Microbiome reduction and endosymbiont gain from a switch in sea urchin life-history

Tyler Carrier, Brittany Leigh, Dione Deaker, Hannah Devens, Gregory Wray, Seth Bordenstein, Maria Byrne & Adam Reitzel
Animal gastrointestinal tracts harbor a microbiome that is integral to host function, yet species from diverse phyla have evolved a reduced digestive system or lost it completely. Whether such changes are associated with alterations in the diversity and/or abundance of the microbiome remains an untested hypothesis in evolutionary symbiosis. Here, using the life-history transition from planktotrophy (feeding) to lecithotrophy (non-feeding) in the sea urchin Heliocidaris, we demonstrate that the lack of a functional gut corresponds...
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These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?