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

东热带太平洋的观测表明，一场新的厄尔尼诺/南方涛动(ENSO)事件正在发生。在南加州产生暴风雨冬天的ENSO事件可能会通过物理干扰导致成年海带种群大量死亡，即使是相对温和的ENSO事件也会产生极端的营养限制，从而降低巨型海藻Macrocystis pyrifera的丰度和生产力。ENSO对巨型海带丰度和生产力的影响已经有了很好的文献记载，但对巨型海带遗传多样性和种群动态的影响尚不清楚。该项目将启动对1992年ENSO事件对南加州海湾巨型海藻种群遗传多样性的影响的最及时的调查。该方法将利用DNA指纹和限制性片段长度多态性技术，在ENSO事件之前和ENSO后恢复期间处理巨型海藻种群的遗传结构和组成。为了评估ENSO后的关键恢复期，这项研究(具有极端紧迫性)必须在预计于今年夏天发生的1992年ENSO事件开始之前启动。

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.