Differential evolution of lifespan and fecundity between asexual and sexual females in a benign environment

Smith, Hilary A.; Snell, Terry W.

doi:10.1002/iroh.201301711

Cited by 21 publications

(9 citation statements)

References 54 publications

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“…A high propensity for sexual reproduction is also known to trade off with rapid clonal population growth in rotifers (Gabaldón, Carmona, Montero-Pau, & Serra, 2015;Gilbert, 2010;Smith & Snell, 2014;Stelzer, 2011). These observations were obtained in semi-continuous laboratory culture conditions.…”

Section: Discussionmentioning

confidence: 88%

“…Life history theory predicts that long development times and low rates of reproductive output have a negative impact on population growth rates. A high propensity for sexual reproduction is also known to trade off with rapid clonal population growth in rotifers (Gabaldón, Carmona, Montero‐Pau, & Serra, ; Gilbert, ; Smith & Snell, ; Stelzer, ).…”

Section: Discussionmentioning

confidence: 99%

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Patterns of differentiation in the life history and demography of four recently described species of the Brachionus calyciflorus cryptic species complex

et al. 2019

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Brachionus calyciflorus is arguably the most studied freshwater monogonont rotifer. Although it has been recognised as a cryptic species complex for more than a decade, a formal (re‐)description of the four species known so far (B. calyciflorus, Brachionus dorcas, Brachionus elevatus, and Brachionus fernandoi) has only recently been made. Information on the ecology of these species is very scant and fragmented. The aim of this study was to test for ecological divergence between these four species, specifically their life history strategy and population demography. We conducted a life history experiment using 12–16 genotypes per species. For each species, genotypes were extracted from at least three different natural populations. In addition, we performed population‐level culture experiments with the aim to compare population growth rates and demographic structure of experimental populations among species. Finally, we searched the literature for life history studies with molecular data allowing retrospective species identification. We found pronounced differences in life history traits between B. fernandoi and the other three species. B. fernandoi had higher egg and juvenile development times and a lower egg production rate and mictic ratio. We detected no significant life history differences among B. calyciflorus, B. elevatus, and B. dorcas. Population growth rates of B. fernandoi and B. calyciflorus were higher than those of B. elevatus and B. dorcas. Life history divergence resulted in marked differences in the demographic structure of populations. Populations of B. fernandoi contained larger fractions of pre‐reproductive females and lower fractions of adult females with sexual eggs than populations of B. calyciflorus, B. elevatus, and B. dorcas. Mortality was found to be highest in B. elevatus and lowest in B. calyciflorus populations. Our results show that a reverse taxonomy approach is powerful in revealing sources of variation in ecologically relevant traits of cryptic species, such as life history and demographic structure. Explicit consideration of this variation is crucial for future studies of their dynamics in natural communities.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Patterns of differentiation in the life history and demography of four recently described species of the Brachionus calyciflorus cryptic species complex

et al. 2019

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“…Monogonont rotifers act as a very useful and successful model for microevolutionary studies (Fussmann, 2011;Declerck & Papakostas, 2017). As reviewed by Declerck & Papakostas, (2017, this issue), experimental evolution was previously used in the case of rotifers to test hypotheses on the evolution of sex (Becks & Agrawal, 2010, 2012Fussmann et al, 2003), the combination of different life-history traits (Stelzer, 2011;Smith & Snell, 2014), and the adaptation to food composition (Declerck et al, 2015). The most recent studies using experimental evolution in rotifers focus on sexual reproduction (Haafke et al, 2016) and bethedging strategy (Tarazona et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Empirical evidence for fast temperature-dependent body size evolution in rotifers

Walczyńska

Franch‐Gras

2017

Hydrobiologia

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Organisms tend to decrease in size with increasing temperature by phenotypic plasticity (the temperature-size rule; ectotherms) and/or genetically (Bergmann's rule; all organisms). In this study, the evolutionary response of body size to temperature was examined in the cyclically parthenogenetic rotifer Brachionus plicatilis. Our aim was to investigate whether this species, already known to decrease in size with increasing temperature by phenotypic plasticity, presents a similar pattern at the genetic level. We exposed a multiclonal mixture of B. plicatilis to experimental evolution at low and high temperature and monitored body size weekly. Within a month, we observed a smaller size at higher temperature, as compared to body size at lower temperature. The pattern was consistent for the size of both mature females and eggs; rotifers kept at high temperature evolved to be on average 14% (after 2 weeks) and 3% (after 3 weeks) smaller than the ones kept at low temperature (10 and 5% in the case of eggs, respectively). We therefore found that B. plicatilis is genetically programmed to adjust its body size-toenvironmental temperature.

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“…g. Aging in rotifers: because there is a great diversity in aging rates among species, geographical populations, and mutants within species, Smith and Snell [202] designed an experiment to follow rotifers longevity through 84 generations (about 1 year). Their results show that optimal growing conditions (e.g., constant food supply) altered life span and can reduce aging, which could be evolutionary adjustable, with selection working primarily on the length of the reproductive life span.…”

Section: Perspectives For Future Studies Regarding the Importance Of mentioning

confidence: 99%

Rotifers as Models in Toxicity Screening of Chemicals and Environmental Samples

Rico‐Martínez¹,

Arzate-Cárdenas²,

Robles-Vargas³

et al. 2016

Invertebrates - Experimental Models in Toxicity Screening

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An important objective of aquatic ecotoxicology is to determine the effects of toxic compounds in organisms that play a central role in aquatic communities where rotifers have a large impact on several important ecological processes. The contribution of the rotifers to secondary production in many aquatic communities is substantial as they are often the larger fraction of zooplankton biomass at certain times of the year. In addition to the importance of their ecological roles in aquatic communities, the rotifers are attractive organisms for ecotoxicological studies by its short life cycles and rapid reproduction, their small size, and little volumes needed for culture and toxicity assays. The main end points used in ecotoxicological studies are mortality, reproduction, behavior, and biomarkers. Such parameters are included in international regulations from all over the world, where different species are used to evaluate the effect of environmental samples or chemical compounds. The high diversity of rotifers is an important issue because it can modify their relative susceptibility to toxicants. Thus, more studies are needed to know the relations and mechanisms involved in clonal variation, sensitivity, and development, which can be all assessed by state-of-the-art procedures.

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Differential evolution of lifespan and fecundity between asexual and sexual females in a benign environment

Cited by 21 publications

References 54 publications

Patterns of differentiation in the life history and demography of four recently described species of the Brachionus calyciflorus cryptic species complex

Patterns of differentiation in the life history and demography of four recently described species of the Brachionus calyciflorus cryptic species complex

Empirical evidence for fast temperature-dependent body size evolution in rotifers

Rotifers as Models in Toxicity Screening of Chemicals and Environmental Samples

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