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| 5711648852 | Community | An assemblage of populations of various species living close enough for potential interaction | 0 | |
| 5711661883 | Interspecifc interactions | Relationships between species in a community | 1 | |
| 5711672825 | Interspecific competition | Occurs when species compete for a resource in short supply | 2 | |
| 5711692887 | Competitive exclusion | Local elimination of a competing species | 3 | |
| 5711700603 | Competitive exclusion principle | States that two species competing for the same limiting resources cannot coexist in the same place | 4 | |
| 5711713150 | Ecological niche | The total of a species' use of biotic and abiotic resources | 5 | |
| 5711726102 | Resource partitioning | Differentiation of ecological niches enabling similar species to coexist in a community | 6 | |
| 5711736349 | Character displacement | A tendency for characteristics to be more divergent in sympatric populations of 2 species than in allopatric populations of the same 2 species | 7 | |
| 5711757417 | Fundamental niche | All the places an organism could live without competition | 8 | |
| 5711765757 | Realized niche | Where an organism actually lives | 9 | |
| 5711772033 | Predation | Refers to interaction where one species, the predator, kills and eats the other, the prey | 10 | |
| 5711784753 | Cryptic coloration | camouflage, makes prey difficult to spot | 11 | |
| 5711801324 | Aposematic coloration | Animals with effective chemical defense often exhibit bright warning coloration | 12 | |
| 5711815413 | Batesian mimicry | Palatable or harmless species mimics an unpalatable or harmful model | 13 | |
| 5711825101 | Mullerian mimicry | 2 or more unpalatable species resemble each other | 14 | |
| 5711831731 | Herbivory | Refers to an interaction in which an herbivore eats parts of a plant or alga | 15 | |
| 5711898484 | Symbiosis | A relationship where 2 or more species live in direct and intimate contact with one another | 16 | |
| 5711906083 | Parasitism | One organism derives nourishment from another organism, its host which is harmed in the process | 17 | |
| 5711917027 | Endoparasites | Parasites that live within the body of their host | 18 | |
| 5711926917 | Ectoparasites | Parasites that live on the external surface of a host | 19 | |
| 5711935446 | Mutualism | Is an interspecific interaction that benefits both species | 20 | |
| 5711944955 | Obligate | One species cannot survive with out the other | 21 | |
| 5711963727 | Facultative | Both species can survive alone | 22 | |
| 5711970807 | Commensalism | One species benefits and the other is apparently unaffected | 23 | |
| 5711977828 | Species diversity | The variety of organisms that make up the community | 24 | |
| 5711990577 | Species richness | The total number of different species in the community | 25 | |
| 5711998896 | Relative abundance | The proportion each species represents of the total individuals in the community | 26 | |
| 5712012741 | Trophic structure | Is the feeding relationships between organisms in a community | 27 | |
| 5712020840 | Food chains | Link trophic levels from producers to top carnivores | 28 | |
| 5712030074 | Food web | A branching food chain with complex trophic interactions | 29 | |
| 5712044619 | Energetic hypothesis | Suggests that length is limited by inefficient energy transfer | 30 | |
| 5712054053 | Dynamic stability hypothesis | Proposes that long food chains are less stable than short ones | 31 | |
| 5712060092 | Dominant species | Are those that are most abundant or have the highest biomass | 32 | |
| 5712069959 | Keystone species | Exert strong control on a community by their ecological roles or niches (mvp) | 33 | |
| 5712085551 | Invasive species | Typically introduced to a new environment by humans often lack predators or disease | 34 | |
| 5712092049 | Foundations species | Cause physical changes in the environment that affect community structure | 35 | |
| 5712104504 | Facilitators | Have positive effects on survival and reproduction of some other species in the community | 36 | |
| 5712125563 | Bottom up model | Community organization proposes a unidirectional influence from lower to higher trophic levels | 37 | |
| 5712155460 | Top down model | (trophic cascade)-Proposes that control comes from the trophic level above | 38 | |
| 5712166454 | Non-equilibrium model | Describes communities constantly changing after being buffeted by disturbances | 39 | |
| 5712215098 | Intermediate disturbance hypothesis | Suggests that moderate levels of disturbance can foster greater diversity than either high or low levels of disturbance | 40 | |
| 5712239591 | Ecological succession | The sequence of community and ecosystem changes after a disturbance | 41 | |
| 5712249387 | Primary succession | Occurs where no coil exists when succession begins | 42 | |
| 5712256956 | Secondary succession | Begins in an area where soil remains after a disturbance | 43 | |
| 5712265648 | Species-area curve | Quantifies the idea that all other factors being equal, a larger geographic area has more species | 44 | |
| 5712277231 | Evapotranspiration | Evaporation of water from soil plus transpiration of water from plants | 45 | |
| 5712286800 | Zoonotic | Pathogens have been transferred from other animals to humans | 46 | |
| 5712294776 | Latitude and area | 2 key factors that affect a community's species diversity | 47 |
