Human-caused increases in reactive nitrogen burial in sediment of global lakes

Summary: Human activities have increased reactive nitrogen (Nr) input to terrestrial ecosystems compared with the pre-industrial era. However, the fate of such Nr input remains uncertain, leading to missing sink of the global nitrogen budget. By synthesizing records of Nr burial in sediments from 30...

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Autores principales:	Mei Wang, Benjamin Z. Houlton, Sitong Wang, Chenchen Ren, Hans J.M. van Grinsven, Deli Chen, Jianming Xu, Baojing Gu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	biogeochemistry nitrogen accumulation sink eutrophication carbon Science (General) Q1-390
Acceso en línea:	https://doaj.org/article/266e21c67ddf424db16a543b30e26492
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spelling	oai:doaj.org-article:266e21c67ddf424db16a543b30e264922021-11-28T04:38:58ZHuman-caused increases in reactive nitrogen burial in sediment of global lakes2666-675810.1016/j.xinn.2021.100158https://doaj.org/article/266e21c67ddf424db16a543b30e264922021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666675821000837https://doaj.org/toc/2666-6758Summary: Human activities have increased reactive nitrogen (Nr) input to terrestrial ecosystems compared with the pre-industrial era. However, the fate of such Nr input remains uncertain, leading to missing sink of the global nitrogen budget. By synthesizing records of Nr burial in sediments from 303 lakes worldwide, here we show that 9.6 ± 1.1 Tg N year−1 (Tg = 1012 g) accumulated in inland water sediments from 2000 to 2010, accounting for 3%–5% of global Nr input to the land from combined natural and anthropogenic pathways. The recent Nr burial flux doubles pre-industrial estimates, and Nr burial rate significantly increases with global increases in human population and air temperature. Sediment ratios of C:N decrease after 1950 while N:P ratios increase over time due to increasingly elevated Nr burial and other related processes in lakes. These findings imply that Nr burial in lakes is overlooked as an important global sink of Nr input to terrestrial ecosystems. Public summary: • Ten million tons of nitrogen was buried in lake sediment annually during 2000–2010 • Lake nitrogen burial rate is increasing since the 1860s • Nitrogen burial is highly correlated with carbon burial rate in lakes • Nitrogen burial in lakes can explain part of the global missing nitrogen sinkMei WangBenjamin Z. HoultonSitong WangChenchen RenHans J.M. van GrinsvenDeli ChenJianming XuBaojing GuElsevierarticlebiogeochemistrynitrogen accumulationsinkeutrophicationcarbonScience (General)Q1-390ENThe Innovation, Vol 2, Iss 4, Pp 100158- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biogeochemistry nitrogen accumulation sink eutrophication carbon Science (General) Q1-390
spellingShingle	biogeochemistry nitrogen accumulation sink eutrophication carbon Science (General) Q1-390 Mei Wang Benjamin Z. Houlton Sitong Wang Chenchen Ren Hans J.M. van Grinsven Deli Chen Jianming Xu Baojing Gu Human-caused increases in reactive nitrogen burial in sediment of global lakes
description	Summary: Human activities have increased reactive nitrogen (Nr) input to terrestrial ecosystems compared with the pre-industrial era. However, the fate of such Nr input remains uncertain, leading to missing sink of the global nitrogen budget. By synthesizing records of Nr burial in sediments from 303 lakes worldwide, here we show that 9.6 ± 1.1 Tg N year−1 (Tg = 1012 g) accumulated in inland water sediments from 2000 to 2010, accounting for 3%–5% of global Nr input to the land from combined natural and anthropogenic pathways. The recent Nr burial flux doubles pre-industrial estimates, and Nr burial rate significantly increases with global increases in human population and air temperature. Sediment ratios of C:N decrease after 1950 while N:P ratios increase over time due to increasingly elevated Nr burial and other related processes in lakes. These findings imply that Nr burial in lakes is overlooked as an important global sink of Nr input to terrestrial ecosystems. Public summary: • Ten million tons of nitrogen was buried in lake sediment annually during 2000–2010 • Lake nitrogen burial rate is increasing since the 1860s • Nitrogen burial is highly correlated with carbon burial rate in lakes • Nitrogen burial in lakes can explain part of the global missing nitrogen sink
format	article
author	Mei Wang Benjamin Z. Houlton Sitong Wang Chenchen Ren Hans J.M. van Grinsven Deli Chen Jianming Xu Baojing Gu
author_facet	Mei Wang Benjamin Z. Houlton Sitong Wang Chenchen Ren Hans J.M. van Grinsven Deli Chen Jianming Xu Baojing Gu
author_sort	Mei Wang
title	Human-caused increases in reactive nitrogen burial in sediment of global lakes
title_short	Human-caused increases in reactive nitrogen burial in sediment of global lakes
title_full	Human-caused increases in reactive nitrogen burial in sediment of global lakes
title_fullStr	Human-caused increases in reactive nitrogen burial in sediment of global lakes
title_full_unstemmed	Human-caused increases in reactive nitrogen burial in sediment of global lakes
title_sort	human-caused increases in reactive nitrogen burial in sediment of global lakes
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/266e21c67ddf424db16a543b30e26492
work_keys_str_mv	AT meiwang humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT benjaminzhoulton humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT sitongwang humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT chenchenren humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT hansjmvangrinsven humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT delichen humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT jianmingxu humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes AT baojinggu humancausedincreasesinreactivenitrogenburialinsedimentofgloballakes
_version_	1718408248057397248

Human-caused increases in reactive nitrogen burial in sediment of global lakes

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