期刊
SOIL BIOLOGY & BIOCHEMISTRY
卷 65, 期 -, 页码 141-143出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2013.05.022
关键词
Biogeochemistry; Cenococcum geophilum; C cycling; Decomposition; Ectomycorrhizal fungi; N cycling; Root turnover
类别
资金
- Alfred P. Sloan Foundation
- Department of Energy GREF program
- USDA
- NSF
- DOE [NICCR-DE-FC02 06ER64156]
The turnover of ectomycorrhizal (EM) fungal biomass represents an important litter input into forest biogeochemical cycles. Cenococcum geophilum is a nearly ubiquitous and often abundant EM fungus, making the turnover dynamics of this species relevant and important across forest ecosystems. To better understand the turnover dynamics of C geophilum ectomycorrhizas we examined their persistence using minirhizotron imaging and vitality status using a fluorescein diacetate (FDA) stain and contrasted these results with ectomycorrhizas of other EM fungi. Ectomycorrhizas formed by C. geophilum persisted 4-10 times longer and exhibited contrasting seasonal patterns of vitality compared to ectomycorrhizas of other EM fungi. Together, this suggests that litter resulting from the death of C geophilum ectomycorrhizas is relatively recalcitrant to decay and may disproportionately influence forest biogeochemical cycles by retarding the rate at which carbon and nutrients are cycled. (C) 2013 Elsevier Ltd. All rights reserved.
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