Year-Lo-year changes in bird species richness, logarithmic stand- 

 ard deviation (sigma), and number of species (excluding visitors, 

 migrants, and water birds) for June runs of the five roadside survey 

 routes are shown in Figures 10-12. Note that the relative positions of 

 the routes on these graphs remain fairly constant from year to year. 



SMALL MAMMAL COMMUNITY PARAMETERS 



Small mammal capture data for 1981 are summarized in Table 16. 



Figure 13 shows year-to-year changes in small mammal biomass for six 

 habitats (biomass estimates obtained for control and experimental sites 

 were averaged for combined spring and fall data). It should be noted 

 that 1977 data are not strictly comparable, since a spring-fall trapping 

 regime was not used that year. 



Figure 14 shows year-to-year changes in the spring-fall small mammal 

 biomass increase (which is related to production) for the same four 

 habitats. 



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