Ectomycorrhizal Fungi Facilitate Competitive Interactions Between Tree Taxa: Host Preference, Seedling Recruitment, and Forest Succession by
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چکیده
Ectomycorrhizal Fungi Facilitate Competitive Interactions Between Tree Taxa: Host Preference, Seedling Recruitment, and Forest Succession by Gwendolyn C. Williams Department of Biology Duke University Date:_______________________ Approved: ___________________________ Rytas Vilgalys, Supervisor ___________________________ Paul Manos ___________________________ Daniel Richter ___________________________ Justin Wright ___________________________ Norman Christensen An abstract of a dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Biology in the Graduate School of Duke University
منابع مشابه
Sharing of Diverse Mycorrhizal and Root-Endophytic Fungi among Plant Species in an Oak-Dominated Cool–Temperate Forest
Most terrestrial plants interact with diverse clades of mycorrhizal and root-endophytic fungi in their roots. Through belowground plant-fungal interactions, dominant plants can benefit by interacting with host-specific mutualistic fungi and proliferate in a community based on positive plant-mutualistic fungal feedback. On the other hand, subordinate plant species may persist in the community by...
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Ectomycorrhizal fungi form symbioses with all the major tree species in the boreal forest zone and they are of key importance in nutrient acquisition, plant protection against root pathogens and drought stress. Their diversity and the impacts of forestry practises on these highly important organisms is therefore of great interest. The aim of the study was to describe ectomycorrhizal biodiversit...
متن کاملMulti-host ectomycorrhizal fungi are predominant in a Guinean tropical rainforest and shared between canopy trees and seedlings.
The diversity of ectomycorrhizal (ECM) fungi on adult trees and seedlings of five species, Anthonotha fragrans, Anthonotha macrophylla, Cryptosepalum tetraphyllum, Paramacrolobium coeruleum and Uapaca esculenta, was determined in a tropical rain forest of Guinea. Ectomycorrhizae were sampled within a surface area of 1600 m(2), and fungal taxa were identified by sequencing the rDNA Internal Tran...
متن کاملCompetition-function tradeoffs in ectomycorrhizal fungi
Background. The extent to which ectomycorrhizal fungi mediate primary production, carbon storage, and nutrient remineralization in terrestrial ecosystems depends upon fungal community composition. However, the factors that govern community composition at the root system scale are not well understood. Here, we explore a potential tradeoff between ectomycorrhizal fungal competitive ability and en...
متن کاملAn ectomycorrhizal nitrogen economy facilitates monodominance in a neotropical forest.
Tropical forests are renowned for their high diversity, yet in many sites a single tree species accounts for the majority of the individuals in a stand. An explanation for these monodominant forests remains elusive, but may be linked to mycorrhizal symbioses. We tested three hypotheses by which ectomycorrhizas might facilitate the dominance of the tree, Oreomunnea mexicana, in montane tropical ...
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