eprintid: 10115153 rev_number: 13 eprint_status: archive userid: 608 dir: disk0/10/11/51/53 datestamp: 2020-11-16 14:46:43 lastmod: 2020-11-16 14:46:43 status_changed: 2020-11-16 14:46:43 type: report metadata_visibility: show creators_name: Sayer, CD creators_name: Boyle, J creators_name: Emson, D creators_name: Goldsmith, BJ creators_name: Patmore, IR creators_name: Shilland, J creators_name: Yang, H title: Recent heavy metal contamination of the Thurne Broads ispublished: pub divisions: UCL divisions: A01 divisions: B03 divisions: C03 divisions: F26 abstract: The banning of tributyltin (TBT) from boat antifouling paints in the late 1980s led to its replacement by alternative biocide additives (Voulvoulis et al., 2000; Marcheselli et al., 2010), including Cu (Dahl & Blanck, 1996) and Zn as active ingredients. It has been reported that Cu and Zn compounds associated with these biocides have caused substantial contamination of harbour and marina sediments (Eklund et al., 2010; Parks et al., 2010), with negative toxic consequences for aquatic organisms (Ytreberg et al., 2010). Indeed, it is evident that Cu and Zn compounds present in paint fragments are readily leached into the water column allowing entry into aquatic food webs (Jessop & Turner, 2011). Nevertheless, relatively little is known regarding antifoulant-derived metals contamination in freshwater lakes. The Norfolk and Suffolk Broads (Eastern England, UK) have been contaminated by antifoulant-derived heavy metals, particularly Cu and Zn which have increased since the banning of TBT (post-1987) in parts of the boated system (Boyle et al., in prep.). Further, recent studies suggest that current levels of sediment contamination by Cu may have negative ecological effects for aquatic ecosystems including inhibition of aquatic macrophyte germination and performance (Boyle et al., submitted; S. Lambert, unpublished data). In Hickling Broad (Thurne Broads system), post-TBT increases in Cu and Zn are also evident, with an interesting peak in Cu for the late 1990s in core HICK1 (Figure 1). This coincides with the large-scale loss of aquatic macrophytes (especially Characeae) from the lake in 1999 (Barker et al., 2008). HICK1 was collected in 2003. In the proposed study we sought to gain a fuller understanding of recent metal contamination in Hickling Broad up to the present day, whilst looking to verify and better contextualise the late 1990s Cu peak. Further, we aimed to determine whether the peak in Cu for Hickling Broad was also recorded at Horsey Mere which is used as a control site in this study i.e. is it just a Hickling phenomenon? Or is it a Thurne Broads system-wide effect? date: 2015-09 date_type: published publisher: UCL Environmental Change Research Centre official_url: https://www.geog.ucl.ac.uk/research/research-centres/environmental-change-research-centre oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1066008 lyricists_name: Sayer, Carl lyricists_id: CSAYE52 actors_name: Kalinowski, Damian actors_id: DKALI47 actors_role: owner full_text_status: public series: ECRC Research Report number: 165 place_of_pub: London, UK issn: 1366-7300 book_title: ECRC Research Report citation: Sayer, CD; Boyle, J; Emson, D; Goldsmith, BJ; Patmore, IR; Shilland, J; Yang, H; (2015) Recent heavy metal contamination of the Thurne Broads. (ECRC Research Report 165 ). UCL Environmental Change Research Centre: London, UK. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10115153/1/ecrc_report_165_Sayer_Thurne.pdf