D. C. Adams and F. J. Rohif observed character displacement in two species of sa
ID: 274835 • Letter: D
Question
D. C. Adams and F. J. Rohif observed character displacement in two species of salamanders on the east coast of the United States - Plethodon cinereus and Plethodon hoffmani. Their data on body size in the two species appear below. allopatric populations sympatric populations 8 9 Body size (snout-vent length in mm) || il P. cinereus P. hoffmani P. cinereus P. hoffmani SourcesAdam D. C. and F. 1. Rohif. 2000. Ecological character displacement in Plethodon: Biomechanical differences found from a geometric morphometric study Proc. Nat. Acad. Sci. 97: 4106-4111 LOSOS, 3, B. 2000. Ecological character displacement and the study of adaptation Proc. Nat. Acad. Sci. 97: 5693-5695 Drag the labels to their appropriate locations in the table to describe natural selection due to interspecific competition in each population. Labels may be used once, more than once, or not at all. Reset Help directional selection for smaller body size directional selection for larger body size Allopatric populations Sympatric populations P. cinereus P. hoffmani P. cinereus P. hoffmani no natural selection caused by interspecific competition disruptive selection for small and large body sizes stabilizing selection for intermediate body sizeExplanation / Answer
For first graph
Allopatric population : stabilizing selection for both P. cinereus and O. hoffmani
Sympatric poulation: directional body size for P. Cinereus and stabilizing selection for P. hoffmani
For second graph:
Allopatric population : stabilizing selection for both P. cinereus and P. Hoffman.
Sympatric population : directional selection for P. cinereus and stabilizing selection for P. hoffmann
This is an example of character displacement where traits in sympatric population is more diverged as compare to allopatric population.
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