Life history traits and demographic parameters in the Keratella cochlearis (Rotifera, Monogononta) species complex

Cieplinski, Adam; Obertegger, Ulrike; Weisse, Thomas

doi:10.1007/s10750-017-3499-2

Cited by 13 publications

(7 citation statements)

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“…Amphoteric females occur in some rotifers and provide an additional mechanism to assure continued female parthenogenesis during sexual periods. These females produce haploid eggs developing into males or resting eggs, and also amictic eggs developing into females (reviews in Cieplinski, Obertegger, & Weisse, 2018;Gilbert, 2007;Rico-Martínez & Walsh, 2013). They usually are rare; for example, only 0.35% of females in a cultured population of Keratella cochlearis from Lake Tovel (northern Italy) were amphoteric (Cieplinski et al, 2018).…”

Section: Ecological Significance Of Some Female Parthenogenesis Durmentioning

confidence: 99%

“…These females produce haploid eggs developing into males or resting eggs, and also amictic eggs developing into females (reviews in Cieplinski, Obertegger, & Weisse, 2018;Gilbert, 2007;Rico-Martínez & Walsh, 2013). They usually are rare; for example, only 0.35% of females in a cultured population of Keratella cochlearis from Lake Tovel (northern Italy) were amphoteric (Cieplinski et al, 2018). However, they can be common in S. socialis (Bogoslavsky, 1958;Champ & Pourriot, 1977;Rico-Martínez & Walsh, 2013) and Conochiloides (now Conochilus) dossuarius (Bogoslavsky, 1960).…”

Section: Ecological Significance Of Some Female Parthenogenesis Durmentioning

confidence: 99%

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Variation in the life cycle of monogonont rotifers: Commitment to sex and emergence from diapause

Gilbert

2019

Freshwater Biology

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A review of research on life‐cycle events in field and laboratory populations of monogonont rotifers shows that there is great variation at multiple levels: (1) degree of sexual dimorphism; (2) occurrence and timing of sex; (3) propensity for sex during sexual periods; (4) factors controlling initiation of sex; and (5) timing and extent of emergence from diapause. There is no regular pattern where: (1) fertilised resting eggs hatch to start the growing season; (2) populations develop via female parthenogenesis during favourable conditions; and then (3) bisexual reproduction with resting‐egg production occurs during later, unfavourable conditions. Sexual reproduction in natural populations can occur throughout much of the growing season, be restricted to some period(s) during the growing season, or be completely absent. During sexual reproduction in both natural and laboratory populations, only some fraction of females produces males or resting eggs. This bet‐hedging strategy can prevent a population crash and permits future population growth via female parthenogenesis. Selection against sexual reproduction, and rapid loss of sex, can occur. Laboratory experiments with pond‐dwelling species have identified specific environmental factors that induce sex in different species: (1) increasing population density; (2) dietary tocopherol (vitamin E) and (3) long photoperiods. These factors generally are associated with favourable conditions for population growth and production of energy‐rich resting eggs: (1) large population size; (2) high probability of contacts between males and fertilisable females; and (3) nutritious diets. Endogenous factors can inhibit responses to these environmental inducers, and thus favour female parthenogenesis. The timing of resting‐egg hatching depends on: (1) occurrence of specific environmental conditions; (2) the minimum duration of obligate diapause; and (3) the genotype and physiology of females producing resting eggs. Hatching may occur shortly after oviposition, after a long diapause before or at the start of a new growing season, or throughout the growing season. Hatching can be massive and contribute substantially to population growth and genetic diversity. Areas for future research include: (1) determining the timing and extent of sex and resting‐egg hatching in more natural populations, especially those that are marine, benthic, sessile, and interstitial; and (2) identifying environmental and physiological factors controlling these events.

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Section: Ecological Significance Of Some Female Parthenogenesis Durmentioning

confidence: 99%

Section: Ecological Significance Of Some Female Parthenogenesis Durmentioning

confidence: 99%

Variation in the life cycle of monogonont rotifers: Commitment to sex and emergence from diapause

Gilbert

2019

Freshwater Biology

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“…This is the first study to contribute evidence of genetic differences in temperature tolerance between two neighboring populations of K. cochlearis with location-specific temperature variations. To date, only one study has demonstrated that genetically different haplotypes of K. cochlearis also differ in their growth rate and in other demographic parameters (Cieplinski et al, 2018). The authors had investigated differences between two ESUs of K. cochlearis at the same temperature (14.5°C).…”

Section: Different Responses Of Fitness To Temperaturementioning

confidence: 99%

“…Moreover, mitonuclear discordance in the delimitation of ESUs was recently reported for K. cochlearis species complex (Obertegger et al, 2018). Therefore, the identification of ESUs based on DNA sequences alone is problematic, and usually requires morphological, demographic and/or ecological evidence (Cieplinski et al, 2018;Obertegger et al, 2018). However, despite ample genetic variation among genotypes and populations, there has been no published research on the local adaptability of this species complex.…”

Section: Introductionmentioning

confidence: 99%

Intraspecific variation in sensitivity to food availability and temperature-induced phenotypic plasticity in the rotiferKeratella cochlearis

Ramos–Rodríguez

Moreno

Conde‐Porcuna

2020

Journal of Experimental Biology

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Organisms with wide environmentally-induced morphological plasticity and cosmopolitan distribution, e.g., the common freshwater rotifer Keratella cochlearis, are ideal models to study the evolution of plastic polymorphisms and the capacity of zooplankton to adapt to local selection conditions. We investigated population-level differences (population-by-environment interaction) in sensitivity to food availability and temperature-induced phenotypic plasticity between two clones of K. cochlearis (Gosse) isolated from neighboring populations in Ruidera Natural Park (Spain) with different trophic statuses: Tinaja (TIN) lake (mesotrophic) and Cueva Morenilla (MOR) lake (eutrophic). Using common-garden experiments, each clone proved to have a different sensitivity to food availability, with substantial phenotypic differences between them. When rotifers grew at moderate temperature (15.6°C), low food levels were more efficiently used by the TIN versus MOR clone, whereas high food levels were more efficiently used by the MOR versus TIN clone. The posterior spine was much longer and the lorica wider in the TIN versus MOR clone, with no difference in lorica length. Phylogenetic analysis based on COI sequences showed that both populations have the same haplotype. This is the first study to show possible local adaptation by a rotifer species to habitats that consistently differ in food availability. We also detected an intriguing deviation from the expected negative relationship between posterior spine length and temperature. Our experimental results indicate that intermediate temperatures may activate the gene responsible for spine elongation in K. cochlearis. This suggests that rotifers in nature could use water temperature as proxy signal of a change in predation risk before defense is needed.

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“…The posterior spine presents high morphological variations ranging from its total absence to a large and rigid spine (Segers & De Smet, 2008). The factors related to this variation are temperature, trophic conditions, mutation accumulation, and predator presence (Stemberger & Gilbert, 1987;Galkovskaja & Mityanina, 1989;Bielanska-Grajner, 1995;Cieplinski et al, 2018). However, recent studies have demonstrated that some pollutants can cause a variety of morphological and reproductive effects on different groups of zooplankton (Elmoor-Loureiro, 2004;Zurek, 2006;Alvarado-Flores et al, 2015;Pérez-Yáñez et al, 2019).…”

mentioning

confidence: 99%

Morphological alterations in <i>Keratella</i> spp. (Monogononta: Brachionidae) from Lake Patzcuaro, Michoacan

Rodríguez¹,

Huerto-Delgadillo²,

Torres-Sánchez³

et al. 2019

Cic. Ocea.

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Recientemente se registró en la zona del Embarcadero del Lago de Pátzcuaro, Michoacán, que algunos rotíferos del género Keratella presentaron alteraciones morfológicas. Se cuantificó que el 0.019% de la población de Keratella cochlearis y el 0.008% de K. americana presentaron alteraciones morfológicas en distintas espinas y ninguna presentó huevos. Estas anormalidades pudieran estar relacionadas con diferentes tipos de contaminantes en el Embarcadero, por lo que podrían ser consideradas como bioindicadores de toxicidad.

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Life history traits and demographic parameters in the Keratella cochlearis (Rotifera, Monogononta) species complex

Cited by 13 publications

References 93 publications

Variation in the life cycle of monogonont rotifers: Commitment to sex and emergence from diapause

Variation in the life cycle of monogonont rotifers: Commitment to sex and emergence from diapause

Intraspecific variation in sensitivity to food availability and temperature-induced phenotypic plasticity in the rotiferKeratella cochlearis

Morphological alterations in <i>Keratella</i> spp. (Monogononta: Brachionidae) from Lake Patzcuaro, Michoacan

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