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Ectomycorrhizal Fungal Communities in Urban Parks Are Similar to Those in Natural Forests but Shaped by Vegetation and Park Age.
Appl Environ Microbiol. 2017 Dec 01; 83(23)AE

Abstract

Ectomycorrhizal (ECM) fungi are important mutualists for the growth and health of most boreal trees. Forest age and its host species composition can impact the composition of ECM fungal communities. Although plentiful empirical data exist for forested environments, the effects of established vegetation and its successional trajectories on ECM fungi in urban greenspaces remain poorly understood. We analyzed ECM fungi in 5 control forests and 41 urban parks of two plant functional groups (conifer and broadleaf trees) and in three age categories (10, ∼50, and >100 years old) in southern Finland. Our results show that although ECM fungal richness was marginally greater in forests than in urban parks, urban parks still hosted rich and diverse ECM fungal communities. ECM fungal community composition differed between the two habitats but was driven by taxon rank order reordering, as key ECM fungal taxa remained largely the same. In parks, the ECM communities differed between conifer and broadleaf trees. The successional trajectories of ECM fungi, as inferred in relation to the time since park construction, differed among the conifers and broadleaf trees: the ECM fungal communities changed over time under the conifers, whereas communities under broadleaf trees provided no evidence for such age-related effects. Our data show that plant-ECM fungus interactions in urban parks, in spite of being constructed environments, are surprisingly similar in richness to those in natural forests. This suggests that the presence of host trees, rather than soil characteristics or even disturbance regime of the system, determine ECM fungal community structure and diversity.IMPORTANCE In urban environments, soil and trees improve environmental quality and provide essential ecosystem services. ECM fungi enhance plant growth and performance, increasing plant nutrient acquisition and protecting plants against toxic compounds. Recent evidence indicates that soil-inhabiting fungal communities, including ECM and saprotrophic fungi, in urban parks are affected by plant functional type and park age. However, ECM fungal diversity and its responses to urban stress, plant functional type, or park age remain unknown. The significance of our study is in identifying, in greater detail, the responses of ECM fungi in the rhizospheres of conifer and broadleaf trees in urban parks. This will greatly enhance our knowledge of ECM fungal communities under urban stresses, and the findings can be utilized by urban planners to improve urban ecosystem services.

Authors+Show Affiliations

Department of Environmental Sciences, University of Helsinki, Lahti, Finland nan.hui@helsinki.fi.Department of Environmental Sciences, University of Helsinki, Lahti, Finland.Department of Environmental Sciences, University of Helsinki, Lahti, Finland.Division of Biology, Kansas State University, Manhattan, Kansas, USA.Department of Environmental Sciences, University of Helsinki, Lahti, Finland.Department of Environmental Sciences, University of Helsinki, Lahti, Finland.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28970220

Citation

Hui, Nan, et al. "Ectomycorrhizal Fungal Communities in Urban Parks Are Similar to Those in Natural Forests but Shaped By Vegetation and Park Age." Applied and Environmental Microbiology, vol. 83, no. 23, 2017.
Hui N, Liu X, Kotze DJ, et al. Ectomycorrhizal Fungal Communities in Urban Parks Are Similar to Those in Natural Forests but Shaped by Vegetation and Park Age. Appl Environ Microbiol. 2017;83(23).
Hui, N., Liu, X., Kotze, D. J., Jumpponen, A., Francini, G., & Setälä, H. (2017). Ectomycorrhizal Fungal Communities in Urban Parks Are Similar to Those in Natural Forests but Shaped by Vegetation and Park Age. Applied and Environmental Microbiology, 83(23). https://doi.org/10.1128/AEM.01797-17
Hui N, et al. Ectomycorrhizal Fungal Communities in Urban Parks Are Similar to Those in Natural Forests but Shaped By Vegetation and Park Age. Appl Environ Microbiol. 2017 Dec 1;83(23) PubMed PMID: 28970220.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ectomycorrhizal Fungal Communities in Urban Parks Are Similar to Those in Natural Forests but Shaped by Vegetation and Park Age. AU - Hui,Nan, AU - Liu,Xinxin, AU - Kotze,D Johan, AU - Jumpponen,Ari, AU - Francini,Gaia, AU - Setälä,Heikki, Y1 - 2017/11/16/ PY - 2017/08/15/received PY - 2017/09/21/accepted PY - 2017/10/4/pubmed PY - 2017/12/15/medline PY - 2017/10/4/entrez KW - anthropogenic disturbance KW - ectomycorrhizal fungal community KW - park age KW - urban ecology KW - urban park KW - vegetation type JF - Applied and environmental microbiology JO - Appl. Environ. Microbiol. VL - 83 IS - 23 N2 - Ectomycorrhizal (ECM) fungi are important mutualists for the growth and health of most boreal trees. Forest age and its host species composition can impact the composition of ECM fungal communities. Although plentiful empirical data exist for forested environments, the effects of established vegetation and its successional trajectories on ECM fungi in urban greenspaces remain poorly understood. We analyzed ECM fungi in 5 control forests and 41 urban parks of two plant functional groups (conifer and broadleaf trees) and in three age categories (10, ∼50, and >100 years old) in southern Finland. Our results show that although ECM fungal richness was marginally greater in forests than in urban parks, urban parks still hosted rich and diverse ECM fungal communities. ECM fungal community composition differed between the two habitats but was driven by taxon rank order reordering, as key ECM fungal taxa remained largely the same. In parks, the ECM communities differed between conifer and broadleaf trees. The successional trajectories of ECM fungi, as inferred in relation to the time since park construction, differed among the conifers and broadleaf trees: the ECM fungal communities changed over time under the conifers, whereas communities under broadleaf trees provided no evidence for such age-related effects. Our data show that plant-ECM fungus interactions in urban parks, in spite of being constructed environments, are surprisingly similar in richness to those in natural forests. This suggests that the presence of host trees, rather than soil characteristics or even disturbance regime of the system, determine ECM fungal community structure and diversity.IMPORTANCE In urban environments, soil and trees improve environmental quality and provide essential ecosystem services. ECM fungi enhance plant growth and performance, increasing plant nutrient acquisition and protecting plants against toxic compounds. Recent evidence indicates that soil-inhabiting fungal communities, including ECM and saprotrophic fungi, in urban parks are affected by plant functional type and park age. However, ECM fungal diversity and its responses to urban stress, plant functional type, or park age remain unknown. The significance of our study is in identifying, in greater detail, the responses of ECM fungi in the rhizospheres of conifer and broadleaf trees in urban parks. This will greatly enhance our knowledge of ECM fungal communities under urban stresses, and the findings can be utilized by urban planners to improve urban ecosystem services. SN - 1098-5336 UR - https://www.unboundmedicine.com/medline/citation/28970220/Ectomycorrhizal_Fungal_Communities_in_Urban_Parks_Are_Similar_to_Those_in_Natural_Forests_but_Shaped_by_Vegetation_and_Park_Age_ L2 - http://aem.asm.org/cgi/pmidlookup?view=long&pmid=28970220 DB - PRIME DP - Unbound Medicine ER -