<i>Daphnia</i> performance on diets containing different combinations of high‐quality algae, heterotrophic bacteria, and allochthonous particulate organic matter

Wenzel, Anja; Vrede, Tobias; Jansson, Mats; Bergström, Ann‐Kristin

doi:10.1111/fwb.13626

Cited by 18 publications

(17 citation statements)

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“…Thus, an explanation for the observed low phytoplankton resource use, as well as biomass responses in zooplankton could be the dominance of phytoplankton species with reduced edibility, especially at intermediate lake DOC where the observed colony forming chlorophytes dominated (in support of prediction 1b). It is also possible that allochthonous detritus particles through physical inference further reduced the capability of zooplankton to utilize the phytoplankton (Wenzel et al, 2021).…”

Section: Bottom-up Effects On Zooplankton Biomassmentioning

confidence: 99%

“…Their biomass development depends on the quantity and quality of their food resources (Persson et al, 2007;Müller-Navarra, 2008;Brett et al, 2009), and fish predation (Hessen et al, 1995). The diet of zooplankton contains a mixture of phytoplankton, bacteria and detritus of different mineral and biochemical composition (Müller-Navarra, 2008;Persson et al, 2007;Brett et al, 2009;Taipale et al, 2016;Wenzel et al, 2021). Phytoplankton are considered as high-quality food for zooplankton (Brett et al, 2009(Brett et al, , 2017Taipale et al, 2013;Wenzel et al, 2021) depending on community composition and fatty acid composition (Taipale et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The diet of zooplankton contains a mixture of phytoplankton, bacteria and detritus of different mineral and biochemical composition (Müller-Navarra, 2008;Persson et al, 2007;Brett et al, 2009;Taipale et al, 2016;Wenzel et al, 2021). Phytoplankton are considered as high-quality food for zooplankton (Brett et al, 2009(Brett et al, , 2017Taipale et al, 2013;Wenzel et al, 2021) depending on community composition and fatty acid composition (Taipale et al, 2013). The relationships between phytoplankton (biomass and production) and lake DOC appears to be unimodal because of the influence of DOC on light availability (negative effect) and nutrient availability (positive effect) (Kelly et al, 2018;Bergström & Karlsson, 2019;Vasconcelos et al, 2019), with the magnitude of the phytoplankton peak determined by the DOC:nutrient stoichiometry (Kelly et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Effects of nitrogen enrichment on zooplankton biomass and N:P recycling ratios across a DOC gradient in northern-latitude lakes

et al. 2021

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We used data from whole-lake studies to assess how changes in food quantity (phytoplankton biomass) and quality (phytoplankton community composition, seston C:P and N:P) with N fertilization affect zooplankton biomass, community composition and C:N:P stoichiometry, and their N:P recycling ratio along a gradient in lake DOC concentrations. We found that despite major differences in phytoplankton biomass with DOC (unimodal distributions, especially with N fertilization), no major differences in zooplankton biomass were detectable. Instead, phytoplankton to zooplankton biomass ratios were high, especially at intermediate DOC and after N fertilization, implying low trophic transfer efficiencies. An explanation for the observed low phytoplankton resource use, and biomass responses in zooplankton, was dominance of colony forming chlorophytes of reduced edibility at intermediate lake DOC, combined with reduced phytoplankton mineral quality (enhanced seston N:P) with N fertilization. N fertilization, however, increased zooplankton N:P recycling ratios, with largest impact at low DOC where phytoplankton benefitted from light sufficiently to cause enhanced seston N:P. Our results suggest that although N enrichment and increased phytoplankton biomass do not necessarily increase zooplankton biomass, bottom-up effects may still impact zooplankton and their N:P recycling ratio through promotion of phytoplankton species of low edibility and altered mineral quality.

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Section: Bottom-up Effects On Zooplankton Biomassmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of nitrogen enrichment on zooplankton biomass and N:P recycling ratios across a DOC gradient in northern-latitude lakes

et al. 2021

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“…To grow and reproduce efficiently, zooplankton require sufficient phytoplankton biomass (Brett et al, 2009; Taipale et al, 2013; Wenzel et al, 2021) and phytoplankton mineral quality (Persson et al, 2007; Sterner & Hessen, 1994). Several empirical and model studies have illustrated that the relationship between phytoplankton biomass and lake DOC appears to be unimodal.…”

Section: Introductionmentioning

confidence: 99%

Biomass, community composition and N:P recycling ratios of zooplankton in northern high‐latitude lakes with contrasting levels of N deposition and dissolved organic carbon

et al. 2022

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1. Global changes are causing decreases in inorganic nitrogen (N) concentrations, increases in coloured dissolved organic carbon (DOC) concentrations, and decreases in dissolved inorganic N to total phosphorus ratios (DIN:TP) in northern lakes. The effects of these changes on phytoplankton and zooplankton biomass and the N:P recycling ratio of zooplankton remain unresolved.2. In 33 Swedish headwater lakes across subarctic-to-boreal gradients with different levels of N deposition (low N in the north [Västerbotten, boreal; Abisko, subarctic] vs. high N in the south [Värmland, boreal; Jämtland, subarctic]), we measured water chemistry, phytoplankton biomass (chlorophyll-a [Chl-a], Chla:TP), seston mineral quality (C:P, N:P), as well as zooplankton biomass, community composition, and C:N:P stoichiometry. We estimated nutrient imbalances and the N:P recycling ratios of zooplankton using ecological stoichiometry models.3. There was a large-scale gradient from low lake DIN and DIN:TP in the north to high DIN and DIN:TP in the south, with lower DIN:TP in lakes coinciding with higher DOC within each region. Lower lake DIN was associated with lower phytoplankton biomass (lower Chl-a:TP). Lower lake DIN:TP was associated with richer seston mineral quality (lower seston C:P and N:P) and higher zooplankton biomass.4. Zooplankton community composition differed in the north vs. south, with a dominance of N-requiring calanoid copepods with high N:P in the north and Prequiring cladocerans with low N:P in the south. Also, greater differences in zooplankton community composition were found between subarctic regions (with lower DOC) than between boreal regions (with higher DOC), suggesting that increases in lake DOC and associated declines in lake DIN:TP reduce differences in zooplankton community composition.5. The combination of lower lake DIN, higher lake DOC, and lower lake DIN:TP led to reduced zooplankton N:P recycling ratios, possibly by reducing sestonThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…Jonczyk et al [27] reviewed notions about culture and maintenance in the laboratory and suggested that survival and reproduction in Daphnia were improved on mixed diets comparatively to a single algal diet. In fact, several studies addressed the effects of mixed diets on Cladocera's fitness [28][29][30], while oth-ers evaluate alternative food sources that complement and diversify their diet [31,32].…”

Section: Introductionmentioning

confidence: 99%

Does a Diet Rich in the Bacterium Rhodopirellula rubra Improve Daphnia magna Performance?

Marinho¹,

Jesus²,

Spencer³

et al. 2022

Front. Biosci. (Elite Ed)

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Background: In the wild various organisms contribute to daphnids diet. This study, intendeds to evaluate the potential of the concentration of Rhodopirellula rubra as a single or supplementary food source for Daphnia magna. Methods: Feeding assays were performed according to standard guidelines for chronic assays (21 days), and life-history parameters and several biomarkers (protein content, oxidative stress, energetic reserves and pigments) were measured. Five food regimens were conducted with 20 individual replicates (A -R. subcapitata; 0.2 -suspension of R. rubra at 0.2 arbitrary units (AU); 0.4 -suspension of R. rubra at 0.4 AU; 0.2+A -suspension of R. rubra at 0.2+alga; 0.2+A-suspension of R. rubra at 0.4 AU + alga). Additionally, the effects of three diets (A, 0.2, and 0.2+A) on the longevity of D. magna were assessed. Results: The five diets showed a different C, N, and carotenoids composition, with an increase in the mixed diets. The results confirmed that the mixed diets improved D. magna life-history parameters. A decrease in glycogen, and the increase of haemoglobin, protein, and gluthione-S-transferase (GST) were observed. Furthermore, D. magna fed with bacterial single diets, presented worsen life history parameters and a decrease in the protein content. An induction of oxidative stress response (increased catalase and GST), and a significant decrease in lipid peroxidation and an accumulation of glycogen and carotenoids were observed. Overall, an increase in the amount of R. rubra provided to D. magna, from 0.2 AU to 0.4 AU, negatively impacted daphnid performance. No significant effects on Daphnia longevity (a 110-day assay) were observed among the three diets tested. However, a significant survival percentage and fertility (cumulative offspring is more than twice) was observed when D. magna was fed with the mixed diet. Conclusions: Results demonstrated that different diets provided a nutritional diversified food to the daphnids that induced differences in D. magna performance. The mixed diets proved to be beneficial (with increase in offspring) on D. magna performance, independently of the bacterial concentration tested. When in single diet, bacterial concentration is not nutritionally sufficient to raise D. magna even when in increased concentration.

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Daphnia performance on diets containing different combinations of high‐quality algae, heterotrophic bacteria, and allochthonous particulate organic matter

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 18 publications

References 71 publications

Effects of nitrogen enrichment on zooplankton biomass and N:P recycling ratios across a DOC gradient in northern-latitude lakes

Effects of nitrogen enrichment on zooplankton biomass and N:P recycling ratios across a DOC gradient in northern-latitude lakes

Biomass, community composition and N:P recycling ratios of zooplankton in northern high‐latitude lakes with contrasting levels of N deposition and dissolved organic carbon

Does a Diet Rich in the Bacterium Rhodopirellula rubra Improve Daphnia magna Performance?

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