ADVANCED INTERACTION SEARCH

VitiSynth Full Entry

Reference: Cascading effects caused by fenoxycarb in freshwater systems dominated by Daphnia carinata and Dolerocypris sinensis
Key Statements

Abstract-

To evaluate the aquatic hazards of the insect juvenile hormone analogue fenoxycarb, a single application (0, 48.8, 156.3, 500, 1600, and 5120 μg/L) of it was done in indoor freshwater systems dominated by Daphnia carinata (daphnid) and Dolerocypris sinensis (ostracoda). The responses of zooplankton (counted by abundance and the activity and immuno-reactive content of free N-Acetyl-β-D-glucosaminidase (NAGase)), phytoplankton (counted by chlorophyll and phycocyanin), planktonic bacteria and fungi, and some water quality parameters were investigated in a period of 35 d. Results of the study showed that the ostracoda was more sensitive than daphnid, with time-weighted average (TWA)-based no observed effect concentrations (NOECs) to be 8.45 and 12.66 μg/L in systems without humic acid addition (HA−) and to be 6.37 and 9.54 μg/L in systems with humic acid addition (HA+). The duration of treatment-related effects in the ostracoda population was longer than the daphnid population (21 vs. 14 days). Besides, the data analysis indicated that the toxicity of fenoxycarb was significantly enhanced in the HA+ systems. Owing to the reduced grazing pressure, the concentrations of chlorophyll and phycocyanin increased in the two highest treatments. The increase in photosynthesis along with a reduced animal excretion led to an increase in pH and a decrease in nutrient contents. These changes seemed to have an effect on the microbial communities. For example, the abundances of some opportunistic pathogens of aquatic animals (e.g. Aeromonas and Cladosporium) and organic-pollutant-degrading microorganisms (e.g. Ancylobacter and Azospirillum) increased significantly in microbial communities, but the abundances of Pedobacter, Candidatus Planktoluna, and Rhodobacter (photosynthetic bacteria) markedly decreased. This study provides useful information to understand the ecotoxicological impacts of fenoxycarb at the population and community levels while integrating the effects of HA on toxicity.

(highlighting by VitiSynth)

Link to paper-

https://www.sciencedirect.com/science/article/pii/S0147651320308617

https://doi.org/10.1016/j.ecoenv.2020.111022


Partially indexed reference.

View Interactions

VitiSynth Review
Go Back

Vitisynth

Publication Details

Published: 2020
Publication: Ecotoxicology and Environmental Safety
Issue: 2020 203-111022
Author: Lu Y 2020
Recommendation:

NOT SET

Related Video

None for this Entry

Related Audio

None for this Entry

Discuss this Entry

No related discussions available.

Join Discussion

Latest Discussions
Special Report

Date: 19th April 2020
Vine Synth:Growth stage:VS 4 Flowering:VS 4c Bud development:VS 4c.2 Differentiation of main axis of anlage into inflorescence rachis primordium or tendril primordium

The development of inflorescence primordia (IP) is clearly described i...Read more

Date: 16th February 2020
Admin Synth:Guides:Data standards:Colour codes

I think it would be very useful if we have standard colour codes for e...Read more

Date: 29th October 2015
Reference:Journal:Weed Technology:2015:Online October 2015:Devkota P 2015:Influence of Spray Solution Temperature and Holding Duration on Weed Control with Premixed Glyphosate and Dicamba Formulation

Pesticides in general are chemical products, therefore the quality of ...Read more

List of sponsors.. Read more

test