30 Jan '14, 3pm

A Dark Bloom in the South Atlantic.

A Dark Bloom in the South Atlantic.

On January 19, 2014, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image of a bloom of microscopic organisms off the southeastern coast of Brazil. Note how the waters of the South Atlantic are darkened in patches stretching as much as 800 kilometers (500 miles) from south to northeast across the continental shelf. In the image, the puffy strands of white over the sea and inland are clouds. Biologists working in the area have identified the bloom as Myrionecta rubra (previously known as Mesodinium rubrum ), a fast-swimming ciliate protist. Though it is not a true phytoplankter, it is an autotroph; that is, it makes its own food. Myrionecta fuels itself by photosynthesis, but it does so by ingesting chloroplasts (chlorophyll-bearing plastids) from other algae. Aside from threatening the microscopic algae it consumes, Myrione...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=82968&=...

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