Dissolved and gaseous nitrogen losses in forests controlled by soil nutrient stoichiometry

0585430 - ÚVGZ 2025 CZ eng K - Conference Paper (Czech conference)
Oulehle, Filip - Chuman, T. - Hruška, Jakub - Krám, Pavel - Navrátil, Tomáš - Tesař, Miroslav - Ač, Alexander - Urban, Otmar
Dissolved and gaseous nitrogen losses in forests controlled by soil nutrient stoichiometry.
Hydrologie malého povodí 2023. Praha: Ústav pro hydrodynamiku AV ČR, 2023 - (Hnilicová, S.; Tesař, M.), s. 165-168. ISBN 978-80-87117-22-4.
[Hydrologie malého povodí 2023. Praha (CZ), 30.05.2023-01.06.2023]
Institutional support: RVO:86652079 ; RVO:67985831 ; RVO:67985874
Keywords : nitrogen * catchment * isotope * mass balance * denitrification * carbon * sequestration
OECD category: Hydrology; Hydrology (UH-J); Hydrology (GLU-S)

This study investigates the consequences of chronic nitrogen deposition in forests, including its effects on soil and surface water quality, and greenhouse gas emissions. To predict these effects, the authors explore the controls over dissolved and gaseous nitrogen fluxes in temperate forests. Their findings indicate that stream leaching losses of dissolved nitrogen correspond with the nutrient stoichiometry
of the forest floor, with stream N losses increasing as ecosystems progress towards phosphorus limitation. Soil nitrogen storage increases with oxalate extractable iron and aluminium content. The authors estimate soil gaseous losses based on 15 N stocks, which averaged 2.5±2.2 kg N ha-1 year-1 , comprising 20±14% of total nitrogen deposition. They also extrapolate the current gaseous nitrogen loss flux from forests globally to be 8.9 Tg N year-1 , which represents 39% of current nitrogen deposition to forests worldwide.
Permanent Link: https://hdl.handle.net/11104/0353140