Australian Institute of Marine Science, Townsville, QLD 4810, Australia.
Programa de Pós-Graduação em Oceanografia Biológica, Universidade Federal do Rio Grande, RS, Brazil.
Mar Pollut Bull. 2021 Aug;169:112582. doi: 10.1016/j.marpolbul.2021.112582. Epub 2021 Jun 10.
The Great Barrier Reef (GBR) is threatened by climate change and local pressures, including contaminants in nearshore habitats. This study investigated the combined effects of a GBR-relevant contaminant, the herbicide diuron, under current and two future climate scenarios on the coral Acropora millepora. All physiological responses tested (effective quantum yield (ΔF/Fm'), photosynthesis, calcification rate) were negatively affected with increasing concentrations of diuron. Interactive effects between diuron and climate were observed for all responses; however, climate had no significant effect on ΔF/Fm' or calcification rates. Photosynthesis was negatively affected as the climate scenarios were adjusted from ambient (28.1 °C, pCO = 397 ppm) to RCP8.5 2050 (29.1 °C, pCO = 680 ppm) and 2100 (30.2 °C, pCO = 858 ppm) with EC50 values declining from 19.4 to 10.6 and 2.6 μg L diuron in turn. These results highlight the likelihood that water quality guideline values may need to be adjusted as the climate changes.
大堡礁（GBR）受到气候变化和当地压力的威胁，包括近岸生境中的污染物。本研究调查了与大堡礁相关的污染物——除草剂敌草隆在当前和两种未来气候情景下对珊瑚 Acropora millepora 的综合影响。所有测试的生理反应（有效量子产量（ΔF/Fm'）、光合作用、钙化率）都随着敌草隆浓度的增加而受到负面影响。所有反应都观察到敌草隆和气候之间的相互作用效应；然而，气候对 ΔF/Fm'或钙化率没有显著影响。随着气候情景从环境（28.1°C，pCO = 397 ppm）调整为 RCP8.5 2050（29.1°C，pCO = 680 ppm）和 2100（30.2°C，pCO = 858 ppm），光合作用受到负面影响，EC50 值从 19.4 降至 10.6 和 2.6μg L 敌草隆。这些结果突出表明，随着气候变化，水质指导值可能需要进行调整。
