a model for predicting bird abundance
DESCRIPTION
A Model for Predicting Bird Abundance. Adaptive Management Bank Rehabilitation Site Design Effectiveness Monitoring -- Meeting Program Objectives?. OBJECTIVES. Use Bird abundance patterns and Riparian characteristics - PowerPoint PPT PresentationTRANSCRIPT
A Model for Predicting Bird Abundance
•Adaptive Management
•Bank Rehabilitation Site Design
•Effectiveness Monitoring
-- Meeting Program Objectives?
OBJECTIVES
• Use Bird abundance patterns and Riparian characteristics
• Predict bird abundance following construction and as riparian habitat develops
-- Rehabilitation sites -- Program area
Unit t+1
Study areaRehab siteReach
Unit t
Study areaRehab siteReach
Habitat Arrangement
Hydrograph tHydrograph t+1
RestorationVeg metricst+1
Veg Class / Association
Veg metrics t
Veg Class / Association
Bird metrics t+1
Abundance Density Productivity
Bird metrics t
Abundance Density Productivity
Bird Behavior
Timing
Flow level
Area of Disturbance
Heterogeneity
Wildlife Model For Bird Response
Riparian removal
Side channel formation
Replanting
Time
I II III
ConstructionDisturbance
Emmigration
Food availability
Flow level
Riparian Mapping and Inventory
McBain and Trush, Redwood Sciences Laboratory
Most Abundant Vegetation Types used for Regression Tree Model
• White Alder
• Narrowleaf Willow
• Mixed Willow
• Black Cottonwood
• Mixed conifer – White Oak
• Himalaya Berry
• Calif. Grape
• Canyon Live Oak
• Grasses
Variables for our Regression Tree Example
• Vegetation Type
• River Mile
• Patch Size
• Vegetation Type within
200 m of each Survey Station
|0.95
0.49
0.13 0.63
1.08
0.82
0.97
0.78 1.30
0.63
1.30
1.17
2.10 1.10
1.20
1.30 0.40
0.72
0.07 1.10
1.62
2.00 1.30
YELLOW WARBLER
White Alder- Narrow Willow- Black Cottonwood-
Vegetation Type
Willow-Oak-Pines n=243n=67
Veg. Type
River Mile> 89n=128n=115
River Mile < 89
River Mi.< 83
Patch Size
< .07 >
River Mi.> 83 River Mi. >
105River Mi. < 105
< 108 > River Mi.
River Mi.> 90
River Mi.<90
Various Veg. Types
Predicting Yellow Warbler Abundance
0101L White Alder 111.7 1.32 0.1780102R FoothillPine-WO 111.7 0.62 0.0680104L Narrowleaf Willow 111.6 1.32 0.1780105R Mixed Conifer -WO 111.3 1.32 0.1780106L White Alder 111.2 1.32 0.178HOFL13 Narrowleaf Willow 78.1 1.26 0.096VAGU1 White Alder 75.6 0.78 0.111VAGU4 Tree of Heaven 75.3 0.13 0.178VAGU5 Narrowleaf Willow 74.8 0.78 0.111
Patch Veg. Assoc. RvrMi Pred x SE
Predicted Mean/ Survey Area = Density;
Density X Patch Area =Predicted Number of YWAR
Total Predicted Number for All Patches = Estimated Population
How Many Yellow Warblers
in the Study Area?
|1.30
0.71 1.40
1.20
1.14
0.92 1.30
1.50
0.77 1.60
0.90
1.80
1.60
1.60
1.80
2.40 1.70
0.90 1.90
1.40
1.20 1.80
2.50
SONG SPARROW
n=37 n=274
Vegetation Type
White Alder- Narrow Willow- Black Cottonwood-
River Mile
Willow-Oak-Pines
River Mile < 90
River Mile> 90
Veg. Type River Mile
Patch Size
Patch Size
Various Vegetation Types