Dr. Steve Bollens
My research is broadly concerned with the ecology of marine, estuarine and freshwater 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.
Lee*, T.A., S.M. Bollens, G. Rollwagen-Bollens, and J. E. Emerson*+. 2016. The effects of eutrophication and invasive species on zooplankton community dynamics in a shallow temperate lake. Fundamental and Applied Limnology, 188: 215-231.
Adams*, J., S. M. Bollens, and J. Bishop. 2015. Predation on the invasive copepod, Pseudodiaptomus forbesi, and native zooplankton in the lower Columbia River: An experimental approach to quantify differences in prey-specific feeding rates. PLoS One, DOI: 10.1371/journal.pone.0144095
Bowen*, A., G. Rollwagen-Bollens, S. M. Bollens and J. Zimmerman+. 2015. Feeding of the invasive copepod Pseudodiaptomus forbesi on natural microplankton assemblages in the lower Columbia River. Journal of Plankton Research, 37: 1089-1094. DOI: 10.1093/plankt/fbv078
Lee*, T. A., G. C. Rollwagen-Bollens, and S. M. Bollens. 2015. The influence of water quality variables on cyanobacteria blooms and phytoplankton community composition in a shallow temperate lake. Environmental Monitoring and Assessment, 187(6): 315. DOI: 10.1007/s10661-015-4550-2.
Breckenridge+, J., S. M. Bollens, G. C. Rollwagen-Bollens, and C. Roegner. 2015. Plankton assemblage variability in a river-dominated temperate estuary during late spring (high-flow) and late summer (low-flow) periods. Estuaries and Coasts, 38: 93-103. DOI: 10.1007/s12237-014-9820-7
Lee*, T. A., G. Rollwagen-Bollens, S. M. Bollens, and J. Faber-Hammond. 2015. Environmental influence on cyanobacteria abundance and microcystin toxin production in a shallow temperate lake. Ecotoxicology and Environmental Safety, 114: 318-325. DOI: 10.1016/j.ecoenv.2014.05.004
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:. 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. . 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.