Patterns of Disturbance, Reproductive Effort, and SuccessionAcross a Depth Gradient in a Southern California Kelp ForestCommunity

南加州海带森林群落中深度梯度的干扰、繁殖努力和演替模式

• 批准号: 8700989
• 负责人: Paul Dayton
• 金额: $ 40.65万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-04-01 至 1990-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700989&HistoricalAwards=false
• 关键词: Patterns; Disturbance; Reproductive; Effort; SuccessionAcross

Dayton and Tegner are leaders in the study of kelp system ecology; Dayton is likewise recognized for substantial contributions to ecological theory on the development and organization of natural communities. These investigators have been studying the dynamics of kelp populations in the extensive Pt. Loma kelp beds for a decade and a half. The last award and their long-term monitoring allowed some very interesting observations on the effect of El Nino - Southern Oscillation anomalies on the kelp forest dynamics. Second order effects, after the return to "normal" oceanographic/atmospheric conditions, have caused dramatic perturbation of the Pt. Loma beds. Ecological succession within the kelp community has proceeded in ways that were not predictable, a priori, from our earlier understanding of kelp systems. Dayton and Tegner feel that our predictive capabilities are now hampered by our lack of understanding of how physical disturbances and physiological conditions of kelps (as affected by environmental stresses and variation) influence reproductive condition, capacity and the recrutiment of new individuals. This work will examine inter- and intra-specific competition, and nutrient availability effects on reproduction and succession within kelp forests.

代顿和泰格纳是海带系统生态学研究的领导者；代顿同样因其对自然群落发展和组织的生态理论的重大贡献而受到认可。这些研究人员一直在研究广阔的铂族海带种群的动态。洛马海带床已有十五年历史了。 上一个奖项和他们的长期监测使我们能够对厄尔尼诺-南方涛动异常对海带森林动态的影响进行一些非常有趣的观察。 在恢复“正常”海洋/大气条件后，二阶效应已引起 Pt 的剧烈扰动。洛马床。 海带群落内的生态演替以我们早期对海带系统的理解无法预测的方式进行。 代顿和泰格纳认为，我们的预测能力现在受到了阻碍，因为我们缺乏对海带的物理干扰和生理条件（受环境压力和变化的影响）如何影响繁殖条件、能力和新个体招募的了解。 这项工作将研究种间和种内竞争以及养分可用性对海带森林内繁殖和演替的影响。