Biodiversity and ecosystem management Biodiversity and ecosystem management
Biodiversity and ecosystem management



Biodiversity and ecosystem management

Biodiversity is one of the most important environmental descriptors taken into account in the systematic assessment of the potential impacts of REN's activities in the various phases of the life cycle of its infrastructures.

For this reason, the company's activities in this matter are structured in accordance with the following lines of action:

In 2008 REN joined the Business and Biodiversity (B&B) initiative, establishing for this purpose a Memorandum of Understanding with the Instituto de Conservação da Natureza e da Biodiversidade which included a LIFE+ project in partnership with the Liga para a Protecção da Natureza. This project included a number of conservation actions for three species of steppe birds (the great bustard, the little bustard and the lesser kestrel) in areas of the Rede Natura 2000 in the Baixo Alentejo.

For more information consult the Annual Report.

Conservation projects

REN conducts regular awareness-raising and responsibility actions to involve the various social actors in land management. They include farmers, hunters, forest managers, central, regional and local government officials and business people. In addition, special attention is given to the involvement of all employees, suppliers, and service providers working with REN.

REN implements various measures to minimise effects on areas of high-value biodiversity, establishing several partnerships with environmental NGOs in order to develop studies to mitigate or offset the impacts caused by our activities on biodiversity.

Anti-collision devices for birds

In the construction of very high voltage lines, REN seeks to minimise the occurrence of impacts on birds by selecting locations that avoid the most critical situations of compatibility with habitats and migration routes of some species. However, these initiatives are not always enough to prevent the existence of negative impacts. In these cases, it is necessary to identify and implement additional mitigation measures.

To minimise the possible collision of birds, signalling devices called Bird Flight Diverters (BFDs) are usually installed, which are spiral-shaped devices with double fixation, about 30 cm in diameter and 1 metre in length. They come in orange and white colours. The spacing between these devices in the potentially most impactful line sections takes into account the territory zoning defined in joint studies with the ICNB.

Since 2009, REN has been carrying out an ongoing study in partnership with QUERCUS, in order to evaluate the effectiveness of new anti-collision devices in reducing the collision of wild birds with RNT cables. These are called FBFs - Firefly Bird Flappers.

The Baixo Alentejo region was selected for this study based on data collected in previous studies (protocol REN - Instituto de Conservação da Natureza e da Biodiversidade), enabling the evaluation of the effectiveness of the installation of devices for species such as the great bustard, the little bustard and the crane. These devices were installed on the lines of Ferreira do Alentejo - Évora and Palmela - Évora, both 150 kV. The study has also assessed the impact of the FBFs on noise descriptors as well as on the landscape. It was concluded that the use of these devices does not induce a significant change in these descriptors.



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