The Chemical Ecology of Shallow-Water Marine Macroalgae and Invertebrates on the Antarctic Peninsula

南极半岛浅水海洋大型藻类和无脊椎动物的化学生态学

• 批准号: 9901076
• 负责人: Bill Baker
• 金额: $ 23.61万
• 依托单位: Florida Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9901076&HistoricalAwards=false
• 关键词: Chemical; Ecology; Shallow; Water; Marine

9901076BAKERThe proposed research focuses on three questions concerning the evolution of chemical defenses and the underlying assumptions concerning the costs and benefits of producing defensive secondary metabolites. The first question concerns the Resource Availability Model of chemical defense. The proposed research will examine whether macroalgae grown under carbon (light) limitation produce quantitatively higher levels of defensive compounds than those grown in an optimal light environment, and whether chemical defenses in antarctic macroalgae of the nutrient-rich peninsula region are likely to include nitrogen compounds. The second question addresses the Optimal Defense Theory in macroalgae and invertebrates. The proposed research will determine the extent to which chemical defenses are more abundant in reproductive tissue or in other tissues with a high energy content, including offspring (larvae). A corollary to this latter objective is a determination of whether lecithotrophic larvae have a higher incidence of chemical defense than planktotrophic larvae. Finally, using previous work in the Ross Sea as a starting point, the investigation will determine the broad scale spatial variation in chemical defenses and begin to address the evolutionary factors which might promote variation, if it exists. The program will significantly advance our understanding of the evolution of chemical defenses as well as the nature and role of bioactive agents in the ecology of antarctic marine benthos.

[9901076baker]提出的研究重点是关于化学防御进化的三个问题，以及关于产生防御性次生代谢物的成本和收益的潜在假设。第一个问题是关于化学防御的资源可用性模型。本研究将探讨在碳（光）限制条件下生长的大藻是否比在最佳光环境下生长的大藻产生更多的防御性化合物，以及营养丰富的半岛地区的南极大藻的化学防御是否可能包括氮化合物。第二个问题是关于大型藻类和无脊椎动物的最佳防御理论。拟议的研究将确定哪些化学防御在生殖组织或其他能量含量高的组织（包括后代（幼虫））中更丰富。后一目标的一个必然结果是确定电营养幼虫是否比浮游营养幼虫具有更高的化学防御发生率。最后，以之前在罗斯海的研究为出发点，调查将确定化学防御的大尺度空间变化，并开始解决可能促进变化的进化因素，如果它存在的话。该计划将大大促进我们对化学防御的演变以及生物活性剂在南极海洋底栖生物生态中的性质和作用的理解。