Variable Effects of Nutrients, Productivity, Consumption and the Food Pulse on Floodplain River Ecosystems

养分、生产力、消费和食物脉动对洪泛区河流生态系统的可变影响

• 批准号: 0089834
• 负责人: Kirk Winemiller
• 金额: $ 30万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0089834&HistoricalAwards=false
• 关键词: Variable; Effects; Nutrients; Productivity; Consumption

ABSTRACTP.I. Kirk O. WinemillerInstitution: Texas A & M UniversityProposal Number: DEB-0089834This research addresses the importance and strength of mechanisms involved in feedbacks and interactions among major components of lower food webs in floodplain river ecosystems. The work will explore how temporal heterogeneity due to seasonal flood pulses influences these food webs. Floods lead to a nutrient pulse into aquatic ecosystems that varies over time and over space. These floods may cause time lags in the reciprocity of consumer resource interactions, so that donor-control does not dominate the system continuously. A series of fish exclosure/enclosure experiments will be used to explore fish effects on alge and particulate organic matter over the annual hydrocycle. Experiments will be conducted during three phases of the hydrocycle. The research will be completed in South American tropical riverine floodplains. The work will be significant in enhancing scientific understanding of the relative effects of donor vs. consumer control in relation to ecosystem dynamics and it will help elucidate how ecosystems link species to landscapes.

摘要一 柯克岛Winemiller机构： Texas A& M UniversityProposal Number：DEB-0089834本研究探讨了河漫滩河流生态系统中下游食物网主要组成部分之间的反馈和相互作用机制的重要性和强度。 这项工作将探讨如何时间异质性，由于季节性洪水脉冲影响这些食物网。 洪水导致营养脉冲进入水生生态系统，随着时间和空间的变化而变化。 这些洪水可能会导致消费者资源相互作用的相互作用的时间滞后，使捐助者控制不连续主导系统。 一系列的鱼类围封/围封实验将被用来探讨鱼类对藻类和颗粒有机物在每年的水循环的影响。 实验将在水力循环的三个阶段进行。 这项研究将在南美洲热带河流泛滥平原完成。 这项工作将对加强对捐助者控制与消费者控制在生态系统动态方面的相对影响的科学理解具有重要意义，并将有助于阐明生态系统如何将物种与景观联系起来。