Low diversity and high host preference of ectomycorrhizal fungi in Western Amazonia, a neotropical biodiversity hotspot

Tedersoo, Leho; Sadam, Ave; Zambrano, Milton; Valencia, Renato; Bahram, Mohammad

doi:10.1038/ismej.2009.131

Cited by 162 publications

(153 citation statements)

References 44 publications

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“…For example, the high relative abundance of the Russulales and Thelophorales in the forest EcM fungal communities appears to be a generalized phenomenon, as these lineages are also abundant in other tropical EcM surveys from the Neotropics and the African tropics [85][86][87], as well as in temperate and boreal EcM forests [57,88]. In other studies from dipterocarp forests, the Russulales and Thelophorales were prevalent in root tips [34,89,90], and the Russulales were abundant in sporocarp surveys, implying some correspondence in taxonomic composition between bulk soil, root tip, and fruiting body data.…”

Section: Discussionmentioning

confidence: 99%

Responses of Soil Fungi to Logging and Oil Palm Agriculture in Southeast Asian Tropical Forests

et al. 2014

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Human land use alters soil microbial composition and function in a variety of systems, although few comparable studies have been done in tropical forests and tropical agricultural production areas. Logging and the expansion of oil palm agriculture are two of the most significant drivers of tropical deforestation, and the latter is most prevalent in Southeast Asia. The aim of this study was to compare soil fungal communities from three sites in Malaysia that represent three of the most dominant land-use types in the Southeast Asia tropics: a primary forest, a regenerating forest that had been selectively logged 50 years previously, and a 25-year-old oil palm plantation. Soil cores were collected from three replicate plots at each site, and fungal communities were sequenced using the Illumina platform. Extracellular enzyme assays were assessed as a proxy for soil microbial function. We found that fungal communities were distinct across all sites, although fungal composition in the regenerating forest was more similar to the primary forest than either forest community was to the oil palm site. Ectomycorrhizal fungi, which are important associates of the dominant Dipterocarpaceae tree family in this region, were compositionally distinct across forests, but were nearly absent from oil palm soils. Extracellular enzyme assays indicated that the soil ecosystem in oil palm plantations experienced altered nutrient cycling dynamics, but there were few differences between regenerating and primary forest soils. Together, these results show that logging and the replacement of primary forest with oil palm plantations alter fungal community and function, although forests regenerating from logging had more similarities with primary forests in terms of fungal composition and nutrient cycling potential. Since oil palm agriculture is currently the mostly rapidly expanding equatorial crop and logging is pervasive across tropical ecosystems, these findings may have broad applicability.

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Section: Discussionmentioning

confidence: 99%

Responses of Soil Fungi to Logging and Oil Palm Agriculture in Southeast Asian Tropical Forests

et al. 2014

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“…All global singletons (i.e., OTUs represented by only one read in the whole data set) were eliminated to avoid any artifacts that could be attributed to sequencing errors (Tedersoo et al. 2010) and to improve the accuracy of diversity estimates (Ihrmark et al. 2012).…”

Section: Methodsmentioning

confidence: 99%

“…2010; Tedersoo et al. 2010; Murata et al. 2013), and tree species identity is increasingly recognized as a key factor shaping EM fungal communities (Smith et al.…”

Section: Introductionmentioning

confidence: 99%

High richness of ectomycorrhizal fungi and low host specificity in a coastal sand dune ecosystem revealed by network analysis

Roy‐Bolduc

Laliberté

Hijri

2015

Ecology and Evolution

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Ectomycorrhizal (EM) fungi are ubiquitous in temperate and boreal forests, comprising over 20,000 species forming root symbiotic associations with Pinaceae and woody angiosperms. As much as 100 different EM fungal species can coexist and interact with the same tree species, forming complex multispecies networks in soils. The degree of host specificity and structural properties of these interaction networks (e.g., nestedness and modularity) may influence plant and fungal community assembly and species coexistence, yet their structure has been little studied in northern coniferous forests, where trees depend on EM fungi for nutrient acquisition. We used high‐throughput sequencing to characterize the composition and diversity of bulk soil and root‐associated fungal communities in four co‐occurring Pinaceae in a relic foredune plain located at Îles de la Madeleine, Québec, Canada. We found high EM fungal richness across the four hosts, with a total of 200 EM operational taxonomic units (OTUs), mainly belonging to the Agaricomycetes. Network analysis revealed an antinested pattern in both bulk soil and roots EM fungal communities. However, there was no detectable modularity (i.e., subgroups of interacting species) in the interaction networks, indicating a low level of specificity in these EM associations. In addition, there were no differences in EM fungal OTU richness or community structure among the four tree species. Limited shared resources and competitive exclusion typically restrict the number of taxa coexisting within the same niche. As such, our finding of high EM fungal richness and low host specificity highlights the need for further studies to determine the mechanisms enabling such a large number of EM fungal species to coexist locally on the same hosts.

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“…Determinants of EM fungal community composition remain poorly understood in tropical forests. For example, there is conflicting evidence regarding host specificity in tropical EM fungal communities (e.g., for evidence of host preference, see Tedersoo et al 2008, 2010aand Morris et al 2009; for evidence of low host specificity, see Diédhiou et al 2010;Tedersoo et al 2011;andSmith et al 2011, 2013). Similarly, the influence of soil type on EM fungal community composition remains unresolved, in part because EM fungal communities associated with the same host species have rarely been studied across a range of soil conditions.…”

Section: Original Papermentioning

confidence: 99%

Variation in ectomycorrhizal fungal communities associated with Oreomunnea mexicana (Juglandaceae) in a Neotropical montane forest

et al. 2015

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Low diversity and high host preference of ectomycorrhizal fungi in Western Amazonia, a neotropical biodiversity hotspot

Cited by 162 publications

References 44 publications

Responses of Soil Fungi to Logging and Oil Palm Agriculture in Southeast Asian Tropical Forests

Responses of Soil Fungi to Logging and Oil Palm Agriculture in Southeast Asian Tropical Forests

High richness of ectomycorrhizal fungi and low host specificity in a coastal sand dune ecosystem revealed by network analysis

Variation in ectomycorrhizal fungal communities associated with Oreomunnea mexicana (Juglandaceae) in a Neotropical montane forest

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