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| DOI: | 10.1007/s11252-017-0684-z |
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| Web URL(s): | https://link.springer.com/article/10.1007/s11252-017-0684-z
Last checked: 08/08/2017
Access conditions: Item is within a limited-access website
https://link.springer.com/content/pdf/10.1007%2Fs11252-017-0684-z.pdf
Last checked: 08/08/2017
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| Publication Type:
| Refereed |
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| Author(s): | Herrmann, Dustin L.;
Cadenasso, Mary L. |
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| Author Affiliation: | Herrmann: Graduate Group in Ecology, University of California, Davis, CA and Oak Ridge Institute for Science and Education Research Program, Oak Ridge, TN; Cadenasso: Department of Plant Sciences, University of California, Davis, CA |
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| Title: | Nitrogen retention and loss in unfertilized lawns across a light gradient |
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| Source: | Urban Ecosystems. Vol. 20, No. 6, December 2017, p. 1319-1330. |
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| Publishing Information: | Andover, Hants, United Kingdom: Chapman and Hall |
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| # of Pages: | 12 |
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| Related Web URL: | https://link.springer.com/article/10.1007/s11252-017-0684-z#abs1
Last checked: 08/15/2017
Notes: Abstract only
https://static-content.springer.com/esm/art%3A10.1007%2Fs11252-017-0684-z/MediaObjects/11252_2017_684_MOESM1_ESM.docx
Last checked: 08/15/2017
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Notes: Supplementary table |
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| Keywords: | TIC Keywords: Comparisons; Daily light integral; Denitrification; Evaluations; Nitrogen cycle; Nitrogen losses; Nitrogen retention; Urban landscaping
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| Abstract/Contents: | "A desirable function for terrestrial urban ecosystems is the mitigation of nitrogen (N) pollution associated with cities and suburbs. To assist in maximizing this function, identifying locations of sources and sinks of N in the urban environment is crucial to inform management strategies. Lawns are an extensive land cover in urbanized landscapes, and in general, they have demonstrated the capacity to function as a sink for N inputs. How N is cycled by lawns, however, is likely not uniform across the physical heterogeneity or management activities that exist in lawns. We investigated the influence of heterogeneity in light availability on N cycling in lawns that were irrigated but not fertilized. Light availability is affected by tree canopy and built structures and is, therefore, heterogeneous both within individual lawns and among lawns. Light is expected to control N retention and loss through effects on primary productivity. We experimentally examined N regulation over one calendar year by measuring net primary production (NPP), N retention using an isotopic tracer, and N leaching in existing unfertilized lawns under heterogeneous light conditions. We used a budgetary approach to estimate gaseous N loss which we assume is primarily via denitrification. Light functioned as a limiting resource for primary productivity. From low to high light conditions, annual NPP increased 177 to 430 g C·m-2·y-1 and retention of N isotope tracer increased from 50 to 65% as a result of increased retention in plants. Nitrate leaching losses were low overall and were not affected by light levels. Light availability regulated the fate of N inputs and unfertilized lawns may function as substantial sinks for reactive N through storage in the terrestrial system and N loss by denitrification. However, whether or not denitrification is generally an N sink will depend on the ratio of non-reactive (i.e., N2) to reactive (i.e., N2O, NO) denitrification products. Overall, we find that effective strategies for managing N sources and sinks in cities will likely need to consider light availability, particularly in systems receiving water subsidies via irrigation." |
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| Language: | English |
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| References: | 62 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Herrmann, D. L., and M. L. Cadenasso. 2017. Nitrogen retention and loss in unfertilized lawns across a light gradient. Urban Ecosystems. 20(6):p. 1319-1330. |
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| DOI: 10.1007/s11252-017-0684-z |
| Web URL(s):
https://link.springer.com/article/10.1007/s11252-017-0684-z
Last checked: 08/08/2017
Access conditions: Item is within a limited-access website
https://link.springer.com/content/pdf/10.1007%2Fs11252-017-0684-z.pdf
Last checked: 08/08/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b4896713 |
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