Table 1 Species sensitivity distribution (SSD) parameters and data filters used to derive multiple thresholds as part of the tiered framework
From: Risk-based management framework for microplastics in aquatic ecosystems
Threshold description | Hazard concentration (HC) | Data collapsing method | Point estimate | Biological scale of endpoints |
|---|---|---|---|---|
Threshold 1- “Investigative monitoring” | HC5 | 1st quartile | lower 95% | molecular to population |
Threshold 2- “Discharge monitoring” | HC5 | 1st quartile | median | molecular to population |
Threshold 3- “Management planning” | HC5 | median | median | organismal and population |
Threshold 4- “Source control measures” | HC10 | median | median | organismal and population |