A recent study compared Foraminiferan species diversity in deep sea environments (>1500m) around the world and found that species numbers, composition and genetic makeup was far more consistent among deep sea sampling locations than numbers and composition of foram species in different shallow habitats (<200 m), revealing greater stasis of species over space and time at depth. Along with observations that deep sea species have a longer duration in the fossil record than do shallow species, they propose that a model where new species evolve in shallower areas and then migrating to deeper seas where their evolutionary rate slows seems to be consistent with marine foram samplings (Buzas et al. 2013).
- Buzas, M.A., L.C. Hayek, S.J. Culver, B.W. Hayward, and L.E. Osterman, 2013. Ecological and evolutionary consequences of benthic community stasis in the very deep sea (>1500 m). Paleobiology : 102-12. http://dx.doi.org/10.1666/13010
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