Temperature effect on the sensitivity of the copepod Eucyclops serrulatus （Crustacea, Copepoda, Cyclopoida） to agricultural pollutants in the hyporheic zone  

温度对灵敏度的影响真剑水蚤（桡足类甲壳动物，桡足类，剑水蚤）在潜流区农业污染物

作　　者：Tiziana DI LORENZO Walter D. DI MARZIO Marco CIFONI Barbara FIASCA M. BARATTI Maria E. SAENZ Diana M.P. GALASSI 

机构地区：[1]Institute of Ecosystem Study - CNR - National Research Council of Italy, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence, Italy [2]Programa de Investigacion en Ecotoxicologia, Departamento de Ciencias Basicas, Universidad Nacional de Lujan - Comision National de Investigaciones Cientificas y Tecnicas CONICET, Argentina [3]Department of Life, Health and Environmental Sciences, University of L'Aquila, Via Vetoio 1, Coppito 67100, L'Aquila, Italy

出　　处：《Current Zoology》2015年第4期629-640,共12页动物学报（英文版）

摘　　要：The sensitivity of freshwater invertebrates to agricultural pollutants is supposed to increase with rising temperature due to global warming. The aim of this study was to measure the effect of temperature on the lethal toxicity of ammonia-N, the herbicide Imazamox and the mixture of the two chemicals, in the adults and the juveniles of a population of the copepod Eucyc- lops serrulatus. This is a widely distributed species found in surface waters, in transitional habitats between surface water and groundwater, and in genuine groundwater environments. We tested the sensitivity by short-term bioassays （96 h） at 15℃ and 18℃, respectively. Our results highlighted the following： （1） increasing temperature affected the sensitivity of the adults to am- monia-N and of the juveniles to the mixture, all of which were more sensitive to its detrimental effects at 18~C; （2） the juvenile stages were more sensitive than the adults to all toxicants, and （3） for all combinations of chemicals and temperatures, the effects were synergistic and approximately one order of magnitude greater than those expected according to a concentration addition model when comparing the LC50 for each chemical in the mixture with the LC50s of chemicals individually assayed. Overall, in a context of global change, ammonia-N and mixtures of agricultural pollutants may affect the survival rate of species that spend a part or the whole life-cycle in the hyporheic habitat, with detrimental effects to biodiversity and ecosystem services provided by the hyporheic biota [Current Zoology 61 （4）： 629~540, 2015].

关 键 词：Hyporheie Global wanning COPEPODS AMMONIA HERBICIDE Mixtures 

分 类 号：X132[环境科学与工程—环境科学] TH811[机械工程—仪器科学与技术]