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Similar below-ground carbon cycling dynamics but contrasting modes of nitrogen cycling between arbuscular mycorrhizal and ectomycorrhizal forests.

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Title: Similar below-ground carbon cycling dynamics but contrasting modes of nitrogen cycling between arbuscular mycorrhizal and ectomycorrhizal forests.
Authors: Lin, Guigang1,2, McCormack, M. Luke1, Ma, Chengen1,2, Guo, Dali1 guodl@igsnrr.ac.cn
Source: New Phytologist. Feb2017, Vol. 213 Issue 3, p1440-1451. 12p. 1 Diagram, 2 Charts, 4 Graphs, 1 Map.
Subjects: Carbon cycle, Biogeochemical cycles, Carbon fixation, Ectomycorrhizal fungi, Mycorrhizal fungi
Abstract: • Compared with ectomycorrhizal (ECM) forests, arbuscular mycorrhizal (AM) forests are hypothesized to have higher carbon (C) cycling rates and a more open nitrogen (N) cycle. • To test this hypothesis, we synthesized 645 observations, including 22 variables related to below-ground C and N dynamics from 100 sites, where AM and ECM forests co-occurred at the same site. • Leaf litter quality was lower in ECM than in AM trees, leading to greater forest floor C stocks in ECM forests. By contrast, AM forests had significantly higher mineral soil C concentrations, and this result was strongly mediated by plant traits and climate. No significant differences were found between AM and ECM forests in C fluxes and labile C concentrations. Furthermore, inorganic N concentrations, net N mineralization and nitrification rates were all higher in AM than in ECM forests, indicating 'mineral' N economy in AM but 'organic' N economy in ECM trees. • AM and ECM forests show systematic differences in mineral vs organic N cycling, and thus mycorrhizal type may be useful in predicting how different tree species respond to multiple environmental change factors. By contrast, mycorrhizal type alone cannot reliably predict below-ground C dynamics without considering plant traits and climate. [ABSTRACT FROM AUTHOR]
Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Similar below-ground carbon cycling dynamics but contrasting modes of nitrogen cycling between arbuscular mycorrhizal and ectomycorrhizal forests.
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Guigang%22">Lin, Guigang</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22McCormack%2C+M%2E+Luke%22">McCormack, M. Luke</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ma%2C+Chengen%22">Ma, Chengen</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Guo%2C+Dali%22">Guo, Dali</searchLink><relatesTo>1</relatesTo><i> guodl@igsnrr.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22New+Phytologist%22">New Phytologist</searchLink>. Feb2017, Vol. 213 Issue 3, p1440-1451. 12p. 1 Diagram, 2 Charts, 4 Graphs, 1 Map.
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  Data: <searchLink fieldCode="DE" term="%22Carbon+cycle%22">Carbon cycle</searchLink><br /><searchLink fieldCode="DE" term="%22Biogeochemical+cycles%22">Biogeochemical cycles</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+fixation%22">Carbon fixation</searchLink><br /><searchLink fieldCode="DE" term="%22Ectomycorrhizal+fungi%22">Ectomycorrhizal fungi</searchLink><br /><searchLink fieldCode="DE" term="%22Mycorrhizal+fungi%22">Mycorrhizal fungi</searchLink>
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  Data: • Compared with ectomycorrhizal (ECM) forests, arbuscular mycorrhizal (AM) forests are hypothesized to have higher carbon (C) cycling rates and a more open nitrogen (N) cycle. • To test this hypothesis, we synthesized 645 observations, including 22 variables related to below-ground C and N dynamics from 100 sites, where AM and ECM forests co-occurred at the same site. • Leaf litter quality was lower in ECM than in AM trees, leading to greater forest floor C stocks in ECM forests. By contrast, AM forests had significantly higher mineral soil C concentrations, and this result was strongly mediated by plant traits and climate. No significant differences were found between AM and ECM forests in C fluxes and labile C concentrations. Furthermore, inorganic N concentrations, net N mineralization and nitrification rates were all higher in AM than in ECM forests, indicating 'mineral' N economy in AM but 'organic' N economy in ECM trees. • AM and ECM forests show systematic differences in mineral vs organic N cycling, and thus mycorrhizal type may be useful in predicting how different tree species respond to multiple environmental change factors. By contrast, mycorrhizal type alone cannot reliably predict below-ground C dynamics without considering plant traits and climate. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1111/nph.14206
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      – Code: eng
        Text: English
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      – SubjectFull: Carbon cycle
        Type: general
      – SubjectFull: Biogeochemical cycles
        Type: general
      – SubjectFull: Carbon fixation
        Type: general
      – SubjectFull: Ectomycorrhizal fungi
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      – SubjectFull: Mycorrhizal fungi
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              Text: Feb2017
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              Y: 2017
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