Alexander Bochdansky
Professor
Ocean & Earth Sciences
Contact Information
Organizational Chart
Education/Credentials
Ph.D. in Biological Oceanography, Memorial University Of Newfoundland, (1997)
Magister der Naturwissenschaften in Physiology/Marine Biology, University of Vienna, (1992)
-
Expertise
- Oceanography
- Plankton and microbial ecology
-
Articles
- (2019). A full ocean depth rated modular lander and pressure retaining sampler capable of collecting hadal endemic microbes under in situ conditions.
- (2019). Estimating carbon flux from optically recording total particle volume at depths below the primary pycnocline.
- Bochdansky, A. B., Clouse, M. A., and Herndl, G. J. (2017). Eukaryotic microbes, principally fungi and labyrinthulomycetes, dominate biomass on bathypelagic marine snow. The ISME Journal, 11 (2), pp. 362–373.
- Bochdansky, A. B., Clouse, M. A., and Hansell, D. A. (2017). Mesoscale and high-frequency variability of macroscopic particles (> 100$μ$m) in the Ross Sea and its relevance for late-season particulate carbon export. Journal of Marine Systems, 166, pp. 120–131.
- Bochdansky, A. B., Clouse, M. A., and Herndl, G. J. (2016). Dragon kings of the deep sea: marine particles deviate markedly from the common number-size spectrum. Scientific reports, 6,
- Garrison, C., and Bochdansky, A. B. (2015). A simple separation method for downstream biochemical analysis of aquatic microbes. Journal of microbiological methods, 111, pp. 78–86.
- Bochdansky, A. B., and Clouse, M. A. (2015). New tracer to estimate community predation rates of phagotrophic protists. Marine Ecology Progress Series, 524, pp. 55–69.
- Bochdansky, A. B., Jericho, M. H., and Herndl, G. J. (2013). Development and Deployment of a Point-Source Digital Inline Holographic Microscope for the Study of Plankton and Particles to a Depth of 6000 m. Limnology and Oceanography: Methods, 11 (1), pp. 28–40.
- Morgan-Smith, D., Clouse, M. A., and Bochdansky, A. B. (2013). Diversity and distribution of microbial eukaryotes in the deep tropical and subtropical North Atlantic Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 78, pp. 58-69.
- Morgan-Smith, D., Garrison, E. C., and Bochdansky, A. B. (2013). Mortality and survival of cultured surface-oceanflagellates under simulated deep-sea conditions. Journal of Experimental Marine Biology and Ecology, 445, pp. 13-20.
- Morgan-Smith, D., Herndl, G. J., Van Aken, H. M., and Bochdansky, A. B. (2011). Abundance of eukaryotic microbes in the deep subtropical North Atlantic. Aquatic Microbial Ecology, 65 (2), pp. 103–115.
- Bollens, S. M., Rollwagen-Bollens, G., Quenette, J. A., and Bochdansky, A. B. (2010). Cascading migrations and implications for vertical fluxes in pelagic ecosystems. Journal of Plankton Research pp. fbq152.
- Bochdansky, A. B., Bollens, S., Rollwagen-Bollens, G., and Gibson, A. (2010). Effect of the heterotrophic dinoflagellate Oxyrrhis marina and the copepod Acartia tonsa on vertical carbon fluxes in and around thin layers of the phytoflagellate Isochrysis galbana. Mar. Ecol. Prog. Ser (402), pp. 179-196.
- Nagata, T., Tamburini, C., Arístegui, J., Baltar, F., Bochdansky, A. B., Fonda-Umani, S., Fukuda, H., Gogou, A., Hansell, D. A., Hansman, R. L., and others (2010). Emerging concepts on microbial processes in the bathypelagic ocean–ecology, biogeochemistry, and genomics. Deep Sea Research Part II: Topical Studies in Oceanography, 57 (16), pp. 1519–1536.
- Bochdansky, A. B., and Huang, L. (2010). Re-evaluation of the EUK516 probe for the domain Eukarya results in a suitable probe for the detection of kinetoplastids, an important group of parasitic and free-living flagellates. J. Euk. Microbiol (57), pp. 229-235.
- Bochdansky, A. B., van Aken, H. M., and Herndl, G. J. (2010). Role of macroscopic particles in deep-sea oxygen consumption. Proceedings of the National Academy of Sciences, 107 (18), pp. 8287–8291.
- Bochdansky, A. B., and Bollens, S. Thin layer formation during runaway stratification in the tidally dynamic San Francisco Estuary. J. Plankton Res (31), pp. 1385-1390.
- Bochdansky, A. B., Gro, P., Pepin, P., and Leggett, W. Food limitation in larval fish: ontogenetic variation in feeding scope and its potential effect on survival. Mar. Ecol. Prog. Ser. (367), pp. 239-248.
- Bochdansky, A. B., Brunemeyer, N. D., and Leggett, W. C. Exploiting the diurnal feeding cycle to calculate gut evacuation and feeding rates in larval fish. Trans. Am. Fish. Soc. (135), pp. 390-398.
- Bochdansky, A. B., Brunemeyer, N. D., and Leggett, W. C. (2006). Model evaluation of linear gut evacuation in the larval radiated shanny using a combination of laboratory and field data. Transactions of the American Fisheries Society, 135 (2), pp. 390–398.
- Ignoffo, T. R., Bollens, S. M., and Bochdansky, A. B. (2005). Department of Biology and the Romberg Tiburon Center for Environmental Studies. Journal of Experimental Marine Biology and Ecology, 316 (2), pp. 167–182.
- Bochdansky, A. B., Grønkjær, P., Herra, T. P., and Leggett, W. C. Experimental evidence for selection against fish larvae with high metabolic rates in a food limited environment. Experimental evidence for selection against fish larvae with high metabolic rates in a food limited environment (147), pp. 1413-1417.
- Ignoffo, T., Bollens, S. M., and Bochdansky, A. B. (2005). The effects of thin layers on the vertical distribution of the rotifer, Branchionus plicatilis. J. Exp. Mar. Biol. Ecol. (316), pp. 167-181.
- Deibel, D., Saunders, P., Acuna, J., Bochdansky, A. B., Shiga, N., and Rivkin, R. (2005). The role of appendicularian tunicates in the biogenic carbon cycle of three Arctic polynyas. Response of Marine Ecosystems to Global Change: Ecological Impact of Appendicularians pp. 327–358.
- Bochdansky, A. B., and Bollens, S. M. (2004). Relevant scales in zooplankton ecology: Distribution, feeding, and reproduction of the copepod Acartia hudsonica in response to thin layers of the diatom Skeletonema costatum. Limnology and Oceanography, 49 (3), pp. 625–636.
- Bochdansky, A. B., and Deibel, D. (2001). Consequences of model specification for the determination of gut evacuation rates: redefining the linear model. Canadian Journal of Fisheries and Aquatic Sciences, 58 (5), pp. 1032–1042.
- Bochdansky, A. B., and Leggett, W. C. (2001). Winberg revisited: convergence of routine metabolism in larval and juvenile fish. Canadian Journal of Fisheries and Aquatic Sciences, 58 (1), pp. 220–230.
- Bochdansky, A. B., and Deibel, D. (1999). Functional feeding response and behavioral ecology of Oikopleura vanhoeffeni (Appendicularia, Tunicata). Journal of experimental marine biology and ecology, 233 (2), pp. 181–211.
- Acuna, J. L., Deibel, D., Bochdansky, A. B., and Hatfield, E. (1999). In situ ingestion rates of appendicularian tunicates in the Northeast Water Polynya (NE Greenland). Marine Ecology Progress Series, 186, pp. 149–160.
- Bochdansky, A. B., and Deibel, D. (1999). Measurement of in situ clearance rates of Oikopleura vanhoeffeni (Appendicularia: Tunicata) from tail beat frequency, time spent feeding and individual body size. Marine Biology, 133 (1), pp. 37–44.
- Bochdansky, A. B., Deibel, D., and Rivkin, R. B. (1998). Absorption efficiencies and biochemical fractionation of assimilated compounds in the cold water appendicularian Oikopleura vanhoeffeni. Limnology and Oceanography, 44 (2),
- Bochdansky, A. B., Deibel, D., and Hatfield, E. A. (1998). Chlorophyll a conversion and gut passage time for the pelagic tunicate Oikopleura vanhoeffeni (Appendicularia). Journal of plankton research, 20 (11), pp. 2179–2197.
- Bochdansky, A. B., and Deibel, D. (1997). Destruction of chloropigments in copepod guts. Marine ecology progress series. Oldendorf, 147 (1), pp. 301–303.
- Bochdansky, A. B., Puskaric, S., and Herndl, G. J. (1995). Influence of zooplankton grazing on free dissolved enzymes in the sea. Marine Ecology Progress Series pp. 53–63.
- Najdek, M., Puskaric, S., and Bochdansky, A. B. (1994). Contribution of zooplankton lipids to the flux of organic matter in the northern Adriatic Sea. Marine Ecology Progress Series pp. 241–249.
- Bochdansky, A. B., and Herndl, G. J. (1992). Ecology of amorphous aggregations (marine snow) in the Northern Adriatic Sea. 111. Zooplankton interactions with marine snow. Mar Ecol Prog Ser, 87, pp. 135–146.
-
Conference Proceeding
- Bochdansky, A. B. (2010). Increased respiration due to feeding activity in Dioithona oculata, a small swarm-forming copepod. ,Proceedings from the 2010 AGU Ocean Sciences Meeting
- Bochdansky, A. B., and Herndl, G. (1993). The significance of free dissolved exoenzymes in the sea: Grazing activity of zooplankton as a source of the free enzyme pool.. ,ASLO AND SWS 1993 ANNUAL MEETING. ABSTRACTS, ASLO/SWS,(USA), 1993, vp
-
Presentations
- (February, 2012). Visual basin-scale survey of deep-sea particles (200 - 6000 m) in the tropical and subtropical Atlantic Ocean using a digital inline holographic microscope. Paper presented at Ocean Sciences Meeting Salt Lake City UT.
- Bochdansky, A. B. (February, 2010). Increased respiration due to feeding activity in Dioithona oculata, a small swarm forming copepod presented at Ocean Sciences Meeting of the American Society of Limnology and Oceanography Portland, Oregon.
- Morgan-Smith, D., Bochdansky, A. B., van Aken, H., and Herndl, G. (January, 2009). Basin-scale distribution of certain bacterivorous and saprotrophic eukaryotic microbes in the deep tropical Atlantic. presented at Aquatic Sciences Meeting of the American Society of Limnology and Oceanography Nice, France.
- Bochdansky, A. B., Herndl, G. J., and van Aken, H. (January, 2009). Vertical video profiles of particles from 100 to 6000 m across the tropical Atlantic from Brazil to Africa. presented at Aquatic Sciences Meeting of the American Society of Limnology and Oceanography Nice, France.
- Bochdansky, A. B., Herndl, G., and van Aken, H. (November, 2008). Video particle profiles across the tropical Atlantic and inside a prominent fracture zone in the midatlantic ridge presented at Intergrating biochemistry and ecosystems in a changing ocean Miami, Florida.
- Palladino, D., and Bochdansky, A. B. (March, 2008). ) Phosphorus uptake, allocation and elimination in the various biochemical fractions in the estuarine copepod Acartia tonsa presented at Ocean Sciences Meeting Orlando, Florida.
- Bochdansky, A. B., and Liqun., H. (March, 2008). A new FISH probe for kinetoplastids, an important group of heterotrophic flagellates, and the evaluation of a domain-specific probe for eukaryotes presented at Ocean Sciences Meeting Orlando, Florida.
- Morgan-Smith, D., and Bochdansky, A. B. (March, 2008). Quantification and characterization of deep-sea eukaryotic communities based on morphology and fluorescence in situ hybridization with a robotic microscope presented at Ocean Sciences Meeting Orlando, Florida.
- Rollwagen-Bollens, G., Bochdansky, A. B., Bollens, S., Gibson, A., Quenette, J., and Wagner, E. (March, 2008). Upward biological pump mediated by the vertically migrating, thin-layer forming dinoflagellate Akashiwo sanguinea. presented at Ocean Sciences Meeting Orlando, Florida.
- Bollens, S., Quenette, J., Bochdansky, A. B., and Rollwagen-Bollens, G. (March, 2008). Vertical migration of "thin layers" of the dinoflagellate Akashiwo sanguineain relation to varying light and nutrient conditions. presented at Ocean Sciences Meeting Orlando, Florida.
- Bochdansky, A. B., Bollens, D., Rollwagen-Bollens, G., and Gibson, A. (February, 2007). Contribution of micro- and mesozooplankton grazers to vertical carbon fluxes from thin layers: an experimental study using radiolabeled phytoplankton Santa Fe, New Mexico.
- Bochdansky, A. B., Deibel, S., and Leggett, W. (June, 2005). Calculation of feeding rates from gut content and instantaneous rate of gut evacuation in zooplankton and larval fish presented at Meeting of the American Society of Limnology and Oceanography Santiago, Spain.
- Bochdansky, A. B., and Bollens, S. (February, 2005). Heterogeneity of vertical chlorophyll distribution during runaway stratification in the tidally dynamic San Francisco Estuary presented at Meeting of the American Society of Limnology and Oceanography Salt Lake City, Utah.
- 2013: Distinguished Research Award , College of Science
- 1996: Fellow of the School of Graduate Studies , Memorial University of Newfoundland for continued academic excellence.
- 1993: Memorial University of Newfoundland Graduate Fellowships., Memorial University of Newfoundland
- 1991: Theodor Körner Award
-
Contracts, Grants and Sponsored Research
- , "Ecology of eukaryote microbes in the deep North Atlantic." $539,945. 2012
- Bochdansky, A. B. "Basin-scale distribution and activity of deep-sea protists in the North Atlantic Ocean." $540,256. Private. August 1, 2008 - July 31, 2011
- Bochdansky, A. B.; Bollens, S. M.; Rollwagen-Bollens, G. C. "Grazing impacts of diverse zooplankton on thin layers. " $112,704. Private. January 1, 2006 - December 31, 2008
- Bochdansky, A. B. "Feeding-related energy expenditure in the tropical copepod Dioithona oculata. Travel grant for Belize, research support and 3-week all expenses paid at the Carrie Bow Cay Field Station" . Federal. May 15, 2008 - June 4, 2008
- Bochdansky, A. B. ". SGER: Construction and deployment of a high pressure chemostat system for the culture of deep sea bacteria and nanoplankton protists" $50,000. Federal. December 1, 2005 - November 30, 2006