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<br /> <br />sr~zz rveriAls <br />Small marrrnals wire sampled during October-, 1979 by 100` mlive-trapping <br />transects at the Nucla :tine study area. Ccx~uuter print-outs of the <br />field and analyzed data are provided in Appendix B, Part 1 for each of the <br />three vegetation types sampled: upland sagebrush, grassland pasture , <br />and riparian. N~m;bers o£ individuals of each species captured, relative <br />abundance indices (numter of individuals captured per 100 trap nights), sex <br />and age class ratios, and Shannon-A'einer species diversity indices are pro- ' <br />vided on the print-outs. Relative abundance indices for each species and <br />Shannon-Weiner diversity indices are su-rnarized for each vegetation type in <br />Table 2. Nacrohabitat affinities as de.-wted by @ii-square values are provided <br />for each species captured in Appendix s, Part 1. <br />7tio major topics are considered in the following discussion of small manmal <br />•( trapping results. First, the relative importance of each habitat type to <br />wall matem3l. populations in the study area is discussed. Importance is <br />defined by three pararre-:.ers: species diversity, species co~osition, and <br />total small mame~l abundance. Secondly, the distribution, abundance and popu- <br />lation structure (sex ratios) are described for each species captured. <br />Small mammal habitats. The riparian habitat provides the best habitat for <br />small mammals in the J7ucla study area. Of the four species captures ~'urinq <br />small mammal investigations, western harvest :rouse Q~it}lr-odontomys miegalotis) , <br />deer arouse (Peromyscus maniculatus), meadow wle CNicrotus pennsylvanicus), <br />and house =rouse (MUS muscular) , all four were represented in sa~ciples <br />collected in the riparian type. Accordingly, the Shannon-We3nes species . <br />diversity index for riparian was the highest recorded at 1.28. Riparian vege- <br />tation also evidenced the largest population of small marcmals (8.8 individuals/ <br />100 trap nights). The meadar wle was the most abundant species and accounted <br />for over 43$ of the small mammals captured., T1^.e house mouse (2.5 individuals/ <br />100 trap nights), western harvest arouse (1.3-individuals/100 trap nights), <br />and deer arouse {1.3 individuals/100 trap nights) folla.~ed in abundance, All <br />species captured in riparian, except t`ie deer mouse, SY.n..red an of°inity Pon <br />_27_ <br />• <br />JUM 1 1 1480 <br />(Revised August 2006) Attachment 2.04.10-10-34 <br />