Spatial- Temporal Dynamics of Plant-Herbivore Interactions and Ecosystem Processes in Coastal Tundra of the Yukon-Kuskokwim Delta in Western Alaska

阿拉斯加西部育空-库斯科奎姆三角洲沿海苔原植物-草食动物相互作用和生态系统过程的时空动态

• 批准号: 9815383
• 负责人: James Sedinger
• 金额: $ 5.14万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9815383&HistoricalAwards=false
• 关键词: Spatial; Temporal; Dynamics; Plant; Herbivore

Abstract98-15383SedingerSpatial-temporal dynamics of plant-herbivore interactions and ecosystem processes in coastal tundra of the Yukon-Kuskokwim Delta in Western AlaskaThis research will focus on how the spatial-temporal structure of feedbacks between vegetation and herbivore populations organizes ecosystem processes at local and regional scales. Understanding these feedbacks requires the coupling of both short-term and long-term impacts of herbivores on vegetation structure and nutrient cycling processes with the associated movement patterns and demographic parameters of herbivores. This project will build on a 14-year study of the demography of Black Brant geese, and on 7 years of research on vegetation/ecosystem response to herbivory. The investigators will mark 2,500 brant and record reproductive success for an additional 900 previously-marked adults to enable estimation of age- and time-specific breeding probability and survival, and fidelity to specific brood-rearing areas. The investigators will also continue a long-term investigation of spatial variation in growth. The project is leveraged by work planned by the USGS on the Mexico wintering grounds of the brant, allowing the PIs to study the impact of wintering location on reproductive performance and survival. In addition, the data collected in this year will enable the PIs to test hypotheses related to El Nino effects from the 1997-98 ENSO event.

摘要98-15383植物 - 动物相互作用和生态系统过程的sedingerspatial-nor-周期动力学秤。了解这些反馈需要将草食动物的短期和长期影响耦合到植被结构以及养分循环过程中，并与食草动物的相关运动模式和人口统计参数结合。该项目将基于对黑葡萄鹅人口统计学的14年研究，以及关于植被/生态系统对食草动物的反应的7年研究。研究人员将为另外900名先前标记的成年人标记2500个Brant并记录生殖成功，以估算年龄和特定时间的繁殖概率和生存率和生存率，以及对特定的育雏区域的保真度。研究人员还将继续对生长空间变化的长期研究。 USGS计划在Brant的墨西哥越冬地计划的工作来利用该项目，从而使PIS研究了越冬地点对生殖性能和生存的影响。此外，今年收集的数据将使PI可以测试1997 - 98年ENSO事件中与El Nino效应相关的假设。