Assessment of terrigenous organic carbon input to the total organic carbon in sediments from Scottish coastal waters (sea lochs) I: methodology and preliminary results

P. S. Loh, A. D. Reeves, J. Overnell, S. M. Harvey, A. E. J. Miller

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    NOTE: THE SYMBOLS/SPECIAL CHARACTERS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT ON THE PUBLISHER’S WEBSITE FOR AN ACCURATE DISPLAY. This paper addresses the assessment of terrestrially derived organic carbon in sediments from two Scottish sea lochs. The results illustrate a smooth decrease in area-specific sediment oxygen uptake rates along a transect of six stations from the head of Loch Creran to the sea, from 18.7 mmol O2m-2d-1 to 6.6 mmol O2m-2d-1. Measurement of the losses on ignition at two temperatures (250°C and 500°C) of the sediment fraction from 1–2 cm depth at the same stations enabled the proportion of weight loss that occurred over the high temperature range to be calculated. These show a smooth increase from 0.33 to 0.62. These observations indicate that (a) the amount of easily biodegradable organic material in the sediment decreases by two-thirds along the transect and (b) the proportion of refractory organic material in the sediment increases along the same transect. This suggests strongly that terrigenous organic material, brought down by the River Creran is a very important fuel for sediment diagenetic processes in this system. Preliminary analyses of the lignin composition of the same sediments indicate the predominance of non-woody gymnosperm tissue. Lignin is used as a proxy for terrigenous allochthonous material. Comparative data for Loch Etive are also presented.
    Original languageEnglish
    Pages (from-to)959-970
    Number of pages12
    JournalHydrology and Earth System Sciences
    Volume6
    Issue number6
    DOIs
    Publication statusPublished - Nov 2002

    Fingerprint

    total organic carbon
    coastal water
    organic carbon
    methodology
    sediment
    transect
    lignin
    gymnosperm
    sea
    oxygen
    material
    river
    temperature

    Keywords

    • Sedimentary organic carbon
    • Loch Creran
    • Loch Etive
    • Oxygen uptake
    • Lignin analysis

    Cite this

    @article{8de5b463eda045c99689779089b818d9,
    title = "Assessment of terrigenous organic carbon input to the total organic carbon in sediments from Scottish coastal waters (sea lochs) I: methodology and preliminary results",
    abstract = "NOTE: THE SYMBOLS/SPECIAL CHARACTERS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT ON THE PUBLISHER’S WEBSITE FOR AN ACCURATE DISPLAY. This paper addresses the assessment of terrestrially derived organic carbon in sediments from two Scottish sea lochs. The results illustrate a smooth decrease in area-specific sediment oxygen uptake rates along a transect of six stations from the head of Loch Creran to the sea, from 18.7 mmol O2m-2d-1 to 6.6 mmol O2m-2d-1. Measurement of the losses on ignition at two temperatures (250°C and 500°C) of the sediment fraction from 1–2 cm depth at the same stations enabled the proportion of weight loss that occurred over the high temperature range to be calculated. These show a smooth increase from 0.33 to 0.62. These observations indicate that (a) the amount of easily biodegradable organic material in the sediment decreases by two-thirds along the transect and (b) the proportion of refractory organic material in the sediment increases along the same transect. This suggests strongly that terrigenous organic material, brought down by the River Creran is a very important fuel for sediment diagenetic processes in this system. Preliminary analyses of the lignin composition of the same sediments indicate the predominance of non-woody gymnosperm tissue. Lignin is used as a proxy for terrigenous allochthonous material. Comparative data for Loch Etive are also presented.",
    keywords = "Sedimentary organic carbon, Loch Creran, Loch Etive, Oxygen uptake, Lignin analysis",
    author = "Loh, {P. S.} and Reeves, {A. D.} and J. Overnell and Harvey, {S. M.} and Miller, {A. E. J.}",
    note = "dc.publisher: European Geosciences Union",
    year = "2002",
    month = "11",
    doi = "10.5194/hess-6-959-2002",
    language = "English",
    volume = "6",
    pages = "959--970",
    journal = "Hydrology and Earth System Sciences",
    issn = "1027-5606",
    publisher = "European Geosciences Union",
    number = "6",

    }

    Assessment of terrigenous organic carbon input to the total organic carbon in sediments from Scottish coastal waters (sea lochs) I: methodology and preliminary results. / Loh, P. S.; Reeves, A. D.; Overnell, J.; Harvey, S. M.; Miller, A. E. J.

    In: Hydrology and Earth System Sciences, Vol. 6, No. 6, 11.2002, p. 959-970.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Assessment of terrigenous organic carbon input to the total organic carbon in sediments from Scottish coastal waters (sea lochs) I: methodology and preliminary results

    AU - Loh, P. S.

    AU - Reeves, A. D.

    AU - Overnell, J.

    AU - Harvey, S. M.

    AU - Miller, A. E. J.

    N1 - dc.publisher: European Geosciences Union

    PY - 2002/11

    Y1 - 2002/11

    N2 - NOTE: THE SYMBOLS/SPECIAL CHARACTERS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT ON THE PUBLISHER’S WEBSITE FOR AN ACCURATE DISPLAY. This paper addresses the assessment of terrestrially derived organic carbon in sediments from two Scottish sea lochs. The results illustrate a smooth decrease in area-specific sediment oxygen uptake rates along a transect of six stations from the head of Loch Creran to the sea, from 18.7 mmol O2m-2d-1 to 6.6 mmol O2m-2d-1. Measurement of the losses on ignition at two temperatures (250°C and 500°C) of the sediment fraction from 1–2 cm depth at the same stations enabled the proportion of weight loss that occurred over the high temperature range to be calculated. These show a smooth increase from 0.33 to 0.62. These observations indicate that (a) the amount of easily biodegradable organic material in the sediment decreases by two-thirds along the transect and (b) the proportion of refractory organic material in the sediment increases along the same transect. This suggests strongly that terrigenous organic material, brought down by the River Creran is a very important fuel for sediment diagenetic processes in this system. Preliminary analyses of the lignin composition of the same sediments indicate the predominance of non-woody gymnosperm tissue. Lignin is used as a proxy for terrigenous allochthonous material. Comparative data for Loch Etive are also presented.

    AB - NOTE: THE SYMBOLS/SPECIAL CHARACTERS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT ON THE PUBLISHER’S WEBSITE FOR AN ACCURATE DISPLAY. This paper addresses the assessment of terrestrially derived organic carbon in sediments from two Scottish sea lochs. The results illustrate a smooth decrease in area-specific sediment oxygen uptake rates along a transect of six stations from the head of Loch Creran to the sea, from 18.7 mmol O2m-2d-1 to 6.6 mmol O2m-2d-1. Measurement of the losses on ignition at two temperatures (250°C and 500°C) of the sediment fraction from 1–2 cm depth at the same stations enabled the proportion of weight loss that occurred over the high temperature range to be calculated. These show a smooth increase from 0.33 to 0.62. These observations indicate that (a) the amount of easily biodegradable organic material in the sediment decreases by two-thirds along the transect and (b) the proportion of refractory organic material in the sediment increases along the same transect. This suggests strongly that terrigenous organic material, brought down by the River Creran is a very important fuel for sediment diagenetic processes in this system. Preliminary analyses of the lignin composition of the same sediments indicate the predominance of non-woody gymnosperm tissue. Lignin is used as a proxy for terrigenous allochthonous material. Comparative data for Loch Etive are also presented.

    KW - Sedimentary organic carbon

    KW - Loch Creran

    KW - Loch Etive

    KW - Oxygen uptake

    KW - Lignin analysis

    U2 - 10.5194/hess-6-959-2002

    DO - 10.5194/hess-6-959-2002

    M3 - Article

    VL - 6

    SP - 959

    EP - 970

    JO - Hydrology and Earth System Sciences

    JF - Hydrology and Earth System Sciences

    SN - 1027-5606

    IS - 6

    ER -