Comparison of life-history parameters and effectiveness in competition with Moina macrocopa between two Keratella tropica morphs

Ge, Ya-Li; Yu, Xiaoling; Zhan, Rong; Yu, Jin-Hang; Xi, Yi-Long; Zhang, Gen

doi:10.1016/j.limno.2020.125823

Cited by 2 publications

(1 citation statement)

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“…Ecologically, life‐history traits and their sensitivity to temperature changes played key roles in regulating the response of organisms to climate change, and organisms usually adjust their life‐history traits to adapt to environmental changes (Atkinson & Sibly, 1997 ; Stelzer, 2005 ). For example, the lifespan of short‐spined morph of Keratella tropica at 20°C was significantly higher than that at 25°C and 30°C, while the net reproductive rate was on the contrary (Ge et al., 2020 ), which were the responses of life‐history traits to the changes of temperature. And in this study, the huge magnitude of changes in the lifespan and reproduction occurred in ZJ strains, those were the number of offspring increasing and the lifespan decreasing, with the temperature increasing.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%