(a men´ sul ism) • Interaction in which one animal is harmed and the other is unaffected. (Contrast with commensalism, mutualism.)
An interaction in which one organism (or species) adversely affects a second organism (or species), but the second has no effect (good or bad) on the first.
An interspecific interaction in which one species population is inhibited, typically by toxin produced by the other, which is unaffected.
symbiotic relationship in which members of one population inhibit the growth of another population without being affected.
Interaction in which one species is inhibited and the other is unaffected. Examples: penicillin mold accidentally inhibiting bacteria; large trees shading out smaller ones. (Compare to commensalism, competition, mutualism, neutralism, parasitism, symbiosis.)
An inter-organism interaction in which one organism negatively impacts another organism without receiving any direct benefit itself.
Amensalism is a biological interaction, a type of symbiosis, between two species in which one impedes or restricts the success of the other without being affected, positively or negatively, by the presence of the other. Usually this occurs when one organism exudes a chemical compound as part of its normal metabolism that is detrimental to another organism.