Net anthropogenic phosphorus inputs: spatial and temporal variability in the Chesapeake Bay region

Russell, Marc; Weller, Donald E.; Jordan, Thomas E.; Sigwart, Kevin J.; Sullivan, Kathryn J.

doi:10.1007/s10533-008-9212-9

Cited by 138 publications

(129 citation statements)

References 65 publications

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“…4a), since the high flow regime mainly occurs in the summer when high temperature and sunlight contribute to algae growth . As expected, annual riverine TP flux was significantly correlated with NAPI, consistent with previous studies (Borbor-Cordova et al, 2006;Russell et al, 2008;Han et al, 2011a;Hong et al, 2012). Similar to NAPI, both NAPI AF and NAPI R presented significant correlations with riverine TP flux ( Table 2).…”

Section: Response Of Riverine Tp Export To Changes In Phosphorus Budgetssupporting

confidence: 91%

“…As in previous studies (Russell et al, 2008;Han et al, 2013), net anthropogenic P input budgets (NAPI, kg P ha À1 yr À1 ) were calculated as the sum of five major components: atmospheric P deposition (APD), chemical fertilizer P application (CF), non-food input (NFI, i.e., detergent P), seed input (SI), and net food and feed input (NFFI):…”

Section: Phosphorus Budget Calculations and Uncertainty Analysismentioning

confidence: 99%

“…The extent of riverine P export is dependent on various factors, such as anthropogenic P inputs (Russell et al, 2008;Hong et al, 2012), hydroclimate (Sharpley et al, 2008), and land-use/land-management practices (Sobota et al, 2011;Duan et al, 2012). Therefore, an integrated and quantitative understanding of the factors controlling P export from landscapes is required for predicting the response of riverine P export to changes of human activities and climate, and effectively guiding watershed P management measures to protect water quality.…”

Section: Introductionmentioning

confidence: 99%

“…Calculation of net anthropogenic phosphorus input (NAPI) is a P budgeting approach that sums annual P contributions from atmospheric deposition, fertilizer application, non-food input (i.e., detergent P), seed input, and net import/export in animal feed and human food supplies (Han et al, 2013). The NAPI approach has been successfully applied to many watersheds across Asia (Han et al, 2011b(Han et al, , 2013Chen et al, 2015a), the Americas (David and Gentry, 2000;Borbor-Cordova et al, 2006;Han et al, 2011a;Russell et al, 2008;Sobota et al, 2011), and Europe (Hong et al, 2012). It is a simple yet powerful approach to evaluate net P inputs from anthropogenic sources to terrestrial ecosystems, as well as an effective tool to explain among-watershed or among-year variations in riverine P exports.…”

Section: Introductionmentioning

confidence: 99%

“…It is commonly observed that years with higher precipitation or river discharge export a higher fraction of NAPI via rivers (Borbor-Cordova et al, 2006;Russell et al, 2008;Han et al, 2011a;Sobota et al, 2011;Hong et al, 2012;Chen et al, 2015a), and agricultural watersheds with tile drainage generally export a higher fraction of NAPI (Gentry et al, 2007;Han et al, 2011a;Morse and Wollheim, 2014). In addition, legacy P (i.e., surplus P stored in watershed landscapes that is derived from anthropogenic P inputs in previous years) can be remobilized or recycled after land management change (Meals et al, 2010;Sharpley et al, 2013) or when the degree of landscape P saturation increases after longterm excessive P addition (Kleinman et al, 2011), yielding a considerable P flux to downstream waterbodies Haygarth et al, 2014;Chen et al, 2015a).…”

Section: Introductionmentioning

confidence: 99%

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Factors controlling phosphorus export from agricultural/forest and residential systems to rivers in eastern China, 1980–2011

Chen

Wang

et al. 2016

Journal of Hydrology

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s u m m a r yThis study quantified long-term response of riverine total phosphorus (TP) export to changes in land-use, climate, and net anthropogenic phosphorus inputs to agricultural/forest (NAPI AF ) and residential (NAPI R ) systems for the upper Jiaojiang watershed in eastern China. Annual NAPI AF rose by 73% in 1980-1999 followed by a 41% decline in 2000-2011, while NAPI R continuously increased by 122% over the 1980-2011 period. Land-use showed a 63% increase in developed land area (D%) and a 91% increase in use of efficient drainage systems on agricultural land area (AD%) over the study period. Although no significant trends were observed in annual river discharge or precipitation, the annual number of storm events rose by 90% along with a 34% increase in the coefficient of variation of daily rainfall. In response to changes of NAPI AF , NAPI R , land-use and precipitation patterns, riverine TP flux increased 16.0-fold over the 32-year record. Phosphorus export via erosion and leaching was the dominant pathway for P delivery to rivers. An empirical model incorporating annual NAPI AF , NAPI R , precipitation, D%, and AD% was developed (R 2 = 0.96) for apportioning riverine TP sources and predicting annual riverine TP fluxes. The model estimated that NAPI AF , NAPI R and legacy P sources contributed 19-56%, 16-67% and 13-32% of annual riverine TP flux in 1980-2011, respectively. Compared to reduction of NAPI AF , reduction of NAPI R was predicted to have a greater immediate impact on decreasing riverine TP fluxes. Changes in anthropogenic P input sources (NAPI AF vs. NAPI R ), land-use, and precipitation patterns as well as the legacy P source can amplify P export from landscapes to rivers and should be considered in developing P management strategies to reduce riverine P fluxes.

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Section: Response Of Riverine Tp Export To Changes In Phosphorus Budgetssupporting

confidence: 91%

Section: Phosphorus Budget Calculations and Uncertainty Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Factors controlling phosphorus export from agricultural/forest and residential systems to rivers in eastern China, 1980–2011

Chen

Wang

et al. 2016

Journal of Hydrology

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Nitrogen and phosphorus fluxes from watersheds of the northeast U.S. from 1930 to 2000: Role of anthropogenic nutrient inputs, infrastructure, and runoff

Hale

Grimm

Vörösmarty

et al. 2015

Global Biogeochemical Cycles

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An ongoing challenge for society is to harness the benefits of nutrients, nitrogen (N) and phosphorus (P), while minimizing their negative effects on ecosystems. While there is a good understanding of the mechanisms of nutrient delivery at small scales, it is unknown how nutrient transport and processing scale up to larger watersheds and whole regions over long time periods. We used a model that incorporates nutrient inputs to watersheds, hydrology, and infrastructure (sewers, wastewater treatment plants, and reservoirs) to reconstruct historic nutrient yields for the northeastern U.S. from 1930 to 2002. Over the study period, yields of nutrients increased significantly from some watersheds and decreased in others. As a result, at the regional scale, the total yield of N and P from the region did not change significantly. Temporal variation in regional N and P yields was correlated with runoff coefficient, but not with nutrient inputs. Spatial patterns of N and P yields were best predicted by nutrient inputs, but the correlation between inputs and yields across watersheds decreased over the study period. The effect of infrastructure on yields was minimal relative to the importance of soils and rivers. However, infrastructure appeared to alter the relationships between inputs and yields. The role of infrastructure changed over time and was important in creating spatial and temporal heterogeneity in nutrient input-yield relationships.

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Increased nitrogen export from eastern North America to the Atlantic Ocean due to climatic and anthropogenic changes during 1901–2008

et al. 2015

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Nitrogen export demonstrated substantial spatial variability across the study area. Increased NH 4 + export mainly occurred around major cities in the MAB. NO 3 À export increased in most parts of the MAB but decreased in parts of the GOM. Enhanced DON export was mainly distributed in the GOM and the SAB. PON export increased in coastal areas of the SAB and northern parts of the GOM but decreased in the Piedmont areas and the eastern parts of the MAB. Climate was the primary reason for interannual variability in nitrogen export; fertilizer use and nitrogen deposition tended to enhance the export of all nitrogen species; livestock farming and sewage discharge were also responsible for the increases in NH 4 + and NO 3 À fluxes; and land cover change (especially reforestation of former agricultural land) reduced the export of the four nitrogen species.

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Net anthropogenic phosphorus inputs: spatial and temporal variability in the Chesapeake Bay region

Cited by 138 publications

References 65 publications

Factors controlling phosphorus export from agricultural/forest and residential systems to rivers in eastern China, 1980–2011

Factors controlling phosphorus export from agricultural/forest and residential systems to rivers in eastern China, 1980–2011

Nitrogen and phosphorus fluxes from watersheds of the northeast U.S. from 1930 to 2000: Role of anthropogenic nutrient inputs, infrastructure, and runoff

Increased nitrogen export from eastern North America to the Atlantic Ocean due to climatic and anthropogenic changes during 1901–2008

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