Different response–effect trait relationships underlie contrasting responses to two chemical stressors

Christoph Mensens, Frederik De Laender, Colin R. Janssen, Koen Sabbe, Marleen De Troch

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

Trait-based approaches evaluate ecosystem functioning under environmental change by relating traits predicting changes in species densities (response traits) to traits driving ecosystem functioning (effect traits). Stressors can, however, affect ecosystem functioning not only by altering species densities but also by directly changing species effect traits. We first identified the response traits predicting the cell density of 18 marine benthic diatom strains along gradients of two chemical stressors (a pesticide and a metal, atrazine and copper). We then tested if response traits could predict stressor-induced changes in ecosystem functioning, i.e. changes in the effect traits driving the diatoms’ potential contribution to primary production, sediment stabilization and energy content in intertidal systems. Finally, we examined if changes in density and changes in ecosystem functioning were correlated, to assess whether species capable of growing under stressful conditions could maintain their contribution to ecosystem functioning. The relationship between response traits and stressor-induced changes in density and ecosystem functioning was different depending on stressor type: a set of intercorrelated morphological traits predicted changes in both density and ecosystem functioning under metal stress, with large cells being more stress resistant. Changes in density and changes in ecosystem functioning were positively related: diatoms whose density was least affected by the metal were also able to sustain functioning under metal exposure. In contrast, the capacity for mixotrophic growth predicted changes in density, but not changes in ecosystem functioning under pesticide stress. Pesticide effects on density and on ecosystem functioning were negatively related for energy content and sediment stabilization, indicating a limited capacity of pesticide-tolerant diatoms to maintain their contribution to ecosystem functioning. Synthesis. Ecosystem functioning under stress can depend on whether the response traits driving changes in species densities also predict direct stress effects on the species’ contribution to functioning. Based on our results, we expect a disproportionate loss of functioning when traits driving species densities do not allow to maintain ecosystem functioning under stress.

langueAnglais
Pages1598-1609
Nombre de pages12
journalJournal of Ecology
Volume105
Numéro6
Les DOIs
étatPublié - 1 nov. 2017

Empreinte digitale

ecosystem
effect
chemical
ecosystems
diatom
pesticide
metal
Bacillariophyceae
pesticides
metals
stabilization
sediment
energy
energy content
sediments
cells
ecosystem approach
atrazine
primary production
environmental change

mots-clés

    Citer ceci

    Mensens, Christoph ; De Laender, Frederik ; Janssen, Colin R. ; Sabbe, Koen ; De Troch, Marleen. / Different response–effect trait relationships underlie contrasting responses to two chemical stressors. Dans: Journal of Ecology. 2017 ; Vol 105, Numéro 6. p. 1598-1609
    @article{7f8d797966414e0a98786829a5c273b6,
    title = "Different response–effect trait relationships underlie contrasting responses to two chemical stressors",
    abstract = "Trait-based approaches evaluate ecosystem functioning under environmental change by relating traits predicting changes in species densities (response traits) to traits driving ecosystem functioning (effect traits). Stressors can, however, affect ecosystem functioning not only by altering species densities but also by directly changing species effect traits. We first identified the response traits predicting the cell density of 18 marine benthic diatom strains along gradients of two chemical stressors (a pesticide and a metal, atrazine and copper). We then tested if response traits could predict stressor-induced changes in ecosystem functioning, i.e. changes in the effect traits driving the diatoms’ potential contribution to primary production, sediment stabilization and energy content in intertidal systems. Finally, we examined if changes in density and changes in ecosystem functioning were correlated, to assess whether species capable of growing under stressful conditions could maintain their contribution to ecosystem functioning. The relationship between response traits and stressor-induced changes in density and ecosystem functioning was different depending on stressor type: a set of intercorrelated morphological traits predicted changes in both density and ecosystem functioning under metal stress, with large cells being more stress resistant. Changes in density and changes in ecosystem functioning were positively related: diatoms whose density was least affected by the metal were also able to sustain functioning under metal exposure. In contrast, the capacity for mixotrophic growth predicted changes in density, but not changes in ecosystem functioning under pesticide stress. Pesticide effects on density and on ecosystem functioning were negatively related for energy content and sediment stabilization, indicating a limited capacity of pesticide-tolerant diatoms to maintain their contribution to ecosystem functioning. Synthesis. Ecosystem functioning under stress can depend on whether the response traits driving changes in species densities also predict direct stress effects on the species’ contribution to functioning. Based on our results, we expect a disproportionate loss of functioning when traits driving species densities do not allow to maintain ecosystem functioning under stress.",
    keywords = "algae, aquatic plant ecology, diatom, ecosystem function, effect trait, herbicide, marine, metal, response trait, stress",
    author = "Christoph Mensens and {De Laender}, Frederik and Janssen, {Colin R.} and Koen Sabbe and {De Troch}, Marleen",
    year = "2017",
    month = "11",
    day = "1",
    doi = "10.1111/1365-2745.12777",
    language = "English",
    volume = "105",
    pages = "1598--1609",
    journal = "Journal of Ecology",
    issn = "0022-0477",
    publisher = "Wiley-Blackwell Publishing",
    number = "6",

    }

    Different response–effect trait relationships underlie contrasting responses to two chemical stressors. / Mensens, Christoph; De Laender, Frederik; Janssen, Colin R.; Sabbe, Koen; De Troch, Marleen.

    Dans: Journal of Ecology, Vol 105, Numéro 6, 01.11.2017, p. 1598-1609.

    Résultats de recherche: Contribution à un journal/une revueArticle

    TY - JOUR

    T1 - Different response–effect trait relationships underlie contrasting responses to two chemical stressors

    AU - Mensens,Christoph

    AU - De Laender,Frederik

    AU - Janssen,Colin R.

    AU - Sabbe,Koen

    AU - De Troch,Marleen

    PY - 2017/11/1

    Y1 - 2017/11/1

    N2 - Trait-based approaches evaluate ecosystem functioning under environmental change by relating traits predicting changes in species densities (response traits) to traits driving ecosystem functioning (effect traits). Stressors can, however, affect ecosystem functioning not only by altering species densities but also by directly changing species effect traits. We first identified the response traits predicting the cell density of 18 marine benthic diatom strains along gradients of two chemical stressors (a pesticide and a metal, atrazine and copper). We then tested if response traits could predict stressor-induced changes in ecosystem functioning, i.e. changes in the effect traits driving the diatoms’ potential contribution to primary production, sediment stabilization and energy content in intertidal systems. Finally, we examined if changes in density and changes in ecosystem functioning were correlated, to assess whether species capable of growing under stressful conditions could maintain their contribution to ecosystem functioning. The relationship between response traits and stressor-induced changes in density and ecosystem functioning was different depending on stressor type: a set of intercorrelated morphological traits predicted changes in both density and ecosystem functioning under metal stress, with large cells being more stress resistant. Changes in density and changes in ecosystem functioning were positively related: diatoms whose density was least affected by the metal were also able to sustain functioning under metal exposure. In contrast, the capacity for mixotrophic growth predicted changes in density, but not changes in ecosystem functioning under pesticide stress. Pesticide effects on density and on ecosystem functioning were negatively related for energy content and sediment stabilization, indicating a limited capacity of pesticide-tolerant diatoms to maintain their contribution to ecosystem functioning. Synthesis. Ecosystem functioning under stress can depend on whether the response traits driving changes in species densities also predict direct stress effects on the species’ contribution to functioning. Based on our results, we expect a disproportionate loss of functioning when traits driving species densities do not allow to maintain ecosystem functioning under stress.

    AB - Trait-based approaches evaluate ecosystem functioning under environmental change by relating traits predicting changes in species densities (response traits) to traits driving ecosystem functioning (effect traits). Stressors can, however, affect ecosystem functioning not only by altering species densities but also by directly changing species effect traits. We first identified the response traits predicting the cell density of 18 marine benthic diatom strains along gradients of two chemical stressors (a pesticide and a metal, atrazine and copper). We then tested if response traits could predict stressor-induced changes in ecosystem functioning, i.e. changes in the effect traits driving the diatoms’ potential contribution to primary production, sediment stabilization and energy content in intertidal systems. Finally, we examined if changes in density and changes in ecosystem functioning were correlated, to assess whether species capable of growing under stressful conditions could maintain their contribution to ecosystem functioning. The relationship between response traits and stressor-induced changes in density and ecosystem functioning was different depending on stressor type: a set of intercorrelated morphological traits predicted changes in both density and ecosystem functioning under metal stress, with large cells being more stress resistant. Changes in density and changes in ecosystem functioning were positively related: diatoms whose density was least affected by the metal were also able to sustain functioning under metal exposure. In contrast, the capacity for mixotrophic growth predicted changes in density, but not changes in ecosystem functioning under pesticide stress. Pesticide effects on density and on ecosystem functioning were negatively related for energy content and sediment stabilization, indicating a limited capacity of pesticide-tolerant diatoms to maintain their contribution to ecosystem functioning. Synthesis. Ecosystem functioning under stress can depend on whether the response traits driving changes in species densities also predict direct stress effects on the species’ contribution to functioning. Based on our results, we expect a disproportionate loss of functioning when traits driving species densities do not allow to maintain ecosystem functioning under stress.

    KW - algae

    KW - aquatic plant ecology

    KW - diatom

    KW - ecosystem function

    KW - effect trait

    KW - herbicide

    KW - marine

    KW - metal

    KW - response trait

    KW - stress

    UR - http://www.scopus.com/inward/record.url?scp=85018252334&partnerID=8YFLogxK

    U2 - 10.1111/1365-2745.12777

    DO - 10.1111/1365-2745.12777

    M3 - Article

    VL - 105

    SP - 1598

    EP - 1609

    JO - Journal of Ecology

    T2 - Journal of Ecology

    JF - Journal of Ecology

    SN - 0022-0477

    IS - 6

    ER -