Collaborative research: Regulation of lake productivity by terrestrial dissolved organic matter

合作研究：陆地溶解有机物对湖泊生产力的调节

基本信息

批准号：
1754363
负责人：
Christopher Solomon
金额：
$ 78.78万
依托单位：
Cary Institute of Ecosystem Studies, Inc.
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-04-01 至 2024-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1754363&HistoricalAwards=false
关键词：
Collaborative research Regulation lake productivity

项目摘要

Lakes are economically and culturally important components of the landscape. Microscopic algae and aquatic plants strongly influence the benefits that humans derive from lakes, because they influence water quality and are the foundation of the food web supporting species important to commercial, recreational, and subsistence fisheries. The abundance and growth rate of algae contribute to lake productivity, and lake productivity is affected by inputs of natural and human-derived nutrients, primarily phosphorus and nitrogen. Lake productivity is also influenced by inputs of organic molecules from the watershed which compete with algae for light and, at high concentrations, can result in tea-colored water. Inputs of nutrients and organic molecules from the watershed vary substantially from lake to lake and change through time as well. The researchers will study the implications of watershed inputs for lake water quality, food webs, and other benefits humans derive from lakes. Their research will experimentally test and refine a mathematical model of lake productivity and ultimately predict the response of lakes to watershed inputs of nutrients and organic molecules that vary across the landscape and through time. The project will support the training of six undergraduate students, including students from Puerto Rico and Native American populations. These students will conduct independent research projects as part of a ten-week field ecology program. The researchers will use replicated mesocosm experiments, a comparative study across broad natural gradients, and a whole-lake manipulation to test hypotheses drawn from their mathematical model of lake productivity. First, predicted counteracting effects of terrestrially-derived organic carbon and nutrients will be evaluated using replicated mesocosms subjected to supplies of these elements in varied ratios. Second, the project will use a comparative survey of lake food web productivity to test predictions for how lake size alters the effect of terrestrial organic carbon and nutrients. Third, the researchers will embrace the full complexity of natural ecosystems in a whole-lake manipulation of terrestrial organic carbon and nutrient inputs. Finally, following refinement of the mathematical model of lake productivity based on experimental results, the researchers will use a global meta-analysis to test the general applicability of the mathematical model.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

湖泊在经济和文化上是景观的重要组成部分。微观藻类和水生植物强烈影响人类从湖泊中获得的好处，因为它们会影响水质，并且是对商业，娱乐和生存渔业重要的食物网络支持物种的基础。藻类的丰度和生长速度有助于湖泊生产力，湖泊生产力受到天然和人类衍生营养物质的投入，主要是磷和氮。湖泊生产力还受到来自流域的有机分子的投入的影响，这些分子与藻类竞争光，并以高浓度会导致茶色的水。从湖泊到湖泊的营养物质和有机分子的输入也有很大差异。研究人员将研究流域投入对湖水质量，食物网和其他从湖泊中获得的福利的影响。他们的研究将在实验中测试和完善湖泊生产力的数学模型，并最终预测湖泊对在整个景观和随时间变化的营养和有机分子的分水岭输入的反应。该项目将支持培训六名本科生，包括来自波多黎各和美国原住民人口的学生。这些学生将作为为期十周的现场生态计划的一部分进行独立的研究项目。研究人员将使用复制的中验实验，跨自然梯度的比较研究以及全湖操作来测试从其湖泊生产力的数学模型中得出的假设。首先，将使用经过多种比例的这些元素供应的重复的中焦进行预测的有机碳和养分的抵消作用。其次，该项目将对湖泊食品网络生产力进行比较调查，以测试湖泊大小如何改变陆地有机碳和养分的影响的预测。第三，研究人员将在陆生有机碳和养分输入的全湖操作中包含自然生态系统的全部复杂性。最后，根据实验结果对湖泊生产力的数学模型进行了改进，研究人员将使用全球荟萃分析来测试数学模型的一般适用性。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的审查标准来通过评估来通过评估来获得支持的。

项目成果

期刊论文数量（15）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Species differences, but not habitat, influence catch rate hyperstability across a recreational fishery landscape

物种差异而非栖息地影响休闲渔业景观的捕获率超稳定性

DOI：
10.1016/j.fishres.2022.106438
发表时间：
2022
期刊：
Fisheries Research
影响因子：
2.4
作者：
Mosley, Camille L.;Dassow, Colin J.;Caffarelli, John;Ross, Alexander J.;G. Sass, Greg;Shaw, Stephanie L.;Solomon, Christopher T.;Jones, Stuart E.
通讯作者：
Jones, Stuart E.

Lake Sediment Methane Responses to Organic Matter are Related to Microbial Community Composition in Experimental Microcosms