Table 1.

Parameter values used in the presented simulations.

Simulation	Fraction of total annual waste as microplastic	Fraction assigned a rise rate	Fraction returning to water column from seafloor	Marine snow aggregation fraction	Aggregate uptake of microplastic constant	Relative grazing selectivity	Food-to-microplastic conversion ratio
No Bio	0.260	0.033	–	–	–	–	–
LH	0.137	0.003	0.132	0.003	0.424	0.260	1.029
HC	0.329	0.074	0.888	0.098	833.290	0.132	1.489
MC	0.276	0.011	0.528	0.092	615.508	0.193	0.993

A full model description can be found in our accompanying manuscript⁷.