A temporal record of microplastic accumulation in sediment cores of the Great Lakes, North America, reflects macroeconomic and regional influences

被引：1

作者：

Belontz, Sara L. ^{[1
]}

Corcoran, Patricia L. ^{[1
]}

Kimpe, Linda ^{[2
]}

Helm, Paul A. ^{[3
]}

Marvin, Chris ^{[4
]}

机构：

[1] Univ Western Ontario, Dept Earth Sci, London, ON, Canada

[2] Univ Ottawa, Dept Biol, Gendron Hall,30 Marie Curie, Ottawa, ON K1N 6N5, Canada

[3] Ontario Minist Environm Conservat & Pk, Great Lakes, Toronto, ON, Canada

[4] Environm & Climate Change Canada, Downsview, ON, Canada

来源：

FACETS | 2024年 / 9卷

关键词：

microplastics; sediment cores; Laurentian Great Lakes; macroeconomics; oil; anthropogenic; PLASTIC DEBRIS; ONTARIO; TRANSPORT; TRIBUTARY; NEARSHORE; CANADA; MARINE;

D O I：

10.1139/facets-2023-0057

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Documented plastic pollution throughout the Laurentian Great Lakes system prompted investigation of microplastics (MPs) in sediment cores. We examined offshore sediment cores from Lake Huron (LH43) and Lake Ontario (403A) to understand temporal trends and changes in microplastic (MP) pollution in the size range 53 mu m to 2 mm. MP abundances varied from 18.1 to 280.1 particles per g of dry weight sediment (N g(-1) dw) in LH43, and 8.2-488.4 g(-1) dw in core 403A. The 15 cm cores are equivalent to 56 years of accumulation in Lake Huron and 72 years of accumulation in Lake Ontario. Analysis of the two cores shows an increasing trend in MP accumulation from 1964 to 1989, which mirrors the global plastic production rate. Subsequent peaks and troughs in the MP abundance profiles reflect macroeconomic changes and regional controls. These results show how changing abundances of MPs in lake sediment cores can act as proxies for global perturbations in oil supply as well as national economic shifts.

引用

页码：1 / 10

页数：10

共 17 条

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