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Title: Lake eutrophication and its implications for organic carbon sequestration in Europe
Authors: Anderson, Nicholas John
Bennion, Helen
Lotter, André F.
Keywords: Agriculture
Fertilizer
Lake carbon burial
Lake eutrophication
Organic carbon burial
Land use
Nitrogen
Phosphorus
Issue Date: 2014
Publisher: © John Wiley & Sons
Citation: ANDERSON, N., BENNION, H. and LOTTER, A., 2014. Lake eutrophication and its implications for organic carbon sequestration in Europe. Global Change Biology, 20 (9), pp.2741-2751.
Abstract: The eutrophication of lowland lakes in Europe by excess nitrogen (N) and phosphorus (P) is severe because of the long history of land-cover change and agricultural intensification. The ecological and socio-economic effects of eutrophication are well understood but its effect on organic carbon (OC) sequestration by lakes and its change overtime has not been determined. Here, we compile data from ~90 culturally impacted European lakes [~60% are eutrophic, Total P (TP) >30 μg P l-1] and determine the extent to which OC burial rates have increased over the past 100-150 years. The average focussing corrected, OC accumulation rate (C ARFC) for the period 1950-1990 was ~60 g C m-2 yr-1, and for lakes with >100 μg TP l-1 the average was ~100 g C m-2 yr-1. The ratio of post-1950 to 1900-1950 C AR is low (~1.5) indicating that C accumulation rates have been high throughout the 20th century. Compared to background estimates of OC burial (~5-10 g C m-2 yr-1), contemporary rates have increased by at least four to fivefold. The statistical relationship between C ARFC and TP derived from this study (r2 = 0.5) can be used to estimate OC burial at sites lacking estimates of sediment C-burial. The implications of eutrophication, diagenesis, lake morphometry and sediment focussing as controls of OC burial rates are considered. A conservative interpretation of the results of the this study suggests that lowland European meso- to eutrophic lakes with >30 μg TP l-1 had OC burial rates in excess of 50 g C m-2 yr-1 over the past century, indicating that previous estimates of regional lake OC burial have seriously underestimated their contribution to European carbon sequestration. Enhanced OC burial by lakes is one positive side-effect of the otherwise negative impact of the anthropogenic disruption of nutrient cycles.
Description: This is the peer reviewed version of the following article: ANDERSON, N., BENNION, H. and LOTTER, A., 2014. Lake eutrophication and its implications for organic carbon sequestration in Europe. Global Change Biology, 20 (9), pp.2741-2751, which has been published in final form at: http://dx.doi.org/10.1111/gcb.12584. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Version: Accepted for publication
DOI: 10.1111/gcb.12584
URI: https://dspace.lboro.ac.uk/2134/24111
Publisher Link: http://dx.doi.org/10.1111/gcb.12584
ISSN: 1354-1013
Appears in Collections:Published Articles (Geography)

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