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Compensation measures

 

The wind farm off the Bay of Saint-Brieuc, carried by Ailes Marines, obtained on 18 April 2017, from the Prefecture of Côtes-d'Armor, the administrative authorisation known as "Autorisation Unique IOTA" under the provisions of Articles L.214-1 et seq. of the Environment Code.

This authorisation prescribes several measures for monitoring, reducing, compensating or accompanying the environment. The purpose of the compensation measures is to neutralize the potential negative effects of the wind farm through the deployment of positive environmental measures.

Improving the tranquility of marine mammals

During construction:

Habitat loss/change
Risk of mortality/injury due to noise (threshing)
Disturbance due to vessels and noise
Risk of collision with vessels

During operation:

Negligible impacts

The purpose of this measure is to enhance the tranquility of marine mammals in the Gulf of Normandy Breton during the construction phase of the wind farm off the coast of Saint-Brieuc Bay.

Several meetings have been organised with State services (DREAL, OFB, DDTM, PREMAR), and experts on Marine Mammals (Al Lark, Océanopolis, GECC), during 2019 and early 2020.

The species targeted by this awareness program are the main cetacean and pinniped species found in the Gulf of Normandy Breton, namely the bottlenose dolphin, common dolphin, Risso's dolphin, porpoise, seal calf and grey seal.

Several components are implemented:
Several awareness-raising tools are being developed:

Booklet

Creation of a booklet whose content was discussed with the State services and experts previously mentioned.
z

Outreach Operations

Participation in two annual awareness-raising operations for the years 2021, 2022 and 2023.

ObsenMer

Valuation of the ObsenMer application (participatory science).

While the eastern part of the bay is the subject of active outreach, notably by Al Lark, the western part of the bay is less subject to outreach around marine mammals and will therefore be mainly targeted for Ailes Marines actions.

carte-quietude-animals

While the eastern part of the bay is the subject of active outreach, notably by Al Lark, the western part of the bay is less subject to outreach around marine mammals and will therefore be mainly targeted for Ailes Marines actions.

Planning and Status

Z

Measure put in place

2020

  • In the pre-construction phase 87% 87%

2022

  • Under construction 0% 0%

2024, 2025, 2026, 2034, 2044

  • In the operational phase 0% 0%

Combating the predation of seabirds by black crows

During construction:

Habitat loss/change
Risk of injury from underwater noise (ramming)
Disturbance from ships
Risk of collision with ships

During operation:

Risk of Collision
Habitat Loss / Modification

Various crow control operations have been carried out on Cap Fréhel since 2012. These operations were aimed at limiting predation on seabird nests by crows that tend to specialize on the Guillemot de Troïl and the Black-legged Kittiwake. The Syndicat Mixte Grand Site Cap d'Erquy Cap Fréhel, an experienced operator of this practice, has been implementing this compensation measure on behalf of Ailes Marines since 2019.

The 2019 season resulted in the capture of nine crows on Cape Fréhel (similar result to 2018). All high-stake species reached an all-time high for Cape Frehel over the period monitored. The regulation of predation by the Black Crow is undoubtedly related to the observed increase in numbers.

the black-legged kittiwake

The number of breeding pairs is at an all-time high of 305 (up 87 pairs in 2019). The number of birds has been increasing almost constantly since the first crow control operations.

the guillemot of Troil

The results are very encouraging, with more than 500 couples registered.

the penguin torda

The demographic trend gives hope for a recovery of the population. The 2019 population recorded on Cap Fréhel is therefore 52-55 breeding pairs.

the crested cormorant

Juvenile production has reached a record high since the start of juvenile production monitoring (average of 1.88 juveniles per breeding pair).

An important predation by the Peregrine Falcon is to be underlined. The implementation of this measure is a success and is bearing fruit. The 2020 campaign is in progress (April - June 2020).

The measure is implemented on land, on the cliffs of Cap Fréhel.

carte-cap-frehel

The measure is implemented on land, on the cliffs of Cap Fréhel.

Planning and Status

Z

Measure put in place

This compensatory measure is put in place before work begins, then extended annually for a period of 10 years and then, if necessary, every 2 years until the end of the project's life.

Eradication of American Mink on the Tregor Islands - pink granite coast

During construction:

Habitat loss/change
Risk of injury from underwater noise (ramming)
Disturbance from ships
Risk of collision with ships

During operation:

Risk of Collision
Habitat Loss / Modification

This compensation measure is part of the multi-partner programme, set up under the name "Trégor-Gestion-Vison", run by the Fédération départementale des chasseurs des Côtes d'Armor, the Conservatoire du Littoral, the LPO, the commune of Perros-Guirec, Lannion Trégor Communauté and Ailes Marines. 

It has three main objectives:

The operations are part of an overall project for the ecological restoration of the island for the benefit of breeding seabird colonies.

 

Between July 2017 & October 2018 :

0 daily outings made
"

have identified

0 mink prints

In 2019:

0 daily outings made
"

have identified

0 mink prints

The 3 observations of the year 2019 were all made during the first outing of the season on 9/04/2019 and no other presence index was thus noted afterwards on the surveys carried out from May to October 2019. These 2019 results are out of proportion with those observed in 2018 (88 indices) and 2017 (100 indices).

These results allow us to observe for the first time a clear drop in the presence indices suggesting the near disappearance of the American mink on Tome Island. The first monitoring carried out in 2020 did not reveal any new traces, and some breeding birds have returned to the Island, a sign of the effectiveness of the measure. After a period concentrated on the regulation of the species and with the observed decrease of the presence indices, the measurement is now mainly turned towards the genetic analysis of samples to try to characterize the origin of mink on Tome (INRA Rennes). Nevertheless, the field surveys continue to confirm the trend.

The monitoring is carried out on the whole Tome Island, when tidal conditions allow it.

carte-ile-tome

The monitoring is carried out on the whole Tome Island, when tidal conditions allow it.

Planning and Status

Z

Measure put in place

This compensatory measure has been in place since 2017, as follows:

  • Trapping - Eradication: Annual action for 5 years
  • Three-yearly monitoring after the eradication period and for the life of the project