1997-06-13_REPORT - M1981302 ‎(15)‎

• Permit No: M1981302
• IBM Index Class Name: Report
• Doc Date: 6/13/1997
• Doc Name: EXHIBIT A 11 STATUS OF MEADOW JUMPING MOUSE FINAL REPORT
• Media Type: D
• Archive: No

captures is greater. VanVleet (Week 2), Transact A, 9.4%, B, 3.7%; Gebhard B, 7.8%;
Kenosha Ponds, 16.7%; Hedgecock-Neuhauser E, 6.7%; Culver/Ertl II, F, 4.5%
Evenness diversity by transact ranges from 1.000 on a number of transacts to a high of
about 7.5 (Transact A, Hedgecock-Neuhauser Parcel). (Note that a value of 1.000
indicates that all captures were of one species; a value of 0.000 indicates no captures
on a particular transact.) Overall evenness by parcel ranged from a low of about 1.2
(Dawson/Doniphan) to nearly 4 (Culver/Ertl ll).
One-way ANOVA comparing evenness diversity per transact across transacts was
statistically significant (F= 2.4307, p = 0.0073). Therefore Students t-tests were run to
compare evenness diversity on each pair of study sties. Results are indicated in Table
6 as p-values and significance is indicated (n.s. = not significant; ` < 0.05, " < 0.01,
< 0.001). There is wide variation in evenness diversity among study sites. Greatest
diversity of small mammals was on the Gebhard, Kaufman, and Culver-Ertl II parcels.
Lowest diversity was measured on the Dawson/Doniphan, Flatirons, Kenosha Ponds,
East Varra, and Tracy Collins parcels.
Given the frequent observation of seasonal changes in populations of small mammals,
one might imagine that species diversity would change through the season. Spearman
Rank-order Correlation of overall diversity (Table 5) by week was not significant,
however (R = 0.2714, p = 0.3278).
These data are deserving of considerably deeper analysis, but for the moment we
consider only relationships between evenness diversity and captures of meadow
jumping mice. Overall evenness diversity on sites with and without captures of Z
hudsonius was not statistically significant (t= -0.8302, p = 0.2337).
In addition to species diversity, the simple presence and relative abundance of
particular species (such as M. musculus and especially R. norvegicus) is suggestive of
the degree of human disturbance, and the relative abundance of P. manicu/atus (which
has frequently been described as a "mammalian weed"—see Fitzgerald at al., 1994)
can indicate site quality under some circumstances. As a matter of potential interest,
note in Table 3 that house mice and Norway rats accounted for more than 92% of
captures on the Flatirons Parcel (which also appeared to be the study site most
impacted by humans, as judged from qualitative inspection of vegetation). Also, the
sum of captures of deer mouse and house mice accounted for more than 90% of
individual small mammals captured at four sites: Kenosha Ponds, Dawson/Doniphan,
East Varra, and Tracy Collins (Week 6). Figure 1 illustrates the predominance of P.
maniculatus (white bars) on most transacts. Black bars indicate the relative proportion
of Z hudsonius.
Temporal Pattern of Capture.—Table 7 indicates day of capture of jumping mice within
particular trapping periods. Mean date of capture was 3.3 of the 4-day trapping period.
The apparent bias toward days later in a particular trapping session (week) is highly
significant pooled across sites (overall Chi-square, 44.0, of= 11, p <0.001). Chi-square
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