Comparison of trophic function between the globally invasive crayfishes Pacifastacus leniusculus and Procambarus clarkii

Larson, Eric R.; Twardochleb, Laura A.; Olden, Julian D.

doi:10.1007/s10201-016-0505-8

Cited by 32 publications

(21 citation statements)

References 78 publications

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“…Third, predatory impacts might be affected by the consumption of non-animal food sources (Médoc et al 2018). All of our studied decapods are opportunistic omnivores, consuming leaf litter and other detritus even when animal prey are present (Bondar et al 2005;Rudnick and Resh 2005;Haddaway et al 2012;Rosewarne et al 2016), although the precise balance between predation, herbivory and detritivory may be context-dependent (Larson et al 2017). Future work should quantify how predatory FRs are affected by these factors-and others such as temperature, structural complexity, higher predators and parasites-that were beyond the scope of the present study.…”

Section: Pacifastacus Leniusculusmentioning

confidence: 99%

Predatory impacts of alien decapod Crustacea are predicted by functional responses and explained by differences in metabolic rate

Taylor

Dunn

2018

Biol Invasions

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Alien predators can have large impacts on prey. It is important that we understand, and ideally predict, these impacts. Here, we compare predatory impacts of size-matched decapod crustaceans-invasive alien Eriocheir sinensis and Pacifastacus leniusculus, and native European Austropotamobius pallipes-and use this case study to inform methods for impact prediction. We quantify functional responses (FRs) on three macroinvertebrate prey species, examine switching behaviour, and measure metabolic rates as a possible mechanistic explanation for differences in predation. FRs show a consistent pattern: attack coefficients and maximum feeding rates are ordered E. sinensis≥P. leniusculus≥A. pallipes for all prey species. Attack coefficients of E. sinensis are up to 6.7 times greater than those of size-matched crayfish and maximum feeding rates up to 3.0 times greater. FR parameters also differ between the invasive and native crayfish, but only up to 2.6 times. We find no evidence of switching behaviour in crayfish but suggestions of negative switching in E. sinensis. Differences in FR parameters are mirrored by differences in routine, but not standard, metabolic rate. Overall, our data predict strong predatory impacts of E. sinensis, even relative to alien P. leniusculus. Strong impacts of P. leniusculus relative to A. pallipes may be driven more by body size or abundance than per capita effect. FRs vary between prey types in line with existing knowledge of impacts, supporting the use of FRs in quantitative, prey-specific impact predictions. MRs could offer a general mechanistic explanation for differences in predatory behaviour and impacts.

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Section: Pacifastacus Leniusculusmentioning

confidence: 99%

Predatory impacts of alien decapod Crustacea are predicted by functional responses and explained by differences in metabolic rate

Taylor

Dunn

2018

Biol Invasions

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“…Stable isotope analysis offers an effective tool for quantifying the trophic ecology of a wide range of consumers. This approach has been used in past studies to examine the trophic niche of coastal consumers (Blanchet-Aurigny et al, 2015;Zhang et al, 2019), the dietary overlap of co-occurring vertebrate species (Bootsma et al, 1996;Larson, Twardochleb & Olden, 2017), and the relative importance of basal carbon sources in consumer food webs (Garcia et al, 2017;Grieve & Lau, 2018;David et al, 2019). Nitrogen stable isotope values (δ 15 N) are commonly used to infer the trophic position of consumers, while carbon stable isotope values (δ 13 C) can be used to quantify the use of terrestrial vs. aquatic resources (Crawford, Mcdonald & Bearhop, 2008;Inger & Bearhop, 2008).…”

Section: Introductionmentioning

confidence: 99%

Stable isotope analyses identify trophic niche partitioning between sympatric terrestrial vertebrates in coastal saltmarshes with differing oiling histories

Moyo

Bennadji

Laguaite

et al. 2021

PeerJ

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Bioindicator species are commonly used as proxies to help identify the ecological effects of oil spills and other stressors. However, the utility of taxa as bioindicators is dependent on understanding their trophic niche and life history characteristics, as these factors mediate their ecological responses. Seaside sparrows (Ammospiza maritima) and marsh rice rats (Oryzomys palustris) are two ubiquitous terrestrial vertebrates that are thought to be bioindicators of oil spills in saltmarsh ecosystems. To improve the utility of these omnivorous taxa as bioindicators, we used carbon and nitrogen stable isotope analysis to quantify their trophic niches at saltmarshes in coastal Louisiana with differing oiling histories. We found that rats generally had lower trophic positions and incorporated more aquatic prey relative to seaside sparrows. The range of resources used (i.e.,trophic niche width) varied based on oiling history. Seaside sparrows had wider trophic niches than marsh rice rats at unoiled sites, but not at oiled sites. Trophic niche widths of conspecifics were less consistent at oiled sites, although marsh rice rats at oiled sites had wider trophic niches than rats at unoiled sites. These results suggest that past oiling histories may have imparted subtle, yet differing effects on the foraging ecology of these two co-occurring species. However, the temporal lag between initial oiling and our study makes identifying the ultimate drivers of differences between oiled and unoiled sites challenging. Even so, our findings provide a baseline quantification of the trophic niches of sympatric seaside sparrows and marsh rice rats that will aid in the use of these species as indicators of oiling and other environmental stressors in saltmarsh ecosystems.

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“…This was somewhat unexpected given that previous studies had detailed direct and indirect effects of various crayfish species on aquatic macroinvertebrates (Hill et al, 1993;Matthews et al, 1993;Momot, 1995;Parkyn et al, 1997). However, the precise balance between predation, herbivory and detritivory may be context-dependent (Larson et al, 2017). And in our case, a mixed efficiency of natural recolonization and resistance by macroinvertebrates less vulnerable to crayfish could be behind this lack of net effects, as previous information suggests.…”

Section: Effects On Particular Taxamentioning

confidence: 48%

“…Simultaneously, such microdistribution patterns involve a higher variance of abundances to a great degree, thus complicating the detection of effects for particular groups of taxa (Crowl et al, 1997). On the other hand, there is evidence that crayfish species obtain their energy from diverse aquatic or submerged terrestrial resources (Hill et al, 1993;Nyström and Granéli, 1996;Nyström, 2002;Usio and Townsend, 2002;Larson et al, 2017). The absence of macrophytes and detritus spots conditioned by the fast flowing waters, together with the difficulties that crayfish encounter when trying to mechanically extract periphyton (Luttenton et al, 1998), probably led to the high availability of benthic macroinvertebrates at Arroyo del Rincón.…”

Section: Total Abundance and Biomass Of Macroinvertebratesmentioning

confidence: 99%

Do native white-clawed crayfish impact macroinvertebrate assemblages in Mediterranean limestone headwaters?

Arce

Alonso

Camacho

et al. 2019

Knowl. Manag. Aquat. Ecosyst.

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Crayfish are among the largest aquatic macroinvertebrates in rivers and streams. Their trophic ecology is important for the understanding of the functioning of benthic communities. This is relevant in key areas, such as headwaters, as they partly condition the processes occurring downstream. To shed light on the effects of native white-clawed crayfish, Austropotamobius pallipes, on local macroinvertebrate assemblages from running headwaters, a three-month mesocosm-based field study was designed. Collection and subsequent analysis of benthic samples under different crayfish density levels yielded a set of metrics indicative of short-term impacts at general and taxonomic scales. Neither significant positive nor negative effects on the community were evident in terms of richness, diversity, dominance and biomass. A combination of highly patched distributions of macroinvertebrates along with a weak impact of crayfish foraging activity is considered to explain this lack of effects. Only temporal changes associated with particular biological cycles appeared for some of the main taxa. Based on the results, we are not able to determine whether the white-clawed crayfish perceptibly disturbs the structure and composition of the local macroinvertebrate assemblages in the short-term. Thus, its use in future restocking projects is supported.

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Comparison of trophic function between the globally invasive crayfishes Pacifastacus leniusculus and Procambarus clarkii

Cited by 32 publications

References 78 publications

Predatory impacts of alien decapod Crustacea are predicted by functional responses and explained by differences in metabolic rate

Predatory impacts of alien decapod Crustacea are predicted by functional responses and explained by differences in metabolic rate

Stable isotope analyses identify trophic niche partitioning between sympatric terrestrial vertebrates in coastal saltmarshes with differing oiling histories

Do native white-clawed crayfish impact macroinvertebrate assemblages in Mediterranean limestone headwaters?

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