The effect of medium on selected life-history traits in three clones of Lecane inermis (Rotifera) from activated sludge

Pajdak‐Stós, Agnieszka; Kocerba, Wioleta; Fiałkowska, Edyta; Klimek, Beata; Fyda, Janusz

doi:10.2166/wst.2011.404

Cited by 3 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrary to chemostat conditions, such a culture method eliminates the risk of rapid selection against sex. These lineages were subjected to a variety of conditions, including a wide range of temperature, starvation periods, media, and feeding regimes Pajdak-St os et al 2011), and only one lineage was observed to produce males and resting eggs.…”

Section: Origin Of Lineagesmentioning

confidence: 99%

Why is sex so rare in Lecane inermis (Rotifera: Monogononta) in wastewater treatment plants?

Pajdak‐Stós

Fiałkowska

Kocerba‐Soroka

et al. 2014

Invertebrate Biology

Self Cite

View full text Add to dashboard Cite

The monogonont rotifer Lecane inermis is commonly known as a facultative parthenogen. Unexpectedly, among numerous lineages we isolated from wastewater treatment plants (WWTP), only one was capable of sexual reproduction. We investigated why sex was so rare among L. inermis in WWTP. The reproductive modes of lineages derived from the sexual lineage were examined. Among all lineages, the fraction of those reproducing only asexually for 14 d was 0.39. In the subsequent round, the fraction of asexual lineages reached 0.61. The population growth rate of the parthenogenetic lineages was significantly higher than that of the sexual lineages. We simulated the fate of rotifer populations in WWTP by removing 10% of the experimental cultures each day. After 10 d of these conditions, the mean number of females was greater in parthenogenetic than in sexual lineages. After 20 d, only solitary dormant eggs remained in the sexual lineages. It therefore appears that the loss of sex may be attributed to the specific conditions of the WWTP. When there is no risk of desiccation and no need for dormancy, the fast-growing parthenogens outcompete lineages investing in costly sex. Furthermore, even if some resting eggs were deposited, they would be washed out from the system with the excess sludge.

show abstract

Section: Origin Of Lineagesmentioning

confidence: 99%

Why is sex so rare in Lecane inermis (Rotifera: Monogononta) in wastewater treatment plants?

Pajdak‐Stós

Fiałkowska

Kocerba‐Soroka

et al. 2014

Invertebrate Biology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Then, 1 ml of aluminium chloride, AlCl 3 , or aluminium sulphate, Al 2 (SO 4 ) 3 , solution was added. The Al-salt solutions were enriched with molasses (Greenland Technology, Poland) as a medium [14]. The culture plates were incubated at 8, 15 and 20°C, and the number of alive and dead rotifers was checked after 24 h of exposure.…”

Section: Methodsmentioning

confidence: 99%

The Toxicity of Aluminium Salts to Lecane Inermis Rotifers: Are Chemical and Biological Methods Used to Overcome Activated Sludge Bulking Mutually Exclusive?

Klimek¹,

Fiałkowska²,

Fyda³

et al. 2013

Archives of Environmental Protection

Self Cite

View full text Add to dashboard Cite

Abstract:The aim of this study was to assess the effects of two fl occulants that are often used to overcome activated sludge bulking problems -aluminium chloride, AlCl 3 , and aluminium sulphate, Al 2 (SO 4 ) 3 -on Lecaneinermis (Rotifera, Monogononta) at three different temperatures: 8, 15 and 20°C. The mean EC50 value (effective concentration, mg dm -3 ) calculated for the 24 h mortality test was 0.012 mg Al 3+ dm -3. Next, the effects of low concentrations of the Al-salts on the population development from single individuals (parthenogenetic females) were tested in a 21-day experiment. At concentrations as low as EC4.8 and EC0.48, both Al-salts affected rotifer population negatively. However, temperature was the most pronounced factor that modifi ed the toxicity of the Al-salts to the rotifers. On the 12 th day of the experiment, there were signifi cant interactions between temperature and the Al-salts, indicating that the chemicals were more toxic to the rotifers at 20°C than at lower temperatures. The weaker rotifers sensitivity to Al-salts (especially to AlCl 3 ) in temperatures below 15°C, when the biggest problems associated with sludge bulking occurs,may means use both rotifers and chemicals reasonable and effective.

show abstract

“…Both species of rotifers were reported to occur in activated sludge [16][17][18][19]. L. inermis is well documented to feed on biofilm, unicellular, and filamentous bacteria [20][21][22][23],…”

Section: Introductionmentioning

confidence: 99%

The Relations Between Predatory Fungus and Its Rotifer Preys as a Noteworthy Example of Intraguild Predation (IGP)

2019

Self Cite

View full text Add to dashboard Cite

Intraguild predation (IGP) is a widespread interaction combining predation and competition. We investigated a unique IGP example among predacious fungus Zoophagus sp. and two rotifers, the predacious Cephalodella gibba and the common prey Lecane inermis. We checked the influence of the fungus on its competitor C. gibba and their joint influence on shared prey L. inermis, and the impact of the competitive predator on the growth of predacious fungus. The experiment on grown mycelium showed that Zoophagus strongly, negatively influences the growth of C. gibba (intermediate consumer) whose number did not increase throughout the experiment. The intermediate consumer was also trapped by Zoophagus and become extinct when it was its only prey, whereas in the absence of the fungus and with unlimited access to prey, its number grew quickly. As only few C. gibba were trapped by fungi when common preys were present, competition for food seems to have stronger effect on intermediate consumer population than predation. The experiment with conidia of the fungus showed that intermediate consumer significantly limits the growth of Zoophagus by reducing the number of available prey. It was observed that although the fungus can trap C. gibba, the latter does not support its growth. Trapping the intermediate consumer might serve to eliminate a competitor rather than to find a source of food. The chances of survival for L. inermis under the pressure of the two competing predators are scarce. It is the first example of IGP involving representatives of two kingdoms: Fungi and Animalia.

show abstract

The effect of medium on selected life-history traits in three clones of Lecane inermis (Rotifera) from activated sludge

Cited by 3 publications

References 10 publications

Why is sex so rare in Lecane inermis (Rotifera: Monogononta) in wastewater treatment plants?

Why is sex so rare in Lecane inermis (Rotifera: Monogononta) in wastewater treatment plants?

The Toxicity of Aluminium Salts to Lecane Inermis Rotifers: Are Chemical and Biological Methods Used to Overcome Activated Sludge Bulking Mutually Exclusive?

The Relations Between Predatory Fungus and Its Rotifer Preys as a Noteworthy Example of Intraguild Predation (IGP)

Contact Info

Product

Resources

About