Atmospheric nitrogen deposition to the Mullica River-Great Bay Estuary

Ayars, Jennifer; Gao, Yuan

doi:10.1016/j.marenvres.2007.06.004

Cited by 26 publications

(14 citation statements)

References 34 publications

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“…Dry deposition was significant as compared to wet deposition (Tables 1, 2). The result was in agreement with other reports (Anderson and Downing, 2006;Ayars and Gao, 2007;Wang et al, 2003) that the dry deposition of inorganic nitrogen was often equivalent to or even far greater than the amount of wet deposition in some regions. In October 2009, inorganic nitrogen dry deposition (DW) was even larger than wet deposition, due to a long stretch of days with no rain and the least rainfall (Figs.…”

Section: Ratio Correlation Coefficients T-statistic For Paired Differsupporting

confidence: 93%

“…In the atmospheric nitrogen depositions examined in this study, NH4"'^-N and NO3 -N were the main forms of inorganic nitrogen (Ayars and Gao, 2007;Xie et al, 2008); these were primarily derived from NH3 and NOx, which mainly come from agricultural and industrial sources, respectively (Gao, 2002;Xie et al, 2008). The major sources of NH3 are animal excretions, fertilizer application, soils, oceans emissions, and decomposition of organic substances (Galloway et al, 2004;Paerl et al, 2002;Zhu et al, 2005).…”

mentioning

confidence: 87%

“…phosphorus is a principal limiting nutrient, and particulate phosphorus is of biological significance to many ecosystems (Anderson and Downing, 2006). Therefore, the simultaneous monitoring of nitrogen and phosphorus is essential for a better understanding of the contribution of atmospheric deposition to eutrophication as well as to crop nutrients (Ayars and Gao, 2007;Carpenter et al, 1998;Eiser et al, 2009;Smith et al, 2000).…”

mentioning

confidence: 99%

“…The emissions of ammonia into the atmosphere from agricultural activities are quite substantial in China (Akimoto, 2003;Xiong et al, 2008), since excessive nitrogen fertilizer was applied to agricultural ecosystems in recent years (China Agricultural Yearbook, 1985Liu and Diamond, 2005). The sources of NOx include fossil fuel combustion from vehicles and industries, lighting, biomass burning, and transport from the stratosphere (Ayars and Gao, 2007). Because of the rapid growth in transport vehicles and industry, NOx emissions showed an extraordinarily increasing trend since the 1980s in China (Streets and Waldhoff, 2000).…”

mentioning

confidence: 99%

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Year‐Round Atmospheric Wet and Dry Deposition of Nitrogen and Phosphorus on Water and Land Surfaces in Nanjing, China

Sun

et al. 2013

Water Environment Research

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The dry deposition of ammonium, nitrate, and total phosphorus (TP) to both water (DW) and land (DD) surfaces, along with wet deposition, were simultaneously monitored from March 2009 to February 2011 in Nanjing, China. Results showed that wet deposition of total phosphorus was 1.1 kg phosphorus ha (-1)yr(-1), and inorganic nitrogen was 28.7 kg nitrogen ha (-1)yr(-1), with 43% being ammonium nitrogen. Dry deposition of ammonium, nitrate, and total phosphorus, measured by the DW/DD method, was 7.5/2.2 kg nitrogen ha (-1)yr(-1), 6.3/ 4.9 kg nitrogen ha (-1)yr(-1), and 1.9/0.4 kg phosphorus ha (-1)yr(-1), respectively. Significant differences between the DW and DD methods indicated that both methods should be employed simultaneously when analyzing deposition to aquatic and terrestrial ecosystems in watershed areas. The dry deposition of ammonium, nitrate, and total phosphorus contributed 38%, 28%, and 63%, respectively, to the total deposition in the simulated aquatic ecosystem; this has significance for the field of water eutrophication control.

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Section: Ratio Correlation Coefficients T-statistic For Paired Differsupporting

confidence: 93%

mentioning

confidence: 87%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Year‐Round Atmospheric Wet and Dry Deposition of Nitrogen and Phosphorus on Water and Land Surfaces in Nanjing, China

Sun

et al. 2013

Water Environment Research

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“…Coastal marine ecosystems are usually nitrogen (N) limited and influenced by incremental atmospheric N deposition (Paerl, 1995;Ayars and Gao, 2007). A four year study from July 1996 to July 2000 shows that wet deposition of N, as ammonium-N (NH 4 eN), nitrate N (NO 3 eN), and organic N, contributes up to 50% of the total external N flux to the Neuse River Estuary, North Carolina (Whitall et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area

Chen

Hong

Huang³

et al. 2011

Journal of Environmental Management

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Atmospheric Inputs of Nitrogen, Carbon, and Phosphorus across an Urban Area: Unaccounted Fluxes and Canopy Influences

2018

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Rates of atmospheric deposition are declining across the United States, yet urban areas remain hotspots of atmospheric deposition. While past studies show elevated rates of inorganic nitrogen (N) deposition in cities, less is known about atmospheric inputs of organic N, organic carbon (C), and organic and inorganic phosphorus (P), all of which can affect ecosystem processes, water quality, and air quality. Further, the effect of the tree canopy on amounts and forms of nutrients reaching urban ground surfaces is not well‐characterized. We measured growing season rates of total N, organic C, and total P in bulk atmospheric inputs, throughfall, and soil solution around the greater Boston area. We found that organic N constitutes a third of total N inputs, organic C inputs are comparable to rural inputs, and inorganic P inputs are 1.2 times higher than those in sewage effluent. Atmospheric inputs are enhanced two‐to‐eight times in late spring and are elevated beneath tree canopies, suggesting that trees augment atmospheric inputs to ground surfaces. Additionally, throughfall inputs may directly enter runoff when trees extend above impervious surfaces, as is the case with 26.1% of Boston's tree canopy. Our results indicate that the urban atmosphere is a significant source of elemental inputs that may impact urban ecosystems and efforts to improve water quality, particularly in terms of P. Further, as cities create policies encouraging tree planting to provide ecosystem services, locating trees above permeable surfaces to reduce runoff nutrient loads may be essential to managing urban biogeochemical cycling and water quality.

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Atmospheric nitrogen deposition to the Mullica River-Great Bay Estuary

Cited by 26 publications

References 34 publications

Year‐Round Atmospheric Wet and Dry Deposition of Nitrogen and Phosphorus on Water and Land Surfaces in Nanjing, China

Year‐Round Atmospheric Wet and Dry Deposition of Nitrogen and Phosphorus on Water and Land Surfaces in Nanjing, China

Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area

Atmospheric Inputs of Nitrogen, Carbon, and Phosphorus across an Urban Area: Unaccounted Fluxes and Canopy Influences

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