The ecological effects of a herbicide-insecticide mixture on an experimental freshwater ecosystem.

  title={The ecological effects of a herbicide-insecticide mixture on an experimental freshwater ecosystem.},
  author={Catherine B. Choung and Ross V. Hyne and Mark M. Stevens and Grant C. Hose},
  journal={Environmental pollution},
Impact of Simulated Pesticide Spray Drift and Runoff Events on the Structural and Functional Zooplankton Diversity in Tropical Freshwater Microcosms
In conventional agriculture, several pesticides can be applied at the same stage of plant development, either individually or in mixtures and these compounds also reach aquatic ecosystems. The aim of
Eutrophic status influences the impact of pesticide mixtures and predation on Daphnia pulex populations
The study shows that the impact of pesticides on freshwater populations depends on the predation pressure, and demonstrates that the combined effect of pesticides and ecological stressors is influenced by the food availability and organism fitness related to the trophic status of freshwater ecosystems.
Effects of glyphosate formulations on the population dynamics of two freshwater cladoceran species
The combined methodology—recovery tests and the later analysis through MPM with a Monte Carlo simulation study—is proposed to integrate key demographic parameters and predict the possible fate of microcrustacean populations after being exposed to acute 4-Gly contamination events.
Atrazine Exposure Influences Immunity in the Blue Dasher Dragonfly, Pachydiplax longipennis (Odonata: Libellulidae)
Atrazine affects both hemocyte numbers and PO activity over time in P. longipennis, and the changed immune function demonstrated is likely to modify susceptibility to pathogens, alter wound healing, and may decrease available energy for growth and metamorphosis.
Use of nontarget organism Chironomus sancticaroli to study the toxic effects of nanoatrazine
The results indicate that Chironomus sancticaroli was sensitive to monitor nanoatrazine, presenting potential to be used in studies of toxicity of nanopesticides.
Toxicity of Chlorpyrifos and Dimethoate to the Ciliate Urostyla grandis, with Notes on Their Effects on Cell Ultrastructure
Chlorpyrifos and dimethoate are overused agricultural pesticides that can trigger trophic cascades, resulting in toxicity to both terrestrial and aquatic organisms as well as altered ecosystems. In
Effects of Pesticide Mixtures on Zooplankton Assemblages in Aquatic Microcosms Simulating Rice Paddy Fields
Results from principal response curves analysis showed that butachlor and triadimefon had no significant impact individually on the population level in zooplankton assemblages of microcosms, and the deleterious effects of pesticide mixtures were mainly caused by chlorpyrifos.


Effects of an herbicide and insecticide mixture in aquatic mesocosms
Atrazine altered species composition of macrophytes but did not alter plant biomass, total system metabolism, or the bioavailability of the insecticide to zooplankton or fish, and potential ecological synergisms did not occur.
Effects of the Herbicide Atrazine on Aquatic Insect Community Structure and Emergence
It is suggested that the effect of the herbicide on the insect community in the experimental ponds may be primarily indirect through reduction of the food of nonpredators (periphyton, macrophytes) and, to some extent, their habitat (macrophytes).
Environmental realistic concentrations of atrazine and endosulfan influence the structure of a pond community when the presence of common community members was manipulated but the initial composition of the community influenced these pesticide effects.
Threshold Levels for Effects of Insecticides in Freshwater Ecosystems: A Review
A literature review of freshwater (model) ecosystem studies with neurotoxic insecticides was performed to assess ecological threshold levels, to compare these levels with the first tier approach
The Responses of Plankton Communities in Experimental Ponds to Atrazine, the Most Heavily Used Pesticide in the United States
This study will demon- strate both the immediate inhibition of certain species and the secondary effects which such a response has on other species, and species with some tolerance to the effects of the chemical will be identified and their role in the changing conditions will be considered.
Acute, chronic and sublethal effects of synthetic pyrethroids on freshwater zooplankton
  • K. Day
  • Environmental Science
  • 1989
Levels of pyrethroids of 0.01 μg/L or less were found to have no detectable effects on zooplankton in the field, while higher levels of contamination caused reductions in copepods, rotifers and ostracods.
The effects of a pulsed application of chlorpyrifos on macroinvertebrate communities in an outdoor artificial stream system.
The results of an experiment examining the effects of pulsed application of a pesticide, chlorpyrifos, in an outdoor replicated artificial stream system indicated that the major effect of pesticide application was to interfere with the normal pattern of community change occurring within the system.