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

基本信息

批准号：
9814538
负责人：
James McClintock
金额：
$ 26.1万
依托单位：
University of Alabama at Birmingham
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 2003-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814538&HistoricalAwards=false
关键词：
Chemical Ecology Shallow Water Marine

项目摘要

9814538MCCLINTOCKThe 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.

9814538Mcclintock拟议的研究重点是有关化学防御进化以及有关生产防御性二级代谢物的成本和收益的基本假设的三个问题。第一个问题涉及化学防御的资源可用性模型。拟议的研究将检查在碳（光）限制下生长的大量藻类是否比在最佳光周环境中生长的大量产生的防御化合物水平更高，以及在富含营养的半岛地区南极大量藻类中的化学防御能力是否可能包括氮化合物。第二个问题涉及大藻类和无脊椎动物中的最佳防御理论。拟议的研究将确定化学防御在生殖组织或其他具有高能量含量（包括后代（幼虫））的组织中更丰富的程度。后一个目标的推论是确定嗜力嗜性幼虫是否比木质营养性幼虫更高的化学防御发生率。最后，使用罗斯海的先前工作作为起点，调查将确定化学防御的广泛空间变化，并开始解决可能促进变异的进化因素（如果存在）。该计划将大大提高我们对化学防御进化以及生物活性剂在南极海洋生态学中的性质和作用的理解。