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Whales are our climate allies – meet the scientists busy proving it

At Whale and Dolphin Conservation, we're working hard to bring whales and the ocean into...
Humpback whale underwater

Climate giants – how whales can help save the world

We know that whales, dolphins and porpoises are amazing beings with complex social and family...
Black Sea common dolphins © Elena Gladilina

The dolphin and porpoise casualties of the war in Ukraine

Rare, threatened subspecies of dolphins and porpoises live in the Black Sea along Ukraine's coast....
WDC's Ed Fox, Chris Butler-Stroud and Carla Boreham take a message from the ocean to parliament

Taking a message from the ocean to parliament

It's a sad fact that whales and dolphins don't vote in human elections, but I...
Minke whale © Ursula Tscherter - ORES

The whale trappers are back with their cruel experiment

Anyone walking past my window might have heard my groan of disbelief at the news...
Boto © Fernando Trujillo

Meet the legendary pink river dolphins

Botos don't look or live like other dolphins. Flamingo-pink all over with super-skinny snouts and...
Tokitae in captivity

Talking to TUI – will they stop supporting whale and dolphin captivity?

Last Thursday I travelled to Berlin for a long-anticipated meeting with TUI senior executives. I...

Earth Day Q&A with Waipapa Bay Wines’ marketing director, Fran Draper

We've been partnered with Waipapa Bay Wines since 2019 so for this year's Earth Day,...

20th Biennial Conference on the Biology of Marine Mammals Part 1

Wind, Whales, and Dolphins – the conservation impacts of marine renewables

The 20th Biennial Conference on the Biology of Marine Mammals is taking place this week in Dunedin, New Zealand.  This is the largest international conference focused on marine mammals and WDC is there to present our conservation work to the world. 

“Many difficult and complex conservation issues highlighted at this conference. One issue which floats to the top as having increasing significance is the growing industry of marine renewable energy. Whilst the need to replace our dependence on fossil fuels is paramount, a new report from WDC (7.5mb) on this issue also helped to highlight the need for greater collaboration between those developing marine renewables and the need for further research to determine critical coastal habitat to avoid conflicts between marine renewable developments and marine wildlife, especially marine mammals.”– Philippa Brakes, Senior Biologist, WDC

PRESENTATION ABSTRACT: The marine renewables dilemma –  Brakes, Philippa 1; Simmonds, Mark Peter 2 – (1) Whale and Dolphin Conservation   (2) Humane Society International

Marine renewable energy installations are developing at great speed all around the world as part of efforts to tackle Climate Change. A variety of associated potential threats to marine mammals have been identified. Common concerns for all types of renewable devices include the noise made especially during construction, particularly where piledriving is involved. In addition, structures may be a source of chemical contaminants, including antifouling treatments. Construction and operational noise may lead to displacement and other behavioural changes. Intense noise might cause impairment of auditory senses; and/or masking and stress responses. Tidal-stream energy devices typically comprise turbines that are entirely submerged and moving at speed (commonly up to 12 m.s-1, or 43 kph) relative to the streaming water mass, presenting a collision risk. Wave energy converters also represent a collision risk; as does the increased vessel traffic associated with construction and maintenance work. Vessels may be of novel design in order to operate within the renewable arrays or hold themselves static without anchoring, and this may bring new risks.

These concerns have been well sketched but there is very little relevant information to inform this rapidly expanding multifaceted industry; most relevant studies have been done in Europe and mainly concern the harbour porpoise. Individual installations and arrays are all set to become far larger than the operations that are in place currently which presents challenges in terms of extrapolation of impacts based on current monitoring. The marine renewables industry is widely regarded as an important part of future energy security and, as such, it tends to have high level political support. However, this is an unprecedented incursion by industry into inshore and offshore habitats, including what balanced and more precautionary strategy is needed that attempts to reconcile energy needs, uncertainty, conservation and welfare.