24 research outputs found
Temperature-dependent toxicities of chlorothalonil and copper pyrithione to the marine copepod Tigriopus japonicus
Synchronization properties of coupled electrochemical bursters; Rhythmic electrodissolution/passivation of iron electrode assemblies in acidic electrolyte containing chloride ions
Combined toxicities of antifouling compounds: Implications on setting water quality criteria for protecting marine ecosystems
Temperature-dependent toxicities of chlorothalonil and copper pyrithione to the marine copepod Tigriopus japonicus and dinoflagellate Pyrocystis lunula
The anticipated anthropogenically-driven climate change may ultimately result in increased incidents of temperature extremes that will have profound implications on the toxicity of chemical contaminants and hence their ecological risks to marine organisms in the tropics and subtropics. We hypothesised that chemical toxicity generally increases with increasing temperature over the thermal tolerance range (TTR) of a species, and is further exacerbated at extreme temperatures (i.e. lower or higher than the TTR). To test this hypothesis, we investigated the acute toxicity of two commonly used antifouling biocides, chlorothalonil and copper pyrithione (CuPT), to the marine copepod Tigriopus japonicus and dinoflagellate Pyrocystis lunula over a wide range of water temperatures. Our results verified that toxicities of the two biocides, in terms of 96-h LC50 (for T. japonicus) and 24-h EC50 (for P. lunula), were highly temperature-dependent, although the profile of temperature-dependency varied between the two chemicals. The LC50 values of T. japonicus exposed to CuPT decreased with increasing temperature between 15–31°C (i.e. assumed TTR), whereas the LC50 values at 4 and 35°C were significantly lower than those at 10 and 25°C, respectively. The toxicity of chlorothalonil to the copepod followed the same pattern of CuPT between 25 and 35°C but the LC50 values between 4 and 25°C were somehow indifferent. In P. lunula, a similar temperature-dependent toxicity was also observed for CuPT but not for chlorothalonil. Such dissimilar temperature-dependent toxicity profiles between the two biocides may be partially attributable to the differences in temperature-mediated modifications of their physicochemical properties, bioavailability, toxicokinetics, and thus resultant toxicity to the test organism.published_or_final_versio
Electrochemical resonance: Frequency response analysis of the electrodissolution of copper in trifluoroacetic acid close to dynamic instabilities
Bistability, oscillations and bifurcations of the electrocatalytic oxidation of HCHO on Pt
Temperature-dependent toxicities of chlorothalonil and copper pyrithione to the marine copepod Tigriopus japonicus
Parallel sessions in Amphitheaters B and C: Platform Session 6C (Amphi C) - Ecological Relevance and Multi Stress: abstract no. 118The 15th International Symposium on Pollutant Responses in Marine Organisms (PRIMO 15), Bordeaux, France, 17-20 May 2009