caa a22 4500 445383488 CHVBK 20180317143024.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10021-010-9400-z doi (NATIONALLICENCE)springer-10.1007/s10021-010-9400-z Wetlands as Sinks for Reactive Nitrogen at Continental and Global Scales: A Meta-Analysis [Elektronische Daten] [Stephen Jordan, Jonathan Stoffer, Janet Nestlerode] Wetlands support physical and ecological functions that result in valuable services to society, including removal of reactive nitrogen (Nr) from surface water and groundwater. We compiled published data from wetland studies worldwide to estimate total Nr removal and to evaluate factors that influence removal rates. Over several orders of magnitude in wetland area and Nr loading rates, there is a positive, near-linear relationship between Nr removal and Nr loading. The linear model (null hypothesis) explains the data better than either a model of declining Nr removal efficiency with increasing Nr loading, or a Michaelis-Menten (saturation) model. We estimate that total Nr removal by major classes of wetlands in the contiguous U.S. is approximately 20-21% of the total anthropogenic load of Nr to the region. Worldwide, Nr removal by wetlands is roughly 17% of anthropogenic Nr inputs. Historical loss of 50% of native wetland area suggests an equivalent loss of Nr removal capacity. Expanded protection and large-scale restoration of wetlands should be considered in strategies to re-balance the global nitrogen cycle and mitigate the negative consequences of excess Nr loading. Springer Science+Business Media, LLC (outside the USA), 2010 nitrogen nationallicence reactive nitrogen nationallicence wetlands nationallicence denitrification nationallicence nitrogen removal nationallicence nitrogen loading nationallicence Jordan Stephen Gulf Ecology Division, U.S. Environmental Protection Agency, 1 Sabine Island Drive, 32561, Gulf Breeze, Florida, USA aut Stoffer Jonathan Department of Marine Biology, Texas A&M University, 5007 Avenue U, 77553, Galveston, Texas, USA aut Nestlerode Janet Gulf Ecology Division, U.S. Environmental Protection Agency, 1 Sabine Island Drive, 32561, Gulf Breeze, Florida, USA aut Ecosystems Springer-Verlag 14/1(2011-01-01), 144-155 1432-9840 14:1<144 2011 14 10021 https://doi.org/10.1007/s10021-010-9400-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-010-9400-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jordan Stephen Gulf Ecology Division, U.S. Environmental Protection Agency, 1 Sabine Island Drive, 32561, Gulf Breeze, Florida, USA aut NATIONALLICENCE 700 1- Stoffer Jonathan Department of Marine Biology, Texas A&M University, 5007 Avenue U, 77553, Galveston, Texas, USA aut NATIONALLICENCE 700 1- Nestlerode Janet Gulf Ecology Division, U.S. Environmental Protection Agency, 1 Sabine Island Drive, 32561, Gulf Breeze, Florida, USA aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/1(2011-01-01), 144-155 1432-9840 14:1<144 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer