标本馆中的氮同位素记录了英国默西河口历史上的氮污水污染情况

IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL
Freya C. Alldred, Darren R. Gröcke, Samuel E. Jackson and Geraldine Reid
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引用次数: 0

摘要

制作了 1821 年至 2018 年期间默西河和利物浦南码头(英格兰)的大型藻类(海藻)标本室氮同位素(δ15N)记录。此外,还制作了自 2022 年 9 月起的现代大型藻类 δ15N 记录。标本δ15N记录显示出 1821 年至今的巨大差异。19 世纪早期较低的δ15N 可归因于农业和原始污水污染。1970 年至今,标本馆样本记录的 δ15N 值非常高,1978 年达到顶峰,为 +31‰。1989 年的《水法》和英国自来水公司的私有化对标本室的 δ15N 记录影响有限,但表明默西河中污水氮占主导地位。自 2013 年最后一次标本馆采样以来,大型藻类的 δ15N 甚至变得更高。标本馆和现代数据记录了迄今为止最高的一些海藻δ15N 值(因此也是污水氮污染)。这项研究强调了利用标本馆大型藻类记录河口环境氮污染过去变化的新方法。更重要的是,它强调了默西河-默西河口受到污水氮的严重污染,需要立即采取行动解决这一环境问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Nitrogen isotopes in herbaria document historical nitrogen sewage pollution in the Mersey Estuary, England†

Nitrogen isotopes in herbaria document historical nitrogen sewage pollution in the Mersey Estuary, England†

Nitrogen isotopes in herbaria document historical nitrogen sewage pollution in the Mersey Estuary, England†

A macroalgae (seaweed) herbarium nitrogen isotope (δ15N) record is produced for the River Mersey and Liverpool South Docks (England) between 1821 and 2018. A modern macroalgae δ15N record was also produced from September 2022. The herbaria δ15N record shows a stark difference from 1821 to the present. Lower δ15N in the early 1800s is attributed to agricultural and raw sewage pollution. From 1970 to the present the herbaria samples record very elevated δ15N values – peaking in 1978 at +31‰. The 1989 Water Act and privatisation of water companies in the UK had limited impact on the herbarium δ15N record but indicated a dominance of sewage nitrogen in the River Mersey. Macroalgae δ15N has become even more elevated since the last herbaria sample in 2013. The herbaria and modern data record some of the highest seaweed δ15N values (and therefore, sewage nitrogen pollution) recorded to date. This study highlights a novel use of herbaria macroalgae to document past changes in nitrogen pollution in estuarine environments. More poignantly it highlights that the River Mersey – Mersey Estuary is heavily polluted with sewage nitrogen and requires immediate action to resolve this environmental issue.

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