Sequential inorganic chemical analysis of a core from Slapton Ley, Devon, UK

Lancaster Environment Centre

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https://doi.org/10.1007/BF00050941
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Keywords

Paleolimnology , sediment chemistry , sequential analysis , 210Pb dating , eutrophication , lake level changes

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Sequential inorganic chemical analysis of a core from Slapton Ley, Devon, UK. / Heathwaite, A.Louise; O'Sullivan, P E.
In: Hydrobiologia, Vol. 214, No. 1, 1991, p. 125-135.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{f5bdb2b02bee4ccebee4735829c7e14b,

title = "Sequential inorganic chemical analysis of a core from Slapton Ley, Devon, UK",

abstract = "Analysis of the upper 40 cm of a sediment core from Slapton Ley, a coastal lake in SW England was based on the fractionation procedure devised by Engstrom (Engstrom & Wright, 1984). This allows separation of the sediment into authigenic, biogenic and allogenic components. Lead-210 dating of the same core enabled trends in both concentration (mg g–1 dry mass) and influx (mg cm–2 a–1) to be evaluated, and to be compared with events over the past two hundred years in the Ley and its catchment. The results show that before ca. 1950 AD, Slapton Ley was a shallow, clear, eutrophic lake, into which, in the mid-C19th, calcareous material was introduced by a phase of lime-kiln operation, road construction and lake level control. Since 1950, erosion of detrital material from the catchment has increased, as has the input of both allogenic and authigenic phosphorus, and biogenic silica. These changes reflect the intensification of agriculture post-1945, and the construction of Slapton sewage treatment works in 1953. A major peak in authigenic nitrogen, 6 cm below the present sediment surface, is correlated with the severe 1976 drought in the UK. The ecosystem of the Ley appears to have been triggered by this event into its present hypertrophic state.",

keywords = "Paleolimnology , sediment chemistry , sequential analysis , 210Pb dating , eutrophication , lake level changes",

author = "A.Louise Heathwaite and O'Sullivan, {P E}",

note = "Sequential inorganic chemical analysis of a core from Slapton Ley, Devon, UK 8 cites: http://scholar.google.com/scholar?num=100&hl=en&lr=&cites=14293156621485342189",

year = "1991",

doi = "10.1007/BF00050941",

language = "English",

volume = "214",

pages = "125--135",

journal = "Hydrobiologia",

publisher = "Springer",

number = "1",

}

RIS

TY - JOUR

T1 - Sequential inorganic chemical analysis of a core from Slapton Ley, Devon, UK

AU - Heathwaite, A.Louise

AU - O'Sullivan, P E

N1 - Sequential inorganic chemical analysis of a core from Slapton Ley, Devon, UK 8 cites: http://scholar.google.com/scholar?num=100&hl=en&lr=&cites=14293156621485342189

PY - 1991

Y1 - 1991

N2 - Analysis of the upper 40 cm of a sediment core from Slapton Ley, a coastal lake in SW England was based on the fractionation procedure devised by Engstrom (Engstrom & Wright, 1984). This allows separation of the sediment into authigenic, biogenic and allogenic components. Lead-210 dating of the same core enabled trends in both concentration (mg g–1 dry mass) and influx (mg cm–2 a–1) to be evaluated, and to be compared with events over the past two hundred years in the Ley and its catchment. The results show that before ca. 1950 AD, Slapton Ley was a shallow, clear, eutrophic lake, into which, in the mid-C19th, calcareous material was introduced by a phase of lime-kiln operation, road construction and lake level control. Since 1950, erosion of detrital material from the catchment has increased, as has the input of both allogenic and authigenic phosphorus, and biogenic silica. These changes reflect the intensification of agriculture post-1945, and the construction of Slapton sewage treatment works in 1953. A major peak in authigenic nitrogen, 6 cm below the present sediment surface, is correlated with the severe 1976 drought in the UK. The ecosystem of the Ley appears to have been triggered by this event into its present hypertrophic state.

AB - Analysis of the upper 40 cm of a sediment core from Slapton Ley, a coastal lake in SW England was based on the fractionation procedure devised by Engstrom (Engstrom & Wright, 1984). This allows separation of the sediment into authigenic, biogenic and allogenic components. Lead-210 dating of the same core enabled trends in both concentration (mg g–1 dry mass) and influx (mg cm–2 a–1) to be evaluated, and to be compared with events over the past two hundred years in the Ley and its catchment. The results show that before ca. 1950 AD, Slapton Ley was a shallow, clear, eutrophic lake, into which, in the mid-C19th, calcareous material was introduced by a phase of lime-kiln operation, road construction and lake level control. Since 1950, erosion of detrital material from the catchment has increased, as has the input of both allogenic and authigenic phosphorus, and biogenic silica. These changes reflect the intensification of agriculture post-1945, and the construction of Slapton sewage treatment works in 1953. A major peak in authigenic nitrogen, 6 cm below the present sediment surface, is correlated with the severe 1976 drought in the UK. The ecosystem of the Ley appears to have been triggered by this event into its present hypertrophic state.

KW - Paleolimnology

KW - sediment chemistry

KW - sequential analysis

KW - 210Pb dating

KW - eutrophication

KW - lake level changes

U2 - 10.1007/BF00050941

DO - 10.1007/BF00050941

M3 - Journal article

VL - 214

SP - 125

EP - 135

JO - Hydrobiologia

JF - Hydrobiologia

IS - 1

ER -

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