UNI101Y1 Study Guide - Starfish, Pisaster, Organic Compound
16 Feb 2013
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Bio120h lisa zhao 2011 | page 5. Competition occurred primarily below ground under low nutrient conditions, and above ground in fertilized plots. Thus, plants traded off belowground competitive ability for the ability to tolerate saline and anoxic conditions. Superior competitor is limited by its lesser tolerance of stress. Juncus gerardi excludes spartina patens from the upper, less stressful part of the intertidal zone, but can"t withstand the salinity and anoxia of soils lower down. Competition is manifested depending on the characteristics of the interacting species and their habitats. C o mpet it io n may oc c u r t hr o ugh dir ec t in t er fer en c e. Eexxppllooiittaattiivvee ccoommppeettiittiioonn: competition b/w indiv. or species by way of their mutual effects on shared resources. Iinntteerrffeerreennccee ccoommppeettiittiioonn: direct antagonistic interaction b/w indiv. or species competing for resources, usu. by behavioural or chemical means.
