Changes in the yield of microphytobenthic chlorophyll from nutrients

considering denitrification

Ana C. Brito, Alice Newton, Paul Tett, Teresa F. Fernandes

    Research output: Contribution to journalArticle

    Abstract

    The yield of microphytobenthic (MPB) chlorophyll from nitrogen expresses the relationship between chlorophyll formation and nutrient consumption within the surface sediment. In shallow coastal lagoons MPB have an important role in chlorophyll dynamics and may represent the majority of microalgal chlorophyll pigments. Given that chlorophyll has been used as an indicator of eutrophication, the yield is of utmost importance. Furthermore, the yield is a key parameter in models that aims at predicting eutrophication.

    Estimates of the MPB yield have been previously obtained from a series of microcosm experiments. However, discrepant results in nitrogen fluxes suggested the importance of other processes such as denitrification. Therefore, denitrification rates were used for the calculation of nutrient fluxes and new yield estimates were obtained for muddy sediments. Whereas the earlier estimate obtained was of 4.1 mu g chl. (mu mol N)(-1), after including the denitrification rate in the calculation this value was reduced from 5 to 35%. (C) 2011 Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)226-230
    Number of pages5
    JournalEcological Indicators
    Volume19
    DOIs
    Publication statusPublished - Aug 2012

    Cite this

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    title = "Changes in the yield of microphytobenthic chlorophyll from nutrients: considering denitrification",
    abstract = "The yield of microphytobenthic (MPB) chlorophyll from nitrogen expresses the relationship between chlorophyll formation and nutrient consumption within the surface sediment. In shallow coastal lagoons MPB have an important role in chlorophyll dynamics and may represent the majority of microalgal chlorophyll pigments. Given that chlorophyll has been used as an indicator of eutrophication, the yield is of utmost importance. Furthermore, the yield is a key parameter in models that aims at predicting eutrophication.Estimates of the MPB yield have been previously obtained from a series of microcosm experiments. However, discrepant results in nitrogen fluxes suggested the importance of other processes such as denitrification. Therefore, denitrification rates were used for the calculation of nutrient fluxes and new yield estimates were obtained for muddy sediments. Whereas the earlier estimate obtained was of 4.1 mu g chl. (mu mol N)(-1), after including the denitrification rate in the calculation this value was reduced from 5 to 35{\%}. (C) 2011 Elsevier Ltd. All rights reserved.",
    author = "Brito, {Ana C.} and Alice Newton and Paul Tett and Fernandes, {Teresa F.}",
    year = "2012",
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    Changes in the yield of microphytobenthic chlorophyll from nutrients : considering denitrification. / Brito, Ana C.; Newton, Alice; Tett, Paul; Fernandes, Teresa F.

    In: Ecological Indicators, Vol. 19, 08.2012, p. 226-230.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Changes in the yield of microphytobenthic chlorophyll from nutrients

    T2 - considering denitrification

    AU - Brito, Ana C.

    AU - Newton, Alice

    AU - Tett, Paul

    AU - Fernandes, Teresa F.

    PY - 2012/8

    Y1 - 2012/8

    N2 - The yield of microphytobenthic (MPB) chlorophyll from nitrogen expresses the relationship between chlorophyll formation and nutrient consumption within the surface sediment. In shallow coastal lagoons MPB have an important role in chlorophyll dynamics and may represent the majority of microalgal chlorophyll pigments. Given that chlorophyll has been used as an indicator of eutrophication, the yield is of utmost importance. Furthermore, the yield is a key parameter in models that aims at predicting eutrophication.Estimates of the MPB yield have been previously obtained from a series of microcosm experiments. However, discrepant results in nitrogen fluxes suggested the importance of other processes such as denitrification. Therefore, denitrification rates were used for the calculation of nutrient fluxes and new yield estimates were obtained for muddy sediments. Whereas the earlier estimate obtained was of 4.1 mu g chl. (mu mol N)(-1), after including the denitrification rate in the calculation this value was reduced from 5 to 35%. (C) 2011 Elsevier Ltd. All rights reserved.

    AB - The yield of microphytobenthic (MPB) chlorophyll from nitrogen expresses the relationship between chlorophyll formation and nutrient consumption within the surface sediment. In shallow coastal lagoons MPB have an important role in chlorophyll dynamics and may represent the majority of microalgal chlorophyll pigments. Given that chlorophyll has been used as an indicator of eutrophication, the yield is of utmost importance. Furthermore, the yield is a key parameter in models that aims at predicting eutrophication.Estimates of the MPB yield have been previously obtained from a series of microcosm experiments. However, discrepant results in nitrogen fluxes suggested the importance of other processes such as denitrification. Therefore, denitrification rates were used for the calculation of nutrient fluxes and new yield estimates were obtained for muddy sediments. Whereas the earlier estimate obtained was of 4.1 mu g chl. (mu mol N)(-1), after including the denitrification rate in the calculation this value was reduced from 5 to 35%. (C) 2011 Elsevier Ltd. All rights reserved.

    U2 - 10.1016/j.ecolind.2011.07.026

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