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  1. What are plankton? - NOAA's National Ocean Service

    The word “plankton” comes from the Greek for “drifter” or “wanderer.” An organism is considered plankton if it is carried by tides and currents, and cannot swim well enough to move against …

  2. What are phytoplankton? - NOAA's National Ocean Service

    Jun 16, 2024 · Most phytoplankton are buoyant and float in the upper part of the ocean, where sunlight penetrates the water. Phytoplankton also require inorganic nutrients such as nitrates, …

  3. How much oxygen comes from the ocean?

    The surface layer of the ocean is teeming with photosynthetic plankton. Though they're invisible to the naked eye, they produce more oxygen than the largest redwoods. Scientists estimate that …

  4. What is Ocean Acidification?

    Jun 16, 2024 · Decreases in carbonate ions can make building and maintaining shells and other calcium carbonate structures difficult for calcifying organisms such as oysters, clams, sea …

  5. Harmful Algal Blooms (Red Tide) - NOAA's National Ocean Service

    Harmful algal blooms (HABs) can occur in fresh, marine (salt), and brackish (a mixture of fresh and salt) water bodies around the world. They are caused by diverse organisms, including …

  6. Ocean Facts - NOAA's National Ocean Service: Newsroom

    The National Ocean Service (NOS) translates science, tools, and services into action, to address threats to coastal areas such as climate change, population growth, port congestion, and …

  7. Are all algal blooms harmful? - NOAA's National Ocean Service

    Jun 16, 2024 · Not all algal blooms are harmful, some can actually be beneficial. Phytoplankton are found at the base of the marine food chain therefore all other life in the ocean relies on …

  8. What is eutrophication? - NOAA's National Ocean Service

    It’s a problem that should matter to you, whether you live near the ocean or not. That’s because it begins wherever people live and ends with damage to resources we all use and enjoy.It all …

  9. How do coral reefs benefit the economy? - NOAA's National …

    Healthy Corals are the foundation of our ocean’s food chain, from tiny plankton to the largest animals in the sea. And coral reefs are important to our economy, too.

  10. What is marine snow? - NOAA's National Ocean Service

    Nov 5, 2020 · The decaying material is referred to as “marine snow” because it looks a little bit like white fluffy bits. The “snowflakes” grow as they fall, some reaching several centimeters in …