Salinity, Temperature, and Food Effects on Production and Survival of Chrysaora Medusae

盐度、温度和食物对金藻水母生长和存活的影响

• 批准号: 9019404
• 负责人: Jennifer Purcell
• 金额: $ 7.79万
• 依托单位: University of Maryland Center for Environmental Sciences
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-01 至 1994-03-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019404&HistoricalAwards=false
• 关键词: Salinity; Temperature; Food; Effects; Production

Several types of gelatinous zooplankton, including medusae, sometimes occur in extremely high numbers (blooms). The reasons for dramatic population fluctuations are not understood. The scyphomedusa Chrysaora quinquecirrha is unusual in thriving in estuarine waters of as little as 7% salinity. However, its annual population fluctuations may be related to differences in springtime conditions during asexual production of medusae in the spring. This research is designed to test the combined effects of temperature, salinity, and food levels on the production and survival of young medusae. Drs. Purcell and Wright will examine ionic and osmotic regulation in the polyps and medusae in order to determine if they are physiologically limited in low salinities. This project is an effort to understand population fluctuations of a major predator in Chesapeake Bay. The results are important in understanding the formation of blooms in pelagic ecosystems. Responses of bloom organisms to changing environmental conditions are of particular importance now, given the predicted temperature and salinity changes associated with global warming.

几种凝胶状浮游动物，包括水母， 有时出现在极高的数字（开花）。 的 人口剧烈波动的原因并不是 明白 金水母Scyphomedusa Chrysaora quinquecomedha 在河口沃茨的繁荣是不寻常的， 盐度 然而，其每年的人口波动可能是 与无性繁殖期间春季条件的差异有关 水母在春天的生产。 本研究是 旨在测试温度，盐度， 和食物水平对幼仔的生产和生存的影响 水母 珀塞尔和赖特医生会检查离子和渗透压 调节的息肉和水母，以确定是否 它们在生理上受限于低盐度。 这个项目 是为了了解一个主要的 切萨皮克湾的捕食者 结果很重要， 了解浮游生态系统中水华的形成。 水华生物对环境变化的响应 现在的情况特别重要，因为 预测的温度和盐度变化与 全球变暖