Understanding nutrient biogeochemistry in agricultural catchments: the challenge of appropriate monitoring frequenciesElectronic supplementary information (ESI) available. See DOI: 10.1039/c4em00100a
We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments. We focus on three nutrient fractions, nitrate-nitrogen (NO 3 -N), total reactive phosphorus (TRP) and total phosphorus (TP) observed using conventional remote l...
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description | We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments. We focus on three nutrient fractions, nitrate-nitrogen (NO
3
-N), total reactive phosphorus (TRP) and total phosphorus (TP) observed using conventional remote laboratory-based, low-frequency sampling and automated,
in situ
high-frequency monitoring. We demonstrate the value of low-frequency routine nutrient monitoring in providing long-term data on changes in surface water and groundwater nutrient concentrations. By contrast, automated high-frequency nutrient observations provide insight into the fine temporal structure of nutrient dynamics in response to a full spectrum of flow dynamics. We found good agreement between concurrent
in situ
and laboratory-based determinations for nitrate-nitrogen (Pearson's
R
= 0.93,
p
< 0.01). For phosphorus fractions: TP (
R
= 0.84,
p
< 0.01) and TRP (
R
= 0.79,
p
< 0.01) the relationships were poorer due to the underestimation of P fractions observed
in situ
and storage-related changes of grab samples. A detailed comparison between concurrent nutrient data obtained by the hourly
in situ
automated monitoring and weekly-to-fortnightly grab sampling reveals a significant information loss at the extreme range of nutrient concentration for low-frequency sampling.
We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments. |
doi_str_mv | 10.1039/c4em00100a |
format | Article |
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3
-N), total reactive phosphorus (TRP) and total phosphorus (TP) observed using conventional remote laboratory-based, low-frequency sampling and automated,
in situ
high-frequency monitoring. We demonstrate the value of low-frequency routine nutrient monitoring in providing long-term data on changes in surface water and groundwater nutrient concentrations. By contrast, automated high-frequency nutrient observations provide insight into the fine temporal structure of nutrient dynamics in response to a full spectrum of flow dynamics. We found good agreement between concurrent
in situ
and laboratory-based determinations for nitrate-nitrogen (Pearson's
R
= 0.93,
p
< 0.01). For phosphorus fractions: TP (
R
= 0.84,
p
< 0.01) and TRP (
R
= 0.79,
p
< 0.01) the relationships were poorer due to the underestimation of P fractions observed
in situ
and storage-related changes of grab samples. A detailed comparison between concurrent nutrient data obtained by the hourly
in situ
automated monitoring and weekly-to-fortnightly grab sampling reveals a significant information loss at the extreme range of nutrient concentration for low-frequency sampling.
We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments.</description><identifier>ISSN: 2050-7887</identifier><identifier>EISSN: 2050-7895</identifier><identifier>DOI: 10.1039/c4em00100a</identifier><language>eng</language><creationdate>2014-06</creationdate><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids></links><search><creatorcontrib>Bieroza, M. Z</creatorcontrib><creatorcontrib>Heathwaite, A. L</creatorcontrib><creatorcontrib>Mullinger, N. J</creatorcontrib><creatorcontrib>Keenan, P. O</creatorcontrib><title>Understanding nutrient biogeochemistry in agricultural catchments: the challenge of appropriate monitoring frequenciesElectronic supplementary information (ESI) available. See DOI: 10.1039/c4em00100a</title><description>We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments. We focus on three nutrient fractions, nitrate-nitrogen (NO
3
-N), total reactive phosphorus (TRP) and total phosphorus (TP) observed using conventional remote laboratory-based, low-frequency sampling and automated,
in situ
high-frequency monitoring. We demonstrate the value of low-frequency routine nutrient monitoring in providing long-term data on changes in surface water and groundwater nutrient concentrations. By contrast, automated high-frequency nutrient observations provide insight into the fine temporal structure of nutrient dynamics in response to a full spectrum of flow dynamics. We found good agreement between concurrent
in situ
and laboratory-based determinations for nitrate-nitrogen (Pearson's
R
= 0.93,
p
< 0.01). For phosphorus fractions: TP (
R
= 0.84,
p
< 0.01) and TRP (
R
= 0.79,
p
< 0.01) the relationships were poorer due to the underestimation of P fractions observed
in situ
and storage-related changes of grab samples. A detailed comparison between concurrent nutrient data obtained by the hourly
in situ
automated monitoring and weekly-to-fortnightly grab sampling reveals a significant information loss at the extreme range of nutrient concentration for low-frequency sampling.
We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments.</description><issn>2050-7887</issn><issn>2050-7895</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNqFjz1Pw0AMhk8IJCrowo5kNhhaLpTQtCsE0YmhMEfuxUkO3Re-CxK_kL_VFCEYkMCLLT2vHttCnGRymsnZ4lJdk5UykxL3xOhK5nIyLxb5_vdczA_FOMYXOVSRZ0V-MxIfz64mjgldrV0Lrk-sySXYaN-SVx1ZHRO_g3aALWvVm9QzGlCYVGeHZFxC6ghUh8aQawl8AxgC-8AaE4H1TifPO3nD9NqTU5piaUglHpCC2IdgaKfCzz2NZ4tJewfn5Xp1AfiG2uDG0BTWRHD3uFrC74-PxUGDJtL4qx-J0_vy6fZhwlFVwyl2kFc_8dn__OwvXoW6mW0BOY537A</recordid><startdate>20140625</startdate><enddate>20140625</enddate><creator>Bieroza, M. Z</creator><creator>Heathwaite, A. L</creator><creator>Mullinger, N. J</creator><creator>Keenan, P. O</creator><scope/></search><sort><creationdate>20140625</creationdate><title>Understanding nutrient biogeochemistry in agricultural catchments: the challenge of appropriate monitoring frequenciesElectronic supplementary information (ESI) available. See DOI: 10.1039/c4em00100a</title><author>Bieroza, M. Z ; Heathwaite, A. L ; Mullinger, N. J ; Keenan, P. O</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-rsc_primary_c4em00100a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bieroza, M. Z</creatorcontrib><creatorcontrib>Heathwaite, A. L</creatorcontrib><creatorcontrib>Mullinger, N. J</creatorcontrib><creatorcontrib>Keenan, P. O</creatorcontrib></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bieroza, M. Z</au><au>Heathwaite, A. L</au><au>Mullinger, N. J</au><au>Keenan, P. O</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Understanding nutrient biogeochemistry in agricultural catchments: the challenge of appropriate monitoring frequenciesElectronic supplementary information (ESI) available. See DOI: 10.1039/c4em00100a</atitle><date>2014-06-25</date><risdate>2014</risdate><volume>16</volume><issue>7</issue><spage>1676</spage><epage>1691</epage><pages>1676-1691</pages><issn>2050-7887</issn><eissn>2050-7895</eissn><abstract>We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments. We focus on three nutrient fractions, nitrate-nitrogen (NO
3
-N), total reactive phosphorus (TRP) and total phosphorus (TP) observed using conventional remote laboratory-based, low-frequency sampling and automated,
in situ
high-frequency monitoring. We demonstrate the value of low-frequency routine nutrient monitoring in providing long-term data on changes in surface water and groundwater nutrient concentrations. By contrast, automated high-frequency nutrient observations provide insight into the fine temporal structure of nutrient dynamics in response to a full spectrum of flow dynamics. We found good agreement between concurrent
in situ
and laboratory-based determinations for nitrate-nitrogen (Pearson's
R
= 0.93,
p
< 0.01). For phosphorus fractions: TP (
R
= 0.84,
p
< 0.01) and TRP (
R
= 0.79,
p
< 0.01) the relationships were poorer due to the underestimation of P fractions observed
in situ
and storage-related changes of grab samples. A detailed comparison between concurrent nutrient data obtained by the hourly
in situ
automated monitoring and weekly-to-fortnightly grab sampling reveals a significant information loss at the extreme range of nutrient concentration for low-frequency sampling.
We evaluate different frequencies of riverine nutrient concentration measurement to interpret diffuse pollution in agricultural catchments.</abstract><doi>10.1039/c4em00100a</doi><tpages>16</tpages></addata></record> |
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title | Understanding nutrient biogeochemistry in agricultural catchments: the challenge of appropriate monitoring frequenciesElectronic supplementary information (ESI) available. See DOI: 10.1039/c4em00100a |
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