Character displacement is the phenomenon where differences among similar species whose distributions overlap geographically are accentuated in regions where the species co-occur, but are minimized or lost where the species’ distributions do not overlap. This pattern results from evolutionary change driven by biological competition among species for a limited resource (e.g. food).
abstract: I give an overview of the observational and experimental evidence for ecological character displacement in adaptive radiation. Sixty‐one published cases of character displacement involving closely related species (congeners) make up the observational data set. All cases involve divergence, even though parallel and convergent displacement are theoretically possible.
ecological opportunity, adaptive radiation, key innovations, adaptive landscape, character displacement, niche construction Abstract The process of adaptive radiation—the proliferation of species from a sin-gle ancestor and diversiﬁcation into many ecologically different forms—has
Because character displacement can drive speciation and adaptive radiations (Schluter, 2000; Grant and Grant, 2008), understanding what species are especially prone to undergoing character displacement may help explain why some taxonomic groups are more diverse than others. Understanding when character displacement proceeds – and when it does ...
Adaptive radiation and character displacement are phylogenetic patterns that occurred on a very large scale when animals first crawled out onto dry land. They found virgin territory temporarily free of predators and filled with new resources to exploit.
Character Displacement and Adaptive Radiation S5 The appeal of character displacement remained high, nevertheless, despite uncertainty over its importance. While the debates bred skepticism, they also spurred in-terest in locating fresh examples and in applying rigorous tests to cases both new and old. The outcome is that 170
Ecological character displacement is implicit in current views of adaptive radiation, but examples are few. The paucity of cases may be partly a problem of detection: statistical tests require that a consistent pattern of displacement be observed over independent lineages, yet opportunities for such replication may be few.
Ecological character displacement is implicit in current views of adaptive radiation, but examples are few. The paucity of cases may be partly a problem of detection: statistical tests require ...
Start studying biology chapter 22 - multiple choice. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... Adaptive radiation is best described as the (1 point) ... Due to character displacement, two closely related species may differ most morphologically when they (1 point) ...
- methods to study adaptive radiation: 1. hypothetico-deductive model (population limitation, genetic differentiation, ecological differentiation) 2. experimentation using song playbacks and bird models 3. "natural experiment" demonstrating direct character displacement