2015
DOI: 10.1111/ddi.12304
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Testing the co‐invasion hypothesis: ectomycorrhizal fungal communities onAlnus glutinosaandSalix fragilisin New Zealand

Abstract: AimIt has been proposed that co‐invasion with ectomycorrhizal (EM) fungi is a common mechanism by which non‐indigenous trees overcome symbiont limitation, yet virtually all prior evidence has come from a single plant family, the Pinaceae. We tested the co‐invasion hypothesis by examining the EM fungal communities associated with a specialized host, Alnus glutinosa (black alder), and a generalist host, Salix fragilis (crack willow), in New Zealand, where both trees are invasive. We aimed to find out if these tw… Show more

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Cited by 69 publications
(41 citation statements)
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References 65 publications
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“…Specifically, the presence, composition, and origin of ectomycorrhizal fungal associated with the invasive Douglas-fir (Pseudotsuga menziesii ) are each influenced by the neighborhood being invaded. In contrast to previous studies suggesting that the invasion success of Pinus, Alnus, and Salix depend largely on co-invading fungi (Nun˜ez et al 2009, Dickie et al 2010, Bogar et al 2015, we observed a richer array of interactions including coinvasion, cosmopolitan associations, and novel associations of invasive P. menziesii with endemic New Zealand ectomycorrhizal fungi. These findings suggest that biological invasions must be studied under multiple ecological contexts to understand the relative importance of co-invasion and novel interactions in invasions.…”
Section: Discussioncontrasting
confidence: 99%
See 1 more Smart Citation
“…Specifically, the presence, composition, and origin of ectomycorrhizal fungal associated with the invasive Douglas-fir (Pseudotsuga menziesii ) are each influenced by the neighborhood being invaded. In contrast to previous studies suggesting that the invasion success of Pinus, Alnus, and Salix depend largely on co-invading fungi (Nun˜ez et al 2009, Dickie et al 2010, Bogar et al 2015, we observed a richer array of interactions including coinvasion, cosmopolitan associations, and novel associations of invasive P. menziesii with endemic New Zealand ectomycorrhizal fungi. These findings suggest that biological invasions must be studied under multiple ecological contexts to understand the relative importance of co-invasion and novel interactions in invasions.…”
Section: Discussioncontrasting
confidence: 99%
“…Novel associations between nonnative planted trees and native fungi have been previously observed (Parlade´et al 1995, Jairus et al 2011, Trocha et al 2012, Bahram et al 2013), though not for P. menziesii in New Zealand (Chu-Chou and Grace 1987), but no prior studies of invasive trees have found novel associations with endemic ectomycorrhizal fungi (Dickie et al 2010, Nun˜ez and Dickie 2014, Bogar et al 2015. Novel associations in P. menziesii may, in part, reflect the tree's broad receptivity to a diverse range of fungi.…”
Section: Origins Of Ectomycorrhizal Fungimentioning
confidence: 90%
“…Because these hosts were historically present at both locations before anthropogenic disturbance events, it appears the current S. subaureus–Quercus associations represent carryover from past host presence. This pattern echoes other studies highlighting the role of neighborhood effects in structuring ECM fungal host specificity (Bogar & Kennedy, ; Bogar et al ., ), but, because S. subaureus fruiting body and mycorrhizas were found in angiosperm‐only forests where Pinaceae hosts have long been locally extirpated, the spore germination triggers or mycelial inoculum originating from Pinaceae hosts cannot be considered a neighborhood effect in the traditional definition. Instead, the establishment of new S. subaureus colonies appears to depend on triggers provided by hosts long absent from the system, suggesting that neighborhood effects should not only be viewed in light of the current host community structure, but as a function of host community change over time.…”
Section: Discussionmentioning
confidence: 99%
“…The few studies of other alien ectomycorrhizal trees, including Eucalyptus (Diez 2005) , Pseudotsuga (Moeller et al 2015), Salix and Alnus (Bogar et al 2015) suggest that co-invasion with a reduced fungal community from the native range is widespread, although the identity of co-invading fungi may vary with alien tree identity.…”
Section: Introductionmentioning
confidence: 99%