Root Diseases and Exotic Ecosystems: Implications for Long-Term Site Productivity

Conference · Mon Sep 01 04:00:00 EDT 1997

OSTI ID:807867

Otrosina, W. J. ^[1]; Garbelotto, M.

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1. USDA Forest Service, Savannah River

Management activities and various land uses have taken place recently that have dramatically altered edaphic and environmental conditions under which forest tree species and ecosystems have evolved. Sequoia giganteum stands, fire suppression in this fire dependent ecosystem has resulted in increased mortality due to Heterobasidion annosum. On hypothesis is that fire suppression results in increased encroachment of true firs, easily infected by S-group Heterobasidion annosum, thereby transferring the disease via root contacts with S. giganteum. Existence of a hybrid with S and P ISG's of H. annosum may be evidence for anthropogenic influences on evolutionary pathways in this pathogen.

• Research Organization: USDA Forest Service, Savannah River, New Ellenton, SC (United States)
• Sponsoring Organization: USDA; USDOE
• DOE Contract Number: AI09-76SR00056
• OSTI ID: 807867
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ANTHROPOGENIC INFLUENCES
BASIDOMYCETES
DISEASES
ECOSYSTEMS
EDAPHIC
EVOLUTIONARY PATHWAYS
FIRS
FIVE DEPENDENT ECOSYSTEM
FOREST ECOSYSTEM
FORESTS
HETEROBASIDION ANNOSUM
HOSTS
HYPOTHESIS
ISG
LAND USE
LEPTOGRAPHIUM
LONGLEAF PINE
MANAGEMENT
MORTALITY
PATHOGEN
PRODUCTIVITY
ROOT DISEASE FUNGI
S-GROUP
SEQUOIA GIGANTEUM
TREES