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Volcanic soils alleviate the allelopathic capacity of Empetrum nigrum in degraded tundra ecosystems.

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Title: Volcanic soils alleviate the allelopathic capacity of Empetrum nigrum in degraded tundra ecosystems.
Authors: Ryde, Ingvild1 (AUTHOR), Kristinsdóttir, Jóhanna F.1 (AUTHOR), Halmová, Marika1,2 (AUTHOR), Baussay, Augustin3,4 (AUTHOR), Anne Bråthen, Kari5 (AUTHOR), Neilson, Elizabeth H. J.3 (AUTHOR) en@plen.ku.dk, Jónsdóttir, Ingibjörg S.1 (AUTHOR)
Source: Oikos. Oct2025, Vol. 2025 Issue 10, p1-14. 14p.
Subjects: Volcanic soils, Allelopathy, Tundra ecology, Shrubs, Land degradation, Soil classification, Germination, Root growth
Geographic Terms: Iceland
Abstract: Land degradation due to unsustainable land use is of major concern worldwide and recovery is often slow. A potential mechanism behind slow recovery of degraded ecosystems is the retarding impacts of allelopathic plant species on the establishment of species that might facilitate the recovery process. However, the strength of the retarding impact may depend on soil type. In this study, we investigated the potential role of an abundant, evergreen and allelopathic dwarf shrub, Empetrum nigrum, in trapping tundra ecosystems in a degraded state in Iceland after centuries of unsustainable land use. We first ran a series of bioassays to assess the potential allelopathic legacy effects of the Empetrum‐associated volcanic soils (Andosol and Vitrisol) on seed germination and root elongation of the common grass species Festuca richardsonii in comparison with Empetrum‐associated non‐volcanic Histosol and Podzol soil types. Then we assessed the Empetrum leaf–soil interactions for all soil types using leaves from a degraded site in Iceland. We found no potential allelopathic legacy effects of Empetrum‐associated volcanic soils, whereas the non‐volcanic soils negatively impacted Festuca root elongation. Empetrum leaves alone affected both seed germination and root elongation. These effects were strongly alleviated by the volcanic soils, but not by the non‐volcanic soils. We conclude that abundant allelopathic plant species may significantly contribute to trapping tundra ecosystems in a degraded state, but the strength of this trapping mechanism depends on the soil environment. [ABSTRACT FROM AUTHOR]
Copyright of Oikos 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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PubType: Academic Journal
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  Data: Volcanic soils alleviate the allelopathic capacity of Empetrum nigrum in degraded tundra ecosystems.
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  Data: <searchLink fieldCode="AR" term="%22Ryde%2C+Ingvild%22">Ryde, Ingvild</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kristinsdóttir%2C+Jóhanna+F%2E%22">Kristinsdóttir, Jóhanna F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Halmová%2C+Marika%22">Halmová, Marika</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Baussay%2C+Augustin%22">Baussay, Augustin</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Anne+Bråthen%2C+Kari%22">Anne Bråthen, Kari</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Neilson%2C+Elizabeth+H%2E+J%2E%22">Neilson, Elizabeth H. J.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> en@plen.ku.dk</i><br /><searchLink fieldCode="AR" term="%22Jónsdóttir%2C+Ingibjörg+S%2E%22">Jónsdóttir, Ingibjörg S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Oikos%22">Oikos</searchLink>. Oct2025, Vol. 2025 Issue 10, p1-14. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Volcanic+soils%22">Volcanic soils</searchLink><br /><searchLink fieldCode="DE" term="%22Allelopathy%22">Allelopathy</searchLink><br /><searchLink fieldCode="DE" term="%22Tundra+ecology%22">Tundra ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Shrubs%22">Shrubs</searchLink><br /><searchLink fieldCode="DE" term="%22Land+degradation%22">Land degradation</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+classification%22">Soil classification</searchLink><br /><searchLink fieldCode="DE" term="%22Germination%22">Germination</searchLink><br /><searchLink fieldCode="DE" term="%22Root+growth%22">Root growth</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Iceland%22">Iceland</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Land degradation due to unsustainable land use is of major concern worldwide and recovery is often slow. A potential mechanism behind slow recovery of degraded ecosystems is the retarding impacts of allelopathic plant species on the establishment of species that might facilitate the recovery process. However, the strength of the retarding impact may depend on soil type. In this study, we investigated the potential role of an abundant, evergreen and allelopathic dwarf shrub, Empetrum nigrum, in trapping tundra ecosystems in a degraded state in Iceland after centuries of unsustainable land use. We first ran a series of bioassays to assess the potential allelopathic legacy effects of the Empetrum‐associated volcanic soils (Andosol and Vitrisol) on seed germination and root elongation of the common grass species Festuca richardsonii in comparison with Empetrum‐associated non‐volcanic Histosol and Podzol soil types. Then we assessed the Empetrum leaf–soil interactions for all soil types using leaves from a degraded site in Iceland. We found no potential allelopathic legacy effects of Empetrum‐associated volcanic soils, whereas the non‐volcanic soils negatively impacted Festuca root elongation. Empetrum leaves alone affected both seed germination and root elongation. These effects were strongly alleviated by the volcanic soils, but not by the non‐volcanic soils. We conclude that abundant allelopathic plant species may significantly contribute to trapping tundra ecosystems in a degraded state, but the strength of this trapping mechanism depends on the soil environment. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Oikos 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: 10.1002/oik.11336
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 1
    Subjects:
      – SubjectFull: Volcanic soils
        Type: general
      – SubjectFull: Allelopathy
        Type: general
      – SubjectFull: Tundra ecology
        Type: general
      – SubjectFull: Shrubs
        Type: general
      – SubjectFull: Land degradation
        Type: general
      – SubjectFull: Soil classification
        Type: general
      – SubjectFull: Germination
        Type: general
      – SubjectFull: Root growth
        Type: general
      – SubjectFull: Iceland
        Type: general
    Titles:
      – TitleFull: Volcanic soils alleviate the allelopathic capacity of Empetrum nigrum in degraded tundra ecosystems.
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              M: 10
              Text: Oct2025
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