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    Transcriptomic response of Cinachyrella cf. cavernosa spongesto spatial competition

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    Date
    2025
    Author
    Deshpande, A.
    Rivera-Vic�ns, R.E.
    Thakur, N.L.
    W�rheide, G.
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    Abstract
    Spatial competition in the intertidal zones drives the community structure in marine benthic habitats. Organisms inhabiting these areas not only need to withstand fluctuations in temperature, water level, pH, and salinity but also need to compete for the best available space. Sponges are key members of the intertidal zones, and their life history processes (e.g. growth, reproduction, and regeneration) are affected by competition. Here, we used transcriptomics to investigate the effects of interspecific competition between the tetillid sponge�Cinachyrella�cf.�cavernosa, the zoantharid�Zoanthus sansibaricus�and the macroalgae�Dictyota ciliolata�in the field. The analysis of differentially expressed genes showed that�Z.�sansibaricus�was the more stressful competitor to�C. cf.�cavernosa, which showed an upregulation of cellular respiration under stress of competition. Similarly, an upregulation of energy metabolism, lipid metabolism and the heat-shock protein (HSP) 70 was also observed along with an increase in viral load and decreased ability to synthesize protein. A downregulation of purine and pyrimidine metabolism indicated a reduction in the physiological activities of the competing sponges. Moreover, a putative case of possible kleptocnidism, not previously reported in�C. cf.�cavernosa, was also observed. This study offers a glimpse into the inner workings of marine organisms competing for spatial resources using transcriptome data.
    URI
    https://doi.org/10.1111/mec.17122
    http://drs.nio.res.in/drs/handle/2264/9527
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