• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Resource Ramblings 2007-08

The Resource Management Division manages wildlife populations, especially bison, elk and prairie dogs, to ensure that forage consumption at the Park won’t result in prolonged over-utilization of vegetation resources. Towards this end, the Division maintains precipitation records, evaluates forage production and condition, and estimates wildlife populations, each year and throughout the year. The Range_Wildlife_Status_2007 spreadsheet, shown here and maintained on the WICA Shared Drive, provides a summary of recent, current and predicted conditions for available forage and wildlife populations. The information included in this spreadsheet supports decision-making at the park regarding wildlife and vegetation management. (Marie Curtin)

 
Wind Cave National Park Range/Wildlife Status, 2004-2007

July 2007

FORAGE (AUMs) AVAILABLE

2004

2005

2006

Prediction for 2007

AUMs allocated for bison and elk, April 1, 2004 through March 31, 2005 AUMs allocated for bison and elk, April 1, 2005 through March 31, 2006 AUMs allocated or bison and elk, April 1, 2006 through March 31, 2007 AUMs allocated for bison and elk, April 1, 2007 through March 31, 2008
WICA RANGE EVALUATION FIELD WORK.
Calculated with NRCS double-sampling methodology (48 transects in 2005 and 2006, 45 non-dogtown transects), and reflecting known/estimated prairie dog acres in poor range condition. Prediction for 2007 adjusted to reflect 2005 and 2006 precipitation levels (Reece et al, 1991).

8894.12

7245.09

6138.58

NRCS TECHNICAL GUIDES.
Calculations reflect known/estimated prairie dog acres in poor range condition, remaining acres 1/2 in fair condition and 1/2 in good condition, medium canopy in forest/woodland areas,
and assume average precipitation.

8184.05

8157.65

8112.65

FORAGE (AUMs) REQUIRED AUMs required Oct 1, 2003 through September 30, 2004 AUMs required Oct 1, 2004 through September 30, 2005 AUMs required Oct 1, 2005 through September 30, 2006 AUMs required Oct 1, 2006 through September 30, 2007
BISON # of Adults

350

425

330

310.00

Animal equivalent

1.2

1.2

1.2

1.20

# of months in Park

12

12

12

12.00

TOTAL AUMs FOR BISON

5040

6120

4752

4464

ELK # Year-round of Adults

475

425

430

450

Animal equivalent

0.6

0.6

0.6

0.6

# of months in Park

12

12

12

12

AUMs required

3420

3060

3096

3240

# of Wintering Adults

200

400

100

200

Animal equivalent

0.6

0.6

0.6

0.6

# of months in Park

6

6

6

6

AUMs required

720

1440

360

720

TOTAL AUMs FOR ELK

4141

4500

3456

3960

FORAGE (AUMs) REQUIRED FOR BISON & ELK

9180

10620

8208

8424

BISON CULLED or available TO BE CULLED

0

157

135

70

PRAIRIE DOG ACREAGES

~1950

2162

~2250

~2400

SUMMARY ASSESSMENT - FIELD WORK

2004

2005

2006

PREDICTION FOR 2007

AUMs allocated for bison and elk (25% of total)

8894.12

7245.09

6138.58

AUMs required for bison and elk

10620.00

8208.00

8424.00

AUMs over- or under-utilized

(1725.88)

(962.91)

(2285.42)

% Utilization (Utilization goal = 25%)

29.85%

28.32%

34.31%

SUMMARY ASSESSMENT - NRCS GUIDES
(assumes average precipitation)

2004

2005

2006

Prediction for 2007

AUMs allocated for bison and elk (25% of total)

8894.12

7245.09

6138.58

AUMs required for bison and elk

9180.00

10620.00

8208.00

8424.00

AUMs over- or under-utilized

(1725.88)

(962.91)

(2285.42)

% Utilization (Utilization goal = 25%)

29.85%

28.32%

34.31%

PRECIPITATION

2004

2005

2006

50+ year average

Growth Year Precipitation (October - September)

13.95

19.01

14.10

17.76

% of average

78.55%

107.04%

79.39%

Calendar Year Precipitation (January - December)

13.11

18.90

13.77

17.76

 

Comments and feedback about Resource Ramblings are encouraged and should be directed to Dan Foster, in person, or via email.

Did You Know?

White Penstemon

White Penstemon is the most widespread penstemon or beardtongue in the Great Plains. The insides of the blossoms are bearded and often spotted with purple. More...