CONTRAST IN OCEAN COLOR AND PRODUCTIVITY
FIGURE 14.27 The chlorophyll of abundant phytoplankton is reflected in the greenish cast of this highly productive area of temperate ocean. Meanwhile, the crystalline blue of these tropical waters signals the low biomass of phytoplankton and low primary production. The ocean’s least productive waters, such as this example, are increasing in extent, while the area of the more productive waters declines.
(Peter Kunasz/Shutterstock); (Tororo Reaction/Shutterstock)