Skip to Main Content
Due to a lapse in federal funding, this USDA website will not be actively updated. Once funding has been reestablished, online operations will continue.
Diseases of Forest Trees: Consequences of Exotic Ecosystems?Author(s): William J. Otrosina
Source: Proceedings of the Ninth Biennial Southern Silvicultural Research COnference. USDA Forest Service. June 1998.
Publication Series: Miscellaneous Publication
PDF: View PDF (129 KB)
DescriptionMuch attention is now given to risks and impacts of exotic pest introductions in forest ecosystems. This concern is for good reason because, once introduced, an exotic pathogen or insect encounters little resistance in the native plant population and can produce catastrophic losses in relatively short periods of time. Most native fungal pathogens of forest trees have co-evolved for eons with their hosts and have reached a sort of balance between them and populations of susceptible tree species. Recent studies on various forest types have indicated a higher incidence of certain fungal Pathogens than were previously thought to occur. These pathogens are either the type not normally thought of as highly virulent or are those that have not been previously reported as a serious problem on a particular host. For example, Pathogenic fungi belonging to both the Leptographium complex and Heferobasidion annosum, are associated with mortality afier prescribed burning in certain longleaf pine stands. Yet, this tree species has traditionally been rankd as highly tolerant to these fungi. Could these observations reflect some manifestation of "exotic ecosystems," whereby the conditions under which particular tree species evolved are no longer present or are altered in some way that increases their susceptibility to these fungi? With the current emphasis on ecosystem restoration and alternative silviculturel regimes, it is critical to address such questions in order to avert losses in forest productivity.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationOtrosina, William J. 1998. Diseases of Forest Trees: Consequences of Exotic Ecosystems?. Proceedings of the Ninth Biennial Southern Silvicultural Research COnference. USDA Forest Service. June 1998.
- Root disease and exotic ecosystems: implications for long-term site productivity
- A first comprehensive census of fungi in soil reveals both hyperdiversity and fine-scale niche partitioning
- A review of the role of fungi in wood decay of forest ecosystems
XML: View XML