Thursday, August 12, 1999 Published at 11:10 GMT 12:10 UK
Farmland birds in crisis
European farming is hurting wildlife
By Environment Correspondent Alex Kirby
A team of British researchers is calling for reform of Europe's agricultural policy to allow birds and other wild creatures a greater chance of survival.
The team estimates that, in Britain alone, loss of biodiversity has meant the disappearance of 10 million breeding individuals of 10 farmland bird species in the past two decades.
They say: "Parallel changes have taken place in many other European countries".
History repeats itself
"In all, 116 species of farmland birds - one-fifth of European avifauna - are now of conservation concern."
The researchers, all ornithologists, are from the Royal Society for the Protection of Birds, the British Trust for Ornithology, and the Department of Zoology at the University of Oxford.
But this time it is not poisoning by pesticide residues that is to blame.
Intensification of agriculture "is about making as great a proportion of primary production as possible available for human consumption. To the extent that this is achieved, the rest of nature is bound to suffer".
They identify some key changes in British farming over the last 30 years:
The researchers say most of the evidence that farming is to blame for what is happening to the birds "is by association, but in sum total it is damning".
"Annual BTO censuses of 42 species of breeding birds show that 13 species living exclusively in farmland, such as the skylark and corn bunting, declined by an average of 30% between 1968 and 1995.
"Yet 29 species of habitat generalists, such as the carrion crow and the wren, have increased by an average of 23%."
The researchers say there are agricultural schemes in the UK that could help biodiversity.
But there is "no magic bullet with which to reverse the declines of a large suite of species . . . the most general prescription is to reverse the intensification of agriculture".
Areas for research they recommend include the effects of introducing more variety into farming.
They also want an investigation of the trade-offs between conservation benefits and the profitability of farming, and of "the trade-offs (or synergies) between conservation of different taxonomic groups".
And they say genetically-modified (GM) crops may have a part to play.They want thorough and continuing evaluation of GM plants to make sure there is no risk.
"But we must also recognise a potential benefit of GM crops - to give us a wider range of options as we try to make a more sustainable future for agriculture than that created by the last green revolution."