Search Results - "BOLLENS, Stephen M"

Modeling the trophic impacts of invasive zooplankton in a highly invaded river by Dexter, Eric, Katz, Stephen L, Bollens, Stephen M, Rollwagen-Bollens, Gretchen, Hampton, Stephanie E

“…The lower Columbia River (Washington and Oregon, USA) has been heavily invaded by a large number of planktonic organisms including the invasive copepod…”
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Zooplankton invasion on a grand scale: insights from a 20‐yr time series across 38 Northeast Pacific estuaries by Dexter, Eric, Bollens, Stephen M., Cordell, Jeffery, Rollwagen‐Bollens, Gretchen

“…We present the first comprehensive analysis of the Pacific Northwest estuaries (PNWE) zooplankton time series, which encompasses 38 estuaries distributed…”
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Linking functional response and bioenergetics to estimate juvenile salmon growth in a reservoir food web by Haskell, Craig A, Beauchamp, David A, Bollens, Stephen M

“…Juvenile salmon (Oncorhynchus spp.) use of reservoir food webs is understudied. We examined the feeding behavior of subyearling Chinook salmon (O. tshawytscha)…”
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Effects of Grazing and Nutrients on Phytoplankton Blooms and Microplankton Assemblage Structure in Four Temperate Lakes Spanning a Eutrophication Gradient by Vanessa Rose, Gretchen Rollwagen-Bollens, Stephen M. Bollens, Julie Zimmerman

“…Phytoplankton assemblage dynamics are sensitive to biotic and abiotic factors, as well as anthropogenic stressors such as eutrophication, and thus are likely…”
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Stream Algal Biomass Associations with Environmental Variables in a Temperate Rainforest by Elsa K. Toskey, Stephen M. Bollens, Gretchen Rollwagen-Bollens, Peter M. Kiffney, Kyle D. Martens, Bernard T. Bormann

“…Benthic algae and autotrophic seston are important bases of stream food webs, and several different environmental factors may influence their biomass. We…”
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Nutrient Control of Phytoplankton Abundance and Biomass, and Microplankton Assemblage Structure in the Lower Columbia River (Vancouver, Washington, USA) by Gretchen Rollwagen-Bollens, Kristin A. Connelly, Stephen M. Bollens, Julie Zimmerman, Alixandra Coker

“…Nutrient limitation of phytoplankton is common but by no means universal in large temperate rivers. Previous field studies in the Columbia River, USA, are…”
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Native and invasive zooplankton show differing responses to decadal‐scale increases in maximum temperatures in a large temperate river by Dexter, Eric, Bollens, Stephen M., Rollwagen‐Bollens, Gretchen

“…It has been widely proposed that increasing global temperatures will promote the geographic spread of invasive species, yet few studies have examined the…”
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Beyond Eutrophication: Vancouver Lake, WA, USA as a Model System for Assessing Multiple, Interacting Biotic and Abiotic Drivers of Harmful Cyanobacterial Blooms by Gretchen Rollwagen-Bollens, Tammy Lee, Vanessa Rose, Stephen M. Bollens

“…Eutrophication of lakes and reservoirs has contributed to an increase in the magnitude and frequency of harmful cyanobacterial blooms; however, the interactive…”
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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 by Adams, Jesse B, Bollens, Stephen M, Bishop, John G

“…Invasive planktonic crustaceans have become a prominent feature of aquatic communities worldwide, yet their effects on food webs are not well known. The Asian…”
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Zooplankton invasions in the early 21st century: a global survey of recent studies and recommendations for future research by Dexter, Eric, Bollens, Stephen M.

“…We present a comprehensive survey of the scientific literature pertaining to non-indigenous and invasive zooplankton published across the first decades of the…”
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Feeding dynamics of larval Pacific herring (Clupea pallasi) on natural prey assemblages: the importance of protists by FRIEDENBERG, LAURA E., BOLLENS, STEPHEN M., ROLLWAGEN-BOLLENS, GRETCHEN

“…The role of protists in the diet of larval Pacific herring (Clupea pallasi) was examined in laboratory incubations conducted in May and June 2008 using a…”
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Feeding rates and prey selection of the invasive Asian clam, Corbicula fluminea, on microplankton in the Columbia River, USA by Bolam, Benjamin A., Rollwagen-Bollens, Gretchen, Bollens, Stephen M.

“…The Asian clam, Corbicula fluminea, was introduced into North America in the 1920s—first observed in the Columbia River—and has expanded its range across the…”
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Macroinvertebrate Prey Availability and Fish Diet Selectivity in Relation to Environmental Variables in Natural and Restoring North San Francisco Bay Tidal Marsh Channels by Howe, Emily R., Simenstad, Charles A., Toft, Jason D., Cordell, Jeffrey R., Bollens, Stephen M.

“…Tidal marsh wetlands provide important foraging habitat for a variety of estuarine fishes. Prey organisms include benthic/epibenthic macroinvertebrates,…”
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Toward a more comprehensive theory of zooplankton diel vertical migration: Integrating ultraviolet radiation and water transparency into the biotic paradigm by Williamson, Craig E., Fischer, Janet M., Bollens, Stephen M., Overholt, Erin P., Breckenridge, Joanne K.

“…The current prevailing theory of diel vertical migration (DVM) of zooplankton is focused largely on two biotic drivers: food and predation. Yet recent evidence…”
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The relative importance of abiotic, biotic, and spatial factors in structuring the stream macroinvertebrate metacommunity in a temperate rainforest by Toskey, Elsa K., Bollens, Stephen M., Kiffney, Peter M., Martens, Kyle D., Rollwagen-Bollens, Gretchen

“…(1) We investigated how local abiotic and biotic variables versus regional spatial and dispersal variables influenced the structure of a stream…”
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Environmental influence on cyanobacteria abundance and microcystin toxin production in a shallow temperate lake by Lee, Tammy A, Rollwagen-Bollens, Gretchen, Bollens, Stephen M, Faber-Hammond, Joshua J

“…The increasing frequency of harmful cyanobacterial blooms in freshwater systems is a commonly recognized problem due to detrimental effects on water quality…”
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The influence of water quality variables on cyanobacterial blooms and phytoplankton community composition in a shallow temperate lake by Lee, Tammy A., Rollwagen-Bollens, Gretchen, Bollens, Stephen M.

“…Cyanobacterial blooms and their detrimental effects on water quality have become a worldwide problem. Vancouver Lake, a tidally influenced shallow temperate…”
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Fish assemblages across a vegetation gradient in a restoring tidal freshwater wetland: diets and potential for resource competition by Whitley, Sarah N, Bollens, Stephen M

“…Marsh habitats have been the focus of recent worldwide restoration efforts due to their degradation and destruction as a result of human development. We…”
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Interactive effects of phosphorus and zooplankton grazing on cyanobacterial blooms in a shallow temperate lake by Rose, Vanessa, Rollwagen-Bollens, Gretchen, Bollens, Stephen M.

“…Cyanobacterial blooms are becoming increasingly common worldwide. These blooms can be moderated by grazing and/or nutrient availability, but the interactive…”
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Persistent vs. ephemeral invasions: 8.5 years of zooplankton community dynamics in the Columbia River by Dexter, Eric, Bollens, Stephen M., Rollwagen-Bollens, Gretchen, Emerson, Josh, Zimmerman, Julie

“…Nonindigenous aquatic species are becoming increasingly common in coastal and inland waters, largely due to the global transport of zooplankton via commercial…”
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