A new plant-based biomonitoring scheme for tropical African rivers is described.
Trophic ranking scores (ZTRSsp) are given for 156 Zambian macrophyte species.
ZMTR indicated trophic status reasonably accurately for 83.1% of Zambian samples.
An independent test dataset from Botswana also showed a positive test outcome.
Examples show the ability of ZMTR to indicate current and hindcast trophic status.