Atmospheric nitrogen inputs to the Delaware Inland Bays: the role of ammonia

Scudlark, Joseph R.; Jennings, Jennifer A.; Roadman, Megan J.; Savidge, Karen B.; Ullman, William J.

doi:10.1016/j.envpol.2004.11.017

Cited by 37 publications

(33 citation statements)

References 27 publications

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“…NH 3 emission rates increase as ambient temperature rises (Scudlark et al, 2005). Accordingly, the highest NF for NH 4 + in the summer suggested that neutralization of acid species could be affected by meteorological condition.…”

Section: Major Ion Composition Of the Precipitationmentioning

confidence: 98%

Atmospheric nitrogen deposition and its impact to Lake Sihwa in South Korea from January 2004 to September 2005

et al. 2009

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Atmospheric wet and dry deposition samples collected from three sites (Hwasung, Ansan and Daeboo) around Lake Sihwa, South Korea were used to calculate the atmospheric deposition of nitrogen to the lake and to evaluate its effects on primary production. The analytical parameters included pH, conductivity, and cation (Na + , NH 4 + , K + , Mg 2+ , Ca 2+ ) and anion (Cl -, NO 3 -, SO 4 2-) concentrations. The monthly volume-weighted mean pH of the rainwater ranged from 3.9 to 5.1, with a mean of 4.5, thus showing moderate to strong acidification. Factor analysis indicated that the possible sources for the major ions in the precipitation were anthropogenic/crustal, marine and biomass burning products. Wet deposition varied with season; the highest flux of inorganic nitrogen (NO 3 --N + NH 4 + -N) occurred in the summer and averaged 160 mg/m 2 /month. Less nitrogen was delivered by dry deposition which was highest in spring 2004 (March-May, 23 and 50 mg/m 2 /month for NO 3 --N and NH 4 + -N, respectively). The total annual atmospheric deposition of NH 4 + -N (1100 mg/m 2 / yr) was about twice that of NO 3 --N (560 mg/m 2 /yr). The combined direct deposition to the lake proper was 7.1 × 10 7 g-N/ yr while the estimated annual flux to the entire Lake Sihwa basin was 7.9 × 10 8 g-N/yr. Of the total atmospheric inorganic N entering Lake Sihwa (2.7 × 10 8 g-N/yr), 26% was from direct deposition and 74% from indirect deposition. To estimate the potential impact of atmospheric nitrogen on primary production in the lake, chlorophyll-a equivalents were calculated assuming Redfield stoichiometry; this was estimated to be about 8% of the total chlorophyll-a produced in 2004.

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Section: Major Ion Composition Of the Precipitationmentioning

confidence: 98%

Atmospheric nitrogen deposition and its impact to Lake Sihwa in South Korea from January 2004 to September 2005

et al. 2009

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“…The DIB have been highly eutrophic for decades (Price, 1998). Sources of nutrients include agribusiness runoff (Sallade and Sims, 1997), atmospheric inputs (Scudlark et al, 2005), contaminated groundwater, and sewage treatment plant effluents. In the summer months when nutrient loading is maximal and temperature and light levels are favorable, dense phytoplankton growth occurs (Price, 1998;Rozan et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Using quantitative real-time PCR to study competition and community dynamics among Delaware Inland Bays harmful algae in field and laboratory studies

et al. 2008

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“…Moreover, Itumbiri is a typical rural area in which dominant land uses are the cultivation and free range grazing of cattle and sheep. High concentrations of reduced forms of nitrogen are the signature of the agricultural area with intensive poultry activities [19]. These activities are characterized by emission of NH 3 through fertilizer and livestock by-products.…”

Section: Nhmentioning

confidence: 99%

“… concentration in rain water has been correlated with number of livestock in LA USA [19]. On particular importance to the lake ecosystem, higher concentration of reduced form of nitrogen species may have significant importance in lake ecological functioning since they are more readily assimilated by most aquatic organisms and thus may rapidly or effectively induced a community response than oxidized form [20].…”

Section: Nhmentioning

confidence: 99%

Influence of Land Use Activities on Spatial and Temporal Variation of Nutrient Deposition in Mwanza Region: Implication to the Atmospheric Loading to the Lake Victoria

Vuai¹,

Ibembe²,

Mungai³

2013

ACS

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Increase in population growth and the associated activities have increased the nutrient input to the Lake Victoria through atmosphere and river discharge. Atmospheric input of nutrient is believed to exceed that of river discharge due to relatively higher contribution of water mass to the Lake from atmosphere. However, precipitation characteristics with respect to nutrients have not been well studied to allow qualification and quantification of atmospheric contribution to the Lake Victoria. This study was conducted to investigate influence of land use activities on spatial and temporal variation of nutrient inputs from atmosphere and to estimate atmospheric loading to the Lake Victoria. The results revealed that there is significant spatial and temporal variation of nutrient deposition in the study area. High concentrations of nutrients were observed during short rains starting from September to December. This was attributed to dissolution of nutrients from soil particals and ash residues due to biomass burning accumulated in the atmosphere during dry season of June to August. Spatial variation of nutrients reflects land use activities. Urban and peri-urban areas showed very high concentration of nitrate nitrogen due to industrial and vehicle emission while rural area showed high concentration of phosphorous species and reduced forms of nitrogen species reflecting agricultural activities and animal keeping. Generally, nutrient deposition load was higher in rural area compared to urban with respective values of 15.5 and 13.9 kg·ha −1 ·y −1 for total nitrogen and 6.1 and 2.8 kg·ha·y −1 for total phosphorous. These results suggest that in order to realize significant reduction of nutrient input to the Lake Victoria, measures should be taken to control agricultural activities through proper land use planning. The measure may be directed to reduce biomass burning, emission from industries and vehicle as well as animal residue.

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Atmospheric nitrogen inputs to the Delaware Inland Bays: the role of ammonia

Cited by 37 publications

References 27 publications

Atmospheric nitrogen deposition and its impact to Lake Sihwa in South Korea from January 2004 to September 2005

Atmospheric nitrogen deposition and its impact to Lake Sihwa in South Korea from January 2004 to September 2005

Using quantitative real-time PCR to study competition and community dynamics among Delaware Inland Bays harmful algae in field and laboratory studies

Influence of Land Use Activities on Spatial and Temporal Variation of Nutrient Deposition in Mwanza Region: Implication to the Atmospheric Loading to the Lake Victoria

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