PRF: Algal Community Responses to Landscape Disturbance and Nutrient Dynamics along Land-Inland Water Ecotones

PRF：藻类群落对陆地-内陆水域生态交错带景观干扰和养分动态的反应

基本信息

批准号：
9103680
负责人：
Heath Carney
金额：
$ 3.48万
依托单位：
Fellowships
依托单位国家：
美国
项目类别：
Fellowship Award
财政年份：
1991
资助国家：
美国
起止时间：
1991-08-01 至 1993-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9103680&HistoricalAwards=false
关键词：
PRF Algal Community Responses Landscape

项目摘要

The principal objective of the proposed research is to describe and explain how community composition and nutrient limitation of aquatic primary producers (especially algae) are influenced by land use and ecotonal complexity in the Andean Altiplano. The four large-scale nutrient flux treatments to be compared are: ancient raised fields currently under rehabilitation vs. flat pastures and fields (now more common), and complex littoral ecotones (shallow slopes) vs. simple ecotones (steeply sloping shorelines). Several hypotheses derived from the "big perturbation" of anthropogenic land-use changes are constructed as tests. Field sampling and measurements will take place in stream surface water between agricultural fields and the lake, and in nearshore zones of several drainage systems. Analyses will be primarily for the major forms of nitrogen and phosphorus, bioassay studies of nutrient limitation, and aquatic biological responses. Thus, nutrient-algal relations will be tested with both large-scale landscape treatments and more controlled bioassay experiments. These studies will be coordinated with ongoing field investigations by other scientists of: nutrient dynamics in agricultural fields, remote sensing and GIS-based modeling of land-water interactions, and archeological and paleolimnological studies of land use history.

拟议研究的主要目标是描述和解释水生生产者（尤其是藻类）的社区组成和营养局限性如何受到安第斯山脉Altiplano的土地利用和生态复杂性的影响。要比较的四种大规模营养通量治疗是：当前正在康复的较高的田野与平坦的牧场和田野（现在更常见），以及复杂的沿海生物酮（浅坡度）（浅坡度）与简单的ecotones（陡峭的倾斜海岸线）。源自人为土地利用变化的“大扰动”的几种假设是作为测试的。现场采样和测量将在农田和湖泊之间的溪流地表水以及几个排水系统的近岸区域进行。分析将主要用于氮和磷的主要形式，营养限制的生物测定研究以及水生生物学反应。因此，将通过大规模景观处理和更受控的生物测定实验来测试营养 - 阿尔加尔关系。这些研究将与其他科学家的持续现场调查协调：农业领域的营养动态，遥感和基于GIS的土地水相互作用建模，以及土地使用历史的考古学和古学研究。