17.11.2012 Views

Vascular Plant and Vertebrate Inventory of Saguaro ... - USGS

Vascular Plant and Vertebrate Inventory of Saguaro ... - USGS

Vascular Plant and Vertebrate Inventory of Saguaro ... - USGS

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Table 4.8. Relative abundance (mean + SE; no./10 hrs) <strong>of</strong> herpet<strong>of</strong>auna detected during extensive surveys<br />

(n = 85), by elevation strata, <strong>Saguaro</strong> National Park, Rincon Mountain District, 2001 <strong>and</strong> 2002. Parenthetical<br />

numbers are sample sizes for number <strong>of</strong> survey areas.<br />

Low (n = 50)<br />

Elevation stratum<br />

Middle (n = 23) High (n = 12)<br />

All (n = 85)<br />

Species mean SE mean SE mean SE mean SE<br />

Couch’s spadefoot 1.36 1.06 0.80 0.63<br />

Sonoran Desert toad 4.97 2.19 2.92 1.31<br />

red-spotted toad 1.90 0.86 0.10 0.10 1.13 0.52<br />

canyon treefrog 2.50 0.53 11.15 5.83 4.29 3.28 5.10 1.69<br />

lowl<strong>and</strong> leopard frog 1.80 1.04 0.33 0.33 1.15 0.62<br />

Sonoran mud turtle 0.91 0.42 0.84 0.48 0.76 0.28<br />

desert tortoise 0.53 0.20 0.35 0.26 0.41 0.14<br />

western b<strong>and</strong>ed gecko 0.39 0.15 0.23 0.09<br />

eastern collared lizard 0.10 0.07 0.26 0.26 0.13 0.08<br />

lesser earless lizard 0.10 0.08 0.06 0.05<br />

greater earless lizard 1.43 0.35 0.35 0.26 0.94 0.23<br />

zebra-tailed lizard 2.29 1.14 1.35 0.68<br />

desert spiny lizard 0.87 0.27 0.51 0.17<br />

Clark’s spiny lizard 4.59 0.87 3.41 1.27 0.33 0.33 3.67 0.63<br />

eastern fence lizard 4.16 1.54 6.20 2.37 2.00 0.59<br />

common side-blotched lizard 3.94 1.22 2.32 0.75<br />

ornate tree lizard 10.03 2.61 10.47 2.33 1.65 0.95 8.96 1.69<br />

greater short-horned lizard 0.44 0.30 0.06 0.04<br />

regal horned lizard 0.15 0.11 0.09 0.06<br />

Great Plains skink 0.04 0.04 0.02 0.02<br />

unknown whiptail 1.25 0.48 1.08 0.39 1.03 0.30<br />

Sonoran spotted whiptail 3.40 1.40 1.38 0.61 2.37 0.85<br />

Gila spotted whiptail 0.26 0.13 1.36 0.92 0.42 0.28 0.58 0.26<br />

western whiptail 1.44 0.68 0.84 0.41<br />

Madrean alligator lizard 0.03 0.03 0.52 0.37 0.08 0.05<br />

Gila monster 0.57 0.25 0.33 0.15<br />

coachwhip 0.21 0.12 0.12 0.07<br />

Sonoran whipsnake 0.15 0.08 0.17 0.17 0.13 0.07<br />

western patch-nosed snake 0.04 0.04 0.02 0.02<br />

mountain patch-nosed snake 0.04 0.04 0.02 0.02<br />

gopher snake 0.07 0.05 0.11 0.11 0.06 0.03<br />

common kingsnake 0.02 0.02 0.01 0.01<br />

Sonoran mountain kingsnake 0.08 0.08 0.33 0.33 0.07 0.05<br />

long-nosed snake 0.08 0.05 0.05 0.03<br />

black-necked garter snake 2.85 1.38 1.77 0.76 0.19 0.19 2.18 0.84<br />

Sonoran coral snake 0.03 0.03 0.02 0.02<br />

western diamond-backed rattlesnake 1.62 0.41 0.95 0.26<br />

black-tailed rattlesnake 0.23 0.12 0.64 0.29 0.32 0.32 0.36 0.12<br />

tiger rattlesnake 0.62 0.22 0.36 0.14<br />

western rattlesnake 0.03 0.03 0.56 0.24 0.77 0.66 0.28 0.12<br />

all individuals 53.73 6.05 39.80 7.69 15.89 4.22 44.62 4.37<br />

species richness 34.00 18.00 13.00 39.00<br />

did vary for lizards (F 2,47 = 14.6, P < 0.0001,<br />

ANOVA), with 2.3 times more species detected<br />

during day (4.8 ± 0.4) than other periods.<br />

Relative abundance <strong>of</strong> amphibians<br />

increased by 1.2 ± 0.6 individuals/10 hours with<br />

each 10% increase in cloud cover after adjusting<br />

37<br />

for the influence <strong>of</strong> survey time (t 79 = 1.96, P =<br />

0.054, test <strong>of</strong> slope from regression). In contrast,<br />

relative abundance <strong>of</strong> lizards decreased by 2.2 ±<br />

0.7 individuals/10 hours with each 10% increase<br />

in cloud cover after adjusting for survey time <strong>and</strong><br />

elevation (t 77 = 3.21, P = 0.0019) but did not vary

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!