Yuan Danni, Xu Y Jun, Ma Shiwang, Le Jingquan, Zhang Kairui, Miao Rongli, Li Siyue
School of Environmental Ecology and Biological Engineering, Institute of Changjiang Water Environment and Ecological Security, Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430205, China.
School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA; Coastal Studies Institute, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Water Res. 2023 Oct 1;244:120437. doi: 10.1016/j.watres.2023.120437. Epub 2023 Aug 1.
Shallow lakes are numerous in all climate zones, but our knowledge about their dissolved carbon dioxide (CO) response to future climate change and nutrient enrichment is rather limited. Here we performed a mesocosm experiment with four treatments to investigate how warming and nitrogen addition will impact the partial pressure of CO (pCO) and phytoplankton community individually and combined. We found that warming alone had no significant effect on pCO, while nitrogen addition increased pCO significantly. The combined effects of nitrogen addition and warming on pCO level were prevalent, indicating that eutrophic shallow lakes would be double-jeopardized in the future climate. Warming and nitrogen addition together also showed to have changed the phytoplankton community structure, suggesting a potential shifting of biological system in shallow lakes under changing climate. These findings highlight the importance of reducing nitrogen pollution to shallow lake systems for sustainable development goal.
浅水湖泊在所有气候区都很常见，但我们对其溶解二氧化碳（CO）对未来气候变化和养分富集的响应的了解相当有限。在这里，我们进行了一项有四种处理的中宇宙实验，以研究变暖及添加氮如何分别以及共同影响CO的分压（pCO）和浮游植物群落。我们发现，仅变暖对pCO没有显著影响，而添加氮则显著增加了pCO。添加氮和变暖对pCO水平的综合影响很普遍，这表明富营养化浅水湖泊在未来气候中将面临双重危害。变暖与添加氮共同作用还显示改变了浮游植物群落结构，这表明在气候变化的情况下，浅水湖泊的生物系统可能会发生转变。这些发现凸显了为实现可持续发展目标减少对浅水湖泊系统氮污染的重要性。
