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Generalistspecies : +20%Woodlandspecies: -18%Farmlandspecies: -23%Mean Species Abundance type of Indicator
Population index (1990=100)Indicator of farmland birds in Europe(spp=23:+/- 95% CLs)150Significant decline (trend 1980-2002 = -29%)13011090701978 1982 1986 1990 1994 1998 2002YearGregory et al. Phil. Trans. R. Soc. Lond. B. (2005).
Page 3 and 4: Indicateur de biodiversitéHow many
Page 5 and 6: Back to basic: the Niche theoryG. E
Page 7 and 8: What is specialisation?(some evolut
Page 9 and 10: The basic idea :Pressureare oftenha
Page 11: Second solution (early XXI th centu
Page 15 and 16: The principle:Speciessensibility to
Page 17 and 18: The French breeding bird survey2 x
Page 19 and 20: Estimating species specialisationEx
Page 21 and 22: Thus…For each species:abundance(*
Page 23 and 24: The principle:Speciessensibility to
Page 25 and 26: Devictor et al., 2008Community Spec
Page 27 and 28: CSICSICSICSICSITemporal trends of C
Page 29 and 30: Atmospheric nitrogen deposit
Page 31 and 32: Other exemple: the marine trophic i
Page 33 and 34: A basic principle: any species is m
Page 35: Other exemple:Effect of urbanisatio
Page 38 and 39: Common butterflies, indicator ofurb

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