Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide
Mike Peacock,Joachim Audet,David Bastviken,Sarah Cook,Chris D. Evans,Alistair Grinham,Meredith A. Holgerson,Lars Högbom,Amy Pickard,Piotr Zieliński,Martyn N. Futter +10 more
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In this article, the authors measured emissions from nine ponds and seven ditches over a full year and found that the concentrations of GHGs were positively related to nutrient status (C, N, P), and ponds GHG concentrations were highest in smallest waterbodies.Abstract:
Inland waters play an active role in the global carbon cycle and emit large volumes of the greenhouse gases (GHGs) methane (CH ) and carbon dioxide (CO ). A considerable body of research has improved emissions estimates from lakes, reservoirs, and rivers but recent attention has been drawn to the importance of small, artificial waterbodies as poorly quantified but potentially important emission hotspots. Of particular interest are emissions from drainage ditches and constructed ponds. These waterbody types are prevalent in many landscapes and their cumulative surface areas can be substantial. Furthermore, GHG emissions from constructed waterbodies are anthropogenic in origin and form part of national emissions reporting, whereas emissions from natural water bodies do not (according to Intergovernmental Panel on Climate Change guidelines). Here, we present GHG data from two complementary studies covering a range of land uses. In the first, we measured emissions from nine ponds and seven ditches over a full year. Annual emissions varied considerably: 0.1 - 44.3 g CH m yr and -36 - 4421 g CO m yr . In the second, we measured GHG concentrations in 96 ponds and 64 ditches across seven countries, covering subtropical, temperate and sub-arctic biomes. When CH emissions were converted to CO equivalents, 93% of waterbodies were GHG sources. In both studies, GHGs were positively related to nutrient status (C, N, P), and pond GHG concentrations were highest in smallest waterbodies. Ditch and pond emissions were larger per unit area when compared to equivalent natural systems (streams, natural ponds). We show that GHG emissions from natural systems should not be used as proxies for those from artificial waterbodies, and that artificial waterbodies have the potential to make a substantial but largely unquantified contribution to emissions from the Agriculture, Forestry and Other Land Use sector, and the global carbon cycle.read more
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Feedback between climate change and eutrophication: revisiting the allied attack concept and how to strike back
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Greenhouse Gases Trade-Off from Ponds: An Overview of Emission Process and Their Driving Factors
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TL;DR: In this article , a detailed analysis of the GHG emissions mechanisms, processes, and methods of measurement from ponds is presented, and key factors affecting the emissions rate are discussed, including temperature, nutrients, pH, dissolved oxygen, sediments, water depth, etc.
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TL;DR: Wang et al. as mentioned in this paper analyzed the literature data on CO 2 and CH 4 fluxes from various aquaculture systems in China, and found that small and shallow systems had significantly higher emissions, with chlorophyll a and dissolved oxygen concentrations as the main environmental drivers.
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