Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Using Paleobiodiversity Databases for
Landcover Reconstruction
Scott Farley
University of Wisconsin, Madison
sfarley2@wisc...
Paleobiodiversity Databases
Community efforts to collect, structure, store, and share occurrence data
...what was it?
...w...
Paleobiology Database Neotoma
Paleobiodiversity Databases
Community efforts to collect, structure, store, and share occurrence data
...what was it?
...w...
Paleobiodiversity Databases
Not just the data...
Software ecosystems:
data services (JSON, CSV)
language bindings (python ...
Paleobiodiversity Databases
Not just the data…
Makes modeling easy
Reconstructing paleo-landcover
Spatially continuous patterns of past terrestrial vegetation
Reconstructing paleo-landcover
Spatially continuous patterns of past terrestrial vegetation
Why?
- Ecological niche models...
Reconstructing paleo-landcover
Spatially continuous patterns of past terrestrial vegetation
Why?
- Ecological niche models...
What we want
Spatially continuous patterns of
terrestrial vegetation
Photo: NASA
Spatially continuous patterns of past terrestrial vegetation
What we have
Spatiotemporally discrete records
of local landc...
Potential Approaches
- Expert Interpretation / Assumptions
Potential Approaches
- Expert Interpretation / Assumptions
- Spatial Interpolation
Potential Approaches
- Expert Interpretation / Assumptions
- Spatial Interpolation
- Statistical Modeling / Machine Learni...
In the past...
… vegetation cover is not observable (latent)
In the past...
… vegetation cover is not observable (latent)
but,
… pollen is.
Today...
We can observe both cover
MODIS/Landsat/AVHRR
Photo:NASA
Today...
We can observe both cover and pollen.
MODIS/Landsat/AVHRR Modern Pollen Surface Samples
Photo:NASA
Photo:Wikimedi...
Calibration with modern data
Approximate the functional relationship between modern pollen spectra and modern
land cover
M...
Percent tree pollen
Percenttreecover Modern pollen collection site
Percent tree pollen
Percenttreecover Modern pollen collection site
Estimated relationship
Apply relationship to fossil pollen records
Paleo-occurrence records
Figure: Paleon Project
Apply relationship to fossil pollen records
Continuous estimates of paleo-landcover
Calibrated model
Figure: Paleon Project
Project Deliverables
Figure: Paleon Project
Estimate:
% Tree Cover
% Broadleaf
% Needleleaf
Project Deliverables
Figure: Paleon Project
Estimate:
% Tree Cover
% Broadleaf
% Needleleaf
Spatial Extent: North America
...
Project Deliverables
Figure: Paleon Project
Estimate:
% Tree Cover
% Broadleaf
% Needleleaf
Spatial Extent: North America
...
Thank you!
Upcoming SlideShare
Loading in …5
×

Using paleobiodiversity databases to reconstruct past land cover

39 views

Published on

Digital Data in Paleontological Research
Berkeley, CA
March 28, 2017
Scott Farley

Published in: Science
  • Be the first to comment

  • Be the first to like this

Using paleobiodiversity databases to reconstruct past land cover

  1. 1. Using Paleobiodiversity Databases for Landcover Reconstruction Scott Farley University of Wisconsin, Madison sfarley2@wisc.edu Digital Data in Paleontology Berkeley, CA March 28, 2017
  2. 2. Paleobiodiversity Databases Community efforts to collect, structure, store, and share occurrence data ...what was it? ...when was it? ...where was it?
  3. 3. Paleobiology Database Neotoma
  4. 4. Paleobiodiversity Databases Community efforts to collect, structure, store, and share occurrence data ...what was it? ...when was it? ...where was it? { "TaxonName": "Smilodon", "VariableElement": "bone/tooth", "Value": 1.0, "SampleAgeYounger": 22945.0, "SampleAgeOlder": 23570.0, "SampleAge": 23257.0, "SiteLongitudeWest": -117.029166666667, "SiteLatitudeSouth": 33.5138888888889, "SiteLatitudeNorth": 33.5138888888889, "SiteLongitudeEast": -117.029166666667, } Example: Smilodon Record from Neotoma
  5. 5. Paleobiodiversity Databases Not just the data... Software ecosystems: data services (JSON, CSV) language bindings (python libraries, R packages) Community Support
  6. 6. Paleobiodiversity Databases Not just the data… Makes modeling easy
  7. 7. Reconstructing paleo-landcover Spatially continuous patterns of past terrestrial vegetation
  8. 8. Reconstructing paleo-landcover Spatially continuous patterns of past terrestrial vegetation Why? - Ecological niche models - Global climate model vegetation modules - Land-atmosphere feedbacks - Early human land use Photo:CarltonUniversity
  9. 9. Reconstructing paleo-landcover Spatially continuous patterns of past terrestrial vegetation Why? - Ecological niche models - Global climate model vegetation modules - Land-atmosphere feedbacks - Early human land use Since last glacial maximum (22kya)
  10. 10. What we want Spatially continuous patterns of terrestrial vegetation Photo: NASA
  11. 11. Spatially continuous patterns of past terrestrial vegetation What we have Spatiotemporally discrete records of local landcover signal Figure:NeotomaDatabase
  12. 12. Potential Approaches - Expert Interpretation / Assumptions
  13. 13. Potential Approaches - Expert Interpretation / Assumptions - Spatial Interpolation
  14. 14. Potential Approaches - Expert Interpretation / Assumptions - Spatial Interpolation - Statistical Modeling / Machine Learning
  15. 15. In the past... … vegetation cover is not observable (latent)
  16. 16. In the past... … vegetation cover is not observable (latent) but, … pollen is.
  17. 17. Today... We can observe both cover MODIS/Landsat/AVHRR Photo:NASA
  18. 18. Today... We can observe both cover and pollen. MODIS/Landsat/AVHRR Modern Pollen Surface Samples Photo:NASA Photo:WikimediaCommons
  19. 19. Calibration with modern data Approximate the functional relationship between modern pollen spectra and modern land cover Modern Pollen Data Remotely Sensed Landcover Hierarchical Bayesian Model
  20. 20. Percent tree pollen Percenttreecover Modern pollen collection site
  21. 21. Percent tree pollen Percenttreecover Modern pollen collection site Estimated relationship
  22. 22. Apply relationship to fossil pollen records Paleo-occurrence records Figure: Paleon Project
  23. 23. Apply relationship to fossil pollen records Continuous estimates of paleo-landcover Calibrated model Figure: Paleon Project
  24. 24. Project Deliverables Figure: Paleon Project Estimate: % Tree Cover % Broadleaf % Needleleaf
  25. 25. Project Deliverables Figure: Paleon Project Estimate: % Tree Cover % Broadleaf % Needleleaf Spatial Extent: North America Spatial Resolution: 800m Temporal Extent: 22,000 years (LGM) Temporal Resolution: 500 years
  26. 26. Project Deliverables Figure: Paleon Project Estimate: % Tree Cover % Broadleaf % Needleleaf Spatial Extent: North America Spatial Resolution: 800m Temporal Extent: 22,000 years (LGM) Temporal Resolution: 500 years Share gridded data-based reconstructions via GitHub for downstream consumption.
  27. 27. Thank you!

×