Franšais

 

Indicators of the average population status of characteristic species (Lower Great Lakes-St Lawrence)

Line graph depicting the percent change in population size of various bird guilds in the Lower Great Lakes since 1970
Indicators of the average population status of characteristic species (Lower Great Lakes-St Lawrence)
Year All birds Forest birds Grassland birds Shrub and forest-edge species Other water birds Waterfowl Aerial insectivores Colonial waterbirds
1970 0 0 0 0 0
1971 -1.4 1.9 3.4 0.9 0 0
1972 -3 4.2 -1.4 -0.9 -0.2 -31.3
1973 -2.4 5.3 -4.9 1.9 4.3 -34 0
1974 -2.1 5.3 -9.6 1.2 7.6 -33.5 -3.8
1975 -1.9 6.8 -12 3.1 4.1 -34 -7
1976 3.2 12.1 -8.8 6 11.4 -23.8 -6.4
1977 1.8 12.9 -12.2 7 15.1 -25.9 -7.9
1978 2.5 14.5 -16.9 0.4 20 -16.7 -11.9
1979 -4.8 15.7 -21.3 -0.3 19.7 -8 -11.9
1980 1.1 16.6 -20.5 5.2 30.8 0.2 -16.2 113
1981 4.7 18.8 -21.4 3.3 36.6 5 -16.7
1982 4.7 21.7 -24.2 1.2 37.4 -23.8 -14.3
1983 9.3 25 -28.1 6.4 40.3 3.3 -18.7
1984 7.8 22.6 -32.8 3.1 39 35.7 -22
1985 9.8 23.4 -34.2 8.5 40.5 70.9 -22.2
1986 10.2 26.4 -34.7 6.7 43.4 80 -23.5
1987 8.8 25.4 -39.4 4.9 40.6 88.3 -26.2
1988 9.9 30.5 -40.6 7.1 39.2 103.6 -28.1
1989 11.4 32 -40.2 7.5 40.1 120.2 -28.8
1990 11.2 32.2 -42 10.5 38.4 135.9 -31.1 109.7
1991 11 32.4 -44.2 7.3 41.7 151.2 -31
1992 9.7 32.1 -47.2 6.3 38.5 165.7 -33.8
1993 12.4 37.1 -47 9.4 45.9 177.5 -34.6
1994 10.4 35.8 -47.6 5.1 45.4 187.9 -37
1995 12.4 35.9 -47.9 9.9 39.5 198.3 -37.6
1996 9.7 36.8 -50.9 3.4 38.6 177.9 -37.9
1997 9.8 37.6 -52.5 6.8 39.2 150.1 -39
1998 12.2 41.6 -53.5 9.8 39.3 119.9 -39.9
1999 14.2 44.9 -54.1 12.6 36.1 94.3 -41.1
2000 14.6 51.3 -55.8 11.3 40.9 88.5 -44.1 148.6
2001 13.8 51.8 -58.3 13.2 40.8 103.5 -44.7
2002 13.7 51.3 -60.2 12.4 37.4 125.8 -47.1
2003 13.9 60.8 -62 14 36.5 156.7 -48
2004 15.5 64 -63.4 15.4 38.8 176.5 -49.6
2005 15.6 65.6 -64.9 16.4 35.5 231.6 -50.7
2006 17.8 72.6 -65.2 15.3 39.7 287.1 -53.7
2007 19.5 82.8 -65.4 19.9 41.5 232.2 -54.9
2008 18.7 82.4 -65.8 16.8 51.7 205.6 -56.7
2009 21.3 87.3 -66.7 19.5 51.1 239.6 -58.8
2010 19.2 84.2 -68.5 18.3 53.4 303.7 -59

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