Acute Toxicity of PSII Herbicides to Tropical Seagrass, 2012-2013 Experiments

Four seagrass species were exposed to four priority PSII herbicides in controlled experiments to measure inhibition concentrations (IC10, IC20, IC50) over 72 hours. The dataset, from the NERP TE 4.2 project by AIMS and JCU, contains dose-response curves derived from pulse amplitude modulation fluorometry measurements. Data is provided as a multi-sheet spreadsheet from experiments conducted in 2012-2013.

Use Cases

• Modeling herbicide dose-response relationships for seagrass based on IC10, IC20, and IC50 values.
• Comparing photosynthetic sensitivity between seagrass species (H. uninervis, Z. muelleri) to PSII herbicides.
• Assessing environmental risk for regulatory purposes using inhibition concentrations derived from PAM fluorometry.
• Calibrating ecotoxicology models with data from static-replacement seawater experiments under controlled light and temperature.

Strengths

• Experiments were conducted under controlled conditions (25.8 ± 0.3°C, 273 ± 17 µmol photons m-2 s-1) matching field conditions.
• Dose-response data includes three inhibition thresholds (IC10, IC20, IC50) for two photosynthetic yield parameters.
• Data covers four priority PSII herbicides tested on two common seagrass species from the Great Barrier Reef lagoon.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to collection sites at Magnetic Island and Gladstone, Australia.

Provenance

Source

Australian Ocean Data Network (via data_gov_au), NERP TE 4.2 project (AIMS and JCU).

Collection Method

Laboratory ecotoxicology experiments using static-replacement seawater and PAM fluorometry.

Time Range

2012-2013

Freshness

Last updated 2026-07-10 13:10:37.813072; freshness should be verified.

Geography

Great Barrier Reef lagoon, Australia (collection sites: Magnetic Island, Gladstone).