| A | B |
| durian plant | A tree (Durio zibethinus) of southeast Asia, bearing edible fruit. |
| mutualism | An association between organisms of two different species in which each member benefits |
| convergent evolution | adaptive evolution of superficially similar structures, such as the wings of birds and insects, in unrelated species subjected to similar environments |
| endangered | In danger of extinction throughout all or a significant portion of a species' range |
| congregate | Involving a group |
| deforestation | The act or process of removing trees from or clearing a forest |
| thriving species | Improving, growing, or succeeding steadily |
| alien species | not welcome or wanted; uninvited species |
| keystone species | a species that exerts great influence on an ecosystem |
| native species | originating and living or occurring naturally in an area or environment |
| indicator species | A species used to locate another, less visible species |
| commensalism | a relationship between two species where one species derives a benefit from the relationship and the second species is unaffected by it |
| biodiversity | diversity among and within plant and animal species in an environment |
| richness | abundant, plentiful, or ample: a rich supply; number of different species |
| ecotones | a transitional zone between two communities containing the characteristic species of each |
| edge effects | the natural ecosystem is seriously affected for some distance in from the edge by other events; foresting, fire, etc. |
| interference competition | occurs directly between individuals via aggression etc. |
| exploitation competittion | A form of competition that revolves around the superior ability to gather resources rather than an active interaction among organisms for these |
| predation | a biological interaction where a predator organism feeds on another living organism or organisms known as prey |
| interspecific competition | a form of competition in which individuals of different species vie for the same resource in an ecosystem |
| character displacement | Two closely related species are distinct where they occur together, but where one member of the pair occurs alone it converges toward the second, even to the extent of being nearly identical with it in some characters |
| parasitism | a type of symbiotic relationship between organisms of different species in which one, the parasite, benefits from a prolonged, close association with the other, the host, which is harmed |
| mimicry | one species called the mimic resembles in color, form, and/or behavior another species called the model. In so doing, the mimic acquires some survival advantage |