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  Amensalism (from Greek a~, ‘not’ + Latin mensalis, ‘one who shares the same table’), in the life sciences, is the relationship between two organisms in which one individual is harmed or inhibited by the other. Gause\'s principle of competitive exclusion states that two species cannot live in direct competition (for example, both requiring identical food) because one or the other will have a competitive advantage and will gain the upper hand through natural selection. RB

See also commensalism; niche; parasitism; symbiosis.Further reading Philip Whitfield, The Biology of Parasitism.



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