Abstract：
Adult corals are among the most sensitive marine organisms to dissolved manganese and experience tissue sloughing without bleaching (i.e., no loss of Symbiodinium spp.) but there are no chronic toxicity data for this sensitive endpoint. We exposed adult Acropora millepora to manganese in 2-d acute and 14-d chronic experiments using tissue sloughing as the toxicity endpoint. The acute tissue sloughing median effect concentration (EC50) was 2560 μg Mn/L. There was no chronic toxicity to A. millepora at concentrations up to and including the highest concentration of 1090 μg Mn/L i.e., the chronic no observed effect concentration (NOEC). A coral-specific acute-to-chronic ratio (ACR) (EC50/NOEC) of 2.3 was derived. These data were combined with chronic toxicity data for other marine organisms in a species sensitivity distribution (SSD). Marine manganese guidelines were 190, 300, 390 and 570 μg Mn/L to provide long-term protection of 99, 95, 90, and 80 % of marine species, respectively.
摘要：
成年珊瑚是对溶解的锰最敏感的海洋生物之一，并且在没有漂白的情况下经历组织脱落（即，没有损失的共生物种。)，但没有这个敏感终点的慢性毒性数据。我们使用组织脱落作为毒性终点，在2天急性和14天慢性实验中将成年Acroporamillepora暴露于锰。急性组织脱落的中位效应浓度（EC50）为2560μgMn/L。在浓度高达并包括最高浓度1090μgMn/L的情况下，对A无慢性毒性，即慢性无观察效应浓度(NOEC)。得出的珊瑚特异性急慢性比（ACR）（EC50/NOEC）为2.3。这些数据与物种敏感性分布（SSD）中其他海洋生物的慢性毒性数据相结合。海洋锰准则分别为190、300、390和570μgMn/L，以长期保护99、95、90和80％的海洋物种，分别。
