cap of the north pole
2.most biologically diverse terrestrial biome
3.symbiotic relationship in which one species benefits at the expense of he other species
5.part of the shoreline between the high and low tide lines
6.living partos of the environment
12.life-supporting portions of Earth composed of air, land, fresh water, adn salt water
13.permanent, close association between two organisms of different species
14.stable, mature community that undergoes little ecological succession
18.ahsows all the possible feeding relationships in a community at each trophic level
20.a possible route for the transfer of matter and energy through an ecosystem
22.link represented by each organism in a food chain
23.layer of permanently frozen ground found under the topmost layer of soil in the tundra
25.marine biome that never receives sunlight because of water depth
26.several interacting populations that inhabit a common environment
28.organisms that are able to synthesize food using sun energy or energy stored in chemical compounds
32.driest biome south of the taiga; receives less than 25cm of precipitation annually, and produces a range of vegetation including shrubs

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