期刊
MARINE ENVIRONMENTAL RESEARCH
卷 169, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2021.105327
关键词
Polypropylene; Polyethylene; Nylon; Relative microplastics concentration; ZooScan; FTIR
资金
- Brazilian National Research Council (CNPq)
- ESPLAN project (CNPq ) [471038/2012-1]
- INCTAmbTropic (CNPq/CAPES/FAPESB)
- ICMBio Foundation
- SOS Mata Atlantica Foundation
- project TRIATLAS from the European Union [817578]
- MicroplastiX project - JPI Oceans
- Toyota do Brasil Foundation
The study found that microplastics have a significant impact on tropical coastal food webs, especially when food is scarce. Additionally, it was pointed out that nylon fibers have the most significant impact on shelf ecosystems.
Plankton organisms, biogenic particles, inorganic mineral particles, and microplastics are the four main components of particulate organic matter in aquatic ecosystems. We propose a new index, the Relative Microplastics Concentration (RMC, in %), considering that microplastics are more deleterious when food is scarce. A total of 112 plankton net samples were collected in estuarine, coastal and shelf environments of Tamandare ', Brazil. Particles were identified by image analysis (ZooScan) and FTIR. Higher concentrations of total microplastics, PP (Polypropylene) and PE (Polyethylene) in the estuary indicate an oceanward decreasing gradient from terrestrial sources. Higher concentrations of nylon fibres were found offshore. Yet, RMC indicated that the Bay had the most severely impacted ecosystems (RMC: 2.4% in the estuary, 5.1% in the Bay, and 2.0% on the shelf), for total microplastics and PP & PE. Shelf ecosystems were most severely impacted with nylon fibres. RMC analysis provided a new perspective into the impact of microplastics on tropical coastal food webs.
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