Dr. Steve Bollens

Professor and Director of Multi-Campus Planning and Strategic Initiatives, College of Arts and Sciences and College of Agricultural, Human and Natural Resource Sciences
photo of Dr. Steve Bollens
Phone: (360) 546-9116
Fax: (360) 546-9064
Located in Life Sciences (VSCI) 230Q
Support Staff: Andrea Hanmann


My research is broadly concerned with the ecology of marine and estuarine zooplankton and fish, and spans the sub-disciplines of behavior, population biology, community ecology and ecosystem dynamics. My research often has an applied aspect to it, touching upon such areas as conservation biology, restoration ecology, fisheries oceanography, and global change. I employ a wide variety of approaches to "doing science", including field (observational), modeling and experimental techniques. Locations of my current or recent projects include estuaries of the northeast Pacific (CA, OR, WA, and BC), Georges Bank/Northwest Atlantic, the Arabian Sea, the Florida Keys, and the Bering Sea. These projects are funded by a wide range of federal and state agencies, including the National Science Foundation (NSF), the Environmental Protection Agency (EPA), the Office of Naval Research (ONR), the National Oceanic and Atmospheric Administration (NOAA), the United States Geological Survey (USGS), and the CALFED Bay/Delta Program.

Recent Publications

Dexter*, E., S. M. Bollens, G. Rollwagen-Bollens, J. Emerson*, and J. Zimmerman+.  2015.  Persistent versus ephemeral invasions: 8.5 years of zooplankton community dynamics in the Columbia River.  Limnol. Oceanogr

Emerson*, J. E., S. M. Bollens, and T. Counihan.  2015.  Seasonal Dynamics of Zooplankton in Columbia-Snake River system reservoirs, with special reference to the invasive copepod Pseudodiaptomus forbesi.  Aquatic Invasions, 10: 25–40.

Brown*, H., S. M. Bollens, G. S. Brown*.  2014.  Vertical distribution and diel migration of Crangon septemspinosa Say 1818 (Decapoda, Caridea) on Georges Bank, Northwest Atlantic.  Crustaceana, 87:1486 – 1499.  DOI: 10.1163/15685403-00003372.

Bollens, S. M., J. Breckenridge+, J. R. Cordell, S. Simenstad and O. Kalata+.  2014.  Zooplankton of tidal marsh channels in relation to environmental variables in the upper San Francisco Estuary.  Aquatic Biology, 21: 205-217.  DOI: 10.3354/ab00589

Lee*, T. A., G. Rollwagen-Bollens, S. M. Bollens, and J. Faber-Hammond.  2014.  Environmental influence on cyanobacteria abundance and microcystin toxin production in a shallow temperate lake.  Ecotoxicology and Environmental Safety.  In Press.  DOI: 10.1016/j.ecoenv.2014.05.004

Breckenridge+, J., S. M. Bollens, G. C. Rollwagen-Bollens, and C. Roegner.  2014.  Plankton assemblage variability in a river-dominated temperate estuary during late spring (high-flow) and late summer (low-flow) periods.  Estuaries and Coasts, In Press. DOI: 10.1007/s12237-014-9820-7

Chang, H., P. Thiers, N.R. Netusil, J.A. Yeakley, G.C. Rollwagen-Bollens, S. M. Bollens, and S. Singh.  2014.  Relationships between environmental governance and water quality in a growing metropolitan area of the Pacific Northwest, USA.  Hydrology and Earth System Sciences, 18: 1383-1395.  DOI: 10.5194/hess-18-1383-2014

Howe, E. R., C. A. Simenstad, J. D. Toft, J. R. Cordell, and S. M. Bollens.  2014.  Macroinvertebrate prey availability and fish diet selectivity in relation to environmental variables in natural and restoring North San Francisco Bay tidal channels.  San Francisco Estuary and Watershed Science, 12(1). jmie_sfews_17062. Retrieved from: http://www.escholarship.org/uc/item/0p01q99s.

Whitley*, S. N. and S. M. Bollens.  2014.  Fish assemblages across a vegetation gradient in a restoring tidal freshwater wetland: Diets and potential for resource competition.  Environ.  Biol. Fishes, 97: 659-674.  DOI: 10.1007/s10641-013-0168-9

Smits, A., A. Litt, J. R. Cordell, O. Kalata+, and S. M. Bollens.  2013.  Non-native cladoceran Bosmina coregoni established on the Pacific coast of North America.  Bioinvasion Records, 2: 281-286.  DOI: 10.3391/bir.2013.2.4.03

Rollwagen-Bollens, G. C., S. M. Bollens, A. Gonzalez, J. Zimmerman, T. Lee, and J. Emerson.  2013.  Feeding dynamics of the copepod Diacyclops thomasi before, during and following cyanobacteria blooms in a large, shallow temperate lake.  Hydrobiologia, 705: 101-118.

Bollens, S.M., Quenette*, J., and G. C. Rollwagen-Bollens.  2012.  Predator-enhanced diel vertical migration in a planktonic dinoflagellate.  Mar Ecol. Prog. Ser., 447: 49-54.  DOI: 10.3354/meps09467

Sorenson*, K.L., S. M. Bollens, and T. Counihan.  2012.  Rapid range expansion of Orconectes rusticus in the John Day River, Oregon, USA.  Aquatic Invasions. 7: 291-294.

Gewant+, D. S. and S. M. Bollens.  2012.  Fish assemblages of interior tidal marsh channels in relation to environmental variables in the upper San Francisco Estuary.  Environ. Biol. Fishes. 94: 483–499.  DOI: 10.1007/s10641-011-9963-3

Bollens, S. M., J. Breckenridge+, J. Cordell, G. C. Rollwagen-Bollens, and O. Kalata+.  2012.  Invasive Copepods in the Lower Columbia River Estuary:  Seasonal Abundance, Co-occurrence and Potential Competition with Native Copepods.  Aquatic Invasions. 7: 101-109.   DOI: 10.3391/ai.2012.7.1.011

Friedenberg*, L., S. M. Bollens, G. C. Rollwagen Bollens.  2012.  Feeding dynamics of larval Pacific herring (Clupea pallasi) on natural prey assemblages: the importance of protists.  Fisheries Oceanography. 21: 95–108.  DOI: 10.1111/j.1365-2419.2011.00611.x

*  Students under my direct supervision.

+  Technicians under my direct supervision.

Post-docs under my direct supervision.