Microplastic ingestion by zooplankton in Ko Sichang, Chonburi Province


  • Sirirat Jaihan Ramkhamhaeng University
  • Makamas Sutthacheep Ramkhamhaeng University
  • Sitiporn Pengsakun Ramkhamhaeng University
  • Duangkamon Sangiamdee Ramkhamhaeng University


microplastic, copepods, zooplankton, Gulf of Thailand, plastic debris


Microplastics (<5 mm) have become serious pollution from anthropogenic activities in marine ecosystem. Zooplankton can ingest microplastic and be transferred to marine food webs through ingestion and accumulation of marine organisms. This reserch aims to investigated microplastics ingested by different groups of zooplankton at Ko Sichang. Microplastics were analyzed under a stereomicroscope and identified by using Fourier transform infrared spectroscopy (FTIR). Fibre microplastics were detected at all dominant zooplankton groups here: cyclopoid copepods, calanoid copepods, crustacean nauplii and gastropod larvae. Two types of microplastics were found including Polyethylene terephthalate (PET) and Polypropylene (PP). Moreover, cyclopoid copepods and calanoid copepods at Ko Sichang were found microplastic higher than those from the exclusive economic zone of the Andaman. Based on the findings, it may be utilized as an indicator for assessing the ecological risk of microplastics in marine organisms. This is threat to higher levels of food chain, including humans. It is crucial to conduct a risk assessment of microplastics on ecosystem, social and economic levels.


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