Laserfiche WebLink
<br />slarr•r• ruar~.s <br />Small mamnal~ oere samuled during October, 1979 by 100` mlive--trapping <br />transects at the Nucla Nine study area. Computer printr~uts of the <br />field and analyzed data are provided in Appendix B, Part 1 for each of the <br />three vegetation types sanpled: upland sagebrush, grassland pasture , <br />and riparian. Numbers of individuals of each species captured, relative <br />aburr3ance indices (number of individuals captured per 100 trap nights), sex <br />and age class ratios, and Shannon-~v'einer species diversity indices are pro- <br />vided on the print-outs. Relative abundance indices for each species and <br />Shannnn-Weiner diversity indices are summarized for each vegetation type in <br />Table 2. Alacrohabitat affinities as denoted by Chi-square values are provided <br />for each species captured in Appendix B, Part 1. <br />Tt~o major topics are considered in the following discussion o£ small mammal <br />• trapping results. First, the relative in~ortance of each habitat type to <br />small mamma.! populations in the study area is discussed. Importance is <br />defined by three param..ers: species diversity, species wmposition, and <br />total small manna! 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 />wall mammals in t`~e Nucla study area. Of the four species captures curing <br />small mammal investigations, western harvest mouse (Rei+hrodontomys mecjalotis), <br />deer rrouse (PezYx[yscus maniculatus), meadow wle Q~licrotus pennsylvanicus), <br />and !Huse rmuse (A7us musculus), all four ware represented in samples <br />collected in the riparian type. Accordingly, the Shannon-Weiner species <br />diversity index for riparian was the highest recorded at 1.28. Riparian vege- <br />tation also evidenced t'~e largest population of small mammals (8.8 individuals/ <br />100 trap nights). The meadow wle was the mast abundant species and accounted <br />for over 438 of the small mammals captured. Tne house mouse (2.5 individuals/ <br />100 trap niyhts), western harvest mouse (1.3 individuals/100 tr,~p nights), <br />• and deer mouse (1.3 individuals/100 trap nights) follower; in abundance. A11 <br />species captured in riparian, except t'~e deer rrouse, s;.owed an af`ir,ity for <br />_27_ <br />~uM s s Soso <br />