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Mire-development pathways and palaeoclimatic records from a full Holocene peat archive at Walton Moss, Cumbria, England

Mire-development pathways and palaeoclimatic records from a full Holocene peat archive at Walton Moss, Cumbria, England
Mire-development pathways and palaeoclimatic records from a full Holocene peat archive at Walton Moss, Cumbria, England
Plant macrofossil data have been used to identify the successive mire communities occupying both central and marginal locations in the Walton Moss peatland complex, during the last 10 500 years. The reconstructed pathways of mire development indicate that early-Holocene fen and fen-carr communities were succeeded by species indicative of deep mire water tables and oligotrophic conditions. The character of the fen/bog transition (FBT) is compared with similar records of peatland development from Britain and Scandinavia and with independent climate data for the early Holocene. The ‘pseudohochmoor’ of central Europe is suggested as an approximate modern analogue for the dry pioneer oligotrophic mire type and alternative explanations for its presence are explored. The first major increase in ombrotrophic Sphagna occurred at c. 7800 cal. BP. Overlying Sphagnum peats provide a continuous record of climate change, inferred from fluctuations in raised mire surface wetness. The proxy palaeoclimate record, reconstructed using Detrended Correspondence Analysis, registers wet shifts commencing at c. 7800, c. 5300, 4410–3990 (2s range), c. 3500, 3170–2860 (2s range), 2320–2040 (2s range), c. 1750, c. 1450, c. 300 and c. 100 cal. BP. This climate record is compared with a similar one from Bolton Fell Moss and spectral analysis of the time-series gives periodicities of c. 1100 years and c. 600 years between wet shifts.
mire development, holcene, paleoclimate, macrosfossils, peat stratigraphy, spectral analysis
0959-6836
465-479
Hughes, P.D.M.
14f83168-b203-4a91-a850-8c48535dc31b
Barber, K.E.
83d1acae-326d-4cb5-94b6-3d1dc78d64e9
Langdon, P.G.
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Mauquoy, D.
33babf9e-3180-4580-b934-68cf4a4b0109
Hughes, P.D.M.
14f83168-b203-4a91-a850-8c48535dc31b
Barber, K.E.
83d1acae-326d-4cb5-94b6-3d1dc78d64e9
Langdon, P.G.
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Mauquoy, D.
33babf9e-3180-4580-b934-68cf4a4b0109

Hughes, P.D.M., Barber, K.E., Langdon, P.G. and Mauquoy, D. (2000) Mire-development pathways and palaeoclimatic records from a full Holocene peat archive at Walton Moss, Cumbria, England. The Holocene, 10 (4), 465-479. (doi:10.1191/095968300675142023).

Record type: Article

Abstract

Plant macrofossil data have been used to identify the successive mire communities occupying both central and marginal locations in the Walton Moss peatland complex, during the last 10 500 years. The reconstructed pathways of mire development indicate that early-Holocene fen and fen-carr communities were succeeded by species indicative of deep mire water tables and oligotrophic conditions. The character of the fen/bog transition (FBT) is compared with similar records of peatland development from Britain and Scandinavia and with independent climate data for the early Holocene. The ‘pseudohochmoor’ of central Europe is suggested as an approximate modern analogue for the dry pioneer oligotrophic mire type and alternative explanations for its presence are explored. The first major increase in ombrotrophic Sphagna occurred at c. 7800 cal. BP. Overlying Sphagnum peats provide a continuous record of climate change, inferred from fluctuations in raised mire surface wetness. The proxy palaeoclimate record, reconstructed using Detrended Correspondence Analysis, registers wet shifts commencing at c. 7800, c. 5300, 4410–3990 (2s range), c. 3500, 3170–2860 (2s range), 2320–2040 (2s range), c. 1750, c. 1450, c. 300 and c. 100 cal. BP. This climate record is compared with a similar one from Bolton Fell Moss and spectral analysis of the time-series gives periodicities of c. 1100 years and c. 600 years between wet shifts.

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More information

Accepted/In Press date: 27 September 1999
Published date: May 2000
Keywords: mire development, holcene, paleoclimate, macrosfossils, peat stratigraphy, spectral analysis
Organisations: Geography & Environment

Identifiers

Local EPrints ID: 389428
URI: https://eprints.soton.ac.uk/id/eprint/389428
ISSN: 0959-6836
PURE UUID: 0bf2a6d7-8cf3-4428-b3e7-753fbe50f5ad
ORCID for P.G. Langdon: ORCID iD orcid.org/0000-0003-2724-2643

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Date deposited: 07 Mar 2016 14:14
Last modified: 26 Nov 2019 01:57

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Contributors

Author: P.D.M. Hughes
Author: K.E. Barber
Author: P.G. Langdon ORCID iD
Author: D. Mauquoy

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