Inducible pesticide tolerance in Daphnia pulex influenced by resource availability.

Autor: Wuerthner VP; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Jaeger J; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Garramone PS; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Loomis CO; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Pecheny Y; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Reynolds R; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Deluna L; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Klein S; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Lam M; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Hua J; Biological Sciences Department Binghamton University (SUNY) Binghamton New York., Meindl GA; Biological Sciences Department Binghamton University (SUNY) Binghamton New York.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2019 Jan 10; Vol. 9 (3), pp. 1182-1190. Date of Electronic Publication: 2019 Jan 10 (Print Publication: 2019).
DOI: 10.1002/ece3.4807
Abstrakt: Pesticides are a ubiquitous contaminant in aquatic ecosystems. Despite the relative sensitivity of aquatic species to pesticides, growing evidence suggests that populations can respond to pesticides by evolving higher baseline tolerance or inducing a higher tolerance via phenotypic plasticity. While both mechanisms can allow organisms to persist when faced with pesticides, resource allocation theory suggests that tolerance may be related to resource acquisition by the organism. Using Daphnia pulex , we investigated how algal resource availability influenced the baseline and inducible tolerance of D. pulex to a carbamate insecticide, carbaryl. Individuals reared in high resource environments had a higher baseline carbaryl tolerance compared to those reared in low resource environments. However, D. pulex from low resource treatments exposed to sublethal concentrations of carbaryl early in development induced increased tolerance to a lethal concentration of carbaryl later in life. Only individuals reared in the low resource environment induced carbaryl tolerance. Collectively, this highlights the importance of considering resource availability in our understanding of pesticide tolerance.
Databáze: MEDLINE