A predicted change in the amino acid landscapes available to freshwater carnivores

Dwyer, Georgia; Stoffels, Rick J.; Rees, Gavin N.; Shackleton, Michael; Silvester, Ewen

doi:10.1086/696128

Cited by 19 publications

(13 citation statements)

References 81 publications

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“…As in previous studies, our results revealed that aquatic invertebrate families, genera, and species differ in their amino acid composition (Aranguren‐Riaño et al, ; Brucet et al, ; Dwyer et al, ; Guisande et al, ; Kolmakova et al, ; Ventura & Catalan, ). In an extensive study that included 13 zooplankton species, 85% were successfully classified according to their amino acid composition (Guisande et al, ).…”

Section: Discussionsupporting

confidence: 87%

“…This study represents one of the most comprehensive assessments of amino acids in aquatic food webs to date, with results for 12 major taxa (21 genera or species) from six temperate lakes in eastern Canada. Overall, this study adds to the limited literature on the amino acid composition of benthic invertebrates (Dwyer, Stoffels, Rees, Shackleton, & Silvester, ; Kolmakova et al, ), zooplankton (Aranguren‐Riaño et al, ; Dabrowski & Rusiecki, ; Guisande et al, ; Ventura & Catalan, ), epilithic biofilm (Kolmakova et al, ; Ylla et al, ), and fish (Kolmakova et al, ) from freshwater systems, and results indicate that amino acids can be used to discriminate taxa within food webs. In addition, our findings also support the few studies showing that amino acid composition within one taxon differs among freshwater systems (Aranguren‐Riaño et al, ; Brucet et al, ).…”

Section: Discussionmentioning

confidence: 63%

“…Amino acid composition of the invertebrate consumer corresponds to that of their diet (Guisande et al, ; Kolmakova et al, ), a finding also observed herein; the amino acid profiles of the FFGs and TDs from Kejimkujik lakes were significantly different (based on HIS). In contrast, Dwyer et al () concluded that amino acids of benthic invertebrates were related to phylogeny and not FFGs. A limitation of the current study is the inability to separate the influence of taxonomy from FFG; although macroinvertebrate taxa grouped naturally into different FFGs, ideally one should assess its influence within families or genera, if possible, to avoid the confounding influence of taxonomy.…”

Section: Discussionmentioning

confidence: 94%

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Amino acids in freshwater food webs: Assessing their variability among taxa, trophic levels, and systems

2020

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1. Although the amino acid composition of fishes and some marine invertebrates varies among taxa and systems, similar information is lacking for freshwater invertebrates. The objectives were to characterise and compare the amino acid composition among different aquatic species, dietary habits, and environmental conditions. 2. Benthic macroinvertebrates from different functional feeding groups (FFG), bulk zooplankton, biofilm, and fishes representing 12 families (21 genera or species)were collected from temperate lakes in eastern Canada during the summers of 2013 and 2014. Fifteen protein-bound amino acids, including thiols, were measured in whole invertebrates, biofilm, or fish muscle. We hypothesised that the amino acid composition will differ among species and systems.3. Multiple discriminant analyses revealed significant differences in the amino acid composition among species-based on varying percentages of cysteine (as cysteic acid) and histidine-and among FFG/trophic designations-based on histidine and lysine-where the primary consumers were more variable than the predators. 4. Overall, the results suggest that patterns were based on phylogenetics, biological characteristics, and the FFG/trophic designations of biota. 5. The within-taxon variability in composition was also related to differences among lakes. Characteristics of their environment, including lake pH and the food web structure (abundance and composition of taxa), probably influenced their dietary habits and amino acid composition of diet.6. These results expand the currently limited knowledge of the biochemical composition of freshwater biota and provide impetus for further studies on nutritional values in predator-prey relationships, trophic guilds, and the biomagnification of protein-bound contaminants through food webs. K E Y W O R D Samino acids, food webs, functional feeding groups, invertebrates, lakes 1102 |

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 94%

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Amino acids in freshwater food webs: Assessing their variability among taxa, trophic levels, and systems

2020

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“…Implications of these disruptions are hard to foresee because little is known of the function of these metabolites in the species studied here. Decreased amino acid levels have been associated with decreased growth rates in freshwater mussels 70 and alterations in amino acids of invertebrate species could possibly impact the fitness of higher consumers 85 . However, whether observed changes are linked to adverse effects requires further testing.…”

Section: Discussionmentioning

confidence: 99%

Wastewater effluent affects behaviour and metabolomic endpoints in damselfly larvae

Späth

Fick

McCallum

et al. 2022

Sci Rep

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Wastewater treatment plant effluents have been identified as a major contributor to increasing anthropogenic pollution in aquatic environments worldwide. Yet, little is known about the potentially adverse effects of wastewater treatment plant effluent on aquatic invertebrates. In this study, we assessed effects of wastewater effluent on the behaviour and metabolic profiles of damselfly larvae (Coenagrion hastulatum), a common aquatic invertebrate species. Four key behavioural traits: activity, boldness, escape response, and foraging (traits all linked tightly to individual fitness) were studied in larvae before and after one week of exposure to a range of effluent dilutions (0, 50, 75, 100%). Effluent exposure reduced activity and foraging, but generated faster escape response. Metabolomic analyses via targeted and non-targeted mass spectrometry methods revealed that exposure caused significant changes to 14 individual compounds (4 amino acids, 3 carnitines, 3 lysolipids, 1 peptide, 2 sugar acids, 1 sugar). Taken together, these compound changes indicate an increase in protein metabolism and oxidative stress. Our findings illustrate that wastewater effluent can affect both behavioural and physiological traits of aquatic invertebrates, and as such might pose an even greater threat to aquatic ecosystems than previously assumed. More long-term studies are now needed evaluate if these changes are linked to adverse effects on fitness. The combination of behavioural and metabolomic assessments provide a promising tool for detecting effects of wastewater effluent, on multiple biological levels of organisation, in aquatic ecosystems.

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“…Food quality, in its coarsest form, may be assessed by ecological stoichiometry (e.g., C : N) however, animals can be limited by availability of complex organic compounds such as amino acids (Dwyer et al 2018), sterols and fatty acids (Twining et al 2016). Within freshwater ecosystems, algae and, in particular, diatoms are considered high‐quality food resources for herbivorous taxa due to their high concentration of inorganic nutrients (nitrogen and phosphorous) and long–chain polyunsaturated fatty acids (e.g.…”

mentioning

confidence: 99%

Basal resource quality and energy sources in three habitats of a lowland river ecosystem

McInerney

Holt

Lester

et al. 2020

Limnology & Oceanography

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Understanding energy flow through ecosystems and among sub-habitats is critical for understanding patterns of biodiversity and ecosystem function. It can also be of considerable applied interest in situations where managing for connectivity among habitats is important for restoring degraded ecosystems. Here, we describe patterns of basal resource quality and identify primary basal energy sources in three habitats-river channels, anabranches and wetlands-of a lowland river floodplain in the Murray River catchment, Australia during a period of disconnected surface flow. We used a combination of stable isotope and fatty acid analyses to determine which basal resources were assimilated by the backswimmer Anisops thienemanni and the Eastern mosquitofish Gambusia holbrooki and assessed food quality across the three habitats. Seston was a primary basal resource for both animals in all three habitats, but was of higher quality within floodplain habitats than in the river channel. Although floodplain seston contained higher concentrations of essential fatty acids, fatty acid profiles of animals from different habitats remained similar. Our research suggests that inundation of floodplains and subsequent reconnection to the river could be valuable to afford riverine animals the opportunity to access high quality resources, but highlights a need to quantitatively assess the transfer of essential fatty acids between trophic levels to determine how much riverine animals are in fact limited by poorer quality food resources. We demonstrate the importance of estimating the quality of organic matter fluxes into food webs, and the potential role of targeted environmental flows to re-establish high quality energy pathways in riverine ecosystems. Food webs represent an important facet of ecosystem function and describe the energy pathways between resources and animals (Hladyz et al. 2012). Within freshwater ecosystems, research has focused on understanding the contribution and importance of terrestrially-and aquatically-derived carbon to food webs (e.g., Rees et al. 2020). Less attention has been oriented towards determining the quality of food resources (e.g., Guo 2018) and the dominant pathways for energy to reach higher trophic levels. Understanding which resources underpin food webs and factors influencing resource availability to animals is key to improving our capacity to gauge ecosystem health (Holland et al. 2020). Food quality, in its coarsest form, may be assessed by ecological stoichiometry (e.g., C : N) however, animals can be limited by availability of complex organic compounds such as amino acids (Dwyer et al. 2018), sterols and fatty acids (Twining et al. 2016). Within freshwater ecosystems, algae and, in particular, diatoms are considered high-quality food resources for herbivorous taxa due to their high concentration of inorganic nutrients (nitrogen and phosphorous) and longchain polyunsaturated fatty acids (e.g. Guo 2018). Some omega-3 (ω3) and omega-6 (ω6) polyunsaturated fatty acids, such as eicosapentaenoic (EPA;...

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A predicted change in the amino acid landscapes available to freshwater carnivores

Cited by 19 publications

References 81 publications

Amino acids in freshwater food webs: Assessing their variability among taxa, trophic levels, and systems

Amino acids in freshwater food webs: Assessing their variability among taxa, trophic levels, and systems

Wastewater effluent affects behaviour and metabolomic endpoints in damselfly larvae

Basal resource quality and energy sources in three habitats of a lowland river ecosystem

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