Community rescue in experimental phytoplankton communities facing severe herbicide pollution.

BioRxiv : the Preprint Server for Biology
Vincent FugèreAndrew Gonzalez

Abstract

Evolutionary rescue occurs when adaptation prevents local extinction in deteriorating environments. Laboratory experiments with microorganisms have shown that the likelihood of evolutionary rescue is greatest in large populations that have previously experienced sublethal doses of stress. To assess this result in natural communities, we conducted a mesocosm experiment with semi-natural phytoplankton communities exposed to glyphosate, a widely used herbicide. We tested whether community biomass and pre-exposure to sublethal stress would facilitate community rescue after severe contamination. Exposure to sublethal stress, but not community biomass, facilitated rescue significantly; even though it led to biodiversity loss. Furthermore, glyphosate had modest effects on community composition, suggesting that community resistance to glyphosate was primarily driven by changes in resistance within taxa, not by community turnover. Our results expand the scope of community evolutionary rescue theory to complex ecosystems and confirm that prior stress exposure is a key predictor of rescue.

Related Concepts

Environment
General Adaptation Syndrome
Herbicides
Phytoplankton
glyphosate
Local
Adaptation
Research Study
Resistance Process

Related Feeds

BioRxiv & MedRxiv Preprints

BioRxiv and MedRxiv are the preprint servers for biology and health sciences respectively, operated by Cold Spring Harbor Laboratory. Here are the latest preprint articles (which are not peer-reviewed) from BioRxiv and MedRxiv.

Related Papers

Bulletin of Environmental Contamination and Toxicology
K Cauble, R S Wagner
Proceedings of the National Academy of Sciences of the United States of America
Etienne Low-DécarieGraham Bell
Environmental Science and Pollution Research International
Geoffrey R SmithJessica E Rettig
Proceedings of the National Academy of Sciences of the United States of America
Philipp BrunMark R Payne
© 2021 Meta ULC. All rights reserved