Experimental Sympatric Populations of Clarkia

Autor:	Harlan Lewis
Rok vydání:	1961
Předmět:	biology Range (biology) media_common.quotation_subject Clarkia lingulata Growing season biology.organism_classification Lingulata Sympatric speciation Clarkia Botany Reproduction Ecology Evolution Behavior and Systematics media_common Hybrid
Zdroj:	The American Naturalist. 95:155-168
ISSN:	1537-5323 0003-0147
DOI:	10.1086/282173
Popis:	Clarkia lingulata is a tetrasomic derivative of C. biloba. It occurs locally at the southern limit of distribution of the parental species. They cross readily but the hybrids are essentially sterile. When first studied, they were found to occur in adjacent but not in mixed colonies. Since then, C. lingulata has extended its range and has become established at the margin of an adjacent colony of C. biloba. Experimental sympatric populations were established by sowing a mixture of the two species in selected sites south of their natural area of distribution. Populations in the driest sites died out rapidly and showed little or no reproduction; in other sites reproduction has been evident and the populations still persist after five generations. In these artificial populations, C. lingulata has consistently matured about two weeks earlier than C. biloba. This suggests that C. lingulata is adapted to a shorter growing season than C. biloba, and may explain the occurrence of C. lingulata at the margin of distr...
Databáze:	OpenAIRE
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