Evidence supporting cryptic species within two sessile microinvertebrates, Limnias melicerta and L. ceratophylli (Rotifera, Gnesiotrocha)

Kordbacheh, Azar; Wallace, Robert L.; Walsh, Elizabeth J.

doi:10.1371/journal.pone.0205203

Cited by 17 publications

(14 citation statements)

References 121 publications

(119 reference statements)

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“…Edmondson (1940) Nandini et al, 2017). The application of molecular tools for systematics of sessile rotifers, including Limnias, has been gaining momentum (Kordbacheh et al, 2018). Despite this, the systematics of this and other genera of sessile rotifers is still uncertain, which could underestimate a great diversity of Gnesiotrocha (Wallace et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Temperature-dependent demographic differences in sessile rotifers of the genus Limnias (Rotifera: Gnesiotrocha)

Jiménez‐Santos¹,

Sarma²,

Nandini³

2019

JEB

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Rotifer research on sessile taxa has received less attention because they are not easy to identify in fixed samples. In the Lake Xochimilco, a Ramsar site in Mexico City, three morphotypes of L. ceratophylli and a single morphotype of L. cf. melicerta occur in different densities. The aim of this study was to test if temperature was responsible for the differences in the population densities of these morphotypes. The present study was carried out using population growth method consisting of 4 treatments (3 morphotypes of L. ceratophylli and one of L. cf. melicerta) at 20 and 25°C. Experiments were carried out in 50 ml glass jars containing 25 ml synthetic medium with Chlorella vulgaris as food. The population growth rates (r) were derived. Analysis of variance (ANOVA) and posthoc tests were used to quantify the intra-and interspecific differences in the population growth rates. The temperature levels for optimal population growth rates differed among the morphotypes of same species. At 20°C, the morphotype 1 had the highest r-1 (0.23 d) similar to that of L. cf. melicerta, while-1 morphotype 3 had the lowest (0.15 d). For L. cf. melicerta, the r was higher at 25°C than at 20°C. Of three morphotypes of L. ceratophylli, morphotype 3 had the highest r at 25°C similar to that of L. cf. melicerta at same temperature. There were significant differences among growth patterns within the morphotypes of L. ceratophylli, depending on culture temperature. These trends highlight the relative importance of environmental variables in differentiating morphotypes of a sessile species complex which could explain their possible seasonal changes in the natural waterbodies.

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Section: Resultsmentioning

confidence: 99%

Temperature-dependent demographic differences in sessile rotifers of the genus Limnias (Rotifera: Gnesiotrocha)

Jiménez‐Santos¹,

Sarma²,

Nandini³

2019

JEB

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“…Fourth, cryptic species have different life histories which cannot be identified from fixed samples [53]. Finally, for certain analysis of taxonomic characters such as measurements of trophi on SEM, culturing is needed to obtain sufficient quantity for the description of size range [54].…”

Section: Discussionmentioning

confidence: 99%

Rotifer Species Diversity in Mexico: An Updated Checklist

2021

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A review of the Mexican rotifer species diversity is presented here. To date, 402 species of rotifers have been recorded from Mexico, besides a few infraspecific taxa such as subspecies and varieties. The rotifers from Mexico represent 27 families and 75 genera. Molecular analysis showed about 20 cryptic taxa from species complexes. The genera Lecane, Trichocerca, Brachionus, Lepadella, Cephalodella, Keratella, Ptygura, and Notommata accounted for more than 50% of all species recorded from the Mexican territory. The diversity of rotifers from the different states of Mexico was highly heterogeneous. Only five federal entities (the State of Mexico, Michoacán, Veracruz, Mexico City, Aguascalientes, and Quintana Roo) had more than 100 species. Extrapolation of rotifer species recorded from Mexico indicated the possible occurrence of more than 600 species in Mexican water bodies, hence more sampling effort is needed. In the current review, we also comment on the importance of seasonal sampling in enhancing the species richness and detecting exotic rotifer taxa in Mexico.

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“…Given this wide biogeographic range with concomitant diversity of potential substrata, we suggest that additional studies be initiated that examine the fitness of Cupelopagis on an array of substrata. It seems likely that cryptic speciation is dominant across the Rotifera (Kordbacheh et al, 2018; Michaloudi et al, 2018; Mills et al, 2017). That fact coupled with its ease of culture makes this species a good candidate to investigate potential links between cryptic speciation and settlement behaviour.…”

Section: Discussionmentioning

confidence: 99%

Substratum selection and feeding responses influence the demography of the sessile rotifer Cupelopagis vorax (Collothecacea: Atrochidae)

Espinosa‐Rodríguez

Sarma

Wallace

2020

Internat Rev Hydrobiol

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Larvae of the sessile rotifer Cupelopagis vorax swim using their ciliated corona, but do not feed. Once they attach to a substratum and metamorphose into adults, they are predatory on protozoans and micrometazoans. Here we present information on ingestion time, feeding behaviour and food preference of C. vorax using protozoans and non‐sessile rotifers as prey. We also tested effects of physical, chemical and biological stimuli on settlement of C. vorax larvae and, using life table experiments, determined their survivorship and fecundity on three, free‐floating macrophytes. Ingestion time was shortest on prey species smaller than 100 µm. Capture/attack ratio was low for Brachionus calyciflorus, but high for Lecane inermis and Peranema sp. The ingestion/capture ratio was lowest for Oxytricha sp. and highest for Euchlanis lyra and Squatinella lamellaris. Species that swim slowly and close to the surface of hydrophytes (E. lyra, Lepadella patella, L. inermis, Peranema sp., Philodina sp. and S. lamellaris) had lower ingestion time, higher encounter/attack ratio, and were the preferred prey in selectivity experiments. Larval settlement was higher on macrophyte leaves of Ceratophyllum demersum, Lemna valdiviana and Wolffiella sp., but lower on Azolla filiculoides and Wolffia columbiana. Coverslips coated with dried extracts of macrophytes showed lower rates of larval settlement compared to live macrophytes, as well as coverslips that had been allowed to develop natural biofilms or were physically roughened. Contrary to what might be expected from the settling tests, life‐table experiments showed that W. columbiana enhanced survivorship (mean lifespan and life expectancy) and rate of population increase, while animals attached to Wolffiella sp. had lower values for life history characteristics. This study adds to our understanding of the impact of Cupelopagis predation on protozoans and rotifers and the importance of substratum selection on larval settlement, adult survival, and reproductive potential after larval settlement.

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Evidence supporting cryptic species within two sessile microinvertebrates, Limnias melicerta and L. ceratophylli (Rotifera, Gnesiotrocha)

Cited by 17 publications

References 121 publications

Temperature-dependent demographic differences in sessile rotifers of the genus Limnias (Rotifera: Gnesiotrocha)

Temperature-dependent demographic differences in sessile rotifers of the genus Limnias (Rotifera: Gnesiotrocha)

Rotifer Species Diversity in Mexico: An Updated Checklist

Substratum selection and feeding responses influence the demography of the sessile rotifer Cupelopagis vorax (Collothecacea: Atrochidae)

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