SGER: Genetic Diversity of Macrocystis pyrifera Population:Impact of El Nino

热带太平洋东部的观测表明，一个新的厄尔尼诺/南方涛动（ENSO）事件正在进行中。在南加州产生暴风雪冬季的ENSO事件可以通过物理干扰大量杀死成年海带种群，即使是相对温和的ENSO事件也可以产生极端的营养限制，从而降低巨藻（Macrocystis pyrifera）的丰度和生产力。ENSO对巨藻丰度和生产力的影响已有文献记载，但其对巨藻遗传多样性和种群动态的影响尚不清楚。该项目将对1992年ENSO事件对南加州海域巨藻种群遗传多样性的影响进行最及时的调查。该方法将利用DNA指纹和限制性片段长度多态性技术来解决巨藻种群在ENSO事件之前和ENSO事件后恢复期间的遗传结构和组成。为了评估ENSO后的关键恢复期，这项研究（具有极端紧迫性）必须在1992年ENSO事件发生之前开始，该事件预计将在今年夏天发生。

Observations in the eastern tropical Pacific indicate that a new El Nino/Southern Oscillation (ENSO) event is now underway. ENSO events that produce stormy winters in Southern California can decimate adult kelp populations through physical disturbance, and even relatively mild ENSO events can produce extreme nutrient limitation that reduce the abundance and productivity of giant kelp, Macrocystis pyrifera. The effects of ENSO on abundances and productivity of the giant kelp are well documented, but its effect on genetic diversity and population dynamics of giant kelp remains unknown. This project will initiate a most timely investigation of the impact of the 1992 ENSO event on genetic diversity of giant kelp populations in the Southern California Bight. The approach will exploit DNA fingerprinting and restriction fragment length polymorphism technologies to address the genetic structure and composition of giant kelp populations prior to the ENSO event and during the post-ENSO recovery. To evaluate the critical post-ENSO recovery period, this research (having extreme urgency) must be initiated now before the onset of the 1992 ENSO event that's predicted for this summer.