57bd0c71-5de7-254a-e063-3050940a2182 English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-08-24 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608752 Multi-proxy sediment core record from Lagoon 3, Rutland Water Nature Reserve, UK, 1976-2023: nutrient fractions, stable isotopes, photosynthetic pigments and microcystins 2026-07-27 creation http://data.bgs.ac.uk/id/dataHolding/13608752 This dataset comprises an annually interpolated, multi-proxy geochemical and biological record from a sediment core sequence collected from Lagoon 3 (LG3), Rutland Water Nature Reserve, Rutland, UK, spanning 1976 to 2023 CE. LG3 is a shallow (3-4 m) constructed lagoon that has received water exclusively from the final treated effluent of Oakham Water Recycling Centre since 1979, with no other surface inflows or storm overflow inputs. The site therefore constitutes a controlled natural experiment for attributing sedimentary and ecological change to documented changes in wastewater tertiary treatment, specifically the operation of a Natural Filtration System (1991-2015) and the introduction of Chemical Phosphorus Removal (ferric sulphate dosing) in 2001. Stable isotope ratios are given in conventional delta notation, in units of per mil (parts per thousand). The dataset contains 28 variables: bulk organic carbon and nitrogen concentrations (C %, N %) and C/N ratio; bulk stable isotope ratios (δ15N per mil vs AIR, δ13C per mil vs VPDB); four sequentially extracted sedimentary phosphorus fractions (labile-P, microbial-P, NaOH-P, HCl-P; micrograms P per gram dry sediment) and their sum as total P; phosphate oxygen isotope ratios measured on the HCl-extractable (Ca-bound) phosphorus fraction (δ18O-PO4, per mil vs VSMOW); fifteen sedimentary photosynthetic pigments quantified by HPLC (including chlorophyll-a and -b, phaeophorbide-a, phaeophytin-a and -b, canthaxanthin, myxoxanthophyll, lutein and zeaxanthin (co-eluted), fucoxanthin, diatoxanthin, diadinoxanthin, violaxanthin, alloxanthin and crocoxanthin), expressed as nmol per microgram organic matter; and sedimentary microcystin-LR flux (ng per square centimetre per year). Savannah Worne University of Loughborough not available originator T Sexton Leicestershire and Rutland Wildlife Trust not available originator A D Turner Centre for Environment, Fisheries and Aquaculture Science not available originator D Hartnell Centre for Environment, Fisheries and Aquaculture Science not available originator V N Panizzo University of Nottingham not available originator T Stanton University of Loughborough not available originator Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk distributor Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/57bd0c71-5de7-254a-e063-3050940a2182.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Stable isotopes Core sampling Lacustrine sediments Isotopes Phosphorus Waste water Eutrophication BGS Thesaurus of Geosciences 2022 revision Citable Data NGDC Deposited Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation 2023-04-01 2024-09-30 Comma-Separated Values (CSV) file (.csv) Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk distributor Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192885 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/4e11cb0e-7aee-49b2-a5bc-bc292db27d89 WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Worne, S., Smith, A. C., Sexton, T., Panizzo, V. N., Lacey, J. H., Turner, A. D., Hartnell, D., Stanton, T., Marriot, A. (2026). Multi-proxy sediment core record from Lagoon 3ater Nature Reserve, UK, 1976-2023: nutrient fractions, stable isotopes, photosynthetic pigments and microcystins. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/4e11cb0e-7aee-49b2-a5bc-bc292db27d89 information nonGeographicDataset non geographic dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false Two gravity cores (LG3-A, 44 cm; LG3-C, 40 cm) were collected at 3.6 m water depth in August 2023 using a UWITEC corer and extruded at 1 cm intervals. Chronology was established by Pb-210 gamma spectrometry on LG3-C, with the core base constrained to 1976; LG3-A was correlated to LG3-C using eight d13C tie-points. Mean accumulation rates were 1.04 and 0.96 cm per year (age model error 1.1 +/- 0.6 years), and both records were unified by linear interpolation at annual resolution. C, N, δ13C and δ15N were determined by EA-IRMS (δ13C on acid-treated subsamples). Four P pools were sequentially extracted and quantified by molybdenum blue UV-VIS spectrophotometry. HCl-P was purified to Ag3PO4 and analysed for δ18O-PO4 by pyrolysis-IRMS. Pigments were solvent-extracted and separated by HPLC against DHI standards. Microcystins were extracted in 80% methanol and quantified by UHPLC-MS/MS.