local vs. large scale gradients of species diversity in birds student names removed for anonymity...
TRANSCRIPT
Local vs. Large Scale Gradients of Species Diversity in Birds
Student names removed for anonymity
BY222
Objectives
• Local, Regional, Continental comparisons– Species richness– Land coverage• Patterns
– Land use• East coast to interior Colorado
Yellow Warbler, Fishman Island, Virginia
Hypotheses
Continental:• The further East, the greater the species
richness of birds Regional• There will be a greater species richness in
birds where there is more waterLocal• There will be more species in forested areas.
Brown-Headed Cowbird Squaw Creek, Missouri
Our Measurements
Latitude: 30° N to 40°NLongitude: -75°W to -105°WField measurements: ≈3, 5 minsw/ 25, 50, 100mType: State Wildlife Management AreaData collected: Avg of up to 5yrsBreeding BirdsLocal scale: 0.82km^2Regional Scale: 52km^2
Breeding Birds Species Richness
Species Richness vs Longitude
-110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -600
2
4
6
8
10
12
14
16
18
Longitude (°)
Spec
ies R
ichne
ss
Tennessee Edger Euns
0 0.2 0.4 0.6 0.8 1 1.20
2
4
6
8
10
12
14
16
18
Local Scale (.82Km^2)
Proportion Land Use Forest
Spec
ies R
ichne
ss
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 102468
1012141618
Regional Scale (52 km^2)
Proportion Land Use Forest
Spcie
s Rich
ness
Conclusions
• Continental scale bird species increase closer to the coast
• Regional and local patterns show similar species richness