SGER: Documenting the Effect of the 1997 El Nino Southern Oscillation Event on a Broadly-Dispersing Barnacle Species at a Major Biogeographical Boundary

坎宁安9808267 本项目调查1997年强大的厄尔尼诺南方涛动事件对沿海海洋生物的影响。在E.N.S.O.通常沿着沿着美国西部把冷水带到南方的洋流改变了方向。 这种方向的改变不仅使水流方向逆转，而且使海面温度远远超过正常水平。 在E.N.S.O.多年来，许多海洋生物被发现远离其正常的地理范围以北。 在这个项目中，我们想知道E.N.S.O.事件对常见橡子藤壶腺藤壶的遗传种群结构有影响。 先前的研究表明，在蒙特雷湾南部采集的藤壶具有独特的基因特征。 我们会问，蒙特雷以北的南方人的比例是否会因为向北流动的水流而增加。 这个项目很重要因为E.N.S.O. 2000年的数据为了解全球变暖对海洋物种地理范围的影响提供了一个窗口。 这些研究可以帮助确定哪些物种将受益，哪些物种将受到全球变暖的伤害。 这项研究从独特的角度研究了变暖趋势对物种内遗传学的影响。 这是特别有用的，因为遗传学可以提供有关过去分布和传播模式的信息。

Cunningham 9808267 This project investigates the impact of the powerful 1997 El Nino Southern Oscillation Event on coastal marine organisms. During E.N.S.O. years, the ocean current that normally brings cold water south along the Western United States changes direction. This change in direction not only reverses the direction of flow, but raises sea surface temperatures far beyond normal. During E.N.S.O. years, many marine organisms are found far to the north of their normal geographic ranges. In this project, we are asking whether E.N.S.O. events have an effect on the genetic population structure of the common acorn barnacle Balanus glandula. Previous work has shown that barnacles collected to the south of Monterey Bay have a characteristic genetic signature. We will be asking if the proportion of southern individuals north of Monterey increases as a result of the northward flowing current. This project is important because the warmer conditions of E.N.S.O. years provide a window onto the consequences of global warming on the geographic ranges of marine species. These studies can help identify which species will benefit, and which ones will be hurt by global warming. This study takes the unique perspective of studying the effects of warming trends on the genetics within species. This is especially useful, because genetics can provide information about past distribution and dispersal patterns.