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Setting new thermal standards for transitional and coastal (TraC) waters
Andrew Wither1, Roger Bamber, Steve Colclough
1National Oceanography Centre, 6 Brownlow Street, Liverpool L3 5DA, UK. awith@noc.ac.uk
Marine Pollution Bulletin
|June 19, 2012
Summary
New coastal power stations require updated thermal discharge standards for marine ecosystems. This review assesses impacts on fish and proposes sustainable guidelines for heated effluents in transitional and coastal waters.
Area of Science:
- Environmental Science
- Marine Biology
- Ecotoxicology
Background:
- Growing number of coastal power stations in Western Europe necessitate updated thermal discharge regulations.
- Existing guidelines for heated effluents are often adapted from freshwater practices, lacking marine-specific validation.
- Limited independent research exists on the ecological impacts of increased thermal discharge volumes in coastal and transitional waters.
Purpose of the Study:
- To review current knowledge on the tolerance and behavior of marine biota to thermal discharges.
- To assess the adequacy of existing thermal discharge standards in the context of rising seawater temperatures.
- To propose new, sustainable thermal standards for coastal and transitional waters.
Main Methods:
- Literature review of existing studies on thermal tolerance in marine organisms.
- Analysis of current thermal discharge standards and their applicability to marine environments.
- Assessment of potential impacts on sensitive marine species and ecosystems.
- Development of a framework for evaluating thermal standards against predicted temperature increases.
Main Results:
- Identified a lack of robust, marine-specific standards for thermal discharges from power stations.
- Highlighted the inadequacy of freshwater-based guidelines for heated effluents in coastal and transitional waters.
- Determined that certain fish species and marine organisms are particularly vulnerable to thermal pollution.
- Found existing standards to be inconsistent and often insufficient when considering predicted seawater temperature rise.
Conclusions:
- Urgent need for new, evidence-based thermal discharge standards for coastal and transitional waters.
- Recommendations provided for grouping species based on thermal sensitivity to inform regulatory approaches.
- Proposed thermal standards aim to ensure the long-term ecological sustainability of marine environments affected by heated effluents.
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