SEA2 Technical Report: Marine Mammal Distribution and Threats in the North Sea

A 2001 technical report for the UK's Strategic Environmental Assessment SEA2 describes the distribution and abundance of marine mammals in the North Sea. The report details eight regularly occurring species, including the harbour porpoise with a population estimated at 268,000 in summer 1994, and discusses threats from offshore industry noise, pollution, and ship strikes. It was produced as a contribution to the UK Department of Trade and Industry (now Department of Energy and Climate Change).

Use Cases

• Modeling species distribution and abundance for conservation planning based on reported population estimates and ranges.
• Assessing the potential impact of underwater noise pollution on marine mammal behavior based on the discussion of seismic surveys, drilling, and decommissioning.
• Evaluating collision risk for large whales based on the description of threats from increased shipping traffic.
• Studying the effects of oil spills and other pollution on seal and cetacean populations as discussed in the report.

Strengths

• Provides a specific population estimate (268,000) for the harbour porpoise in the North Sea for summer 1994.
• Covers a comprehensive list of 23 marine mammal species reported in the region, detailing eight regular and 15 infrequent species.
• Discusses multiple concrete anthropogenic threats: underwater noise from oil/gas operations, pollution, and ship strikes.

Limitations

• Row count and column-level documentation are absent; the report's structure and specific data fields must be inferred after access.
• Last update date is unknown; the core data reflects a 1994 population estimate within a 2001 report, so freshness is unverified.
• The primary format is HTML, which may require parsing to extract structured data for analysis.

Provenance

Source

Government Digital Service, as a contribution to the UK Department of Trade and Industry's (DECC) Strategic Environmental Assessment.

Collection Method

Likely compiled from scientific surveys, observations, and existing literature for the SEA2 assessment.

Time Range

Report published in 2001, with referenced data from at least 1994.

Freshness

Report published in 2001, with cited data from 1994; freshness unverified.

Geography

North Sea, specifically the northern and central SEA2 assessment areas.