Microplastics contamination in natural sea turtle nests at Redang Island, Malaysia

Aina Arifah Khalid; Nur Izzati Abd Razak; Sabiqah Tuan Anuar; Yusof Shuaib Ibrahim; Mohd Uzair Rusli; Maisarah Jaafar

doi:10.1016/j.marpolbul.2024.117412

Microplastics contamination in natural sea turtle nests at Redang Island, Malaysia

Mar Pollut Bull. 2024 Dec 13:211:117412. doi: 10.1016/j.marpolbul.2024.117412. Online ahead of print.

Authors

Aina Arifah Khalid¹, Nur Izzati Abd Razak¹, Sabiqah Tuan Anuar¹, Yusof Shuaib Ibrahim², Mohd Uzair Rusli³, Maisarah Jaafar⁴

Affiliations

¹ Microplastic Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
² Microplastic Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
³ Sea Turtle Research Unit (SEATRU), Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
⁴ Microplastic Research Interest Group (MRIG), Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia. Electronic address: maisarah@umt.edu.my.

PMID: 39674038
DOI: 10.1016/j.marpolbul.2024.117412

Abstract

This study presents the first evidence of microplastics in natural sea turtle nests at Chagar Hutang Turtle Sanctuary (CHTS) on Redang Island, a crucial habitat for green turtles. Microplastics were detected in all studied turtle nests (0-70 cm depth), with a total abundance of 12,270 microplastic items per kg dry weight of sand. Fibers (80.7 %) were the most prevalent shape, primarily black (37.9 %), with a high proportion of small-sized particles (<300-1000 μm), indicating prolonged accumulation and environmental degradation. These microplastics, primarily polyethylene terephthalate (PET) and polyethylene (PE), are likely from fishing nets, food packaging, and textiles. Despite the sanctuary's remote location, it is heavily impacted by microplastics carried by tides and wind, raising concerns about their potential effects on turtle egg incubation. The findings offer critical insights into the impact of microplastics on turtle habitats and underscore the urgent need for conservation efforts to protect green sea turtles in Malaysia.

Keywords: Beach sand; Microplastic; Polyethylene terephthalate (PET); South China Sea; Turtle nesting.