DOI: 10.1016/j.foreco.2013.09.017
Scopus记录号: 2-s2.0-84888135925
论文题名: Increased air humidity and understory composition shape short root traits and the colonizing ectomycorrhizal fungal community in silver birch stands
作者: Parts K. ; Tedersoo L. ; Lõhmus K. ; Kupper P. ; Rosenvald K. ; Sõber A. ; Ostonen I.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 720
结束页码: 728
语种: 英语
英文关键词: Climate change
; Ectomycorrhiza
; Free Air Humidity Manipulation (FAHM)
; Hydrophobicity
; Root morphology
; Silver birch
Scopus关键词: Air humidity
; Ectomycorrhizas
; Experimental facilities
; Morphological adaptations
; Morphological parameters
; Root morphology
; Silver birch
; Understory composition
; Climate change
; Forestry
; Hydrophilicity
; Hydrophobicity
; Fungi
; climate change
; community composition
; deciduous tree
; ecosystem function
; ectomycorrhiza
; forest management
; fungus
; grass
; humidity
; hydrophobicity
; molecular analysis
; precipitation (climatology)
; relative abundance
; root colonization
; stand structure
; taxonomy
; understory
; Betula Pubescens
; Forestry
; Fungi
; Water Repellence
; Betula
; Betula pendula
; Poaceae
英文摘要: Climate change is predicted to bring about a rise in precipitation and air humidity at northern latitudes, which could have considerable impact on forest management. This paper investigates the effect of increased air humidity and understory composition on short root morphology and on the relative abundance of colonizing ectomycorrhizal (EcM) fungal associates in silver birch (Betula pendula Roth.) stands. Short root morphological traits of silver birch were analyzed at increased humidity and ambient conditions for two different understories (early-successional grasses and diverse "forest" understory) in three consecutive years (2009-2011). The fungal community was determined in 2010 (after three seasons of misting) using molecular methods. The study was conducted on the Free Air Humidity Manipulation (FAHM) experimental facility established in Estonia. Silver birches responded to the rise in air humidity by forming longer and thinner short roots, which can be interpreted as a morphological adaptation leading to an increase in the absorptive area. The response was stronger when humidification concurred with the species-poor understory of pioneer grasses. The inter- and intra-treatment variation in short root morphological parameters decreased by the third year. Using molecular methods, overall 64 EcM taxonomic units were distinguished. Hydrophilic fungal morphotypes dominated significantly in humidified plots, hydrophobic morphotypes in control plots. Our results suggest that rising air humidity causes a morphological stress response in EcM short roots. Young trees show the ability to adapt to climate change with great plasticity by modifying short root length, diameter and specific root length (SRL). Humidification leads to a shift in the fungal colonizers towards the dominance of hydrophilic taxa, which may alter ecosystem functioning. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66269
Appears in Collections: 影响、适应和脆弱性
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作者单位: Institute of Ecology and Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia
Recommended Citation:
Parts K.,Tedersoo L.,Lõhmus K.,et al. Increased air humidity and understory composition shape short root traits and the colonizing ectomycorrhizal fungal community in silver birch stands[J]. Forest Ecology and Management,2013-01-01,310