Multiple Stressors in "COLLEMBOLAND”: Assessing the Effects of Multiple Stressors on Collembola at the Individual and Extrapolate to the Population-level

TY - BOOK

T1 - Multiple Stressors in "COLLEMBOLAND”

T2 - Assessing the Effects of Multiple Stressors on Collembola at the Individual and Extrapolate to the Population-level

AU - Xie, Liyan

PY - 2023/10

Y1 - 2023/10

N2 - Integrating multiple stressors into ecotoxicological research and leveraging insights from individual-based risk assessments to a population level are effective approaches to enhance the ecological realism of environmental risk assessment (ERA) for chemicals. This PhD study focused on evaluating the effects of various stressors on both individual and population levels using the soil arthropods Collembola. The primary emphasis was placed on understanding how temperature, drought and their interaction with a widely used agricultural pesticide, teflubenzuron, affected these organisms. To accomplish this, a structured population model, specifically a two-stage model, was employed to extrapolate the effects of these stressors from an individual to population level.This PhD study provided detailed knowledge of the effects of high temperature, drought conditions, teflubenzuron exposure, as well as the combined effects on the life history traits of Collembola. The findings show that the population growth rate of Collembola declines when exposed to drought, teflubenzuron, or a combination of these two stressors. Moreover, the research has uncovered a synergistic interaction between the effects of teflubenzuron and drought concerning the reproduction and growth of Collembola. Additionally, this study highlights the benefits of including multiple life history traits and increasing the number of evaluation time points in toxicity tests.In summary, this study significantly contributes to the field of ERAs by incorporating natural stressors, particularly mechanistic population-level effects, shedding light on pesticide interactions and contributing to a more comprehensive ERA.

AB - Integrating multiple stressors into ecotoxicological research and leveraging insights from individual-based risk assessments to a population level are effective approaches to enhance the ecological realism of environmental risk assessment (ERA) for chemicals. This PhD study focused on evaluating the effects of various stressors on both individual and population levels using the soil arthropods Collembola. The primary emphasis was placed on understanding how temperature, drought and their interaction with a widely used agricultural pesticide, teflubenzuron, affected these organisms. To accomplish this, a structured population model, specifically a two-stage model, was employed to extrapolate the effects of these stressors from an individual to population level.This PhD study provided detailed knowledge of the effects of high temperature, drought conditions, teflubenzuron exposure, as well as the combined effects on the life history traits of Collembola. The findings show that the population growth rate of Collembola declines when exposed to drought, teflubenzuron, or a combination of these two stressors. Moreover, the research has uncovered a synergistic interaction between the effects of teflubenzuron and drought concerning the reproduction and growth of Collembola. Additionally, this study highlights the benefits of including multiple life history traits and increasing the number of evaluation time points in toxicity tests.In summary, this study significantly contributes to the field of ERAs by incorporating natural stressors, particularly mechanistic population-level effects, shedding light on pesticide interactions and contributing to a more comprehensive ERA.

KW - Climatic stress

KW - Population model

KW - Springtails

KW - Multiple stressors

KW - Ecotoxicology

M3 - Ph.D. thesis

BT - Multiple Stressors in "COLLEMBOLAND”

PB - Århus Universitet

ER -