Impact of abiotic and biotic factors on GHG emissions from rural ponds in Ankara

Date

2024-7

Author

Oğuz, Gizem

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Within the context of PONDERFUL (Pond Ecosystems for Resilient Future Landscapes in a Changing Climate), an EU-H2020 funded project, contributing to the second work package of the project (WP2), 30 rural ponds in the Northwestern side of Ankara were studied in the spring, summer, and autumn of 2022. This study aims to investigate the impact of abiotic and biotic factors on greenhouse gas (GHG) emissions from ponds in rural Ankara. GHG emissions, particularly carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), from ponds have received little attention until now. Ponds were selected based on their area, depth, elevation, hydroperiod, hydrological connections and percent emergent vegetation for this study, and the GHG emission samples were collected using closed chambers in 3 consecutive seasons in 2022. The findings of this study showed that the most crucial factors affecting the GHG emissions were the nutrient concentrations and O2 saturation. CH4 and CO2 emissions affected from nutrient concentrations and there was a positive relationship between nutrient concentrations and emissions, higher emissions were observed in ponds with high nutrient concentrations. O2 saturation showed a negative relationship, and higher emissions were observed in low O2 saturation. N2O emissions depended heavily on nitrogen derivatives, ponds with higher nitrogen concentrations had higher emissions. The findings of this study show that eutrophic ponds with more nutrient availability and anoxic conditions promote the release of greenhouse gases. This can help to inform policies aimed at reducing greenhouse gas emissions and mitigating climate change.

Subject Keywords

rural ponds, GHG emissions, methane, carbon dioxide, nitrous oxide

URI

https://hdl.handle.net/11511/110823

Collections

Graduate School of Natural and Applied Sciences, Thesis