期刊
FUNGAL ECOLOGY
卷 40, 期 -, 页码 62-71出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2018.11.008
关键词
AMF; Fungi; Global change; Mycorrhizae; Community ecology; Fungal ecology; Nitrogen deposition; Biotic invasion; Coastal sage scrub
资金
- Agricultural Experiment Station Hatch Projects [CA-R-PPA-6689-H]
- Center for Conservation Biology at UCR
- California Native Plant Society
A significant challenge for understanding how fungal communities may change in the Anthropocene are the multiple aspects of simultaneous environmental change. To address this challenge, we used a seven-year multi-factorial field experiment in southern California to examine how root-associated fungi respond to aridity, nitrogen deposition, and plant invasions. We hypothesized that all three global change drivers reduce the abundance of arbuscular mycorrhizal fungi responsible for nutrient uptake (edaphophilic AMF), while increasing the abundance of AMF that colonize roots at high rates (rhizophilic AMF). We found that invasive grasses hosted lower abundances of edaphophilic AMF, and higher abundances of rhizophilic AMF and opportunistically parasitic fungi. Aridity reduced overall AMF abundance while N addition altered the allocation of AMF biomass, increasing root colonization while reducing the density of extraradical hyphae. Overall, these results imply that ongoing global change will alter both the composition of AMF and how these fungi interact with plants. (C) 2018 Elsevier Ltd and British Mycological Society. All rights reserved.
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