COMPETITION ON A DIVIDED AND EPHEMERAL RESOURCE - TESTING THE ASSUMPTIONS .2. ASSOCIATION

Tested the assumption of the aggregation model of coexistence on a divided and ephemeral resource that there is no association between species. Data, from laboratory experiments, field experiments and field collections show no evidence of association between species pairs. Out of 157 comparisons, only 8 show significant associatins at the 5% level. The authors incorporate φ into the original aggregation model for two-species competition and into the guild-size extension and examine its influence. Probability refuges and resources refuges are therefore brought together within one conceptual framework. -Authors