Herbicide Effects on Diatom Growth and Photosynthesis, 2018-2019 Lab Experiments

Laboratory experiments from 2018-2019 measured the effects of four herbicides on the microalgae Chaetoceros muelleri. The dataset includes growth rates from cell density data and photosynthetic efficiency measured as effective quantum yield. This work was conducted under the NESP TWQ 3.1.5 project by AIMS and JCU.

Use Cases

• Modeling dose-response relationships for herbicides based on growth inhibition data.
• Comparing toxicity of Photosystem II and alternative herbicides on a key microalgal species.
• Calibrating ecotoxicology protocols for regulatory risk assessment of coastal pollutants.

Strengths

• Data from controlled laboratory experiments with specified culture conditions (26 ± 1°C, 35 psu, 12:12 light:dark cycle).
• Focus on four specific, analytically graded herbicides (diuron, tebuthiuron, propazine, haloxyfop-p-methyl) detected in the Great Barrier Reef catchment.
• Includes two distinct toxicity endpoints: 72-hour growth bioassays and 24-hour photosynthetic efficiency measurements.

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 laboratory bias inherent to controlled ecotoxicology studies.

Provenance

Source

Australian Ocean Data Network, NESP TWQ 3.1.5 project (AIMS and JCU).

Collection Method

Standard ecotoxicology protocols using laboratory bioassays and imaging PAM fluorometry.

Time Range

2018-2019

Freshness

Last updated 2026-07-13 15:15:15.596334; freshness should be verified.

Geography

Great Barrier Reef catchment area (laboratory study).