Menge Bruce A, Chan Francis, Lubchenco Jane
Department of Zoology, Oregon State University, Corvallis, OR 97331-2914, USA.
Ecol Lett. 2008 Feb;11(2):151-62. doi: 10.1111/j.1461-0248.2007.01135.x. Epub 2007 Nov 22.
To evaluate how climate change might impact a competitively dominant ecological engineer, we analysed the growth response of the mussel Mytilus californianus to climate patterns [El Niño-Southern Oscillation, Pacific Decadal Oscillation (PDO)]. Mussels grew faster during warmer climatic events. Growth was initially faster on a more productive cape compared to a less productive cape. Growth rates at the two capes merged in 2002, coincidentally with a several year-long shift from warm to cool PDO conditions. To determine the mechanism underlying this response, we examined growth responses to intertidal sea and air temperatures, phytoplankton, sea level and tide height. Together, water temperature (32%) and food (12.5%) explained 44.5% of the variance in mussel growth; contributions of other factors were not significant. In turn, water temperature and food respond to climate-driven variation in upwelling and other, unknown factors. Understanding responses of ecosystem engineers to climate change will require knowing direct thermal effects and indirect effects of factors altered by temperature change.
为了评估气候变化可能如何影响具有竞争优势的生态工程师，我们分析了贻贝加州贻贝对气候模式[厄尔尼诺-南方涛动、太平洋年代际振荡（PDO）]的生长反应。贻贝在气候变暖事件期间生长得更快。与生产力较低的海角相比，在生产力较高的海角，贻贝最初生长得更快。2002年，两个海角的生长速度趋于一致，巧合的是，当时出现了长达数年的从温暖的PDO状态向凉爽状态的转变。为了确定这种反应背后的机制，我们研究了贻贝对潮间带海水和空气温度、浮游植物、海平面和潮高的生长反应。水温（32%）和食物（12.5%）共同解释了贻贝生长变异的44.5%；其他因素的贡献不显著。反过来，水温和食物又对由气候驱动的上升流变化和其他未知因素做出反应。了解生态系统工程师对气候变化的反应将需要了解温度变化所改变的因素的直接热效应和间接效应。
