Dr. Herzog is a Wildlife Biologist at the Dixon Field Station. His expertise and interests are in quantitative analysis of ecological data with specific emphasis in avian systems and the estimation of demographic parameters. Dr. Herzog also develops statistical tools and programs used in the analysis of demography and life history.
Before joining USGS, Mark was the co-Director of the Informatics Division at PRBO Conservation Science (now Point Blue), where he led the development of quantitative techniques for the analysis of avian data and helped create the highly successful California Avian Data Center.
- University of Alaska Fairbanks: Fairbanks, AK, United States
1994 to 2001 | PhD (Wildlife)
- New Mexico State University: Las Cruces, NM, United States
1992 to 1994 | M.S. (Department of Fish and Wildlife)
- University of Arizona: Tucson, AZ, United States
1987 to 1992 | B.S. (Mathematics and Ecology)
RELATED WORK EXPERIENCE:
- U.S. Geological Survey: Dixon, CA, United States
2010 to present | Wildlife Biology (Western Ecological Research Center)
- Point Blue Conservation Science: Petaluma, CA, United States
2004 to 2010 | Director of Informatics
- University of Nevada Reno: Reno, NV, United States
2001 to 2004 | Postdoctoral Researcher (Wildlife)
Ackerman, JT, MP Herzog, DC Evers, DA Cristol, KP Kenow, GH Heinz, RA Lavoie, RL Brasso, ML Mallory, JF Provencher, BM Braune, A Matz, JA Schmutz, CA Eagles-Smith, LJ Savoy, MW Meyer, and CA Hartman. Synthesis of maternal transfer of mercury in birds: implications for altered toxicity risk. Environmental Science and Technology 54:2878-2891.
Ackerman, JT, CA Hartman, MP Herzog, JY Takekawa, JA Robinson, LW Oring, JP Skorupa and R Boettcher. American Avocet (Recurvirostra americana), version 1.0, in AF Poole (editor): Birds of the World. Cornell Lab of Ornithology: Ithaca, New York. https://birdsoftheworld.org/bow/species/ameavo/cur/introduction
Croston, R, CA Hartman, MP Herzog, SH Peterson, JD Kohl, CT Overton, CL Feldheim, ML Casazza, and JT Ackerman. Interrupted incubation: how dabbling ducks respond when flushed from the nest. Ecology and Evolution accepted.
Croston, R, CA Hartman, MP Herzog, ML Casazza, CL Feldheim, and JT Ackerman. Timing, frequency, and duration of incubation recesses in dabbling ducks. Ecology and Evolution 10:2513-2529.
Herzog, MP, JT Ackerman, CA Hartman, and SP Peterson. Transmitter effects on growth and survival of Forster’s tern chicks. Journal of Wildlife Management 84:891-901.
Herzog, MP, JT Ackerman, CA Hartman, and H Browers. Nesting ecology of white-faced ibis (Plegadis chihi) in Great Salt Lake,
Science and Products
The Impact of Drought on Waterbirds and Their Wetland Habitats in California’s Central Valley
Data measuring avian influenza infection, mercury concentration, and body condition in wild waterfowl
Egg Morphometric Data Obtained for White-faced Ibis Nesting in Bear River Migratory Bird Refuge, Great Salt Lake, Utah (2010-2012)
Nest data for white-faced Ibis in Bear River Migratory Bird Refuge, Great Salt Lake, Utah in summer 2012
Mercury and selenium concentrations in bird eggs at Great Salt Lake, Utah
Incubation Constancy, Number of Incubation Recesses, Recess Duration and Mercury Concentrations for Tree Swallows at the Cosumnes River Preserve 2014
Nest attendance, incubation constancy, and onset of incubation in dabbling ducks
Dabbling duck eggs hatch after nest abandonment in the wild
Postbreeding movements and molting ecology of female gadwalls and mallards
Predator movements in relation to habitat features reveal vulnerability of duck nests to predation
Avian influenza antibody prevalence increases with mercury contamination in wild waterfowl
Machine learned daily life history classification using low frequency tracking data and automated modelling pipelines: Application to North American waterfowl
Assessment of cereal grain waste densities to aid waterfowl conservation planning in the Klamath Basin
Breeding waterbird populations have declined in south San Francisco Bay: An assessment over two decades
Wetland availability and salinity concentrations for breeding waterfowl in Suisun Marsh, California
Nocturnal incubation recess and flushing behavior by duck hens
Egg morphometrics and egg shape coefficients for White-faced Ibis (Plegadis chihi)
Interrupted incubation: How dabbling ducks respond when flushed from the nest
Science and Products
The Impact of Drought on Waterbirds and Their Wetland Habitats in California’s Central ValleyCalifornia’s Central Valley is a nexus for water resources in the state, draining the Sacramento and San Joaquin River watersheds. Urban centers, agricultural operations, and the environment all compete for limited water, and demand is expected to only increase as the population grows and agriculture intensifies. At the same time, the water supply is projected to decrease as temperatures rise, pre...
Data measuring avian influenza infection, mercury concentration, and body condition in wild waterfowlThese data represent mercury contamination, influenza infection, and body condition in 11 species of dabbling and diving ducks in the Pacific Flyway. These data support a USGS lead scientific publication.
Egg Morphometric Data Obtained for White-faced Ibis Nesting in Bear River Migratory Bird Refuge, Great Salt Lake, Utah (2010-2012)This data consists of egg morphometric data from white-faced ibis. Eggs were collected in the field and then measured and dissected in the lab to obtain estimates of length, width and mass. This data supports the following publication: Herzog, M.P., Ackerman, J.T. and Hartman, C.A., 2021. Egg morphometrics and egg shape coefficients for White-faced Ibis (Plegadis chihi). The Wilson Journal
Nest data for white-faced Ibis in Bear River Migratory Bird Refuge, Great Salt Lake, Utah in summer 2012Nest monitoring data of white-faced ibis. Data were collected at seven day intervals and provide information on success and failure of the nest during that interval. Summary vegetation and habitat data were also collected at the nest. These data support the following publication: Mark P. Herzog, Ackerman, Joshua T., Hartman, C. Alex, and Browers, Howard, 2020, Nesting ecology of White-faced
Mercury and selenium concentrations in bird eggs at Great Salt Lake, UtahThese metadata provide data used to examine mercury and selenium concentrations in eggs of birds breeding in wetlands of the Great Salt Lake ecosystem, Utah, particularly at Bear River Migratory Bird Refuge. Eggs were salvaged during 2010 - 2012 and include 33 species of birds. These data support the following publication: Ackerman, J.T., Herzog, M.P., Hartman, C.A., Isanhart, J., Herring,
Incubation Constancy, Number of Incubation Recesses, Recess Duration and Mercury Concentrations for Tree Swallows at the Cosumnes River Preserve 2014These metadata provide data used to examine tree swallow incubation behavior in relation to egg mercury concentration and maternal blood mercury concentration. These data were collected from tree swallows nesting in artificial wooden nest boxes at the Cosumnes River Preserved in California's Central Valley in 2014. Included are two datasets. One dataset provides daily incubation constancy (the pro
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Nest attendance, incubation constancy, and onset of incubation in dabbling ducksIn birds, parents must provide their eggs with a safe thermal environment suitable for embryonic development. Species with uniparental incubation must balance time spent incubating eggs with time spent away from the nest to satisfy self-maintenance needs. Patterns of nest attendance, therefore, influence embryonic development and the time it takes for eggs to hatch. We studied nest attendance (timAuthorsC. Alex Hartman, Josh T. Ackerman, Sarah H. Peterson, Brady Lynn Fettig, Michael L. Casazza, Mark P. Herzog
Dabbling duck eggs hatch after nest abandonment in the wildIn most birds, parental incubation of eggs is necessary for embryo development and survival. Using a combination of weekly nest visits, temperature dataloggers, infrared video cameras, and GPS tracking of hens, we documented several instances of duck eggs hatching after being abandoned by the incubating female. Of 2826 Mallard (Anas platyrhynchos) and Gadwall (Mareca strepera) nests monitored 2015AuthorsCarley Rose Schacter, Brady Lynn Fettig, Sarah H. Peterson, C. Alex Hartman, Mark P. Herzog, Michael L. Casazza, Josh T. Ackerman
Postbreeding movements and molting ecology of female gadwalls and mallardsThe wing molt is an important annual life-history event that occurs in waterfowl and molt site selection can play an important role in determining survival. We tracked postbreeding movements of gadwall (Mareca strepera) and mallard (Anas platyrhynchos) females that bred in the Suisun Marsh (Suisun) of California, USA, to determine molt site selection and wing molt chronology. We attached backpackAuthorsJeffrey D Kohl, Michael L. Casazza, Cory T. Overton, Mark P. Herzog, Josh T. Ackerman, Cliff L. Feldheim, John M. Eadie
Predator movements in relation to habitat features reveal vulnerability of duck nests to predationNest predation is the main cause of nest failure for ducks. Understanding how habitat features influence predator movements may facilitate management of upland and wetland breeding habitats that reduces predator encounter rates with duck nests and increases nest survival rates. For 1618 duck nests, nest survival increased with distance to phragmites (Phragmites australis), shrubs, telephone poles,AuthorsSarah H. Peterson, Josh T. Ackerman, Meghan P Keating, Carley Rose Schacter, C. Alex Hartman, Michael L. Casazza, Mark P. Herzog
Avian influenza antibody prevalence increases with mercury contamination in wild waterfowlEnvironmental contamination is widespread and can negatively impact wildlife health. Some contaminants, including heavy metals, have immunosuppressive effects, but prior studies have rarely measured contamination and disease simultaneously, which limits our understanding of how contaminants and pathogens interact to influence wildlife health. Here, we measured mercury concentrations, influenza infAuthorsClaire Stewart Teitelbaum, Josh T. Ackerman, Mason A. Hill, Jaqueline M. Satter, Michael L. Casazza, Susan E. W. De La Cruz, Walter M. Boyce, Evan James Buck, John M. Eadie, Mark P. Herzog, Elliott Matchett, Cory T. Overton, Sarah H. Peterson, Magdalena Plancarte, Andrew M. Ramey, Jeffery D. Sullivan, Diann Prosser
Machine learned daily life history classification using low frequency tracking data and automated modelling pipelines: Application to North American waterfowlBackgroundIdentifying animal behaviors, life history states, and movement patterns is a prerequisite for many animal behavior analyses and effective management of wildlife and habitats. Most approaches classify short-term movement patterns with high frequency location or accelerometry data. However, patterns reflecting life history across longer time scales can have greater relevance to species biAuthorsCory T. Overton, Michael L. Casazza, Joseph Bretz, Fiona McDuie, Elliott Matchett, Desmond Alexander Mackell, Austen Lorenz, Andrea Mott, Mark P. Herzog, Josh T. Ackerman
Assessment of cereal grain waste densities to aid waterfowl conservation planning in the Klamath BasinPostharvest waste seed from cereal grains is a major dietary component of waterfowl in the Klamath Basin in northeastern California and southeastern Oregon, a region that plays host to over a million waterfowl annually. Understanding food abundance is critical to local waterfowl management; therefore, we conducted a study in 2008 to investigate waste grain densities in barley, oat, and wheat fieldAuthorsDaniel A. Skalos, Joseph P. Fleskes, Jeffery D. Kohl, Mark P. Herzog, Michael L. Casazza
Breeding waterbird populations have declined in south San Francisco Bay: An assessment over two decadesIn south San Francisco Bay, former salt ponds now managed as wildlife habitat support large populations of breeding waterbirds. In 2006, the South Bay Salt Pond Restoration Project began the process of converting 50% to 90% of these managed pond habitats into tidal marsh. We compared American Avocet (Recurvirostra americana) and Black-necked Stilt (Himantopus mexicanus) abundance in south San FranAuthorsC. Alex Hartman, Josh T. Ackerman, Carley Rose Schacter, Mark P. Herzog, Max Tarjan, Yiwei Wang, Cheryl Strong, Rachel Tertes, Nils Warnock
Wetland availability and salinity concentrations for breeding waterfowl in Suisun Marsh, CaliforniaAvailability of wetlands with low salinities during the breeding season can influence waterfowl reproductive success and population recruitment. Salinities as low as 2 ppt (3.6 mScm–1) can impair duckling growth and influence behavior, with mortality occurring above 9 ppt (14.8 mScm–1). We used satellite imagery to quantify the amount of available water, and sampled surface water salinity at GrizzAuthorsCarley Rose Schacter, Sarah H. Peterson, Mark P. Herzog, C. Alex Hartman, Michael L. Casazza, Josh T. Ackerman
Nocturnal incubation recess and flushing behavior by duck hensIncubating birds must balance the needs of their developing embryos with their own physiological needs, and many birds accomplish this by taking periodic breaks from incubation. Mallard (Anas platyrhynchos) and gadwall (Mareca strepera) hens typically take incubation recesses in the early morning and late afternoon, but recesses can also take place at night. We examined nocturnal incubation recessAuthorsRebecca Croston, Sarah H. Peterson, C. Alex Hartman, Mark P. Herzog, Cliff L. Feldheim, Michael L. Casazza, Josh T. Ackerman
Egg morphometrics and egg shape coefficients for White-faced Ibis (Plegadis chihi)Egg size is a useful metric for maternal investment, offspring quality, and contaminant studies. Yet these values and the egg shape coefficients required to estimate egg size are not available for many species, including White-faced-Ibis (Plegadis chihi). We provide egg morphometrics derived from 319 White-faced Ibis eggs sampled at Bear River Migratory Bird Refuge, Great Salt Lake, Utah, from 201AuthorsMark P. Herzog, Josh T. Ackerman, C. Alex Hartman
Interrupted incubation: How dabbling ducks respond when flushed from the nestNesting birds must provide a thermal environment sufficient for egg development while also meeting self‐maintenance needs. Many birds, particularly those with uniparental incubation, achieve this balance through periodic incubation recesses, during which foraging and other self‐maintenance activities can occur. However, incubating birds may experience disturbances such as predator or human activitAuthorsRebecca Croston, C. Alex Hartman, Mark P. Herzog, Sarah H. Peterson, Jeffrey Kohl, Cory T. Overton, Cliff L. Feldheim, Michael L. Casazza, Josh T. Ackerman