Temporal patterns and processes of genetic differentiation of the Brachionus calyciflorus (Rotifera) complex in a subtropical shallow lake

Zhang, Ye; Zhou, Ao; Xi, Yi-Long; Sun, Qiang; Ning, Le-Feng; Xie, Ping; Wen, Xin-Li; Xiang, Xian-Ling

doi:10.1007/s10750-017-3407-9

Cited by 29 publications

(69 citation statements)

References 70 publications

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“…This finding was further corroborated by the detailed study of Zhang et al. () who performed a full‐year monitoring of the zooplankton community in subtropical Lake Tingtang. During summer, B. dorcas (“BcII‐S” in Zhang et al., ) and B. calyciflorus (“Bc‐SW”) were found to coexist until July.…”

Section: Discussionsupporting

confidence: 67%

“…Zhang et al. () is the only study that delimited species based on a phylogenetic analysis of ITS1 sequences, thus allowing species identification according to Michaloudi et al. ().…”

Section: Resultsmentioning

confidence: 99%

“…() who performed a full‐year monitoring of the zooplankton community in subtropical Lake Tingtang. During summer, B. dorcas (“BcII‐S” in Zhang et al., ) and B. calyciflorus (“Bc‐SW”) were found to coexist until July. After a 3‐month disappearance (August–October) these species were found to be entirely replaced by B. fernandoi (“BcI‐W”) throughout the subsequent winter and spring.…”

Section: Discussionmentioning

confidence: 99%

“…After a 3‐month disappearance (August–October) these species were found to be entirely replaced by B. fernandoi (“BcI‐W”) throughout the subsequent winter and spring. Additional life history experiments suggested temperature as an important seasonal clue to these phenological differences by showing higher induction of mixis in B. fernandoi than in the other species at summer temperatures and the opposite pattern at autumn temperatures (Zhang et al., ). These results align well with the recent findings of Paraskevopoulou, Tiedemann, and Weithoff () who demonstrated a consistently higher tolerance to heat stress in B. calyciflorus than in B. fernandoi .…”

Section: Discussionmentioning

confidence: 99%

“…This work formed the basis for the recent (re‐)description of four species, B. calyciflorus , Brachionus dorcas , Brachionus elevatus , and Brachionus fernandoi (Michaloudi et al., ). Several of these cryptic species have been found to coexist (Xiang et al., 2011b; Zhang et al., ). There is hardly any information available about how they differ ecologically.…”

Section: Introductionmentioning

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: Discussionsupporting

confidence: 67%

“…Zhang et al. () is the only study that delimited species based on a phylogenetic analysis of ITS1 sequences, thus allowing species identification according to Michaloudi et al. ().…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

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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Geographic origin shapes the adaptive divergences of Rotaria rotatoria (Rotifera, Bdelloidea) to thermal stress: Insights from ecology and transcriptomics

Li,

Gao,

Zhu

et al. 2024

Ecology and Evolution

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Global warming has raised concerns regarding the potential impact on aquatic biosafety and health. To illuminate the adaptive mechanisms of bdelloid rotifers in response to global warming, the ecological and transcriptomic characteristics of two strains (HX and ZJ) of Rotaria rotatoria were investigated at 25°C and 35°C. Our results showed an obvious genetic divergence between the two geographic populations. Thermal stress significantly reduced the average lifespan of R. rotatoria in both strains, but increased the offspring production in the ZJ strain. Furthermore, the expression levels of genes Hsp70 were significantly upregulated in the HX strain, while GSTo1 and Cu/Zn‐SOD were on the contrary. In the ZJ strain, the expression levels of genes Hsp70, CAT2, and GSTo1 were upregulated under thermal stress. Conversely, a significant decrease in the expression level of the Mn‐SOD gene was observed in the ZJ strain under thermal stress. Transcriptomic profiling analysis revealed a total of 105 and 5288 differentially expressed genes (DEGs) in the HX and ZJ strains under thermal stress, respectively. The PCA results showed clear differences in gene expression pattern between HX and ZJ strains under thermal stress. Interestingly, compared to the HX strain, numerous downregulated DEGs in the ZJ strain were enriched into pathways related to metabolism under thermal stress, suggesting that rotifers from the ZJ strain prioritize resource allocation to reproduction by suppressing costly metabolic processes. This finding is consistent with the life table results. This study provides new insights into the adaptive evolution of aquatic animals in the context of global climate change.

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Genetic differentiation and phylogeography of rotifer Polyarthra dolichoptera and P. vulgaris populations between Southeastern China and eastern North America: High intercontinental differences

Liang

McManus

Wang

et al. 2022

Ecology and Evolution

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Genetic differentiations and phylogeographical patterns of small organisms may be shaped by spatial isolation, environmental gradients, and gene flow. However, knowledge about genetic differentiation of rotifers at the intercontinental scale is still limited. Polyarthra dolichoptera and P . vulgaris are cosmopolitan rotifers that are tolerant to environmental changes, offering an excellent model to address the research gap. Here, we investigated the populations in Southeastern China and eastern North America and evaluated the phylogeographical patterns from their geographical range sizes, geographic–genetic distance relationships and their responses to spatial‐environmental factors. Using the mitochondrial cytochrome c oxidase subunit I gene as the DNA marker, we analyzed a total of 170 individuals. Our results showed that some putative cryptic species, also known as entities were widely distributed, but most of them were limited to single areas. The divergence of P . dolichoptera and P . vulgaris indicated that gene flow between continents was limited while that within each continent was stronger. Oceanographic barriers do affect the phylogeographic pattern of rotifers in continental waters and serve to maintain genetic diversity in nature. The genetic distance of P . dolichoptera and P . vulgaris populations showed significant positive correlation with geographic distance. This might be due to the combined effects of habitat heterogeneity, long‐distance colonization, and oceanographic barriers. Furthermore, at the intercontinental scale, spatial distance had a stronger influence than environmental variables on the genetic differentiations of both populations. Wind‐ and animal‐mediated transport and even historical events of continental plate tectonics are potential factors for phylogeography of cosmopolitan rotifers.

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Temporal patterns and processes of genetic differentiation of the Brachionus calyciflorus (Rotifera) complex in a subtropical shallow lake

Cited by 29 publications

References 70 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

Geographic origin shapes the adaptive divergences of Rotaria rotatoria (Rotifera, Bdelloidea) to thermal stress: Insights from ecology and transcriptomics

Genetic differentiation and phylogeography of rotifer Polyarthra dolichoptera and P. vulgaris populations between Southeastern China and eastern North America: High intercontinental differences

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