Leonardo Calle, Ph.D.

Ecology · Numerical & Mathematical Modeling · Dynamical Systems

leo@leonardo-calle.com | leonardo-calle.com | github.com/lcalle | Missoula, MT

EDUCATION

Ph.D. Ecology & Environmental Sciences — Montana State University, Bozeman, MT (2014–2019); NASA Earth and Space Science Fellow
M.S. Environmental Sciences & GIS Certificate — Florida Atlantic University, Boca Raton, FL (2012–2014)
B.S. Biological Sciences — Florida Atlantic University, Boca Raton, FL (2006–2010)

TEACHING

COMPUTER PROFICIENCIES

AI Modeling

  • Python / PyTorch, TensorFlow, Keras, JAX
  • LSTM, deep neural networks, transformers; YOLO object detection
  • Model development, training, and fine-tuning on GPU clusters
  • Physics-informed neural networks, process-model emulation

Statistics

  • Bayesian hierarchical models (WinBUGS, JAX), GLMs/GAMs with random effects
  • Resource selection functions, stochastic simulation, sensitivity and uncertainty analysis

Computer Programming

  • C, C++, Fortran, Python, R, SQL, Bash, VBA, C# (.NET)

Code Management, DevOps & CI/CD

  • GitHub, GitLab, Docker, pytest
  • Buddy CI/CD, JIRA / Confluence

Earth System & Hydrologic Modeling

  • Global biogeochemical cycles (LPJ DGVM, DNDC)
  • Tidal inundation, sea level rise, and coastal flood risk
  • Landscape hydrology, soil moisture, atmospheric transport
  • Global greenhouse gas simulations

High-Performance Computing

  • AWS, NASA Discover, NSF Frontera / Stampede clusters
  • Slurm (Linux / Unix) environments
  • Python: NumPy, SciPy, pandas, Dask, xarray
  • R: foreach, parallel, openmpi, fst

Data Types & Volumes

  • Terabyte-scale data processing and model integration
  • Satellite data, imaging spectroscopy (EMIT), spaceborne LiDAR (GEDI)
  • Climate data (CMIP5/6, ERA5, Daymet, PRISM); NOAA and USGS observations
  • Drone imagery and in-situ water-level loggers

Statistical Software & GIS

  • R, Python, WinBUGS, SAS
  • QGIS / GDAL, ArcGIS, Google Earth Engine

AWARDS, FELLOWSHIPS & GRANTS

Proposals submitted (not funded): NASA ROSES 2023, “Eyes on ecosystem demography and post-disturbance forest recovery using OCO (XCO2, SIF) with support from ISS sensors”; NASA ROSES 2023, “Scaling EMIT imaging spectroscopy data to improve global ecosystem modeling”

PROFESSIONAL EXPERIENCE

Research Scientist (part-time)
Harte Research Institute, Texas A&M Corpus Christi
Oct 2025 – present
Founder and Principal
CalleEcology Inc. (environmental consulting and data science) and mewmewmew, Inc.
Mar 2024 – present
Assistant Research Scientist
UMD-ESSIC/NASA-GSFC
Jan 2023 – Mar 2024
Senior Scientist, Lead Model Developer
Regrow Ag, Inc.
Jul 2021 – Dec 2022
Assistant Research Scientist
University of Maryland ESSIC
Apr 2021 – Jul 2021
Post-doctoral Researcher
University of Montana
Apr 2019 – Feb 2021
Graduate Research (PhD)
Montana State University
Aug 2014 – May 2019
Committee Chair: Benjamin Poulter (NASA-GSFC)
Primary Research Investigator
Florida Atlantic University (FAU)
Jan 2014 – May 2014
Graduate Research Assistant (MSc)
FAU
Jan 2012 – May 2014
Committee Chair: Dale E. Gawlik (FAU)
Research Assistant
FAU
Dec 2010 – Dec 2011
Field Technician, Avian Ecology Laboratory
FAU
Dec 2010 – Jun 2011
Research Assistant
FAU
Jun 2010 – Dec 2010
Founder: Citizen Science and Undergraduate Research Conservation Program
FAU
Aug 2009 – Jun 2011
Undergraduate Research, National Science Foundation
FAU
Aug 2009 – Dec 2009
Paleoecology Internship
South Florida Water Management District
May 2009 – Aug 2009
Data Analyst
Avian Ecology Laboratory
Sept 2008
Field Technician, Avian Ecology Laboratory
FAU
Feb 2008 – Jun 2008

PUBLICATIONS

  1. L. Calle (2026), in review at Ecological Complexity. Ecosystems as Information Geometries: A Topological Framework for Driver-Importance Dynamics.
  2. L. Calle and D. E. Gawlik (2026), in review at Ecology Letters. Time as habitat: a hidden axis of ecosystem reorganization during sea level rise.
  3. M. Feng, J. O. Sexton, P. Wang, P. M. Montesano, L. Calle, N. Carvalhais, B. Poulter, M. J. Macander, M. A. Wulder, M. Wooten, W. Wagner, A. Elders, S. Channan, and C. S. R. Neigh. (2025). Northward shift of boreal tree cover confirmed by satellite record. EGUsphere. doi:10.5194/egusphere-2025-2268
  4. C. S. R. Neigh, P. M. Montesano, J. O. Sexton, M. Wooten, W. Wagner, M. Feng, L. Calle, and M. L. Carroll. (2025). Russian forests show strong potential for young forest growth. Communications Earth & Environment. doi:10.1038/s43247-025-02006-9
  5. J. M. Bruening, R. O. Dubayah, N. Pederson, B. Poulter, and L. Calle. (2024). Definition criteria determine the success of old-growth mapping. Ecological Indicators. doi:10.1016/j.ecolind.2024.111709
  6. B. Poulter, B. Currey, L. Calle, A. N. Shiklomanov, C. H. Amaral, E. N. J. Brookshire, P. Campbell, K. Cawse-Nicholson, F. Huemmrich, C. E. Miller, K. Miner, Z. Pierrat, A. M. Raiho, D. Schimel, S. Serbin, W. K. Smith, N. Stavros, J. Stutz, P. Townsend, D. R. Thompson, and Z. Zhang. (2023). Simulating global dynamic surface reflectances for imaging spectroscopy spaceborne missions: LPJ-PROSAIL. JGR-Biogeosciences. doi:10.1029/2022JG006935
  7. M. T. Martinez, L. Calle, D. E. Gawlik, and S. Romañach. (2022). Evaluating temporal and spatial transferability of a tidal inundation model for foraging waterbirds. Ecosphere. doi:10.1002/ecs2.4030
  8. L. Calle and B. Poulter. (2021). Ecosystem age-class dynamics and distribution in the LPJ-wsl v2.0 global ecosystem model. Geoscientific Model Development. doi:10.5194/gmd-14-2575-2021
  9. J. P. Scholl, L. Calle, N. Miller, and D. L. Venable. (2020). Offspring polymorphism and bet hedging: a large-scale phylogenetic analysis. Ecology Letters. doi:10.1111/ele.13522
  10. B. B. Tumolo, L. Calle, H. Anderson, M. Briggs, S. Carlson, M. MacDonald, H. Reinert, and L. K. Albertson. (2020). Toward spatio-temporal delineation of positive interactions in ecology. Ecology and Evolution. doi:10.1002/ece3.6616
  11. M. Kondo, P. K. Patra, S. Sitch, P. Friedlingstein, B. Poulter, F. Chevallier, P. Ciais, J. G. Canadell, A. Bastos, R. Lauerwald, L. Calle, K. Ichii, P. Anthoni, A. Arneth, V. Haverd, A. K. Jain, E. Kato, M. Kautz, R. M. Law, S. Lienert, D. Lombardozzi, T. Maki, T. Nakamura, P. Peylin, C. Rödenbeck, R. Zhuravlev, T. Saeki, H. Tian, D. Zhu, and T. Ziehn. (2020). State of the science in reconciling top-down and bottom-up approaches for terrestrial CO2 budget. Global Change Biology. doi:10.1111/gcb.14917
  12. T. A. M. Pugh, M. Lindeskog, B. Smith, B. Poulter, A. Arneth, V. Haverd, and L. Calle. (2019). Role of forest regrowth in global carbon sink dynamics. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.1810512116
  13. K. C. Heim, T. E. McMahon, L. Calle, M. S. Wipfli, and J. A. Falke. (2019). A general model of temporary aquatic habitat use: Water phenology as a life history filter. Fish and Fisheries. doi:10.1111/faf.12386
  14. L. Calle, B. Poulter, and P. K. Patra. (2019). A segmentation algorithm for characterizing rise and fall segments in seasonal cycles: an application to XCO2 to estimate benchmarks and assess model bias. Atmospheric Measurement Techniques. doi:10.5194/amt-12-2611-2019
  15. L. Calle, L. Green, A. Strong, and D. E. Gawlik. (2018). Time-integrated habitat availability is a resource attribute that informs patterns of use in intertidal areas. Ecological Monographs. doi:10.1002/ecm.1305
  16. Z. Zhang, N. E. Zimmermann, L. Calle, G. Hurtt, A. Chatterjee, and B. Poulter. (2018). Enhanced response of global wetland methane emissions to recent El Niño-Southern Oscillation events. Environmental Research Letters. doi:10.1088/1748-9326/aac939
  17. M. Kondo, K. Ichii, P. K. Patra, B. Poulter, L. Calle, C. Koven, T. A. M. Pugh, E. Kato, A. Harper, S. Zaehle, and A. Wiltshire. (2018). Plant regrowth as a driver of recent enhancement of terrestrial CO2 uptake. Geophysical Research Letters. doi:10.1029/2018GL077633
  18. M. Kondo, K. Ichii, P. K. Patra, J. G. Canadell, B. Poulter, L. Calle, T. Saeki, N. Saigusa, S. Sitch, P. Friedlingstein, A. Arneth, A. Harper, A. K. Jain, E. Kato, C. Koven, F. Li, T. A. M. Pugh, S. Zaehle, A. Wiltshire, F. Chevallier, T. Maki, T. Nakamura, Y. Niwa, and C. Rödenbeck. (2018). Land use change and El Niño-Southern Oscillation drive decadal carbon balance shifts in Southeast Asia. Nature Communications. doi:10.1038/s41467-018-03374-x
  19. W. D. Hansen, J. P. Scholl, A. E. Sorensen, K. E. Fisher, J. A. Klassen, L. Calle, G. S. Kandlikar, N. Kortessis, D. Kucera, D. E. Marias, D. L. Narango, K. R. O’Keeffe, W. Recart, E. Ridolfi, and M. E. Shea. (2018). Student reflections on careers and culture of 21st century ecology. Ecosphere 9(2)
  20. J. Zscheischler, M. D. Mahecha, V. Avitabile, L. Calle, N. Carvalhais, P. Ciais, F. Gans, N. Gruber, J. Hartmann, M. Herold, K. Ichii, M. Jung, P. Landschützer, G. G. Laruelle, R. Lauerwald, D. Papale, P. Peylin, B. Poulter, D. Ray, P. Regnier, C. Rödenbeck, et al. (2017). Reviews and Syntheses: An empirical spatiotemporal description of the global surface-atmosphere carbon fluxes: opportunities and data limitations. Biogeosciences 14:3685
  21. A. Arneth, S. Sitch, J. Pongratz, B. D. Stocker, P. Ciais, B. Poulter, A. D. Bayer, A. Bondeau, L. Calle, L. Chini, T. Gasser, M. Fader, P. Friedlingstein, E. Kato, W. Li, M. Lindeskog, J. E. M. S. Nabel, T. A. M. Pugh, E. Robertson, N. Viovy, C. Yue, and S. Zaehle. (2017). Historical carbon dioxide emissions caused by land-use changes are possibly larger than assumed. Nature Geoscience 10:79-86
  22. L. Calle, J. G. Canadell, P. Patra, P. Ciais, K. Ichii, H. Tian, M. Kondo, S. Piao, A. Arneth, A. B. Harper, A. Ito, E. Kato, C. Koven, S. Sitch, B. D. Stocker, N. Viovy, A. Wiltshire, S. Zaehle, and B. Poulter. (2016). Regional carbon fluxes from land use and land cover change in Asia, 1980-2009. Environmental Research Letters 11:074011
  23. L. Calle, D. E. Gawlik, Z. Xie, L. Green, B. Lapointe, and A. Strong. (2016). Effects of tidal periodicities and diurnal foraging constraints on the density of foraging wading birds. The Auk: Ornithological Advances 133:378-396
  24. L. Green, D. E. Gawlik, L. Calle, and B. Lapointe. (2014). Relative effects of physical and small-scale factors on the distribution of tropical seagrasses in the Great White Heron National Wildlife Refuge, Lower Florida Keys. Aquatic Botany 124:45-53
  25. L. Calle, L. Green, D. E. Gawlik, and B. E. Lapointe. (2014). Feasibility of evaluating the impacts of sea level rise on foraging habitat of the Little Blue Heron in the Great White Heron National Wildlife Refuge: Phase II, factors affecting habitat. Final report to the USFS, Big Pine Key, Florida.
  26. L. Calle, D. E. Gawlik, Z. Xie, and B. Johnson. (2012). Feasibility of evaluating the impacts of sea level rise on foraging habitat of the Little Blue Heron in the Great White Heron National Wildlife Refuge. Final report to the U.S. Fish and Wildlife Service, Big Pine Key, Florida.
  27. L. Calle and D. E. Gawlik. (2011). Anthropogenic food in the diet of the Sacred Ibis, Threskiornis aethiopicus, a non-native wading bird in southeastern Florida, USA. Florida Field Naturalist 39:1-15

SOFTWARE & DATA PRODUCTS

INVITED TALKS

CONFERENCE ACTIVITY

Papers

PROFESSIONAL WORKSHOPS ORGANIZED & CO-ORGANIZED

PROFESSIONAL SERVICE & ASSOCIATIONS

MENTORING AND CAREER DEVELOPMENT

COMMUNITY OUTREACH

RESEARCH PERMITTING

Florida Fish and Wildlife Conservation Commission (2010, 2012); U.S. Fish and Wildlife Service (2012); NOAA (2012); IACUC (2012)