Age-specific light preferences and vertical migration patterns of a Great Lakes invasive invertebrate, Hemimysis anomala

Boscarino, Brent T.; Halpin, Kathleen E.; Rudstam, Lars G.; Walsh, Maureen G.; Lantry, Brian F.

doi:10.1016/j.jglr.2011.06.001

Cited by 19 publications

(7 citation statements)

References 34 publications

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“…they are well demonstrated in herbivores; Gross et al ., ). Further, although the present study highlights functional response dynamics at a diurnal scale, there is clearly scope within this mysid study system to address questions relating to seasonal (Penk & Minchin, ), ontogenetic, allometric (Boscarino et al ., ) and prey‐specific (Dick et al ., ) interaction patterns. Broadly, then, the range of potential applications across invasion science as a whole is likely to be similarly diverse.…”

Section: Discussionmentioning

confidence: 99%

Deep impact:in situfunctional responses reveal context‐dependent interactions between vertically migrating invasive and native mesopredators and shared prey

et al. 2014

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Summary The ecological effects of invasive species depend on myriad environmental contexts, rendering understanding problematic. Functional responses provide a means to quantify resource use by consumers over short timescales and could therefore provide insight into how the effects of invasive species vary over space and time. Here, we use novel in situ microcosm experiments to track changes in the functional responses of two aquatic mesopredators, one native and the other an invader, as they undergo diel vertical migrations through a lake water column. The Ponto–Caspian mysid, Hemimysis anomala, a known ecologically damaging invader, generally had higher a functional response towards cladoceran prey than did a native trophic analogue, Mysis salemaai. However, this differential was spatiotemporally dependent, being minimal during the day on the lake bottom, and increasing at night, particularly inshore. Because the functional response of the native predator was spatiotemporally consistent, the above pattern was driven by changes in the invader functional response over the diel cycle. In particular, the functional response of H. anomala was significantly reduced on the lake bottom during the daytime relative to night, and predation was especially pronounced in shallow surface waters. We demonstrate the context dependency of the effects of an invasive predator on prey populations and emphasise the utility of functional responses as tools to inform our understanding of predator–prey interactions. In situ manipulations integrate experimental rigour with field relevance and have the potential to reveal how impacts manifest over a range of spatiotemporal scales.

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Section: Discussionmentioning

confidence: 99%

Deep impact:in situfunctional responses reveal context‐dependent interactions between vertically migrating invasive and native mesopredators and shared prey

et al. 2014

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“…Longer-term community experiments that incorporate adult, juvenile, and male/female Hemimysis (and other zooplanktivorous predators) are required to investigate how Hemimysis might alter native zooplankton community composition, and how these changes may subsequently affect phytoplankton composition, primary production, and overall community function. The ecological impacts of Hemimysis, and the factors that influence its ability to alter native community structure and trophic transfer, are not well understood (Ricciardi et al 2012;Walsh et al 2012). It is important to investigate how this non-native, littoral mysid may further disrupt nearshore communities.…”

Section: R a F T 21mentioning

confidence: 99%

“…Additionally, shifts in zooplankton community composition could translate to changes in the abundance and growth of planktivorous fish (Ricciardi et al 2012), and there is evidence that Hemimysis is serving as a new food source for native fish in the Great Lakes (Lantry et al 2010;Yuille et al 2012). However, refinement of these predictions is limited by a lack of knowledge of the feeding ecology of Hemimysis (Walsh et al 2012), specifically which zooplankton species they prefer to consume, making it difficult to predict their community-level impacts in North American systems.…”

Section: Introductionmentioning

confidence: 99%

“…Hemimysis feeding experiments generally have not incorporated phytoplankton or detritus (but see Pérez-Fuentetaja and Wuerstle 2014 for a feeding experiment that included phytoplankton), and their inclusion could reduce the severity of zooplankton predation and alter selectivity for certain species (as was the case for Limnomysis benedeni, Fink et al 2012). Additionally, Hemimysis is sensitive to daytime light levels, feeding near the substrate during the day and migrating up into the water column at night (Walsh et al 2010;Boscarino et al 2012). The previously discussed feeding experiments have included light and dark treatments, with the exception of Iacarella et al (2015) which used opaque mesocosms, but they did not incorporate the potential for spatial movement.…”

Section: Introductionmentioning

confidence: 99%

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The quick and the dead: copepods dominate as cladocerans decline following invasion by Hemimysis anomala

Sinclair

Arnott

Cox

2016

Can. J. Fish. Aquat. Sci.

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The North American invasion of a non-native mysid, Hemimysis anomala, has been expanding since 2006, with the first inland lake invasions detected for Oneida Lake in 2009 and Seneca Lake in 2010. Although we know that Hemimysis primarily consumes zooplankton, our ability to predict the community-level impact of an invasion is hampered by a lack of information on taxon-specific effects. To investigate the effects of Hemimysis on native zooplankton, we conducted two mesocosm experiments that compared composition between communities with and without Hemimysis and studied how the effects of this predator on zooplankton species composition varied across a natural gradient of low to high invader densities (0.01–0.1 individuals·L−1). Our first experiment found that Hemimysis primarily affected cladocerans, and particularly Daphnia, shifting communities towards dominance by copepods. Our second experiment showed that Hemimysis invasions may do little to suppress Daphnia abundances until between 0.067–0.11 individuals·L−1 or higher. Cladocerans are important links in freshwater trophic transfer and the nutrient cycle, and disruption of these linkages following Hemimysis invasion could result in both bottom-up and top-down impacts in nearshore food webs. However, Hemimysis can also fill a similar trophic role as the zooplankton they consume, and longer-term experiments are required to better assess their eventual impacts on native communities.

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“…Hemimysis undergoes a diel vertical migration, hiding in the substrate or in structural interstices during the day, and moving up into the water column at night (Borcherding et al, 2006;Boscarino et al, 2012). Previous studies have shown that it is able to feed on both benthic and pelagic food sources (Marty et al, 2010(Marty et al, , 2012 and will feed on zooplankton, especially cladocerans, algae, detritus, small benthic invertebrates, and is occasionally cannibalistic (Ketelaars et al, 1999;Borcherding et al, 2006;Ricciardi et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability in trophic offset and food sources of Hemimysis anomala in lentic and lotic ecosystems within the Great Lakes basin

Ives

Marty

Lafontaine

et al. 2013

Journal of Plankton Research

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Invasive species are a known stressor on aquatic ecosystems, particularly in the waters of the Great Lakes basin. A recent invader, Hemimysis anomala, has had significant impacts on food webs in Europe, where it invaded previous to its spread to North America. This study used carbon and nitrogen stable isotopes to characterize and compare the diet of Hemimysis from 13 sites in the Great Lakes basin. Results indicated that: (i) Hemimysis relied predominantly on pelagic carbon sources at the majority of sites, and isotopic differences between life-stages existed at two of the 13 sites examined, (ii) the trophic offset and reliance on pelagic food sources did not differ significantly between lotic and lentic sites, and (iii) the isotopic niche width of Hemimysis was spatially heterogeneous, varying by an order of magnitude among sites, but was unrelated to the degree of isotopic variation in the basal food web at each site. Observed ranges in trophic offset and the pelagic fraction of dietary carbon indicate that Hemimysis derives carbon from both benthic and water column sources, as well as at multiple trophic levels. Our results support the view that Hemimysis is an opportunistic omnivore that displays significant dietary flexibility.

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Age-specific light preferences and vertical migration patterns of a Great Lakes invasive invertebrate, Hemimysis anomala

Cited by 19 publications

References 34 publications

Deep impact:in situfunctional responses reveal context‐dependent interactions between vertically migrating invasive and native mesopredators and shared prey

Deep impact:in situfunctional responses reveal context‐dependent interactions between vertically migrating invasive and native mesopredators and shared prey

The quick and the dead: copepods dominate as cladocerans decline following invasion by Hemimysis anomala

Spatial variability in trophic offset and food sources of Hemimysis anomala in lentic and lotic ecosystems within the Great Lakes basin

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