文章基本信息

标题：Composition, structure, and diversity of a chestnut-dominated hardwood forest in Southwestern Wisconsin, USA. (Floristics and Invasive Species 02:00 PM, Saturday, April 5, 2003 Brewer/Frost Science 109 Dr. Brian C. McCarthy-Presiding).
作者：McCarthy, Brian C. ; Keiffer, Carolyn H. ; Rogstad, Steven H. 等
期刊名称：The Ohio Journal of Science
印刷版ISSN：0030-0950
出版年度：2003
期号：March
语种：English
出版社：Ohio Academy of Science
摘要：American chestnut (Castanea dentata (Marshall) Borkh.; Fagaceae) was virtually extirpated as a dominant tree species throughout the Appalachian forest region by the 1930s due to the chestnut blight (Cryphonectria parasitica; Ascomycota). Fortunately, a small number of disjunct chestnut populations escaped infection throughout the Midwest. One such stand, believed to be the largest, exists near La Crosse, Wisconsin. A settler reportedly planted 12 chestnut trees in the early 1900s, of which 11 exist today (the largest being 127 cm in diameter). Since this initial introduction, American chestnut has naturalized--more than 6,000 individuals now dominate this site. The purpose of our study was to establish a long-term study of forest dynamics, conduct a detailed study of the current composition and structure of the vegetation, and assess the regeneration ecology of chestnut. We established 30 permanent plots, 500 [m.sup.2] throughout the stand. Mature trees, saplings, seedlings, shrubs, herbs and groundcover were sampled in each plot. In addition, hemispherical canopy photos and soil samples were taken to describe the microenvironment and regeneration conditions. A total of 27 species were found in the overstory. The total basal area of the stand was 35 [m.sup.2] * [ha.sup.-1], of which chestnut accounted for 43%. Chestnut has acted much like an invasive species in colonizing this oak-hickory forest. This occurrence provides considerable hope for restoration ecologists considering the reintroduction of chestnut into oak forest ecosystems, as disease resistant varieties become available.
关键词：Botany;Chestnut;Chestnuts

Composition, structure, and diversity of a chestnut-dominated hardwood forest in Southwestern Wisconsin, USA. (Floristics and Invasive Species 02:00 PM, Saturday, April 5, 2003 Brewer/Frost Science 109 Dr. Brian C. McCarthy-Presiding).

McCarthy, Brian C. ; Keiffer, Carolyn H. ; Rogstad, Steven H. 等

2:45

American chestnut (Castanea dentata (Marshall) Borkh.; Fagaceae) was virtually extirpated as a dominant tree species throughout the Appalachian forest region by the 1930s due to the chestnut blight (Cryphonectria parasitica; Ascomycota). Fortunately, a small number of disjunct chestnut populations escaped infection throughout the Midwest. One such stand, believed to be the largest, exists near La Crosse, Wisconsin. A settler reportedly planted 12 chestnut trees in the early 1900s, of which 11 exist today (the largest being 127 cm in diameter). Since this initial introduction, American chestnut has naturalized--more than 6,000 individuals now dominate this site. The purpose of our study was to establish a long-term study of forest dynamics, conduct a detailed study of the current composition and structure of the vegetation, and assess the regeneration ecology of chestnut. We established 30 permanent plots, 500 [m.sup.2] throughout the stand. Mature trees, saplings, seedlings, shrubs, herbs and groundcover were sampled in each plot. In addition, hemispherical canopy photos and soil samples were taken to describe the microenvironment and regeneration conditions. A total of 27 species were found in the overstory. The total basal area of the stand was 35 [m.sup.2] * [ha.sup.-1], of which chestnut accounted for 43%. Chestnut has acted much like an invasive species in colonizing this oak-hickory forest. This occurrence provides considerable hope for restoration ecologists considering the reintroduction of chestnut into oak forest ecosystems, as disease resistant varieties become available.

BRIAN C, MCCARTHY [email protected], DEPT OF ENVIRONMENTAL AND PLANT BIOLOGY, OHIO UNIVERSITY, ATHENS OH 45701, CAROLYN H. KEIFFER, DEPT PLANT BIOLOGY, MIAMI UNIVERSITY, AND STEVEN H. ROGSTAD, DEFT BIOLOGICAL SCIENCES, UNIVERSITY OF CINCINNATI.