Size‐specific effects of bighead carp predation across the zooplankton size spectra

Collins, Scott F.; Wahl, David H.

doi:10.1111/fwb.13109

Cited by 16 publications

(10 citation statements)

References 65 publications

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“…As expected, calanoids were strongly reduced by bighead carp (e.g. Collins & Wahl, ; Sass et al., ), and to a lesser extent by golden shiners, after 2 weeks of feeding (i.e. halfway through the experiment).…”

Section: Discussionsupporting

confidence: 71%

“…Indeed, predation by these invasive planktivores can exploit a considerable portion of zooplankton secondary production (e.g. Collins & Wahl, , ), driving variable changes to the abundance, composition, and size structure of planktonic invertebrate communities (DeBoer et al., ; Sass et al., ; Tumolo & Flinn, ; Xie & Chen, ). Several studies indicate that invasive carp can strongly affect the growth or condition of native species when there is strong diet overlap (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Because bluegill larvae prefer larger zooplankton (Bremigan & Stein, ; Confer & Lake, ; Confer, Mills, & O'Bryan, ; Lemly & Dimmick, ), the disproportionately strong effect of bighead carp on large bodied copepods and cladocerans (e.g. Collins & Wahl, ) may negatively affect larval bluegill growth and survival. We predicted that exploitation of zooplankton by bighead carp would reduce larval growth rates, survival, and abundance.…”

Section: Introductionmentioning

confidence: 99%

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Competition during early ontogeny: Effects of native and invasive planktivores on the growth, survival, and habitat use of bluegill

et al. 2019

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Early life stages of fishes are sensitive to ecological and environmental disturbances and experience very high mortality rates. During early ontogeny, the growth and survival of larval fish often depends on food availability. Because habitat and diet shifts are strongly tied to individual body size, factors that influence the growth rates of individuals (e.g. resource limitation, competition) also affect other aspects of ontogeny including the timing of habitat or diet shifts. In the context of biological invasions, non‐native species can potentially disrupt the interaction of larval fish with their food via competition for shared prey, reducing growth and survival during a vulnerable period of an organism's life history. We hypothesised that invasive planktivores negatively affect native species through the vulnerable larval life stage via competition for zooplankton resources. To test this hypothesis, we conducted a series of experiments to assess and contrast the effects of invasive (bighead carp, Hypophthalmichthys nobilis) and native (golden shiners, Notemigonus crysoleucas) planktivores on zooplankton densities, and their effects on the growth, survival, abundance, and habitat use of larval bluegill (Lepomis macrochirus). Overall, the effects of the invasive planktivore were consistently greater than the native planktivore in terms of reduced prey densities, reduced bluegill growth rates, and delays to the timing of ontogenetic habitat shifts. Growth rates of bluegill larvae were reduced by 58–87% in the presence of bighead carp and 37% in the presence of golden shiners (relative to controls), but such reductions did not consistently lead to reduced survival (in mesocosm experiment) or relative abundance (in pond experiment). However, we estimated that bighead carp and golden shiners delayed ontogenetic habitat shifts in bluegill by 9–24 and 1–3 days, respectively. Although we did not detect an effect of planktivores on the numbers of larval bluegill, our findings suggest that bighead carp may still affect bluegill ontogeny and freshwater food webs by disrupting the timing of ontogenetic habitat shifts. By affecting the coupling of habitats via organism movements during early ontogeny, bighead carp may indirectly disrupt predator–prey interactions of native taxa.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Competition during early ontogeny: Effects of native and invasive planktivores on the growth, survival, and habitat use of bluegill

et al. 2019

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“…This habitat heterogeneity creates a larger spatial‐temporal template within which biotic factors can have the same influence on the growth, abundance, and composition of zooplankton assemblages as in other freshwater ecosystems (Hart & Finelli, 1999). Furthermore, controlled experiments have demonstrated that biological interactions can also explain many zooplankton responses commonly observed in large floodplain rivers (Collins et al., 2018; Collins & Wahl, 2018; Jack & Thorp, 2000; Thorp & Casper, 2003). With ample evidence of spatial structuring in riverine plankton assemblages, a useful next step would be establishing the underlying driver‐response relationships that determine such spatial distributions and their consistency over time.…”

Section: Introductionmentioning

confidence: 99%

How do large river zooplankton communities respond to abiotic and biotic drivers over time? A complex and spatially dependent example

Chará‐Serna

Casper

2020

Freshwater Biology

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Recent evidence shows that in lotic, physically‐dominated ecosystems like large rivers, zooplankton can develop spatially structured assemblages and fulfill functionally important roles. While refuting the long‐standing notion that riverine zooplankton communities are numerically depauperate and spatially homogeneous, this also shows that the importance of abiotic and biotic drivers and the consistency of ecological patterns are still poorly understood for these communities. We collected zooplankton along 300 km of the Illinois River for 5 years to test the influence of a suite of biotic and abiotic variables on zooplankton density, biomass, and diversity. We hypothesized abiotic variables such as temperature, turbidity, and velocity would be predominant predictors, with biotic variables like planktivory becoming important when physical factors do not constrain them. Results showed basin‐wide declines in zooplankton taxonomic richness as planktivory from the invading silver carp (Hypophthalmichthys molitrix) increased. In contrast, density and biomass were explained by abiotic factors at the basin scale, with velocity, turbidity, and pH driving biomass and velocity driving density. We also found that both the driving factors and the plankton responses varied among the upper, middle, and lower sections of the Illinois River. We conclude that while zooplankton communities of the Illinois River are highly structured in space, the driving forces behind their distribution patterns are not simple. Instead, there is a complex spatio‐temporal template of biological, chemical, and hydraulic factors shaping these communities in the Illinois River. Along with emphasizing the importance of spatial heterogeneity in large river ecosystems, these results also support a growing view that invasive species interactions can supersede the well‐established role of abiotic factors in explaining global freshwater diversity losses. This also highlights the importance of including long‐term zooplankton sampling in ecological monitoring programs in diverse and productive large river systems like the Illinois.

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“…2014; Li et al. 2017; Tumolo and Flynn 2017; Collins and Wahl 2018). For example, in the lower Illinois River, BHC biomass has reached 45–78% of the total fish biomass (Coulter et al.…”

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confidence: 99%

Potential Effects of Bigheaded Carps on Four Laurentian Great Lakes Food Webs

Rutherford

Zhang

Kao

et al. 2021

N American J Fish Manag

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Bigheaded carps (BHCs; Silver Carp Hypophthalmichthys molitrix and Bighead Carp H. nobilis) are economically and culturally important in Asia and Europe but are considered highly invasive throughout the Mississippi River watershed and pose a threat to the food web and fisheries of the Laurentian Great Lakes. We used the Ecopath with Ecosim model framework to evaluate potential risk of BHC population growth and food web effects in four Great Lakes habitats, including mesotrophic waters of Saginaw Bay (Lake Huron) and Lake Erie and the oligotrophic main basins of Lakes Michigan and Huron. We simulated BHC population growth and food web effects under different scenarios of BHC production rates, prey vulnerability to BHCs, and availability of age‐0 BHCs to predation by salmonines. In the main basins of Lakes Michigan and Huron, the projected BHC population growth was low or negative, with a projected final BHC biomass of 0.5–1.1 times the initial introductory biomass (2% of total fish biomass for each BHC species), and BHCs had negligible effects on most food web groups across all scenarios. In contrast, in Saginaw Bay and Lake Erie, the projected BHC biomass was 2.5–12.5 times higher than the initial biomass across all scenarios, and the largest increases occurred under scenarios of high prey vulnerability to BHCs and high BHC production rates. High projected BHC biomass in Saginaw Bay and Lake Erie had negative effects on zooplankton and planktivorous fish groups and mixed effects on piscivores but had relatively negligible effects on most other food web groups across all scenarios. Our results are consistent with reported BHC effects on food webs in the Mississippi River and its tributaries and inform efforts to prevent BHC invasion of the Great Lakes.

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Size‐specific effects of bighead carp predation across the zooplankton size spectra

Cited by 16 publications

References 65 publications

Competition during early ontogeny: Effects of native and invasive planktivores on the growth, survival, and habitat use of bluegill

Competition during early ontogeny: Effects of native and invasive planktivores on the growth, survival, and habitat use of bluegill

How do large river zooplankton communities respond to abiotic and biotic drivers over time? A complex and spatially dependent example

Potential Effects of Bigheaded Carps on Four Laurentian Great Lakes Food Webs

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