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Changing Seas

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.

Changing Seas  
  • The Fate of Carbon
    Thursday, May 9
    5:30 am on UEN-TV 9.1
    For millennia, the exchange of CO2 between the oceans and atmosphere has been in balance. Now, with more anthropogenic carbon-dioxide in the atmosphere, the oceans are taking up more CO2 as well. This additional CO2 is negatively impacting sensitive ecosystems through a process called ocean acidification, and scientists worry how changes to the ocean environment will affect the way carbon is cycled through the seas.
  • Majestic Mantas
    Saturday, May 11
    3:30 pm on UEN-TV 9.1
    The remote Revillagegdo Archipelago off Mexico's Pacific coast is a hotspot for giant mantas that interact with awe-struck scuba divers. Scientists are studying the local population using photo ID techniques and acoustic tags which track the movements of these mysterious fish. They are also conducting experiments to see if the filter-feeding rays are impacted negatively by microplastics, tiny pieces of toxic trash that float in the ocean.
  • Majestic Mantas
    Thursday, May 16
    5:30 am on UEN-TV 9.1
    The remote Revillagegdo Archipelago off Mexico's Pacific coast is a hotspot for giant mantas that interact with awe-struck scuba divers. Scientists are studying the local population using photo ID techniques and acoustic tags which track the movements of these mysterious fish. They are also conducting experiments to see if the filter-feeding rays are impacted negatively by microplastics, tiny pieces of toxic trash that float in the ocean.
  • Dolphins: Breaking The Code
    Saturday, May 18
    3:30 pm on UEN-TV 9.1
    Dr. Denise L. Herzing has dedicated her career to studying a community of free-ranging Atlantic spotted dolphins that live in the shallow, crystal clear waters of the Bahamas Through non-invasive, in-water observation; she researches the animals' social structure, behaviors and communication. Now modern technology is making it possible to correlate the dolphins' sounds and behavior, bringing Herzing and her collaborators closer to decoding dolphin communication.
  • Dolphins: Breaking The Code
    Thursday, May 23
    5:30 am on UEN-TV 9.1
    Dr. Denise L. Herzing has dedicated her career to studying a community of free-ranging Atlantic spotted dolphins that live in the shallow, crystal clear waters of the Bahamas Through non-invasive, in-water observation; she researches the animals' social structure, behaviors and communication. Now modern technology is making it possible to correlate the dolphins' sounds and behavior, bringing Herzing and her collaborators closer to decoding dolphin communication.
  • Cryptic Critters
    Saturday, May 25
    3:30 pm on UEN-TV 9.1
    Deep underwater, on a shipwreck near Key West, lives a tiny potential new threat. Being in the right place at the right time, one expert spotted it and immediately knew that it didn't belong. Researchers want to know where this new species came from, and whether its sudden appearance spells disaster for the delicate coral reef ecosystem in the Florida Keys.
  • Cryptic Critters
    Thursday, May 30
    5:30 am on UEN-TV 9.1
    Deep underwater, on a shipwreck near Key West, lives a tiny potential new threat. Being in the right place at the right time, one expert spotted it and immediately knew that it didn't belong. Researchers want to know where this new species came from, and whether its sudden appearance spells disaster for the delicate coral reef ecosystem in the Florida Keys.
  • Lords of the Wetlands
    Saturday, June 1
    3:30 pm on UEN-TV 9.1
    While American crocodiles are recovering in parts of their range, their future looks bleak in Jamaica. Habitat loss and poaching for meat have led to a drastic decline in the population. Dedicated scientists and conservationists are working to save the species through research, education, and conservation initiatives.
  • Lords of the Wetlands
    Thursday, June 6
    5:30 am on UEN-TV 9.1
    While American crocodiles are recovering in parts of their range, their future looks bleak in Jamaica. Habitat loss and poaching for meat have led to a drastic decline in the population. Dedicated scientists and conservationists are working to save the species through research, education, and conservation initiatives.
  • Fishing The Flats for Science
    Saturday, June 8
    3:30 pm on UEN-TV 9.1
    Flats fishing is popular with recreational anglers in the Caribbean and the Florida Keys. But until recently, little was known about tarpon, bonefish and permit - the species most coveted by sports fishermen. Now scientists are studying the fish to better understand their movements, habitat, and spawning behaviors.
  • Fishing The Flats for Science
    Thursday, June 13
    5:30 am on UEN-TV 9.1
    Flats fishing is popular with recreational anglers in the Caribbean and the Florida Keys. But until recently, little was known about tarpon, bonefish and permit - the species most coveted by sports fishermen. Now scientists are studying the fish to better understand their movements, habitat, and spawning behaviors.
  • The Cordell Bank: A National Treasure
    Saturday, June 15
    3:30 pm on UEN-TV 9.1
    California's north-central coast is famous for its natural splendor. Only fifty miles northwest of San Francisco's Golden Gate Bridge lies the Cordell Bank, a magical underwater island few people have ever heard of. Protected inside a National Marine Sanctuary, this oasis is an ecological hot spot for marine life - attracting birds, sea turtles and marine mammals from thousands of miles away.
  • The Cordell Bank: A National Treasure
    Thursday, June 20
    5:30 am on UEN-TV 9.1
    California's north-central coast is famous for its natural splendor. Only fifty miles northwest of San Francisco's Golden Gate Bridge lies the Cordell Bank, a magical underwater island few people have ever heard of. Protected inside a National Marine Sanctuary, this oasis is an ecological hot spot for marine life - attracting birds, sea turtles and marine mammals from thousands of miles away.
  • Toxic Waters
    Saturday, June 22
    3:30 pm on UEN-TV 9.1
    Harmful algal blooms come in many forms, from toxic outbreaks impacting the health of animals and humans, to non-toxic but expansive sargassum mats devastating local economies and tourism. Scientists are working to understand what causes these blooms, how they impact us, and how we can stop them.
  • Toxic Waters
    Thursday, June 27
    5:30 am on UEN-TV 9.1
    Harmful algal blooms come in many forms, from toxic outbreaks impacting the health of animals and humans, to non-toxic but expansive sargassum mats devastating local economies and tourism. Scientists are working to understand what causes these blooms, how they impact us, and how we can stop them.
  • Corals In Crisis
    Saturday, June 29
    3:30 pm on UEN-TV 9.1
    Stony Coral Tissue Loss Disease is devastating Florida's fragile coral reef ecosystem. But all hope is not lost. Dedicated scientists are working hard to find the cause of the disease, treat the ill and restore these cities of the sea to their former glory.
  • Corals In Crisis
    Thursday, July 4
    5:30 am on UEN-TV 9.1
    Stony Coral Tissue Loss Disease is devastating Florida's fragile coral reef ecosystem. But all hope is not lost. Dedicated scientists are working hard to find the cause of the disease, treat the ill and restore these cities of the sea to their former glory.
  • Mystery of the Humpback Whale Song
    Saturday, July 6
    3:30 pm on UEN-TV 9.1
    Each winter, a population of humpback whales migrates to its breeding grounds in the Hawaiian Islands. It is here that male humpbacks perform their elaborate and haunting song. Experts are studying the purpose of this song and what it might tell them about the animals' overall fitness.
  • Mystery of the Humpback Whale Song
    Thursday, July 11
    5:30 am on UEN-TV 9.1
    Each winter, a population of humpback whales migrates to its breeding grounds in the Hawaiian Islands. It is here that male humpbacks perform their elaborate and haunting song. Experts are studying the purpose of this song and what it might tell them about the animals' overall fitness.

 

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  • The Fate of Carbon
    Saturday, May 4
    3:31 pm on UEN-TV 9.1
    For millennia, the exchange of CO2 between the oceans and atmosphere has been in balance. Now, with more anthropogenic carbon-dioxide in the atmosphere, the oceans are taking up more CO2 as well. This additional CO2 is negatively impacting sensitive ecosystems through a process called ocean acidification, and scientists worry how changes to the ocean environment will affect the way carbon is cycled through the seas.
  • Toxic Algae: Complex Sources and Solutions
    Thursday, May 2
    5:30 am on UEN-TV 9.1
    Lake Okeechobee was once the blue heart of Florida, pumping fresh water down to the Everglades and beyond. But now that a dike and canal system control its flow, water releases from the lake periodically create putrid mats of blue green algae. Scientists think water pollution is to blame, and if something isn't done about it there could be irreparable damage to the environment, the local economy and people's health.
  • Toxic Algae: Complex Sources and Solutions
    Saturday, April 27
    3:31 pm on UEN-TV 9.1
    Lake Okeechobee was once the blue heart of Florida, pumping fresh water down to the Everglades and beyond. But now that a dike and canal system control its flow, water releases from the lake periodically create putrid mats of blue green algae. Scientists think water pollution is to blame, and if something isn't done about it there could be irreparable damage to the environment, the local economy and people's health.
  • The Future of Seafood
    Thursday, April 25
    5:30 am on UEN-TV 9.1
    It is estimated there will be two billion more people on the planet by mid-century. To feed this booming world population, more fish will need to be farmed than ever before. One way to increase fish production in a sustainable way is to move aquaculture operations offshore - where there is plenty of available space and strong currents flush out the pens to avoid polluting sensitive ecosystems.
  • The Future of Seafood
    Saturday, April 20
    3:30 pm on UEN-TV 9.1
    It is estimated there will be two billion more people on the planet by mid-century. To feed this booming world population, more fish will need to be farmed than ever before. One way to increase fish production in a sustainable way is to move aquaculture operations offshore - where there is plenty of available space and strong currents flush out the pens to avoid polluting sensitive ecosystems.
  • Beneath The Bridge
    Thursday, April 18
    5:30 am on UEN-TV 9.1
    The Blue Heron Bridge in Riviera Beach, Florida is known as one of the best shore dives in the United States. Even though at first it appears as an unlikely dive site, it is home to a rich variety of marine life, ranging from tiny nudibranchs to manta rays. Underwater photographers are documenting what lives beneath the bridge, and a scientist is studying how two species of octopus co-exist there.
  • Beneath The Bridge
    Saturday, April 13
    3:30 pm on UEN-TV 9.1
    The Blue Heron Bridge in Riviera Beach, Florida is known as one of the best shore dives in the United States. Even though at first it appears as an unlikely dive site, it is home to a rich variety of marine life, ranging from tiny nudibranchs to manta rays. Underwater photographers are documenting what lives beneath the bridge, and a scientist is studying how two species of octopus co-exist there.
  • Maug's Caldera: A Natural Laboratory A Co-Production with Open Boat Films
    Thursday, April 11
    5:30 am on UEN-TV 9.1
    This episode takes viewers into an area of the remote Pacific, the islands of Maug. Formed by an ancient volcano, shallow hydrothermal vents are found close to coral reefs inside the submerged caldera. These vents emit levels of CO2 that can be expected in the world's oceans by the end of the century, making these waters a natural laboratory for scientists studying the impacts of ocean acidification on coral reefs.
  • Maug's Caldera: A Natural Laboratory A Co-Production with Open Boat Films
    Saturday, April 6
    3:30 pm on UEN-TV 9.1
    This episode takes viewers into an area of the remote Pacific, the islands of Maug. Formed by an ancient volcano, shallow hydrothermal vents are found close to coral reefs inside the submerged caldera. These vents emit levels of CO2 that can be expected in the world's oceans by the end of the century, making these waters a natural laboratory for scientists studying the impacts of ocean acidification on coral reefs.
  • Manatees: Conserving A Marine Mammal
    Thursday, April 4
    5:30 am on UEN-TV 9.1
    Every winter, hundreds of manatees aggregate at Crystal River, Florida. This sanctuary is also a treasure for scientists, who take advantage of these manatee gatherings to study them. From decades of visual ID studies to the most cutting-edge DNA research, experts hope that science will help conserve this beloved marine mammal.