Effects of current and future coastal upwelling conditions on the fertilization success of the red abalone (Haliotis rufescens)
Effects of current and future coastal upwelling conditions on the fertilization success of the red abalone (Haliotis rufescens)
复制标题
DOI：
10.1093/icesjms/fsx017
复制
发表时间：
2017-05-01
影响因子：
3.3
通讯作者：
Barry, James P.
中科院分区：
文献类型：
--
作者：
Boch, Charles A.;Litvin, Steven Y.;Barry, James P.
酸化、脱氧和变暖正在加剧全世界沿海水域的变化，可能给海洋生物和海洋经济带来严重后果。为了研究这些海洋变化对关键生物过程的影响，我们测量了加州海流大型海洋生态系统当前和预期的未来条件对红鲍（Haliotis rufescens）受精成功的影响。实验室实验用于评估鲍鱼同时暴露于不同水平的海水 pH 值（梯度从 7.95 至 7.2）、溶解氧（DO）（类似于 60 和 180 μm.kg SW）和温度（9、13 和 18 摄氏度）时的受精成功率。随着 pH 值的降低，受精成功率不断下降，但在凉爽（9 摄氏度上升流）到平均（13 摄氏度）海水温度下，受精成功率急剧下降到接近 pH 7.55 的阈值以下。 DO 的变化对受精的影响可以忽略不计。相比之下，加利福尼亚州中部通常与厄尔尼诺南方涛动条件相关的较温暖的水域（18摄氏度）与pH值下降产生相反的作用，很大程度上减少了pH值阈值以下的强烈负面影响。检查多种环境驱动因素的相互作用影响并努力描述生物体沿环境变化梯度的功能反应的实验方法对于增进我们对海洋条件变化的现实世界后果的理解变得越来越重要。
Acidification, deoxygenation, and warming are escalating changes in coastal waters throughout the world ocean, with potentially severe consequences for marine life and ocean-based economies. To examine the influence of these oceanographic changes on a key biological process, we measured the effects of current and expected future conditions in the California Current Large Marine Ecosystem on the fertilization success of the red abalone (Haliotis rufescens). Laboratory experiments were used to assess abalone fertilization success during simultaneous exposure to various levels of seawater pH (gradient from 7.95 to 7.2), dissolved oxygen (DO) (similar to 60 and 180 mu m.kg SW) and temperature (9, 13, and 18 degrees C). Fertilization success declined continuously with decreasing pH but dropped precipitously below a threshold near pH 7.55 in cool (9 degrees C-upwelling) to average (13 degrees C) seawater temperatures. Variation in DO had a negligible effect on fertilization. In contrast, warmer waters (18 degrees C) often associated with El Nino Southern Oscillation conditions in central California acted antagonistically with decreasing pH, largely reducing the strong negative influence below the pH threshold. Experimental approaches that examine the interactive effects of multiple environmental drivers and also strive to characterize the functional response of organisms along gradients in environmental change are becoming increasingly important in advancing our understanding of the real-world consequences of changing ocean conditions.