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

• 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

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。微型藻类和水生植物强烈影响人类从湖泊中获得的利益，因为它们影响水质，并且是食物网的基础，支持对商业，娱乐和自给性渔业重要的物种。藻类的丰度和生长速度有助于湖泊的生产力，而湖泊的生产力受到自然和人类来源的营养物质（主要是磷和氮）投入的影响。湖泊的生产力也受到来自流域的有机分子的影响，这些有机分子与藻类竞争光线，在高浓度下，可能导致茶色的水。来自流域的营养物质和有机分子的输入因湖泊而异，并且随着时间的推移而变化。研究人员将研究流域输入对湖泊水质，食物网和人类从湖泊中获得的其他好处的影响。他们的研究将通过实验测试和完善湖泊生产力的数学模型，并最终预测湖泊对流域输入的营养物质和有机分子的反应，这些营养物质和有机分子在景观和时间上各不相同。该项目将支持培训6名本科生，包括来自波多黎各和美洲土著居民的学生。这些学生将进行独立的研究项目，作为为期十周的实地生态学计划的一部分。研究人员将使用复制的围隔生态系统实验，跨广泛的自然梯度的比较研究，以及整个湖泊的操作来测试从他们的湖泊生产力数学模型中得出的假设。首先，预测的陆地来源的有机碳和营养物质的抵消作用将评估使用复制的中生态系统受到供应这些元素在不同的比例。其次，该项目将利用湖泊食物网生产力的比较调查来测试湖泊大小如何改变陆地有机碳和营养物的影响的预测。第三，研究人员将在对陆地有机碳和养分输入的全湖操纵中拥抱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改进后，研究人员将使用全球荟萃分析来测试数学模型的普遍适用性。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

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.

Hydrologic Export of Soil Organic Carbon: Continental Variation and Implications

土壤有机碳的水文输出：大陆变化及其影响

• DOI: 10.1029/2021gb007161
• 发表时间: 2022
• 期刊: Global Biogeochemical Cycles
• 影响因子: 5.2
• 作者: Hararuk, O.;Jones, S. E.;Solomon, C. T.
• 通讯作者: Solomon, C. T.

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

• DOI: 10.3389/fenvs.2022.834829
• 发表时间: 2022-03
• 作者: B. Bertolet;C. Koepfli;Stuart E. Jones

Climate Change and Teleconnections Amplify Lake Stratification With Differential Local Controls of Surface Water Warming and Deep Water Cooling

• DOI: 10.1029/2020gl090959
• 发表时间: 2021-01
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: I. Oleksy;D. C. Richardson

Chlorophyll–total phosphorus relationships emerge from multiscale interactions from algae to catchments

叶绿素与总磷的关系源于从藻类到流域的多尺度相互作用

• DOI: 10.1002/lol2.10281
• 发表时间: 2022
• 期刊: Limnology and Oceanography Letters
• 影响因子: 7.8
• 作者: Olson, Carly R.;Jones, Stuart E.
• 通讯作者: Jones, Stuart E.