Christopher "Alex" Hartman

Biography

Dr. Alex Hartman is a Wildlife Biologist with the USGS Western Ecological Research Center at the Dixon Field Station. His interests and expertise are in waterbird ecology, wetlands, behavioral ecology, breeding biology, and the effects of contaminants on avian ecology and reproduction.

 

Education:

  • Ph.D., Ecology, Evolution and Conservation Biology, University of Nevada, Reno, 2008
  • M.Sc., Environmental and Natural Resource Sciences, University of Nevada, Reno, 2003
  • B.Sc., Biological Sciences, University of California, Davis, 1997

 

Professional Experience:

  • Wildlife Biologist, U.S. Geological Survey, Western Ecological Research Center, Dixon Field Station, California (2013-present)
  • Wildlife Biologist, U.S. Geological Survey, Western Ecological Research Center, UC Davis Field Station, California (2011-2013)
  • Shorebird Conservation Biologist, Audubon California, Sacramento, California (2009-2011)
  • Landbird Program Supervisor, San Francisco Bay Bird Observatory, Milpitas, California (2009)
  • Doctoral Research, Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno (2003-2008)
  • Masters Research, Department of Environmental and Natural Resource Sciences, University of Nevada, Reno (2000-2003)

 

Publications:

Croston, R, CA Hartman, MP Herzog, ML Casazza, and JT Ackerman. 2018. A new approach to automated incubation recess detection using temperature loggers. The Condor 120:739–750.

Peterson, SH, JT Ackerman, CA Eagles-Smith, MP Herzog, and CA Hartman. 2018. Prey fish returned to Forster’s tern colonies suggest spatial and temporal differences in fish composition and availability. PLoS ONE 13(3):e0193430.

Croston, R, JT Ackerman, MP Herzog, JD Kohl, CA Hartman, SH Peterson, CT Overton, CL Feldheim, and ML Casazza. 2018. Duck nest depredation, predator behavior, and female response using video. Journal of Wildlife Management 82(5):1014-1025.

Ackerman, JT, CA Hartman, and MP Herzog. 2017. Maternal transfer of mercury to songbird eggs. Environmental Pollution 230:463-468.

Hartman, CA, JT Ackerman, MP Herzog, and CA Eagles-Smith. 2017. Season, molt, and body size influence mercury concentrations in grebes. Environmental Pollution 229:29-39.

Peterson, SH, JT Ackerman, CA Eagles-Smith, CA Hartman, and MP Herzog. 2017. A critical evaluation of the utility of eggshells for estimating mercury concentrations in avian eggs. Environmental Toxicology and Chemistry 2417-2427.

Ackerman, JT, CA Eagles-Smith, MP Herzog, CA Hartman, SH Peterson, DC Evers, AK Jackson, JE Elliott, SS Vander Pol, and CE Bryan. 2016. Avian mercury exposure and toxicological risk across western North America: a synthesis. Science of the Total Environment 568:749-769.

Ackerman, JT, CA Eagles-Smith, MP Herzog, CA Hartman. 2016. Maternal transfer of contaminants in birds: mercury and selenium concentrations in parents and their eggs. Environmental Pollution 210:145-154.

Ackerman, JT, CA Eagles-Smith, MP Herzog, JL Yee, and CA Hartman. 2016. Egg laying sequence influences egg mercury concentrations and egg size in three bird species: implications for contaminant monitoring programs. Environmental Toxicology and Chemistry 35:1458-1469.

Hartman, CA, JT Ackerman, JY Takekawa, and MP Herzog. 2016. Waterbird nest-site selection is influenced by neighboring nests and island topography. Journal of Wildlife Management 80:1267-1279.

Hartman, CA, JT Ackerman, CA Eagles-Smith, and MP Herzog. 2016. Differentiating sex and species of western grebes (Aechmophorus occidentalis) and Clark’s grebes (Aechmophorus clarkii) and their eggs using external morphometrics and discriminant function analysis. Waterbirds 39:13-26.

Hartman, CA, JT Ackerman, and MP Herzog. 2016. Island characteristics within wetlands influence waterbird nest success and abundance. Journal of Wildlife Management 80:1177-1188.

Herzog, MP, JT Ackerman, CA Eagles-Smith, and CA Hartman. 2016. It’s what’s inside that counts: egg contaminant concentrations are influenced by estimates of egg density, egg volume, and fresh egg mass. Ecotoxicology 25:770-776.

Ackerman, JT, CA Hartman, CA Eagles-Smith, MP Herzog, J Davis, G Ichikawa, and A Bonnema. 2015. Estimating mercury exposure of piscivorous birds and sport fish using prey fish monitoring. Environmental Science and Technology 49:13596-13604.

Ackerman, JT, TEC Kraus, JA Fleck, DP Krabbenhoft, WR Horwath, SM Bachand, MP Herzog, CA Hartman, and PM Bachand. 2015. Experimental dosing of wetlands with coagulants removes mercury from surface water and decreases mercury bioaccumulation in fish. Environmental Science and Technology 49:6304-6311.

Ackerman, JT, CA Hartman, and C Strong. 2015. Forster’s Tern (Sterna forsteri) and Least Tern (Sternula antillarum browni). Pages 1-6, Appendix 5.1 in Goals Project (editors) The Baylands and Climate Change: What We Can Do. Baylands Ecosystem Habitat Goals Science Update 2015 prepared by the San Francisco Bay Area Wetlands Ecosystem Goals Project. California State Coastal Conservancy, Oakland, California. 235 pages. http://baylandsgoals.org/case-studies-2/

Ackerman, JT, MP Herzog, JY Takekawa, and CA Hartman. 2014. Comparative reproductive biology of sympatric species: nest and chick survival of American avocets and black-necked stilts. Journal of Avian Biology 45:609-623.

Ackerman, JT, MP Herzog, CA Hartman, and G Herring. 2014. Forster’s tern chick survival in response to a managed relocation of predatory California gulls. Journal of Wildlife Management 78:818-829.

Page, GW, N Warnock, TL Tibbitts, D Jorgensen, CA Hartman, and LE Stenzel. 2014. Annual migratory patterns of Long-billed Curlews in the American West. Condor 116(1):50-61.

Ackerman, JT, CA Hartman, MP Herzog, JY Takekawa, JA Robinson, LW Oring, JP Skorupa and R Boettcher. American Avocet (Recurvirostra americana), 2013. The Birds of North America Online (A Poole, editor). Cornell Lab of Ornithology: Ithaca, New York. 175 pages. http://bna.birds.cornell.edu/bna/species/275. BOOK CHAPTER

Hartman, CA, JT Ackerman, G Herring, J Isanhart, and MP Herzog. 2013. Marsh wrens as bioindicators of mercury in wetlands of Great Salt Lake:  Do blood and feathers reflect site-specific exposure risk to bird reproduction? Environmental Science and Technology 47:6597-6605.

Strum KM, ME Reiter, CA Hartman, MN Iglecia, TR Kelsey, and CM Hickey. 2013. Winter management of California’s rice fields to maximize waterbird habitat and minimize water use. Agriculture, Ecosystems & Environment 179:116-124.

Hartman, CA, and LW Oring. 2009. Reproductive success of Long-billed Curlews (Numenius americanus) in northeastern Nevada hay fields. Auk 126:420-430.

Lanctot, RB, CA Hartman, LW Oring, and RIG Morrison. 2008. Response to Farmer: Limitations of statistically-derived population estimates, and suggestions for deriving national population estimates for shorebirds. Auk 125:983-985.

Hartman, CA, and LW Oring. 2006. An inexpensive method for remotely monitoring nest activity. Journal of Field Ornithology 77:418-424.

Hartman, CA, and LW Oring. 2006. Hayfields in Nevada: Critical habitat for the highly imperiled Long-billed Curlew. Great Basin Birds 8:11-15.

Hartman, CA, and LW Oring. 2004. Long-term waterbird use of a constructed wetland in the Honey Lake Basin. Great Basin Birds 7:25-33.

Hartman, CA, and LW Oring. 2004. Renesting by Long-billed Curlew in northeastern Nevada. Waders Study Group Bulletin 104:88-91.

Hartman, CA, and LW Oring. 2003. Orientation and microclimate of Horned Lark nests: the importance of shade. Condor 105:158-163.

 

Technical Reports:

Hartman, CA, Ackerman, JT, Herzog, MP, Wang, Y, and Strong, C. 2018. Evaluation of social attraction measures to establish Forster’s tern (Sterna forsteri) nesting colonies for the South Bay Salt Pond Restoration Project, San Francisco Bay, California—2017 annual report: U.S. Geological Survey Open-File Report 2018–1090, 25 p., https://doi.org/10.3133/ofr20181090.

Hartman, CA, JT Ackerman, MP Herzog, CM Strong, D Trachtenbarg, and CA Shore. 2018. Social attraction used to establish Caspian tern (Hydroprogne caspia) nesting colonies on modified Islands at the Don Edwards San Francisco Bay National Wildlife Refuge, California—Final Report. U.S. Geological Survey Open-File Report 2018-1136, 41 p., https://doi.org/10.3133/ofr20181136.

Hartman, CA, JT Ackerman, MP Herzog, C Strong, D Trachtenbarg, and CA Shore. 2017. Evaluation of Caspian tern (Hydroprogne caspia) and snowy plover (Charadrius alexandrinus nivosus) nesting on modified islands at the Don Edwards San Francisco Bay National Wildlife Refuge, California—2016 annual report. U.S. Geological Survey Open-File Report 2017-1055, 37 p., http://dx.doi.org/10.3133/ofr20171055

Hartman, CA, JT Ackerman, MP Herzog, C Strong, D Trachtenbarg, KA Sawyer, and CA Shore. 2016. Evaluation of Caspian tern (Hydroprogne caspia) and snowy plover (Charadrius alexandrinus nivosus) nesting on modified islands at the Don Edwards San Francisco Bay National Wildlife Refuge, California—2015 annual report. U.S. Geological Survey Open-File Report 2016-1049, 36 p., http://dx.doi.org/10.3133/ofr20161049

Ross, JRM, JA Davis, P Trowbridge, J Sun, JT Ackerman, T Adelsbach, C Eagles-Smith, CA Hartman, M Herzog, D Crane, G Brooks, C Navaroli, and L Phillips. 2016. Contaminant concentrations in eggs of double-crested cormorants and Forster’s terns from San Francisco Bay: 2002-2012. San Francisco Estuary Institute, Richmond, California.

Ackerman, JT, CA Hartman, CA Eagles-Smith, MP Herzog, J Davis, G Ichikawa, and A Bonnema. 2015. Estimating exposure of piscivorous birds and sport fish to mercury in California lakes using prey fish monitoring: a predictive tool for managers. U.S. Geological Survey Open-File Report 2015-1106, 48 p., http://dx.doi.org/10.3133/ofr20151106

Ackerman, JT, MP Herzog, CA Hartman, J Isanhart, G Herring, S Vaughn, J Cavitt, CA Eagles-Smith, H Browers, and J Vest. 2015. Mercury and selenium contamination in waterbird eggs and risk to avian reproduction at Great Salt Lake, Utah: U.S. Geological Survey Open-File Report 2015-1020, 178 pp. http://dx.doi.org/10.3133/ofr20151020

Ackerman, JT, CA Eagles-Smith, GH Heinz, SEW De La Cruz, JY Takekawa, AK Miles, TL Adelsbach, MP Herzog, JD Bluso-Demers, SA Demers, G Herring, DJ Hoffman, CA Hartman, JJ Willacker, TH Suchanek, SE Schwarzbach, and TC Maurer. 2014. Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction: U.S. Geological Survey Open-File Report 2014-1251, 222 pp. http://dx.doi.org/10.3133/ofr20141251

Ackerman, JT, CA Hartman, MP Herzog, LM Smith, SM Moskal, SEW De La Cruz, JL Yee, and JY Takekawa. 2014. The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California: U.S. Geological Survey Open-File Report 2014-1263, 118 pp. http://dx.doi.org/10.3133/ofr20141263

Ackerman, JT, MP Herzog, CA Hartman, T Watts, and J Barr. 2014. Waterbird egg mercury concentrations in response to wetland restoration in south San Francisco Bay, California: U.S. Geological Survey Open-File Report 2014-1189, 22 pp. http://dx.doi.org/10.3133/ofr20141189

Ackerman, JT, MP Herzog, and CA Hartman. 2014. Effects of human disturbance on waterbird nesting and reproductive success at restoration pond SF2, south San Francisco Bay, California: U.S. Geological Survey Open-File Report 2014-1223, 16 pp. http://dx.doi.org/10.3133/ofr20141223

Ackerman, JT, and CA Hartman. 2014. Tree swallow nesting box study at Cosumnes River Preserve. U.S. Geological Survey Report prepared for the Cosumnes River Preserve, Bureau of Land Management, and The Nature Conservancy. 8 pp.

Ackerman, JT, MP Herzog, G Herring, CA Hartman, J Bluso-Demers, and C Robinson-Nilsen. 2013. Impact of salt pond restoration on California Gull displacement and predation on breeding waterbirds. U.S. Geological Survey Report prepared for the South Bay Salt Pond Restoration Project and Resources Legacy Fund. 83 pp.

Ackerman, JT, M Marvin-DiPasquale, D Slotton, CA Eagles-Smith, MP Herzog, CA Hartman, JL Agee, and S Ayers. 2013. The South Bay Mercury Project: using biosentinels to monitor effects of wetland restoration for the South Bay Salt Pond Restoration Project. U. S. Geological Survey, Western Ecological Research Center, Davis, CA. 227 pp.

Ackerman, JT, CA Hartman, and MP Herzog. 2013. San Francisco Bay triennial bird egg monitoring program for contaminants – 2012 data summary.  U.S. Geological Survey Report prepared for the Regional Monitoring Program in San Francisco Bay. 18 pp.

Ackerman, JT, MP Herzog, and CA Hartman. 2012. The South Bay Mercury Project: Using biosentinels to monitor effects of wetland restoration for the South Bay Salt Pond Restoration Project (waterbird mercury component). Administrative Report, U. S. Geological Survey, Western Ecological Research Center, Davis, CA. 79 pp.

Ackerman, JT, MP Herzog, CA Hartman, LA Brand, JY Takekawa, and J Bluso-Demers. 2012. The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project. Annual Report, U. S. Geological Survey, Western Ecological Research Center, Davis, CA. 19 pp.

Hartman, CA, and RT Kelsey. 2011. Mountain plover winter distribution and habitat use in California: Results of the 2011 statewide survey. Technical Report submitted to the U.S. Fish and Wildlife Service Migratory Bird Program. 58 pp.