Antarctic Macroalgae Fluorescence Response to Heavy Metal Exposure

Eighteen experiments from 2005-2006 measured chlorophyll fluorescence decline in three Antarctic macroalgae species exposed to copper, zinc, and cadmium. Data consists of hourly 2D image files captured by a robotic PAM fluorometer, organized by experiment, species, metal, and duration. The dataset was collected at Casey Station by the Australian Antarctic Data Centre.

Use Cases

• Model the temporal decline in fluorescence parameters like Fm` and Y(II) against metal concentration and exposure duration.
• Compare species-specific stress responses (Desmerestia menziesii, Palmaria decipiens, Himantothallus grandifolius) to different heavy metals using image sequences.
• Analyze the unique fluorescence increase at ~50 hours post-exposure to zinc, contrasting it with the logarithmic decline from copper.
• Use dark-adapted control images ('T01-darkadapted') as a baseline to quantify specimen health degradation over time.

Strengths

• Eighteen distinct experiments provide multiple observations for three metals and three species.
• Hourly image capture generates dense time-series data for fluorescence parameter tracing.
• Includes pre-experiment dark-adapted control images for baseline health assessment.

Limitations

• Sample size is limited to specimens from a single Antarctic region (Casey Station), reducing geographic generalizability.
• Data is from a single summer season (2005-2006), limiting temporal analysis of long-term or seasonal effects.
• The primary data format (*.pim) requires specific, provided software (Imaging-WIN) for access and analysis.

Provenance

Source

Australian Antarctic Data Centre (AU_AADC) via NASA Earthdata.

Collection Method

Robotic PAM fluorometer measurements on macroalgae in test chambers with metal-spiked seawater at Casey Station.

Time Range

Summer 2005-2006.

Freshness

null

Geography

Casey Station, Antarctica; specimens collected from ~6-12m depth in uncontaminated nearshore areas.