Table 3. Vertical Distribution of MPs by Polymer Type.

reference	studied area	depths	abundance concentration	polymer type
(28)	Cléry-Saint-André, France	0–5 cm	2.9 g·kg–1	PVC: 60.31%; PP: 17.86%; PS:14.64%; PE: 3.52%
		15–20 cm	2.544 g·kg–1	PVC: 73.43%; PP: 7.94%; PS: 7.82%; PE: 8.37%
		30–35 cm	0.9 g·kg–1	PVC: 51.84%; PP: 21.92%; PS: 4.85%; PE: 11.17%
(59)	Amu Darya–Aral Sea basin, Republic of Uzbekistan	0–5 cm	2064 ± 288 items·kg–1	PU: 49.6%; SR: 17.6%; PMMA: 6.1%
		5–20 cm	3567 ± 533 items·kg–1	PU: 36.7%; SR: 17%; PLA: 15.8%
		20–50 cm	6419 ± 1362 items·kg–1	PU: 31.5%; SR: 16.6%; CPE: 9.2%