Dorset Seagrass and Sea Pen Video Sledge Survey, 2000

A 2000 video sledge survey of Portland Harbour and Ringstead, Dorset, conducted by the National Oceanography Centre Southampton for Dorset Wildlife Trust. Differential GPS positions were continuously recorded against video time code for tracks at 200m spacing throughout the harbour. The data was supplied electronically by Dr. Ken Collins and has been incorporated into subsequent reports.

Use Cases

• Map seagrass (Zostera marina) and sea pen (Virgularia mirabilis) distribution based on the video survey mentioned in the description
• Analyze coastal habitat changes over time by comparing this 2000 survey with later data
• Train object detection models for marine species using the annotated video frames referenced in the associated BSc dissertation
• Study the impact of human activity (e.g., port exclusion zones) on shallow-water ecosystems based on the survey's spatial coverage

Strengths

• Survey conducted by a recognized institution (National Oceanography Centre Southampton) on behalf of a conservation trust
• Geospatial precision from differential GPS positions synchronized with video time code
• Includes data from two distinct survey methods: a towed video sledge and a small inflatable with a self-contained camcorder

Limitations

• Row count and column-level documentation are absent; field semantics must be inferred after download
• Last update date is unknown; freshness unverified
• Data may reflect geographic and temporal bias inherent to a single 2000 survey in Dorset

Provenance

Source

National Oceanography Centre Southampton (NOC), supplied by Dr. Ken Collins.

Collection Method

Video sledge survey with a towed color camera and GPS positioning.

Time Range

2000

Freshness

Data from 2000; update frequency unknown.

Geography

Portland Harbour to Ringstead, Dorset, UK.