Phytoplankton; small cells that use photosynthesis to turn sunlight into food that live near the surface of the ocean. ... scientists can learn more about how these plants may be contributing to and affected by, climate and environmental change. “Because with climate change you have less mixing of the water column, we thought that the phytoplankton would have more access to light and they would simply expand, but instead we saw these bands of high and low abundance,” Cabré says. As diverse as these effects can be, changes to phytoplankton communities will occur as well. Phytoplankton are very sensitive to mineral availability, including nitrate and iron, and also to light. Seasonal phytoplankton variability in the southern Patagonian shelf was assessed. Because phytoplankton migration would cause marine life to move with it (or die, should organisms fail to adapt quickly enough to the change in their environment), that has the potential to affect fisheries and other economies in the coastal areas. For example, oysters utilize phytoplankton as a food source. Here we report on their temporal and spatial variabilities in open waters between 2003 and 2013 using satellite ocean color data. Some of these effects are global, some remain regional. However, the impact of changes in the dynamics of sea ice specifically on phytoplankton spring blooms, a major contributor of the annual primary production in the Arctic Ocean, remains poorly known. This pair of images shows changes in sea surface temperature (top) and phytoplankton productivity (bottom) between 2000 and 2004, after the last strong El Niño event, which occurred between 1997-1998. Productivity of phytoplankton depends on a number of environmental factors many of which are altering with climate change. Phytoplankton produce about 50% of the global biomass and take up an equal amount of CO2 from the atmosphere as all terrestrial ecosystems taken together. That includes humans. Shellfish are also in danger from the effects of ocean acidification. • Spring diatoms were replaced by haptophytes and dinoflagellates in summer. Moreover, the dominant species of phytoplankton may also change between different seasons within a year . Biodiversity of the ocean will change as the health of phytoplankton change (Rogelj, et al. Phytoplankton are microscopic plants that live in the ocean. These changes in phytoplankton affect the zooplankton composition promoting shifts . • Higher phytoplankton biomass was observed during spring. Phytoplankton are highly dependent on a diversity of nutrients and influenced by physical and chemical properties in the ocean. Ecology of Shellfish. 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