Solar farms boost biodiversity, new comprehensive study shows

New research shows that solar farms can significantly improve local biodiversity, with benefits to wildlife and potentially even surrounding crops

New research published last week [1] has found that solar farms have a positive impact on biodiversity for a range of plant and animal species when combined with an appropriate land management plan, in particular broad leaved plants, grasses, butterflies, bumblebees and birds.

The report has tested and confirmed a growing body of anecdotal evidence that solar farms can actively benefit local wildlife. It also further validates advice given by biodiversity specialists, such as the BRE National Solar Centre Biodiversity Guidance for Solar Developments [2], which demonstrates that solar PV can be combined with agricultural activity such as grazing while benefitting the natural health of the surrounding area.
The Effects of Solar Farms on Local Biodiversity: A Comparative Study [1] was carried out by ecological consultants Clarkson & Woods and Wychwood Biodiversity and examined 11 solar farms in England and Wales alongside neighbouring control plots. The authors claim that the research is the most comprehensive and in depth UK study in the field so far.
Leonie Greene, spokesperson for the Solar Trade Association commented:
"Were delighted with the findings of this survey. It confirms that solar farms, when done properly, are an asset to our countryside and our natural environment. It also reaffirms the best practice standards our members have set out in our ‘10 Commitments for Solar Farms [3]. By adhering to these standards solar farms can enhance the ecological value of the land and encourage land diversification."
At each of the 11 selected sites various methods of land management were being used including seeding sites with a diverse seed mix, limiting the use of herbicides, conservation grazing or mowing, and management of marginal habitats for wildlife. The level of benefit to biodiversity is dependent on the management - the stronger the focus on wildlife management the better. In this way, solar farms provide a ‘mosaic of meadow habitat and important foraging grounds and shelter for many species.
The report goes on to suggest that the findings are not only beneficial for wildlife but could also provide ecosystem services important for people and agriculture. For example, by becoming net producers of pollinating insects, which are in decline across the UK, solar farms can promote the health of surrounding crops such as cereals, vegetables, soft fruits and orchard fruits. Furthermore, ‘solar farms are unique in the farmed landscape in that they provide a high value ‘crop (solar power) while leaving the majority of the land area free for wildlife management. The authors call for more research in this area.
Paul Barwell, CEO of the Solar Trade Association commented:
"We set up our new STA Operations and Maintenance Working Group to ensure that the industry looks after its assets in the best possible way. O&M is a key part of ensuring not just asset optimisation, but ensuring high standards in health and safety as well as land management. Solar is low maintenance, but not zero maintenance."

Background on the Solar Trade Association:

The mission of the Solar Trade Association is to empower the UK solar transformation. We are paving the way for solar to deliver the maximum possible share of UK energy by 2030 by enabling a bigger and better solar industry. We represent both solar heat and power, and have a proven track record of winning breakthroughs for solar PV and solar thermal.

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