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Changing Seas

Seagrasses and Mangroves (#203)

They are an ancient species of flowering plants that grow submerged in all of the world's oceans. Seagrasses link offshore coral reefs with coastal mangrove forests. Today, these "prairies of the sea," along with mangroves, are on the decline globally. Scientists fear the diminishing vegetation could result in an ecosystem collapse from the bottom of the food chain all the way to the top. Changing Seas joins experts in the field as they work to restore Florida's important mangroves and seagrasses. [26 minutes] Closed Captioning

This episode has not aired in the past few months on Iowa Public Television.

PBS Video

Series Description: CHANGING SEAS takes viewers on an exciting adventure to the heart of our liquid planet. The documentary series offers an unprecedented look at how oceanographers and experts study earth's vast underwater wilderness, while shedding light on how over-fishing, global climate change and pollution threaten ocean resources.

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  • Super Grouper (#101)

    Scientists in the field share the life history of an awe-inspiring fish, the Goliath Grouper. [26 minutes]

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  • Mission to Inner Space (#102)

    Scientists live and work on the seafloor in an undersea research station, NOAA's Aquarius Reef Base. [26 minutes]

  • Corals of the Deep (#103)

    Off Florida's Atlantic coast grow the porcelain-white and centuries old corals of the deep sea. [26 minutes]

  • Farming The Sea (#104)

    Focuses on experts who produce fish for food production and to replenish depleted wild populations. [26 minutes]

  • No Fish Left Uncounted (#201)

    How do you count two fish, three fish or even a school of fish? In Dry Tortugas National Park, located 70 miles from Key West, Florida, a group of scientists have joined forces to conduct a massive fish census. In this unprecedented collaboration, experts from four different agencies unite to count and analyze fish data from select sites. Changing Seas follows highly-skilled science divers as they determine the size of fish populations in hopes of better understanding how fishing pressures and environmental changes affect populations of marine resources within the park. [26 minutes]

  • Sentinels of the Seas (#202)

    Bottlenose dolphins are a beloved Florida icon. But, recent studies show disturbing signs of immune system dysfunction and disease plaguing this charismatic mammal. These problems might be linked to legacy contaminants and other pollutants which bio-accumulate up the ocean food chain. Changing Seas meets with experts for an in-depth look at the health status of Florida's wild bottlenose dolphins. [26 minutes]

  • Sinking the Vandenberg (#204)

    In the turquoise blue waters of the Florida Keys, a new attraction is drawing scuba divers from around the world: The USNS General Hoyt S. Vandenberg. Laid to rest in the Florida Keys National Marine Sanctuary, the Vandenberg is the world's second largest intentionally sunk shipwreck. In her last mission as an artificial reef, this massive ship is already attracting a variety of fish and other marine life. Now, natural resources managers are trying to determine what impact this artificial reef has on fish populations and the health of the surrounding natural reefs. [26 minutes]

  • Alien Invaders (#301)

    In the waters of the western Atlantic and Caribbean, a voracious alien predator has taken hold. Native to the Indo-Pacific, the invasive lionfish is a major threat to biodiversity and the health of already stressed coral reef ecosystems. [26 minutes]

  • Reef Revival (#302)

    In the emerging science of coral reef restoration, marine biologists and resource managers are discovering naturally occurring mechanisms that promote coral growth and restore ecological balance in these gardens of the sea. [26 minutes]

  • Prescription: Oceans (#303)

    The oceans are part of America's newest medical frontier. In Florida, a group of scientists are testing sea sponges for their potential anti-cancer properties. These and other marine invertebrates may hold the key to unlocking the secrets of our own biology. [26 minutes]

  • After the Spill (#304)

    Last year's catastrophic oil spill in the Gulf of Mexico may no longer make headline news, but the story is far from over. Oceanographers continue to study the long term effects this disaster might have on marine ecosystems. [26 minutes]

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