Effect of interspecific competition on species sensitivity distribution models: Analysis of plant responses to chemical stress - Université Claude Bernard Lyon 1 Access content directly
Journal Articles Ecotoxicology and Environmental Safety Year : 2020

Effect of interspecific competition on species sensitivity distribution models: Analysis of plant responses to chemical stress

Abstract

Species Sensitivity Distributions (SSD) are widely used in environmental risk assessment to predict the con- centration of a contaminant that is hazardous for 5% of species (HC5). They are based on monospecific bioassays conducted in the laboratory and thus do not directly take into account ecological interactions. This point, among others, is accounted for in environmental risk assessment through an assessment factor (AF) that is applied to compensate for the lack of environmental representativity. In this study, we aimed to assess the effects of in- terspecific competition on the responses towards isoproturon of plant species representative of a vegetated filter strip community, and to assess its impact on the derived SSD and HC5 values. To do so, we realized bioassays confronting six herbaceous species to a gradient of isoproturon exposure in presence and absence of a compe- titor. Several modelling approaches were applied to see how they affected the results, using different critical effect concentrations and investigating different ways to handle multiple endpoints in SSD. At the species level, there was a strong trend toward organisms being more sensitive to isoproturon in presence of a competitor than in its absence. At the community level, this trend was also observed in the SSDs and HC5 values were always lower in presence of a competitor (1.12–11.13 times lower, depending on the modelling approach). Our dis- cussion questions the relevance of SSD and AF as currently applied in environmental risk assessment.
Fichier principal
Vignette du fichier
Manuscript_clean_version.pdf (729.74 Ko) Télécharger le fichier
SI_publie.pdf (711.53 Ko) Télécharger le fichier
SI_complet.pdf (2.49 Mo) Télécharger le fichier
Origin Files produced by the author(s)
Comment Publication
Comment SI publié
Comment SI non publié contenant des figures et tableaux supplémentaires
Loading...

Dates and versions

hal-02619516 , version 1 (31-05-2020)

Identifiers

Cite

Vincent Baillard, Cécile Sulmon, Anne‐kristel Bittebière, Cendrine Mony, Ivan Couée, et al.. Effect of interspecific competition on species sensitivity distribution models: Analysis of plant responses to chemical stress. Ecotoxicology and Environmental Safety, 2020, 200, pp.110722. ⟨10.1016/j.ecoenv.2020.110722⟩. ⟨hal-02619516⟩
185 View
341 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More