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Climate, soil mineralogy and mycorrhizal fungi influence soil organic matter fractions in eastern US temperate forests.

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Title: Climate, soil mineralogy and mycorrhizal fungi influence soil organic matter fractions in eastern US temperate forests.
Authors: Lang, Ashley K.1 (AUTHOR) al40@iu.edu, Pett‐Ridge, Jennifer2,3 (AUTHOR), McFarlane, Karis J.4 (AUTHOR), Phillips, Richard P.1 (AUTHOR)
Source: Journal of Ecology. Jun2023, Vol. 111 Issue 6, p1254-1269. 16p.
Subjects: Soil mineralogy, Temperate forests, Mycorrhizal fungi, Forest soils, Organic compounds, Soil fungi
Geographic Terms: United States
Abstract: Identifying the primary controls of particulate (POM) and mineral‐associated organic matter (MAOM) content in soils is critical for determining future stocks of soil carbon (C) and nitrogen (N) across the globe. However, drivers of these soil organic matter fractions are likely to vary among ecosystems in response to climate, soil type and the composition of local biological communities.We tested how soil factors, climate and plant–fungal associations influenced the distribution and concentrations of C and N in MAOM and POM in seven temperate forests in the National Ecological Observatory Network (NEON) across the eastern United States. Samples of upper mineral horizon soil within each forest were collected in plots representing a gradient of dominant tree–mycorrhizal association, allowing us to test how plant and microbial communities influenced POM and MAOM across sites differing in climate and soil conditions.We found that concentrations of C and N in soil organic matter were primarily driven by soil mineralogy, but the relative abundance of MAOM versus POM C was strongly linked to plot‐level mycorrhizal dominance. Furthermore, the effect of dominant tree mycorrhizal type on the distribution of N among POM and MAOM fractions was sensitive to local climate: in cooler sites, an increasing proportion of ectomycorrhizal‐associated trees was associated with lower proportions of N in MAOM, but in warmer sites, we found the reverse. As an indicator of soil carbon age, we measured radiocarbon in the MAOM fraction but found that within and across sites, Δ14C was unrelated to mycorrhizal dominance, climate, or soil factors, suggesting that additional site‐specific factors may be primary determinants of long‐term SOM persistence.Synthesis. Our results indicate that while soil mineralogy primarily controls SOM C and N concentrations, the distribution of SOM among density fractions depends on the composition of vegetation and microbial communities, with these effects varying across sites with distinct climates. We also suggest that within biomes, the age of mineral‐associated soil carbon is not clearly linked to the factors that control concentrations of MAOM C and N. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Ecology 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 164154548
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PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Climate, soil mineralogy and mycorrhizal fungi influence soil organic matter fractions in eastern US temperate forests.
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  Data: <searchLink fieldCode="AR" term="%22Lang%2C+Ashley+K%2E%22">Lang, Ashley K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> al40@iu.edu</i><br /><searchLink fieldCode="AR" term="%22Pett‐Ridge%2C+Jennifer%22">Pett‐Ridge, Jennifer</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22McFarlane%2C+Karis+J%2E%22">McFarlane, Karis J.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Phillips%2C+Richard+P%2E%22">Phillips, Richard P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Ecology%22">Journal of Ecology</searchLink>. Jun2023, Vol. 111 Issue 6, p1254-1269. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Soil+mineralogy%22">Soil mineralogy</searchLink><br /><searchLink fieldCode="DE" term="%22Temperate+forests%22">Temperate forests</searchLink><br /><searchLink fieldCode="DE" term="%22Mycorrhizal+fungi%22">Mycorrhizal fungi</searchLink><br /><searchLink fieldCode="DE" term="%22Forest+soils%22">Forest soils</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+fungi%22">Soil fungi</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22United+States%22">United States</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Identifying the primary controls of particulate (POM) and mineral‐associated organic matter (MAOM) content in soils is critical for determining future stocks of soil carbon (C) and nitrogen (N) across the globe. However, drivers of these soil organic matter fractions are likely to vary among ecosystems in response to climate, soil type and the composition of local biological communities.We tested how soil factors, climate and plant–fungal associations influenced the distribution and concentrations of C and N in MAOM and POM in seven temperate forests in the National Ecological Observatory Network (NEON) across the eastern United States. Samples of upper mineral horizon soil within each forest were collected in plots representing a gradient of dominant tree–mycorrhizal association, allowing us to test how plant and microbial communities influenced POM and MAOM across sites differing in climate and soil conditions.We found that concentrations of C and N in soil organic matter were primarily driven by soil mineralogy, but the relative abundance of MAOM versus POM C was strongly linked to plot‐level mycorrhizal dominance. Furthermore, the effect of dominant tree mycorrhizal type on the distribution of N among POM and MAOM fractions was sensitive to local climate: in cooler sites, an increasing proportion of ectomycorrhizal‐associated trees was associated with lower proportions of N in MAOM, but in warmer sites, we found the reverse. As an indicator of soil carbon age, we measured radiocarbon in the MAOM fraction but found that within and across sites, Δ14C was unrelated to mycorrhizal dominance, climate, or soil factors, suggesting that additional site‐specific factors may be primary determinants of long‐term SOM persistence.Synthesis. Our results indicate that while soil mineralogy primarily controls SOM C and N concentrations, the distribution of SOM among density fractions depends on the composition of vegetation and microbial communities, with these effects varying across sites with distinct climates. We also suggest that within biomes, the age of mineral‐associated soil carbon is not clearly linked to the factors that control concentrations of MAOM C and N. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Ecology 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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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1111/1365-2745.14094
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 1254
    Subjects:
      – SubjectFull: Soil mineralogy
        Type: general
      – SubjectFull: Temperate forests
        Type: general
      – SubjectFull: Mycorrhizal fungi
        Type: general
      – SubjectFull: Forest soils
        Type: general
      – SubjectFull: Organic compounds
        Type: general
      – SubjectFull: Soil fungi
        Type: general
      – SubjectFull: United States
        Type: general
    Titles:
      – TitleFull: Climate, soil mineralogy and mycorrhizal fungi influence soil organic matter fractions in eastern US temperate forests.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Lang, Ashley K.
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            NameFull: Pett‐Ridge, Jennifer
      – PersonEntity:
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            NameFull: McFarlane, Karis J.
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            NameFull: Phillips, Richard P.
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            – D: 01
              M: 06
              Text: Jun2023
              Type: published
              Y: 2023
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              Value: 111
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              Value: 6
          Titles:
            – TitleFull: Journal of Ecology
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