Setae thickening in Daphnia magna alleviates the food stress caused by the filamentous cyanobacteria

Wejnerowski, Łukasz; Cerbin, Slawek; Dziuba, Marcin Krzysztof

doi:10.1007/s10452-017-9631-6

Cited by 7 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…D. longispina is able better to break apart cyanobacterial trichomes when the water temperature rises. D. magna morphologically adapts to high-trophic water bodies dominated by filamentous blue-green algae, due to the thickening of the filter apparatus bristles [74]. Species of the genus Microcystis affect both the phytoplankton community itself, due to the deterioration of illumination and the zooplankton and ichthyofauna, due to the release of toxins and changes in pH [75].…”

Section: Species Composition and Quantitative Variablesmentioning

confidence: 99%

“…In 1985, when D. magna dominated in zooplankton, Bosmina was also absent [26]. D. magna is able to minimize the food stress caused by the filamentous cyanobacteria by setae thickening [74]. Although B. longirostris is common species in cyanobacterial blooms [81], it is probably unable to compete with such a large cladoceran species as D. magna.…”

Section: Species Composition and Quantitative Variablesmentioning

confidence: 99%

See 1 more Smart Citation

Planktonic Invertebrates in the Assessment of Long-Term Change in Water Quality of the Sorbulak Wastewater Disposal System (Kazakhstan)

Krupa

Barınova

Romanova

et al. 2020

Water

View full text Add to dashboard Cite

The multicomponent composition of wastewater makes it challenging to assess its quality objectively, but the last one is a prerequisite for the safe re-use of wastewater. The solution to this problem should be aimed at finding criteria that make it possible to increase the objectivity of assessing the water quality of reservoirs with multicomponent pollution. This work analyzes the water quality of the Sorbulak wastewater disposal system in the summer of 2017, based on chemical variables and zooplankton structure and assess the long-term changes in the water quality of Sorbulak. According to the Kruskal–Wallis test, in 2017, the differences between the studied water bodies in the content of nutrients and heavy metals were mostly insignificant. From 2000–2002 to 2017, nitrate, nitrite nitrogen, and heavy metals in Sorbulak significantly decreased. Zooplankton communities consisted of a relatively small number of eurybiontic species resistant to environmental factors. The variability of the quantitative variables of zooplankton was associated with the nutrients. Males dominated the population of the cyclopoid copepods Acanthocyclops trajani. In 2000–2002 individuals with morphological anomalies were found in cyclopoid copepods populations, but were absent in 2017. The appearance of individuals with morphological anomalies was associated with copper or lead. The chemical data and structure of zooplankton communities indicated that the toxic pollution of Sorbulak decreased by 2017 compared to 2000–2002. Our results demonstrate that the structural variables of zooplankton communities could be successfully used to assess the water quality of water bodies with mixed pollution. We recommend using not only the traditional set of biological variables (abundance, biomass, diversity indices, and the average mass of an individual), but also data on the structure of species dominance, the sex structure of copepod populations, and the presence of individuals with morphological anomalies for monitoring of water bodies with mixed pollution.

show abstract

Section: Species Composition and Quantitative Variablesmentioning

confidence: 99%

Section: Species Composition and Quantitative Variablesmentioning

confidence: 99%

Planktonic Invertebrates in the Assessment of Long-Term Change in Water Quality of the Sorbulak Wastewater Disposal System (Kazakhstan)

Krupa

Barınova

Romanova

et al. 2020

Water

View full text Add to dashboard Cite

show abstract

“…This issue needs more attention in the future, as we do not yet know the detailed mechanism(s) that allow D. lumholtzi to mitigate mechanical interference of the filtration process without fitness losses at elevated temperatures. Other mechanisms, such as adaptive alterations of filter‐screen morphology, which are commonly observed in Daphnia experiencing food stress caused by filamentous cyanobacteria (Bednarska & Dawidowicz, ; Ghadouani & Pinel‐Alloul, ; Macháček, ; Repka, Veen, & Vijverberg, ; Wejnerowski, Cerbin, & Dziuba, ) provide one example of the way in which Daphnia might adapt and maintain fitness.…”

Section: Discussionmentioning

confidence: 99%

Temperature elevation reduces the sensitivity of invasive cladoceran Daphnia lumholtzi to filamentous cyanobacterium Raphidiopsis raciborskii

2020

View full text Add to dashboard Cite

Exotic cladoceran Daphnia lumholtzi is a highly invasive species in the north and south American continents and can potentially also invade European freshwaters and outcompete native Daphnia populations. However, European waterbodies are frequently dominated by less edible filamentous cyanobacteria including also invaders such as Raphidiopsis raciborskii, which might affect the fitness of D. lumholtzi. Furthermore, temperature may influence the sensitivity of D. lumholtzi to R. raciborskii filaments. In this study, we determined whether the presence of R. raciborskii could obstruct the invasion of Europe by D. lumholtzi, through reducing its fitness, and whether this depends on temperature. We compared the population growth rate (r) and the somatic growth rate of D. lumholtzi maintained at two temperatures (20 or 26°C) and fed with two diets: green microalgae alone or green microalgae mixed with filaments of R. raciborskii. Three clones of D. lumholtzi were used to evaluate potential variation in response to the treatments among different clones. At 20°C, the population growth rate of D. lumholtzi fed with cyanobacterial filaments declined sharply. This reduction was caused by increased egg abortion, egg degeneration, and mortality of newborn daphnids. At 26°C, R. raciborskii lost its harmful effect on the population growth of D. lumholtzi. The presence of cyanobacteria did reduce the somatic growth rate of D. lumholtzi at both temperatures and in all three clones except for one that had a similar somatic growth rate on both diets at 26°C. The presence of filamentous cyanobacteria does affect growth in D. lumholtzi and may thereby substantially reduce its invasive potential, but only at lower temperatures. Therefore, the presence of filamentous cyanobacteria may not present an obstacle to the invasion of Europe by D. lumholtzi in a warmer future climate.

show abstract

“…This effect is consistent with previous observations that these taxa are favoured by conditions characterised by decreasing phosphorus concentration in epilimnetic layers and sharp transitions between nutrient‐poor surface waters and nutrient‐rich into deep waters (Anneville et al, ; Reynolds, ). Filamentous phytoplankton, such as Oscillatoria and Mougeotia , are generally considered inedible to Daphnia , either because they are too large, or because filaments can clog the meshes of the filtration apparatus and decrease the food ingestion rate (Wejnerowski, Cerbin, & Dziuba, ). Therefore, we suggest that in Lake Lugano early TP depletion in epilimnetic layers heightened Daphnia MSD (i.e.…”

Section: Discussionmentioning

confidence: 99%

Causes of Daphnia midsummer decline in two deep meromictic subalpine lakes

2019

View full text Add to dashboard Cite

Daphnia are key organisms in pelagic food webs, acting as a food resource for fish and predatory zooplankton and regulating phytoplankton through grazing. Its population dynamic follows regular seasonal patterns, with spring peaks followed by summer population declines (midsummer declines, MSDs). Midsummer declines show high inter‐annual variation, which has been attributed to different causes. However, the mechanisms controlling the MSD remain poorly understood, especially in deep stratified lakes. We tried to disentangle the factors causing Daphnia MSDs in Lake Lugano and Lake Iseo (in Switzerland and Italy), two deep peri‐alpine lakes with similar trophic status and vertical mixing dynamics, characterised by phosphorus accumulation in the hypolimnion and variable mixing during late‐winter turnovers. Specifically, we assessed the effects of three different hypothetical pathways according to which: (1) winter air temperature controls MSDs by influencing mixing depth during turnovers and epilimnetic phosphorus replenishment; (2) vernal air temperature influences MSD by accelerating the timing of spring population peak; and (3) summer temperature influences MSDs by increasing fish predation. We assessed the relative strength of these pathways using structural equation modelling on long‐term datasets for the two lakes (29 years for Lake Lugano and 19 years for Lake Iseo). Between the hypothesised pathways, the one driven by winter air temperature (through P replenishment) influenced Daphnia abundance in spring in both lakes, but the effects propagated to summer Daphnia abundance only in Lake Lugano. Additionally, summer Daphnia abundance was influenced by the summer air temperature through a positive (although weak) effect. By comparison, vernal air temperature had no detectable effects on summer Daphnia abundance. The results revealed marked differences between the meromictic study lakes and the shallow hypertrophic water bodies that were the focus of previous research on Daphnia MSD, and also between the two study lakes. The influence of epilimnetic P replenishment on the summer Daphnia abundance in Lake Lugano, which was recovering from past eutrophication, may have reflected the greater susceptibility of deep, stratified lakes to P depletion after spring compared to shallow hypertrophic lakes or reservoirs. This effect might not have been detected in Lake Iseo because P was more consistently depleted during the study period (i.e. variance in the predictor was too low to detect an effect). This study highlighted the complexity of the effects of climate variability on Daphnia MSD in deep lakes, showing that the responses can differ even between two neighbouring lakes with similar vertical mixing dynamics and trophic status. At the same time, the results suggest that future increases in winter air temperature, caused by global warming, may cause critically low densities of Daphnia during spring and summer and compromise the ability of zooplankton to control phytoplankton biomass.

show abstract

Setae thickening in Daphnia magna alleviates the food stress caused by the filamentous cyanobacteria

Cited by 7 publications

References 38 publications

Planktonic Invertebrates in the Assessment of Long-Term Change in Water Quality of the Sorbulak Wastewater Disposal System (Kazakhstan)

Planktonic Invertebrates in the Assessment of Long-Term Change in Water Quality of the Sorbulak Wastewater Disposal System (Kazakhstan)

Temperature elevation reduces the sensitivity of invasive cladoceran Daphnia lumholtzi to filamentous cyanobacterium Raphidiopsis raciborskii

Causes of Daphnia midsummer decline in two deep meromictic subalpine lakes

Contact Info

Product

Resources

About