Further Studies of Disturbance Reproductive Effort, and Succession Across a Depth Gradient in a Southern California Kelp Forest

南加州海带森林中干扰繁殖努力和跨深度梯度的演替的进一步研究

• 批准号: 9101506
• 负责人: Paul Dayton
• 金额: $ 43万
• 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: 1991
• 资助国家: 美国
• 起止时间: 1991-10-15 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101506&HistoricalAwards=false
• 关键词: Further; Studies; Disturbance; Reproductive; Effort

This continuing research program includes six topics: 1) a 20-year perspective of several scales of disturbance on three species of kelp that will be continued with long term demographic studies in five areas; 2) thinning experiments searching for thresholds necessary for understory persistence in different regions; 3) evaluation of intra- and interspecific density effect on kelp growth, reproduction, recruitment, and survivorship; 4) an experimental evaluation of fundamental vs. realized niches of kelps in the presence of a strong competitive dominant, and 5) the effects of long shore and cross shore gradients, especially light and temperature with regard to succession theory. The investigators are also (6) using outplants to evaluate some adaptive tactics of four species of relatively rare kelps that have very different life histories. For most of the experiments they will use triplicated clearings at each of four depths and modules with different densities of sporophytes to evaluate regional and density thresholds on growth, time and intensity of reproduction, recruitment, and survivorship.

该持续研究计划包括六个主题：1） 20-三种扰动尺度的年远景 海藻物种，将继续与长期的人口 2）间伐试验， 林下持续性所需的阈值 3）种内和种间密度的评价 对海带生长、繁殖、补充和 生存率; 4）基本与 在一个强大的竞争力的存在下， 5）长海岸效应和跨海岸效应 梯度，特别是光和温度， 继承理论研究人员还（6）使用 外植体，以评估四种植物的一些适应策略， 相对罕见的海带有着非常不同的生活史。 对于大多数实验，他们将使用三重清除 在四个深度和具有不同密度的模块中的每一个， 孢子体，以评估区域和密度阈值 生长、繁殖的时间和强度、补充和 生存。