Plant-Herbivore Interactions in the Pelagic Zone of Eutrophic Lakes

富营养化湖泊远洋区植物与草食动物的相互作用

• 批准号: 9308375
• 负责人: Orlando Sarnelle
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9308375&HistoricalAwards=false
• 关键词: Plant; Herbivore; Interactions; Pelagic; Zone

WPC0 2 B V T W #| x 10 pitch z N x x x , x @ ; HP Laserjet (25-in-one, Network) HPLASEII.PRS X t 4 P RN h 0 IS 2 4 V F W Courier 10 pitch z N x x x , x @ ; HP Laserjet (25-in-one, Network) HPLASEII.PRS X t 4 P RN h 0 IS 2 & J . #| x 93083375 Sarnelle This research focuses on the strong interactions between Daphnia and algae in eutrophic lakes. The general objectives to quantify the relationship between the death rate of Daphnia and total algal biomass to examine the role of initial conditions as a determinant of planktonic community structure and to quantify adaptive tradeoffs faced by algal species to constraints imposed by herbivory. This research examines whether multiple equilibria exist in the community structure of eutrophic lakes, due to a reciprocal negative interaction between Daphnia and filamentous bluegreens. In addition the work will identify some of the mechanisms underlying the above interactions, by examing adaptive tradeoffs faced by algal species. %%% The presence of multiple equilibria has been predicated by ecological theory but rarely demostrated experimentally. This is crucial to development of ecology as a predictive science since the need to specify initial conditions may severely contrain the ability to predict ecolgical phenomena. The role of food webs in ameliorating negative effects of extroplication on water quality is also important to indentifying management targets for reducing excessive algal growth in nutrient enriched lakes via changes in the fish community.

WPC0 2 B V T W#|x 10 Pitch z N x，x@；HP LaserJet(25合1，网络)HPLASEii。PrS X t 4 P RN h 0 is 2 4 V F W Courier 10 Pitch z N x，x@；HP Laserjet(25合1，网络)HPLASEprs X t 4 P RN h 0 is 2&amp；J。#|x 93083375 Sarnelle本研究聚焦于富营养化湖泊中水蚤与藻类之间的强相互作用。总的目标是量化水蚤死亡率和藻类总生物量之间的关系，检查初始条件作为浮游群落结构决定因素的作用，并量化藻类物种面临的对食草性限制的适应性权衡。这项研究考察了富营养化湖泊的群落结构中是否存在多重平衡，这是由于水蚤和丝状蓝绿色之间的相互负相互作用造成的。此外，这项工作将通过研究藻类物种面临的适应性权衡来确定上述相互作用的一些机制。多个平衡点的存在已被生态学理论所预言，但很少有实验证明。这对生态学作为一门预测科学的发展至关重要，因为需要明确初始条件可能会严重削弱预测生态现象的能力。食物网在改善外捕对水质的负面影响方面的作用，对于确定通过改变鱼类群落减少营养丰富湖泊中藻类过度生长的管理目标也很重要。