Bioenergy<\/a> has been in the spotlight a lot lately because of its questionable \u2018sustainability\u2019. But in Poland, the production of biomass energy has become part of the <\/strong>Polish Society for the Protection of Bird<\/strong><\/a>\u2019s<\/strong> (OTOP) <\/strong>strategy<\/strong><\/a> to help bring the <\/strong>Aquatic Warbler<\/strong><\/a>, one of Europe\u2019s few globally threatened migratory songbirds, back from the edge of extinction.<\/strong><\/p>\n Aquatic Warbler are small brown sparrow sized birds. Unlike other songbirds, the males sing at sunset rather than sunrise during the breeding season. Another interesting trait is that they\u2019re rather promiscuous since both sexes mate with multiple partners and a single brood can be sired by up to five different fathers. The females build nests on the ground on sedge tussocks or within dry plant material and then raise chicks entirely on their own.<\/p>\n Current global distribution of Aquatic Warbler<\/em><\/strong><\/p>\n Once found throughout Europe, this species is now classified as \u2018vulnerable\u2019 on the European Red List of Birds<\/a> (based on IUCN Red List criteria and categories) and the IUCN Red List of Endangered Species<\/a>. Today, it\u2019s limited to a very tiny area with only 60 known breeding sites, mainly in Poland, Belarus and Ukraine. Why is it in so much trouble? Well, this species is an extreme habitat specialist. During the breeding season it depends exclusively on fen<\/a> mire habitat and open wet peat meadows. These meadows must be covered by sedges to offer protection and must also have stable water levels so nests aren\u2019t flooded. But natural fen mire habitat has disappeared across Europe because of drainage and conversion to agriculture. Also, the loss of traditional farming practices like hand-mowing and cattle grazing, which helped keep suitable open wet meadow habitat available, are no longer practiced. These two factors are largely responsible for the demise of the species.<\/p>\n With nearly a quarter of the remaining population still breeding in Poland, the Polish Society for the Protection of Bird<\/a>\u2019s (OTOP) and other partners have made it a priority to save the bird. Under the \u2018Aquatic Warbler and Biomass\u2019<\/a> project, they were able to do so by recreating and restoring suitable breeding habitat in 6 Natura 2000 Special Protection Areas<\/a>. They\u2019ve been doing this by removing trees and mowing wet overgrown fields in selected sites with a modified piste basher (snow groomer), a vehicle used on ski slopes and able to handle very wet conditions unlike traditional tractors.<\/p>\n Next came the question: what to do with all the cut vegetation (mown sedges, reeds, grasses)? It has little value as cattle fodder because of its low nutritional quality, so alternatives in biomass management were explored and tested: biogas production, composting and production of solid fuel (briquet\/pellet). After some investigation, the best solution was to turn it into a sustainable renewable solid fuel \u2013 briquette or pellet.<\/p>\n\n\t\t![\"Global](\"https:\/\/eubioenergy.files.wordpress.com\/2016\/02\/global-distribution-aquatic-warbler.png\")
<\/p>\n