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vol. 154, no. 5 the american naturalist november 1999 The Balance of Terror: An Alternative Mechanism for
 

Summary: vol. 154, no. 5 the american naturalist november 1999
The Balance of Terror: An Alternative Mechanism for
Competitive Trade-Offs and Its Implications
for Invading Species
Frederick R. Adler*
Department of Mathematics and Department of Biology, 155
South 1400 East Street, University of Utah, Salt Lake City, Utah 84112
Submitted July 13, 1998; Accepted June 9, 1999
abstract: This article uses models to propose an explanation for
three observations in community ecology: the apparent overreaction
of prey to attack by specialist predators, the existence of a common
trade-off among components of competitive ability in communities
of unrelated competitors, and the ability of invading species to break
the native trade-off. Strategies that increase resource collection ability
are assumed to increase vulnerability to attack by specialistconsumers
according to a vulnerability function. If competitors compete for a
common resource and share the same form of the vulnerability func-
tion, then they are favored to converge on the same evolutionarily
stable level of competitiveness or trade-off curve even if the param-
eters describing their specialized consumers differ. The position of

  

Source: Adler, Fred - Department of Mathematics, University of Utah

 

Collections: Environmental Sciences and Ecology