You've probably heard that ocean acidification is predicted to cause problems for calcifying sea critters, like certain plankton, which are anticipated to have trouble building their calcium carbonate skeletons in lower pH seas.
Research published today in Current Biology uncovers another possible problem with a more acidic future ocean: sperm-meets-egg may not work as well. At pH levels predicted for the end of this century, Jon Havenhand of Sweden's University of Gothenburg and colleagues found sea urchin sperm swam more sluggishly (that is, both speed and motility were significantly reduced.) They also found a 26 percent reduction in the number of eggs that developed into swimming larvae under such conditions.
Havanhand expects his results will apply to fertilization in other ocean species. "Of course, this is a fairly sweeping extrapolation, and many more data are required before we can say anything definitive on the topic," Havenhand told Discovery News. "However as a first look at the effects of acidification on fertilization in marine invertebrates, this doesn't paint an encouraging picture!"
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