A Critical Reexamination of Food Web Patterns in Real Ecosystems

对真实生态系统中食物网模式的批判性重新审视

• 批准号: 8807404
• 负责人: George Sugihara
• 金额: $ 6万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-01 至 1990-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8807404&HistoricalAwards=false
• 关键词: Critical; Reexamination; Food; Web; Patterns

The central aim of this research is to provide a critical reappraisal of so-called empirical "laws" for trophic structure in ecosystems. The first whole-system data base designed specifically to represent the trophic structure of a large-scale ecosystem will be assembled. Efforts will be focused on Little Rock Lake, Wisconsin. This represents a long-term study site where much of the desired information has already been gathered and where a research team has agreed to collaborate to resolve the trophic structure of the system. The protocol for this study will involve an extended visit to the field station associated with the lake in order to coordinate the resolution of feeding relations within and between the major subsystems involved. The initial focus will be on the aquatic environment because it represents the largest fraction of the systems upon which the food web laws are based, and because the chance of constructing reasonable complete food webs is likely to be highest here. These data will represent at lease an order of magnitude improvement over what is currently available in the food web literature. Among the details that will be included in this study are: a full and more even-handed resolution of species involved and their feeding intensities; temporal variability in food web structure with season and ontogeny; the magnitudes of energy and material flows in aggregated webs; interaction strength; the effects on food web patterns of studying incomplete subsystems; and the variation in food web structure with the systematic incorporation of major to minor interactions. Among the specific questions that will be asked is how representative of real systems are the data upon which many food web generalizations are based? Here, credible data from the documented systems will be used to statistically test whether a large collection of questionable data are to be believed.

这项研究的主要目的是提供一个关键的 重新评价营养结构的所谓经验“法则” 在生态系统中。 设计了第一个全系统数据库 特别是代表一个大规模的营养结构 生态系统将被整合。 努力将集中在小 威斯康星州的罗克湖。 这是一个长期的研究中心 在那里已经收集了很多想要的信息 一个研究小组同意合作解决 系统的营养结构。 这方面的协议 这项研究将包括对实地考察站的长期访问 与湖泊相关联，以协调解决 主要子系统内部和之间的喂养关系 涉案 最初的重点将是水生环境 因为它代表了地球上 这是食物网法律的基础，因为 构建合理完整的食物网可能是 这里最高。 这些数据将至少代表 与目前在 食物网文学 其中的细节，将包括在 这项研究是：一个全面和更公平的决议， 涉及的物种及其摄食强度;时间 食物网结构随季节和个体发育的变化; 聚集网中的能量和物质流的大小; 相互作用强度;对食物网模式的影响 研究不完整的子系统;以及食物网的变化 大调与小调系统结合的结构 交互. 其中一个具体的问题是， 如何代表真实的系统的数据， 食物网的一般化是基于什么 在这里，可靠的数据， 记录的系统将用于统计测试是否 大量收集的可疑数据是可信的。