| Research Oceanographer|
Environmental Research Division
Phone: (831) 648-5336
Fax: (831) 648-8440
- Environmental and Ecosystem Modeling
Research Interests:My research interests revolve around the question: how does environmental variability affect the population dynamics of lower trophic level marine organisms ? Lower trophic level organisms (often termed the plankton) are those organisms which form the base of the marine food web, such as unicellular algae (called phytoplankton) and the microscopic unicellular (protozoan) and multicellular (metazoan) grazers and predators, such as ciliates and copepods. In turn, these organisms are the food for many small but important pelagic fish, such as sardines and anchovies. Plankton are also an important food for the larval and juvenile of larger fish, such as salmon and hake. Therefore, understanding how environmental variability affects the plankton is a key to understanding the mechanisms by which climate change affects fisheries species and our living marine resources. Underlying this basic question are several sub-themes, such as: How do physical and biological temporal changes of the environment affect the ability of an organism to find food? How much does the role of physical change versus physiological adaptation affect the population dynamics of a species? How do changes in the timing of physical events affect the match-or mismatch between predators and prey supply?
- Ph.D. Biological Oceanography. Scripps Institution of Oceanography, UCSD. La Jolla, CA. The relationship between copepod foraging behavior and their microscale distribution. Advisor: Peter J.S. Franks. 10/25/99
- B.S. Biology with Honors. Minor, Marine Science. State University of New York at Stony Brook. Stony Brook, NY. Honors Thesis: The “Personal Space” of copepods. Advisor: Jeannette Yen. 5/93
- High School. Webster High School. Webster, NY. 6/89
- Leising, A.W. Effects of interannual variability on the population dynamics of a dominant California current copepod: application of an individual-based model. In prep for Limnology and Oceanography.
- Leising, A. W., R. A. Horner, J. J. Pierson, J. R. Postel, and C. Halsband-Lenk. 2005. The balance between microzooplankton grazing and phytoplankton growth in a highly productive estuarine fjord. Progress in Oceanography 67(3/4): 366-683.
- Leising, A. W., J. J. Pierson, C. Halsband-Lenk, R. A. Horner, and J. R. Postel. 2005. Copepod grazing during spring blooms: Can Pseudocalanus newmani induce trophic cascades? Progress in Oceanography 67(3/4): 406-421.
- Leising, A. W., J. J. Pierson, C. Halsband-Lenk, R. A. Horner, and J. R. Postel. 2005. Copepod grazing during spring blooms: Does Calanus pacificus avoid harmful diatoms? Progress in Oceanography 67(3/4): 384-405.
- Leising, A. W., J. J. Pierson, S. Cary, and B. W. Frost. 2005. Copepod foraging and predation risk within the surface layer during night-time feeding forays. Journal of Plankton Research 27(10): 987-1001.
- Pierson, J. J., A. W. Leising, and C. Halsband Lenk. 2005. Reproductive success of Calanus pacificus during diatom blooms in Dabob Bay, WA. Progress in Oceanography 67(3/4): 314-331.
- Pierson, J. J., A. W. Leising, C. Halsband-Lenk, and N. Ferm. 2005. Vertical distribution and abundance of Calanus pacificus and Pseudocalanus newmani in relation to chlorophyll a concentrations in Dabob Bay, WA. Progress in Oceanography 37(3/4): 349-365.
- Halsband-Lenk, C., J. J. Pierson, and A. W. Leising. 2005. Reproduction of Pseudocalanus newmani (Copepoda: Calanoida) is deleteriously affected by diatom blooms - a field study. Progress in Oceanography 67(3/4): 332-348.
- Leising, A.W., Gentleman, W.C., and Frost, B.W. 2003. The threshold feeding response of microzooplankton within Pacific high-nitrate low-chlorophyll ecosystem models under steady and variable iron input. Deep-Sea Research II. 50:2877-2894.
- Gentleman, W.C., Leising, A.W., Frost, B.W., Murray, J.W., and Strom, S.L. 2003. Dynamics of food web models with multiple nutritional resources: a critical review of the implicit assumptions. Deep-Sea Research II. 50: 2847-2875.
- Leising, A.W., and P.J.S. Franks. 2002. Does Acartia clausi use an area-restricted search foraging strategy to find food. Hydrobiologia 480 (1-3):193-207.
- Leising, A.W. 2002. Copepod foraging in thin layers using SEARCH (Simulator for Exploring Area-restricted Search in Complex Habitats). Marine Models OnLine. 2 (1-4):1-18.
- Leising, A.W. 2001. Copepod foraging within patchy habitats and thin layers using a 2D individual-based model. Mar.Eco.Prog.Sers. 216:167-179.
- Leising, A.W., and P.J.S. Franks. 2000. Reply to “Comment: Larval Atlantic cod and haddock growth models, metabolism, ingestion and temperature effects” Can.J.Fish.Aq.Sci. 57:1-3.
- Leising, A.W., and P.J.S. Franks. 2000. Copepod vertical distribution within a spatially variable food source: a foraging strategy model. J.Plankton Res. 22:999-1024.
- Leising, A. W. and P. J. S. Franks. 1999. Larval Atlantic cod and haddock growth on Georges Bank: a model with temperature, prey size, and turbulence forcing. Can J. Fish. Aquat. Sci., 56:25-36.
- Leising, A.W. and Yen, J. 1998. Spacing mechanisms within light-induced copepod swarms. Mar.Eco.Prog.Sers., 155: 127-135.
- Jaffe, J.S., Franks, P.J.S., and Leising, A.W. 1998. Simultaneous imaging of phytoplankton and zooplankton distributions. Oceanography, 11:24-29.