Nonlinear responses in salt marsh functioning to increased nitrogen addition
Salt marshes provide storm protection to shorelines, sequester carbon [C], and mitigate coastal eutrophication. These valuable coastal ecosystems are confronted with increasing nitrogen [N] inputs from anthropogenic sources, such as agricultural runoff, wastewater, and atmospheric deposition. To inf...
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| Otros Autores: | , |
| Formato: | Artículo |
| Lenguaje: | Español |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2015vivanco.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 100 | |9 30802 |a Vivanco, Lucía | ||
| 245 | 0 | 0 | |a Nonlinear responses in salt marsh functioning to increased nitrogen addition |
| 520 | |a Salt marshes provide storm protection to shorelines, sequester carbon [C], and mitigate coastal eutrophication. These valuable coastal ecosystems are confronted with increasing nitrogen [N] inputs from anthropogenic sources, such as agricultural runoff, wastewater, and atmospheric deposition. To inform predictions of salt marsh functioning and sustainability in the future, we characterized the response of a variety of plant, microbial, and sediment responses to a seven-level gradient of N addition in three Californian salt marshes after 7 and 14 months of N addition. The marshes showed variable responses to the experimental N gradient that can be grouped as neutral [root biomass, sediment respiration, potential carbon mineralization, and potential net nitrification], linear [increasing methane flux, decreasing potential net N mineralization, and increasing sediment inorganic N], and nonlinear [saturating aboveground plant biomass and leaf N content, and exponentially increasing sediment inorganic and organic N]. The three salt marshes showed quantitative differences in most ecosystem properties and processes rates; however, the form of the response curves to N addition were generally consistent across the three marshes, indicating that the responses observed may be applicable to other marshes in the region. Only for sediment properties [inorganic and organic N pool] did the shape of the response differ significantly between marshes. Overall, the study suggests salt marshes are limited in their ability to sequester C and N with future increases in N, even without further losses in marsh area. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | 0 | |a UNITED STATES | |
| 653 | 0 | |a TIJUANA RIVER ESTUARY | |
| 653 | 0 | |a TIDAL WETLANDS | |
| 653 | 0 | |a SEDIMENT PROPERTY | |
| 653 | 0 | |a SALTMARSH | |
| 653 | 0 | |a SALICORNIA VIRGINICA | |
| 653 | 0 | |a SALICORNIA | |
| 653 | 0 | |a PICKLEWEED | |
| 653 | 0 | |a NITROGEN | |
| 653 | 0 | |a MORRO BAY ESTUARY | |
| 653 | 0 | |a MORRO BAY | |
| 653 | 0 | |a METHANE FLUX | |
| 653 | 0 | |a METHANE | |
| 653 | 0 | |a EUTROPHICATION | |
| 653 | 0 | |a ECOSYSTEM SERVICES | |
| 653 | 0 | |a ECOSYSTEM FUNCTION | |
| 653 | 0 | |a ECOLOGICAL THRESHOLDS | |
| 653 | 0 | |a DICOTYLEDON | |
| 653 | 0 | |a COASTAL WETLAND | |
| 653 | 0 | |a COASTAL EUTROPHICATION | |
| 653 | 0 | |a CARPINTERIA SALT MARSH | |
| 653 | 0 | |a CARBON SEQUESTRATION | |
| 653 | 0 | |a CALIFORNIA | |
| 653 | 0 | |a ANTHROPOGENIC SOURCE | |
| 700 | 1 | |9 70381 |a Irvine, Irina C. | |
| 700 | 1 | |a Martiny, Jennifer B. H. |9 70382 | |
| 773 | |t Ecology |g vol.96, no.4 (2015), p.936-947 | ||
| 856 | |u http://ri.agro.uba.ar/files/intranet/articulo/2015vivanco.pdf |i En reservorio |q application/pdf |f 2015vivanco |x MIGRADOS2018 | ||
| 856 | |u http://www.esa.org/esa/ |x MIGRADOS2018 |z LINK AL EDITOR | ||
| 942 | 0 | 0 | |c ARTICULO |
| 942 | 0 | 0 | |c ENLINEA |
| 976 | |a AAG | ||