Document


Title

Phenotypic flexibility and genetic adaptation along a gradient of secondary forest succession in the grass Danthonia spicata
Document Type: Journal
Author(s): S. M. Scheiner ; J. A. Teeri
Publication Year: 1986

Cataloging Information

Keyword(s):
adaptation; biomass; Canada; clearcutting; Danthonia; Danthonia spicata; droughts; field experimental fires; fire frequency; fire management; forest management; genetics; grasses; humus; light; litter; Michigan; moisture; overstory; perennial plants; pine hardwood forests; Pinus; plant growth; population ecology; Populus; post fire recovery; reproduction; second growth forests; soil moisture; soil nutrients; succession; wildfires; xeric soils
Region(s):
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 34951
Tall Timbers Record Number: 9239
TTRS Location Status: In-file
TTRS Call Number: Fire File DDW
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

Populations of Danthonia spicata were studied from sites of ages 0, 26, 32, 44, and 69 years after fire in the aspen-Pine forests of northern lower Michigan. Along this gradient the environment changes from unshaded and dry to a shaded, moist pine and hardwood forest. Greenhouse treatments and transplant gardens were used to investigate the extent to which phenotypic flexibility and genetic adaptation were responsible for the persistence of D. spicata across this light and soil moisture gradient. With regard to phenotypic flexibility, we found that individual plants of D. spicata can grow and reproduce in light levels lower than those found at any site in the field. The populations were genetically distinct from each other but the differences were small relative to the range of phenotypic flexibility . Some populations and individuals performed better under high light conditions and all individuals performed equally poorly under low light conditions. A multivariate analysis suggests that genetic drift may have been more important than selection in differentiating the populations. Phenotypic flexibility was shown to be more important than genetic adaptation in explaining the persistence of D. spicata along the successional gradient. Abstract reproduced by permission of The Canadian Journal of Botany.©NRC Canada

Online Link(s):
Citation:
Scheiner, S. M., and J. A. Teeri. 1986. Phenotypic flexibility and genetic adaptation along a gradient of secondary forest succession in the grass Danthonia spicata. Canadian Journal of Botany, v. 64, no. [4], p. 739-747.