How Bird Atlas Data is getting used
- 1. Use of the Kerala Bird Atlas to validate analyses that use eBird Data
- 2. o Use less structured eBird data to understand range, abundance and population trends of India’s birds Objective
- 3. Biases – checklists in 20 km grids
- 4. Biases – checklists by month
- 5. o eBird data has large biases in space and time (less structured) o the Atlas provides a unique opportunity to compare statistically corrected results from non-Atlas eBird data with Atlas data that is free from spatiotemporal biases; methods can then be finalized o the previous step is essential as methods may always be open to criticism until they are validated (using the Atlas). o is inference from less structured data reliable? Problems
- 6. o Strong correlations o Use Atlas dry season data to fine tune analytical methods o Generalised Linear Mixed Models (GLMM) o p/a ~ log(no. of species) + … + 1|district/hotspot + 1|observer Calibration of analyses – eBird vs. Kerala Atlas
- 7. Calibration of analyses – eBird vs. Kerala Atlas
- 8. o the ability to validate methods using structured Atlas data may provide us with the analytical template to make a first assessment of the State of India’s Birds. Validation