Journal
NEW PHYTOLOGIST
Volume 185, Issue 3, Pages 803-816Publisher
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1469-8137.2009.03097.x
Keywords
community ecology; extraradical hyphae; fungal biodiversity; invasion biology; Point Reyes National Seashore; quantitative PCR
Categories
Funding
- New England Botanical Club
- Arnold Arboretum of Harvard University
- Mycological Society of America
- US National Science Foundation
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1021606] Funding Source: National Science Foundation
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Despite a growing awareness of the global reach of ectomycorrhizal (EM) fungal introductions, little is known about the fate of introduced EM fungi in novel ranges. Using herbarium specimens, species distribution models, and field collections of sporocarps, root tips and extramatrical mycelia, we assessed the distribution and abundance of the European species Amanita phalloides in North America. There are two distinct ranges of the fungus, one along the West Coast (California to British Columbia) and the second on the East Coast (Maryland to Maine). As predicted by a species distribution model, the West Coast range is larger. Amanita phalloides is more frequently found in native forests on the West Coast than on the East Coast. At Point Reyes Peninsula in California, A. phalloides dominates community sporocarp biomass, and is frequent as root tips. In individual soil cores at Point Reyes, root tips of A. phalloides make up 50% of total root tip biomass. Hyphae of A. phalloides are frequent, but make up only 2% of total hyphal biomass. The contrasting patterns of the distribution and abundance of A. phalloides on the East and West Coasts of North America may influence both its future spread and its impacts.
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