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Upper Midwest Environmental Sciences Center

Maps, Models, and Tools for Bird Conservation Planning

Modeling Avian Abundance: Results - Sedge Wren

Thogmartin, W. E., M. G. Knutson, and J. R. Sauer. 2006. Predicting regional abundance of rare grassland birds with a hierarchical spatial count model. Condor 108:25-46.

Modeling Avian Abundance: Results
 Avian Species-of-Concern in the Prairie-Hardwood Transition Ecoregion (Bird Conservation Region 23)

Sedge Wren
Cistothorus platensis

 

Conservation Estate Portfolio for the Sedge wren (Cistothorus platensis)

Conservation Estate Portfolio for the Sedge wren (Cistothorus platensis)

Sedge Wren Predicted Relative Abundance Map

Sedge Wren Predicted Relative Abundance Map(map - click for larger scale)

Sedge Wren

Sedge Wren

AOU Code SEWR
Habitat Association grass-wetlands
Nest Type and Location open-cup, ground/low
Migration Status Short distance
Conservation Score 23

Sedge Wren Predicted Relative Abundance Map
This map indicates predicted relative species abundance. The predicted count of any cell in the map represents the expected count if a Breeding Bird Survey route were centered on that cell.

Sedge Wren Predicted Relative Abundance Map

 

Sedge Wren Averaged Habitat Model

Explanatory Variable Scale (m) Median 95% LCL 95% UCL Variable Importance
Grassland Composition (%)
100
0.534
0.528
0.540
0.136
Total Forest Composition (%)
100
-0.455
-0.462
-0.447
0.610
Mean Temperature in January
 
-0.926
-0.951
-0.901
0.269
Mucky Soils
100
0.386
0.380
0.393
0.899
Disjunct Core Area of Wetlands
1,000
0.363
0.357
0.370
0.899
Spatial CAR
 
-1.216
-1.222
-1.210
1

K-L Best Subset Models

Model Explanatory Variable Scale Parameters DIC ΔDIC wi Evidence Ratios
1
Forest100, Mucky Soils, Disjunct Core Area of Wetlands
581.081
4454.5
0.00
0.380
1
2
Forest100, Mucky Soils, Mean Temperature in January, Disjunct Core Area of Wetlands
579.733
4454.98
0.48
0.299
1.27
3
Mucky Soils, Disjunct Core Area of Wetlands
580.853
4456.1
1.60
0.171
2.23
4
Grass100, Disjunct Core Area of Wetlands
578.908
4456.34
1.84
0.151
2.51
Null
 
581.016
4456.94
2.44
0.112
3.39
Parameters: Effective number of parameters
DIC: Deviance Information Criterion
ΔDIC: Difference in deviance between model and best model
wi: Model weight
Evidence Ratio: Ratio of model i relative to the best model
 

Sedge Wren Population Trend Graph

Sedge Wren Population Trend Graph

 


*
Partners-in-Flight Conservation score for PIF16

(171 KB .pdf file - requires Acrobat Reader)  

Scores range between 5 and 35, with higher scores signifying greater conservation concern. Each species is of management concern because of their rarity, declining abundanceMarch 21, 2007l_16sum.htm">http://www.blm.gov/wildlife/pl_16sum.htm).

Content manager: Wayne Thogmartin

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March 21, 2007