GENETIC DIVERSITY IN PHYTOPLANKTON. “Comparisons across strains demonstrate that E. huxleyi, which has long been considered a single species, harbours extensive genome variability reflected in different metabolic repertoires. Genome variability within this species complex seems to underpin its capacity both to thrive in habitats ranging from the equator to the subarctic and to form large-scale episodic blooms under a wide variety of environmental conditions.””
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http://www.ncbi.nlm.nih.gov/m/pubmed/23760476/