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Prior pesticide exposure reduces drought tolerance in Arctic and temperate springtails—Effects of sequential stressors.

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Title: Prior pesticide exposure reduces drought tolerance in Arctic and temperate springtails—Effects of sequential stressors.
Authors: Konestabo, Heidi Sjursen1,2 (AUTHOR), Leinaas, Hans Petter2 (AUTHOR), van Gestel, Cornelis A M3 (AUTHOR), Borgå, Katrine2 (AUTHOR) katrine.borga@ibv.uio.no
Source: Environmental Toxicology & Chemistry. Jun2026, Vol. 45 Issue 6, p1460-1469. 10p.
Subject Terms: *Imidacloprid, *Drought tolerance, *Temperate climate, *Animal populations, *Pesticide pollution, Collembola, Mortality
Geographic Terms: Arctic regions
Abstract: In the environment, organisms are exposed to a combination of fluctuating environmental conditions as well as anthropogenic toxicants such as pesticides. Fluctuations in temperature can affect the tolerance of terrestrial arthropods to toxicants, but far less is known of drought-influenced changes in the responses to toxicant exposure. Here, we compare mortality responses to drought under two optimal temperatures following prior pesticide exposure in two species of springtails (Collembola); the drought-susceptible Folsomia quadrioculata and the drought-tolerant Hypogastrura viatica. Two Arctic and two temperate populations from each species were exposed to three sublethal concentrations of the neonicotinoid imidacloprid (0.01–0.5—0.1 mg/kg dry soil) at 15 °C for 14 days, followed by different levels of drought stress (100%–85% relative humidity [RH]) at 15 or 20 °C, and survival was assessed. Drought tolerance of all populations from both species at both temperatures was reduced by imidacloprid in a concentration-related manner. Temperate populations of H. viatica subjected to a drought stress of 98% RH showed an increase in mortality with increasing imidacloprid concentration of ∼40% compared with a mortality increase of ∼20% in the Arctic populations. This difference was less pronounced in F. quadrioculata, with an increase in mortality of ∼50% in both temperate and Arctic populations at a drought stress of 98% RH. Drought stress at 20 °C further increased mortality with ∼20% in the drought-tolerant H. viatica from both climatic regions. Thus, local adaptations and species identity should be considered when assessing the effects of combined stressors. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Toxicology & Chemistry is the property of Oxford University Press / USA 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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  Label: Title
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  Data: Prior pesticide exposure reduces drought tolerance in Arctic and temperate springtails—Effects of sequential stressors.
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  Data: <searchLink fieldCode="AR" term="%22Konestabo%2C+Heidi+Sjursen%22">Konestabo, Heidi Sjursen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leinaas%2C+Hans+Petter%22">Leinaas, Hans Petter</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+Gestel%2C+Cornelis+A+M%22">van Gestel, Cornelis A M</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Borgå%2C+Katrine%22">Borgå, Katrine</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> katrine.borga@ibv.uio.no</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Toxicology+%26+Chemistry%22">Environmental Toxicology & Chemistry</searchLink>. Jun2026, Vol. 45 Issue 6, p1460-1469. 10p.
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  Data: *<searchLink fieldCode="DE" term="%22Imidacloprid%22">Imidacloprid</searchLink><br />*<searchLink fieldCode="DE" term="%22Drought+tolerance%22">Drought tolerance</searchLink><br />*<searchLink fieldCode="DE" term="%22Temperate+climate%22">Temperate climate</searchLink><br />*<searchLink fieldCode="DE" term="%22Animal+populations%22">Animal populations</searchLink><br />*<searchLink fieldCode="DE" term="%22Pesticide+pollution%22">Pesticide pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Collembola%22">Collembola</searchLink><br /><searchLink fieldCode="DE" term="%22Mortality%22">Mortality</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22Arctic+regions%22">Arctic regions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In the environment, organisms are exposed to a combination of fluctuating environmental conditions as well as anthropogenic toxicants such as pesticides. Fluctuations in temperature can affect the tolerance of terrestrial arthropods to toxicants, but far less is known of drought-influenced changes in the responses to toxicant exposure. Here, we compare mortality responses to drought under two optimal temperatures following prior pesticide exposure in two species of springtails (Collembola); the drought-susceptible Folsomia quadrioculata and the drought-tolerant Hypogastrura viatica. Two Arctic and two temperate populations from each species were exposed to three sublethal concentrations of the neonicotinoid imidacloprid (0.01–0.5—0.1 mg/kg dry soil) at 15 °C for 14 days, followed by different levels of drought stress (100%–85% relative humidity [RH]) at 15 or 20 °C, and survival was assessed. Drought tolerance of all populations from both species at both temperatures was reduced by imidacloprid in a concentration-related manner. Temperate populations of H. viatica subjected to a drought stress of 98% RH showed an increase in mortality with increasing imidacloprid concentration of ∼40% compared with a mortality increase of ∼20% in the Arctic populations. This difference was less pronounced in F. quadrioculata, with an increase in mortality of ∼50% in both temperate and Arctic populations at a drought stress of 98% RH. Drought stress at 20 °C further increased mortality with ∼20% in the drought-tolerant H. viatica from both climatic regions. Thus, local adaptations and species identity should be considered when assessing the effects of combined stressors. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Toxicology & Chemistry is the property of Oxford University Press / USA 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: 10.1093/etojnl/vgag046
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 1460
    Subjects:
      – SubjectFull: Imidacloprid
        Type: general
      – SubjectFull: Drought tolerance
        Type: general
      – SubjectFull: Temperate climate
        Type: general
      – SubjectFull: Animal populations
        Type: general
      – SubjectFull: Pesticide pollution
        Type: general
      – SubjectFull: Collembola
        Type: general
      – SubjectFull: Mortality
        Type: general
      – SubjectFull: Arctic regions
        Type: general
    Titles:
      – TitleFull: Prior pesticide exposure reduces drought tolerance in Arctic and temperate springtails—Effects of sequential stressors.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Konestabo, Heidi Sjursen
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            NameFull: Leinaas, Hans Petter
      – PersonEntity:
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            NameFull: van Gestel, Cornelis A M
      – PersonEntity:
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            NameFull: Borgå, Katrine
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          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
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              Value: 07307268
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              Value: 45
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              Value: 6
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            – TitleFull: Environmental Toxicology & Chemistry
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