Data from McCuen (1985) Macroinvertebrate diversity for altered streams  
Each observation is a stream site. X1 avg stream depth (cm), X2 stream depth range(cm)
X3 avg stream width (cm), X4 years since channel work, X5 drainage area (acres),
X6 total taxa, X7 benthic taxa, X8 Shannon-Weaver diversity index

     'ID'     'X1'   'X2'  'X3'    'X4'  'X5'    'X6'   'X7'  'X8'
     '1'      10.2     5.  548.6     1.   3970.   33.    15.  2.584
     '2'      19.4     9.  794.0     6.  10687.   22.    10.  2.486
     '3'      19.2    11.  503.8    30.   6400.   45.    21.  3.456
     '4'      22.9    17.  213.4    30.   3648.   37.    19.  4.093
     '5'      23.9    15.  350.5     2.   1298.   35.    19.  3.720
     '6'      10.7     9.  182.9     1.    622.   48.    35.  3.871
     '7'      24.8    25.  476.6    17.   2816.   47.    34.  3.658
     '8'      11.4     6.  362.7     1.   2703.   24.     9.  2.125
     '9'       8.9     4.  164.6    20.    448.   18.    10.  2.702
    '10'      41.7    43.  432.8    20.   2048.   17.    10.  3.180
    '11'      19.6    19.  377.9    17.   4032.   40.    18.  2.996
    '12'       4.8     4.  195.1    30.   2270.   34.    18.  2.976
    '13'      27.9    28. 1067.0     5.  28080.   28.    11.  3.697
    '14'       4.8     4.  155.2    30.   2112.   24.    11.  2.714
    '15'      16.2    14.  231.6    30.   1664.   30.    24.  3.914
    '16'      15.4    13.  240.8    30.   1856.   36.    30.  3.058
    '17'      38.1    14.   96.5    12.   2359.   36.    22.  3.609
    '18'      26.7    16.  420.6     7.   4570.   29.    14.  3.596
    '19'      11.2     9.  224.3    30.   3000.   24.    13.  3.304
    '20'      13.6     9.  302.0    24.    800.   16.    11.  3.183
    '21'      13.9    14.  232.8     1.    735.   26.    12.  3.604
    '22'       5.4     5.  466.3    17.   2249.   16.     5.  1.790
    '23'      17.8     9.  269.2    17.    109.   14.     6.  2.742
    '24'       9.5     4.  237.7    15.    753.   30.     6.  0.982
    '25'      23.2    18.  223.5    30.   2600.   36.    19.  3.553
    '26'      59.2    30.  537.6     6.   1540.   21.     9.  2.673
