Aspen-associated mycorrhizal fungal production and respiration as a function of changing CO2, O3 and climatic variables |
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| Affiliation: | 1. Michigan Technological University, Forest Resources and Environmental Sciences, 1400 Townsend Drive, Houghton, MI 49931, USA;2. Northeastern Illinois University, Biology Department, 5500 North Saint Louis Avenue, Chicago, IL 60625, USA;3. School of the Art Institute of Chicago, Liberal Arts, 112 South Michigan Avenue, Chicago, IL 60603, USA;4. The Field Museum of Natural History, Botany Department, 1400 South Lake Shore Drive, Chicago, IL 60605, USA;5. University of New Hampshire, Department of Natural Resources & the Environment, 128 Main Street, Durham, NH 03824, USA;6. Argonne National Laboratory, Biosciences Division, 9700 South Cass Avenue, Argonne, IL 60439, USA;7. US Forest Service, Northern Research Station, Forestry Sciences Laboratory, 410 MacInnes Drive, Houghton, MI 49931, USA;1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China;3. Institute of Ecology, Key Laboratory of Agrometeorology of Jiangsu Province, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China;4. Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30, Gothenburg, Sweden;1. CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Key Laboratory of Stable Isotope Techniques and Applications, Liaoning Province, Shenyang, 110016, China;4. College of Environment, Shenyang University, 110044, China;5. School of Land and Resources, China West Normal University, Nanchong, 637009, China;6. Swiss Federal Research Institute WSL, Birmensdorf, 8903, Switzerland;7. Shenyang Arboretum, Chinese Academy of Sciences, Shenyang, 110016, China;8. SwissForestLab, Birmensdorf, 8903, Switzerland;9. Erguna Forest-Steppe Ecotone Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China;10. Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China;1. Department of Mathematics and Physics, Catholic University of Brescia, via dei Musei 41, Brescia, Italy;2. Département de Gestion des Ressources Naturelles Renouvelables, Université de Lubumbashi, Democratic Republic of the Congo;1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China;2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;3. Institute of Ecology, Nanjing University of Information Science & Technology, Nanjing 210044, China;1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;2. Stockbridge School, University of Massachusetts, Amherst, MA 01003, USA;3. Hazardous Air Pollutants Lab, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;4. Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo 315830, China |
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| Abstract: | The relationships of mycorrhizal fungal respiration and productivity to climate and atmospheric chemistry remain under characterized. We quantified mycorrhizal sporocarp and hyphal respiration, as well as growing season net hyphal production, under ambient and elevated carbon dioxide (CO2) and ozone (O3) in relation to natural temperature and moisture variation. Hyphal respiration did not respond significantly to elevated CO2 and O3. Sporocarp respiration was affected by temperature and moisture content while hyphal respiratory response to temperature was undetected over the narrower range of soil temperatures captured. Hyphal respiration comprised 31 % of soil respiration, and the ratio of hyphal respiration to soil respiration declined with elevated CO2. Hyphal biomass was reduced under all treatments though not statistically significant. Given the large fraction of soil respiration represented by mycorrhizal fungi and its sensitivity to climate, a small change in fungal respiration could strongly affect carbon budgets and cycling under climate change. |
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| Keywords: | Carbon dioxide Mycorrhizal fungi Ozone Productivity Respiration |
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