Three floating turbines sat off Portugal for five years, and eight years of monitoring found more octopuses and fish inside their patch of ocean than at the control sites

A multi-year study of floating turbines off Portugal’s coast revealed surprising ecological findings.

Global offshore wind power is rapidly growing to meet urgent clean energy needs.

Concerns are rising over the impacts on ocean biodiversity where these installations are being deployed.

Blue Grid and research groups like the University of Lisbon’s MARE center tracked ecosystems across the different project phases.

However, research in Portugal suggests floating structures may be less invasive than previously believed.

Will these findings convince the world that floating wind sites can become unexpected refuges for diverse marine wildlife?

How the role of wind has dynamically changed

Ancient civilizations also relied on wind energy, but for much different reasons.

For many years, basic windmills harnessed wind to grind grain and pump water for agricultural use.

As the twentieth century commenced, electricity generation kicked off.

The 1973 oil crisis finally spurred a modern transition toward large-scale power production.

Interest in the source was mainly driven by the need for energy independence.

However, it soon became essential in meeting climate goals.

By the 1990s, it became clear that wind turbines generate utility-scale power while significantly offsetting carbon emissions.

But demand for decarbonization and high-density electricity has significantly increased in modern society.

While global wind capacity may exceed 1,346 gigawatts today, more rapid deployment is needed to meet rising modern-day needs.

This led developers to deploy turbines offshore, where there are no land-based barriers and higher and more consistent wind.

Not long after, the sector sought even deeper waters.

The ongoing search for higher offshore deployment

Wind power surged significantly more than expected, with offshore generation playing a big part.

Global offshore capacity is currently 92.5 gigawatts, the equivalent of providing clean electricity for more than 100 million homes.

As the sector continues to grow, tens of millions of metric tons of carbon emissions are offset annually.

However, climate change accelerates, requiring further decarbonization. This is where standard offshore wind turbines face a bottleneck.

These foundation-based installations can only be deployed in waters under 600 feet deep.

This spatial limitation has increased congestion in shallow coastal waters.

Commercial fisheries, maritime traffic, and energy projects must now compete for space.

To ensure further capacity growth, developers turned to floating wind turbines that can operate in the deep ocean.

The floating infrastructure may offer distinct benefits, but it still raises concerns about potential ecological consequences.

However, multi-year monitoring of the WindFloat Atlantic may ease some of these concerns.

Analyzing the ecological effect of floating turbines

The WindFloat Atlantic project was initiated by Ocean Winds.

The goal was to collect and publish biodiversity data, captured over eight years of monitoring.

The 25-MW floating wind farm consists of three giant turbines. The project is located 12.4 miles off the coast of Viana do Castelo, Portugal.

Blue Grid and research groups like the University of Lisbon’s MARE center tracked ecosystems across the different project phases.

Revealing a thriving biological community

Natural seasonal shifts drove all marine cycles, while the three turbines became an ecological sanctuary.

An evaluation of all marine species, from plankton to fish, mammals, and birds, took place. This revealed over 270 species living in the area.

More specifically, there was a higher abundance and biomass of octopuses and fish like sharks, rays, and flatfish.

This is attributed to the “artificial reef effect” caused by the steel and chain structures.

Additionally, the safety regulations surrounding the site enforced navigation and commercial fishing exclusion zones.

Together, this created an unexpected marine refuge.

The multi-year monitoring’s findings present a positive outlook for similar floating wind projects in the future.

It proves that commercial deep-sea wind generation can be ecologically beneficial.

However, it is vital that developers implement continued long-term environmental monitoring as a core standard.

Future projects should also integrate fishing exclusion zones to boost biodiversity conservation.

Ultimately, floating structures that include artificial reef frameworks are vital for future capacity growth.