Leonard W. Haas

Research Interests

Current Projects

Selected Publications

Research Interests

My broad research interests are marine microbial food web dynamics in estuarine and coastal plankton systems, and interaction of physical-hydrodynamic processes with planktonic physiological and ecological processes.  These interests are expressed in the following specific research areas: growth and grazing dynamics of heterotrophic microflagellates; physiological ecology of coccoid cyanobacteria; use and development of epifluorescent microscopy for the study of planktonic microbes; nutrient and plankton dynamics in the Chesapeake Bay and tributaries.

Current Projects

• Analysis and synthesis of Chesapeake Bay Program water quality monitoring data from the mainstem Chesapeake Bay and tributaries for the purposes of ecological interpretation for the l997 re-evaluation.  I am presently evaluating new and innovative technologies for incorporation into the Chesapeake Bay monitoring program.

Selected Publications

Hoepffner, N. and L. W. Haas.  1990.  Electron microscopy of nanoplankton from the North Pacific central gyre. J. Phycol. 26:421-439. 

Ray, R. T., L. W. Haas, and M. E. Sieracki.  1989.  Autotrophic picoplankton dynamics in a Chesapeake Bay sub-estuary.  Mar. Ecol. Prog. Ser. 51:273-285. 

Haas, L. W. and B. W. Hill.  1987.  Hypoxia in Virginia's Estuaries: an assessment of historical data.  Pages 5-11 In G. B. Mackiernan (ed.) Dissolved oxygen in the Chesapeake Bay, processes and effects.  Maryland Sea Grant Publication, College Park, Maryland.