Kleptoparasitism and scavenging by the invasive green crab (Carcinus maenas) have different impacts on native species

Quinn, Brady K.; Boudreau, Melanie R.

doi:10.1007/s00227-016-2964-1

Cited by 6 publications

(16 citation statements)

References 47 publications

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“…Snails commonly interfere with one another's foraging by displacing feeding competitors and/or kleptoparasitizing flesh from the barnacles or mussels being consumed by other snails (Dunkin & Hughes, ; Hughes & Dunkin, ). Increased conspecific density enhances snail interference (Morton, ; Quinn & Boudreau, ). Given the relatively high density of barnacles in our experiment, snails may not have been limited by resource abundance or search times.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to reducing exploitative competition, risk-induced reductions in foraging activity should also reduce interference com- Snails commonly interfere with one another's foraging by displacing feeding competitors and/or kleptoparasitizing flesh from the barnacles or mussels being consumed by other snails . Increased conspecific density enhances snail interference (Morton, 2010;Quinn & Boudreau, 2016 (b). Regressions were fit for all data (N = 64) and separately for each crab treatment (N = 32).…”

Section: Predation Risk and Intraspecific Competition Among Snailsmentioning

confidence: 99%

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Cascading effects of a top predator on intraspecific competition at intermediate and basal trophic levels

2018

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Predators can impact competition among prey by altering prey density via consumption or by causing prey to modify their traits or foraging behavior. Yet, differences between these two mechanisms may lead to different cascading impacts on lower trophic levels. Using a crab‐snail‐barnacle rocky intertidal food chain, we tested the effects of predation risk from crabs (top predators) on intraspecific competition among snails (intermediate consumers) and emergent indirect effects on the density of and competition among barnacles (basal resources). The per capita foraging and growth rates of snails declined with high conspecific density. Predation risk from crabs, which caused even larger reductions in snail foraging and growth, weakened competition among snails, whereas a 45% increase in barnacle density had no detectable effect on snail competition. Intraspecific competition between barnacles, however, depended on the interactive effects of barnacle density, snail density, and crab predation risk. Barnacles developed hummocking morphologies as they grew and competed for space. Hummock formation (a proxy for competition) increased as a result of either greater initial barnacle density or reduced snail foraging pressure, but these effects depended on predation risk. The effects of crab predation risk on snail foraging behavior weakened an otherwise strong relationship between barnacle density and hummock development: hummocking increased with barnacle density in the absence of crabs but remained relatively high when crabs were present. In communities with similar final barnacle densities, hummocking was more common in those with crabs than those without crabs. The extent to which predators can drive trophic cascades by suppressing the foraging rates of their prey is highly context‐dependent: the positive trait‐mediated indirect effect of predators on basal resource abundance is stronger when many prey respond simultaneously to the threat of predation. However, our results demonstrate that top predators can also enhance competition among basal resources even when their indirect effect on resource abundance is relatively weak. Hence, the cascading effects of predators on competition within lower trophic levels may play an important but under‐appreciated role in the dynamics of basal resource populations and the communities they support. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13131/suppinfo is available for this article.

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Section: Discussionmentioning

confidence: 99%

Section: Predation Risk and Intraspecific Competition Among Snailsmentioning

confidence: 99%

Cascading effects of a top predator on intraspecific competition at intermediate and basal trophic levels

2018

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“…For instance, mathematical models examining the trophic interactions among the nonindigenous green crab C. maenas and the native dogwhelk Nucella lapillus foraging on Mytilus spp. mussels in Atlantic Canada revealed that crab kleptoparasitism (i.e., crabs taking mussels from whelks) had negative effects on whelks, whereas no significant impact on whelks was detected for crab scavenging (i.e., crabs feeding on mussels abandoned by whelks) (Quinn and Boudreau 2016 ). A study examining the impact of a native herbivorous reef fish, the bluespine unicornfish ( Naso unicornis ), on the growth and distribution of the nonindigenous Gracilaria salicornia in the Hawaii Marine Laboratory Refuge reported that the unicornfish might serve as both a control agent and a natural transport vector for G. salicornia (Bierwagen et al 2017 ).…”

Section: Biotic Interactionsmentioning

confidence: 99%

“…The dramatic effects of invasive species on recipient ecosystems are well recognized (Simberloff et al 2013 ). This collection compiles information on the impact of over 40 marine NIS, including five well-known invaders, the killer alga Caulerpa taxifolia (Cvitkovic et al 2017 ), the alga U. pinnatifida (South and Thomsen 2016 ), the European green crab C. maenas (Gehrels et al 2016 ; Lutz-Collins et al 2016 ; Quinn and Boudreau 2016 ), the Mediterranean mussel Mytilus galloprovincialis (Alexander et al 2015 ), and the Asian date mussel Arcuatula senhousia (Como et al 2016 ). The first four listed species are considered the world’s worst invasive NIS (ISSG 2016 ), while the latter is listed as one of the 100 worst invasive NIS in Europe (DAISIE 2016 ).…”

Section: Impacts Of Nonindigenous Speciesmentioning

confidence: 99%

An overview of recent research in marine biological invasions

Chan

Briski

2017

Mar Biol

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The Topical Collection on Invasive Species includes 50 articles addressing many tenets of marine invasion ecology. The collection covers important topics relating to propagule pressure associated with transport vectors, species characteristics, attributes of recipient ecosystems, invasion genetics, biotic interactions, testing of invasion hypotheses, invasion dynamics and spread, and impacts of nonindigenous species. This article summarizes some of the collection’s highlights.

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“…This reduced feeding rate results in greater impairment of gastropod feeding than would result from competition with crabs alone (Quinn et al 2012, Wong et al 2012, leading to less gastropod-induced mortality of bivalve prey (Hamilton 2000, and other effects (Quinn et al 2012, Wong et al 2012, Morgan et al 2016. IGP scenarios also create the possibility of there being further complex interactions between predators of bivalves, including positive interactions or facilitation [when one predator feeds more in response to the other s presence (Daleo et al 2005, Wong et al 2012], as well as kleptoparasitism and scavenging interactions (Boudreau et al 2013, Quinn & Boudreau 2016. Kleptoparasitism refers to an interaction in which one organism (the kleptoparasite) obtains some resource already acquired by another (the host) by stealing it (Barnard & Sibly 1981), including when one predator steals a prey item acquired by another (Iyengar 2008).…”

Section: Introductionmentioning

confidence: 99%

Potential kleptoparasitism-scavenging interactions between crabs and shell-boring gastropods feeding on bivalve prey: a global survey

Quinn

2020

Plankton Benthos Res

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Shell-boring gastropod molluscs and crabs are important predators of many bivalve molluscs, and impact bivalve populations and food webs. When gastropods and crabs target the same bivalve prey, complex interactions between them arise that mediate their impacts. Kleptoparasitism and scavenging (K-S) interactions result when one predator, usually the gastropod, loses or abandons its prey, which is then stolen or scavenged by the other. Such interactions have thus far only been reported among nine crab-gastropod species groups when they fed on shared bivalve prey, but potentially occur among many others. This study used the Global Biotic Interactions (GloBI) database to search for records of shell-boring gastropods and crabs preying on the same bivalve to identify tritrophic bivalve-crab-gastropod systems in which K-S interactions may occur. In total, 871 such systems were found, which included 58 bivalve species that were each eaten by 1-8 species of shell-boring gastropods and 1-19 species of crabs. In the vast majority of these systems (>99%), no previous report of K-S interactions has been published, although in 334 cases the gastropod and crab have been reported to undergo competitive or predator-prey interactions, which may indicate that K-S and other complex interactions occur among them. The tritrophic systems identified in the present survey should be investigated in future studies to determine whether the identified crab and gastropod taxa do in fact undergo K-S interactions. Doing so will enable the development of a theoretical framework for assessing the occurrence, evolution, utilization, and impacts of these interactions in natural systems.

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Kleptoparasitism and scavenging by the invasive green crab (Carcinus maenas) have different impacts on native species

Cited by 6 publications

References 47 publications

Cascading effects of a top predator on intraspecific competition at intermediate and basal trophic levels

Cascading effects of a top predator on intraspecific competition at intermediate and basal trophic levels

An overview of recent research in marine biological invasions

Potential kleptoparasitism-scavenging interactions between crabs and shell-boring gastropods feeding on bivalve prey: a global survey

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