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Recovery of UK lakes from acidification: an assessment using combined palaeoecological and contemporary diatom assemblage data

Recovery of UK lakes from acidification: an assessment using combined palaeoecological and contemporary diatom assemblage data
Recovery of UK lakes from acidification: an assessment using combined palaeoecological and contemporary diatom assemblage data
We assess the recovery of UK lakes from acidification using the combined data from sediment cores and sediment traps to track changes in diatom assemblages in 11 UK upland lakes from pre-acidification times (prior to ca. 1850 AD) to the present (2008 AD). We projected the data into a Principal Component Analysis (PCA) of diatom assemblage data from 121 low-alkalinity lakes in the UK to show how the floristic composition of the core and trap diatom assemblages for each site has changed through time. The results show that the degree of recovery from acidification varies amongst sites but in all cases its extent is limited when compared with the pre-acidification reference. In most cases the recovery, although usually slight, is characterised by a decline in acid tolerant taxa and a return towards taxa that occurred previously at each respective site. In a few cases, however, the floristic composition of recent samples is different from those that occurred during and before the acidification phase. The reasons for this are not yet clear but it is possible that nutrient enrichment from atmospheric N deposition and/or climate change is beginning to play a role in driving water quality as acidity decreases. More generally the results show that annually recovered samples from sediment traps can be successfully combined with sediment core data to provide a continuous record of environmental change in lake systems, and that diatoms collected in sediment traps can be used to provide a very powerful lake monitoring tool.
acidification, diatoms, palaeoecology, recovery, long-term trends, lake sediments, sediment traps
1470-160X
1-16
Battarbee, Richard
3b122c27-ffb4-46fc-95c7-9c6885e757dd
Simpson, Gavin
bb58e7c2-5dcf-433f-82ab-ce4b38360ad6
Shilland, Ewan
8ee497d8-dae4-447a-9545-d10f5f992e3d
Flower, Roger
84ff829e-69d3-4375-9f97-e34b6ce15dc8
Kreiser, Annette
14e99024-675c-4b11-aa4e-df0ac2f77e35
Yang, Hong
2ea2c94c-8d28-4555-98f9-59b615b0cee7
Clarke, Gina
4230bd7f-1981-49f6-b89a-71b37f47c0ba
Battarbee, Richard
3b122c27-ffb4-46fc-95c7-9c6885e757dd
Simpson, Gavin
bb58e7c2-5dcf-433f-82ab-ce4b38360ad6
Shilland, Ewan
8ee497d8-dae4-447a-9545-d10f5f992e3d
Flower, Roger
84ff829e-69d3-4375-9f97-e34b6ce15dc8
Kreiser, Annette
14e99024-675c-4b11-aa4e-df0ac2f77e35
Yang, Hong
2ea2c94c-8d28-4555-98f9-59b615b0cee7
Clarke, Gina
4230bd7f-1981-49f6-b89a-71b37f47c0ba

Battarbee, Richard, Simpson, Gavin, Shilland, Ewan, Flower, Roger, Kreiser, Annette, Yang, Hong and Clarke, Gina (2012) Recovery of UK lakes from acidification: an assessment using combined palaeoecological and contemporary diatom assemblage data. Ecological Indicators, 1-16. (doi:10.1016/j.ecolind.2012.10.024).

Record type: Article

Abstract

We assess the recovery of UK lakes from acidification using the combined data from sediment cores and sediment traps to track changes in diatom assemblages in 11 UK upland lakes from pre-acidification times (prior to ca. 1850 AD) to the present (2008 AD). We projected the data into a Principal Component Analysis (PCA) of diatom assemblage data from 121 low-alkalinity lakes in the UK to show how the floristic composition of the core and trap diatom assemblages for each site has changed through time. The results show that the degree of recovery from acidification varies amongst sites but in all cases its extent is limited when compared with the pre-acidification reference. In most cases the recovery, although usually slight, is characterised by a decline in acid tolerant taxa and a return towards taxa that occurred previously at each respective site. In a few cases, however, the floristic composition of recent samples is different from those that occurred during and before the acidification phase. The reasons for this are not yet clear but it is possible that nutrient enrichment from atmospheric N deposition and/or climate change is beginning to play a role in driving water quality as acidity decreases. More generally the results show that annually recovered samples from sediment traps can be successfully combined with sediment core data to provide a continuous record of environmental change in lake systems, and that diatoms collected in sediment traps can be used to provide a very powerful lake monitoring tool.

Full text not available from this repository.

More information

Accepted/In Press date: 2012
e-pub ahead of print date: 2012
Keywords: acidification, diatoms, palaeoecology, recovery, long-term trends, lake sediments, sediment traps
Organisations: Geography & Environment

Identifiers

Local EPrints ID: 345622
URI: https://eprints.soton.ac.uk/id/eprint/345622
ISSN: 1470-160X
PURE UUID: fbe34284-7c79-4b75-89d1-2deb5b5bd52f

Catalogue record

Date deposited: 27 Nov 2012 16:32
Last modified: 18 Jul 2017 05:08

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