Acute toxicity of photosystem II herbicides to tropical seagrass 2013. (NERP TE 4.2, AIMS and JCU)

This dataset shows the measured response of the photosystems of seagrasses to herbicides in experiments conducted in 2012-2013. The data is provided as a multi-sheet spreadsheet.

The aim of this study was to apply standard ecotoxicology protocols to quantify the concentrations of four priority PSII herbicides that inhibit photochemistry by 10, 20 and 50% (IC10, IC20 and IC50) over 72 hrs in two common seagrass species from the GBR lagoon. This data will enable improved assessment of the risks posed by PSII herbicides to tropical seagrass for both regulatory purposes and for comparison with other taxa.

Methods:

Four seagrass species (H. uninervis, C. rotundata, T. hemprichii and Z. muelleri) were used in preliminary studies to determine the time taken for PSII herbicides to affect photosynthesis, while more detailed ecotoxicology studies were undertaken with two of these species (H. uninervis and Z. muelleri). H. uninervis, C. rotundata and T. hemprichii were collected from intertidal seagrass meadows (