Vascular Plant and Vertebrate Inventory of Saguaro ... - USGS
Vascular Plant and Vertebrate Inventory of Saguaro ... - USGS
Vascular Plant and Vertebrate Inventory of Saguaro ... - USGS
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Cumulative number <strong>of</strong> species<br />
Cumulative number <strong>of</strong> species<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0 5 10 15 20 25 30<br />
25<br />
20<br />
15<br />
10<br />
seems unlikely in the case <strong>of</strong> the Virginia<br />
opossum, which has been extending its range<br />
northward; the record from this study represents<br />
a significant range extension (Babb et al. 2004).<br />
The red bat <strong>and</strong> fulvous harvest mouse were both<br />
found only along Rincon Creek, in the expansion<br />
area that was added to <strong>Saguaro</strong> National Park<br />
during the 1990s. The red bat is a riparian<br />
obligate species <strong>and</strong> may occur in the district only<br />
in this area. Less is known about the fulvous<br />
Sample period<br />
Sample period<br />
harvest mouse, but the finding <strong>of</strong> this species in<br />
the district is noteworthy.<br />
Additional inventory work could also<br />
increase the number <strong>of</strong> bat species detected. In<br />
total, 18 bat species have been confirmed for the<br />
Rincon Mountain District. Ronnie Sidner, who<br />
collected data for this effort <strong>and</strong> is a regional<br />
expert on the distribution <strong>and</strong> ecology <strong>of</strong> bats,<br />
believes that an additional four species could be<br />
found with additional survey effort: California<br />
83<br />
Middle Elevation<br />
High Elevation<br />
Low elevation<br />
5<br />
0 10 20 30 40<br />
Figure 6.11. Species accumulation curve for infrared-triggered cameras, <strong>Saguaro</strong> National Park,<br />
Rincon Mountain District, 1999-2005. Each sample period for the low‑elevation stratum represents a<br />
r<strong>and</strong>omized combination <strong>of</strong> 50 observations. Each sample period for medium‑ <strong>and</strong> high‑elevation strata<br />
represents 20 observations.