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  • Straight line of light against a light blue background. Caption: in the 50-to-80-micrometer range.

    Part of the "Branches on the Tree of Life" series. The term "algae" is a catchall for several evolutionary lines of photosynthetic organisms: dinoflagellates, red algae (plastids with chlorophyll A), diatoms, yellow-brown algae and brown algae (chlorophylls A and C), and green algae (chlorophylls A and B). Explores the diversity, structure, ecological roles, and modern classification of these primary producers.

    (Source: DCMP)

  • Extreme closeup of the cell structure of coral showing rectangular shape in the center of textured cell material. Labeled, (algae) ZooXanthellae. Caption: Zooxanthallae live inside some of the coral's cells.

    What are coral? They are part animal, vegetable, and mineral. These marine invertebrates typically live in compact colonies of many identical individual polyps. Corals species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. Part of the "Coral Comeback" series.

    (Source: DCMP)

  • Microscopic view of tubular structures. Caption: (Saros) They can be early indicators of environmental change.

    With support from the National Science Foundation, Lake Ecologist Jasmine Saros and her team from the University of Maine are gathering diatoms from the lake waters of southwestern Greenland. They are using the diatoms in their studies of how climate change is affecting this Arctic ecosystem. Diatoms are a type of algae that responds rapidly to environmental change. Diatom species generally associated with warmer conditions are increasing at unprecedented rates in the sediment record.

    (Source: DCMP)

  • An aerial image of a coral by the sea shore titled, Arrecife De Coral. Spanish Caption: podemos ver de que estan hechos estos arrecifes.

    This animation zooms into a coral reef to explore the tiny animals that build reefs, the photosynthetic algae inside their cells, and the damaging process of coral bleaching. Corals get much of their energy from symbiotic algae that live inside their cells. When ocean temperatures rise beyond a certain threshold, the algae’s photosynthetic machinery may be damaged and produce harmful reactive oxygen molecules. This animation shows how corals subsequently eject their algae in a process called coral bleaching, which causes the corals to turn white and often eventually die.

    (Source: DCMP)

  • Three researchers in parkas with equipment on a sheet of ice. Caption: and a team are here to study algae,

    Welcome to Barrow, Alaska, where a team of marine ecologists gears up to hit the sea ice that is actually teaming with marine life. With support from the National Science Foundation (NSF), Craig Aumack of Columbia University and a team have come here to investigate how algae in the sea ice contributes to the underlying marine ecosystems, and which marine organisms depend on the algae for nutrition. Part of the National Science Foundation Series “Science Nation.”

    (Source: DCMP)

  • A discoloured coral colony labeled, bleached coral colony. Caption: The symbiont provides 75 percent to 80 percent of the energy.

    Corals get much of their energy from symbiotic algae that live inside their cells. When ocean temperatures rise beyond a certain threshold, the algae’s photosynthetic machinery may be damaged and produce harmful reactive oxygen molecules. This animation shows how corals subsequently eject their algae in a process called coral bleaching, which causes the corals to turn white and often eventually die.

    (Source: DCMP)

  • Coral with an inset magnification showing overlapping small red dots. Caption: The color of the coral reflects millions of tiny algae

    In this episode, marine biologists take a close look at microscopic images of "super corals." The images reveal a dynamic interaction between colorful algae and the coral they inhabit. Part of the "Super Corals" series.

    (Source: DCMP)

  • Microscopic view of a transparent tube-shaped organism. Caption: an energy reserve the cell can draw on

    Part of the "Branches on the Tree of Life" series. The term "protist" covers a wide range of microscopic organisms formerly clumped into "Kingdom Protista." New molecular analyses show that the protistan lines of evolution go so far back in time they can be considered as different kingdoms of life. Through photography of living protists, amoebas, flagellates, algae, and the elegant ciliated protists are introduced in ten learning modules.

    (Source: DCMP)

  • Cross section of water with a concentration of a substance in part of it. Caption: Blooms can also deplete oxygen from the water,

    Algae play a vital role in the marine ecosystem. They provide food for all sorts of species, but in rare instances, they can also do harm. Harmful algal blooms occur when colonies of certain types of algae grow out of control and produce toxins that enter the food chain through fish and shellfish. Eventually, the toxins can kill larger marine animals like sea lions, manatees, turtles, and dolphins. It also makes shellfish unsafe for human consumption.

    (Source: DCMP)

  • Underwater rock with plants on it. Caption: To live in fast water requires special structures

    Part of the "Life in Aquatic Environments" series. Places many of the organisms into an ecological perspective of hydras, planarians, annelids, aquatic insects, rotifers, protists, and all other organisms that provide food for fish and other vertebrates. Observes adaptations for planktonic life in daphnia and other cladocerans, copepods, rotifers, and planktonic algae. Explores bacterial decomposition, recycling of materials, adaptations for bottom life, and ecological relationships in the bottom community. Takes an underwater look at the highly specialized organisms that live in rapids, under rock communities, and in slower waters. Investigates adaptations for life in temporary wetland environments.

    (Source: DCMP)

  • Photosynthesis, it's a crazy, complicated process.

    Trees, plants, algae, and phytoplankton all do it. Learn about photosynthesis, the process that powers the world, in this animated video.

    (Source: DCMP)

  • Hands adjusting a microscope. Spanish captions.

    This video explores the fascinating world of microscopic life. It begins by discussing viruses and explaining how they cause disease. Students also learn the importance of bacterial cells and explore the life of protists. Additional concepts and terminology include microscope, vaccine, moneran, decomposition, amoeba, phytoplankton, yeast, algae, paramecium, and protozoa.

    (Source: DCMP)

  • A photo depicts a shallow coastal region teaming with colonies of corals

    The Great Barrier Reef is the largest reef on the planet and exists in nutrient poor waters. How does the reef support all the diverse organisms that live on the reef? This episode discusses the relationship between coral and algae, which is the key to the survival of the entire ecosystem. Part of the "Nature's Microworlds" series.

    (Source: DCMP)

  • Coral reef with fish swimming in the vivid blue water above and two snorkelers at the water's surface. Caption: it has a lot of fish, it has less algae,

    Ana Luz Porzecanski is a conservation biologist at the American Museum of Natural History. In this episode, she answers students' questions about the diversity of animal and plant life in Cuba. Part of the "Ask a Scientist About" series.

    (Source: DCMP)

  • Hydra

    • Video
    Close up view of a microscopic creature. A light green cell wall with a lighter beige internal structure is visible. Caption: are exactly what the algae cells need

    Part of the "The Biology Classics" series. Hydra is a genus of simple fresh-water animals possessing radial symmetry. Observes feeding behavior of hydra, shows detailed microscopy of stinging cells used in capturing prey, and reviews two digestive processes: cellular and extracellular. Also covers locomotion, reproduction by budding, the development of sex organs, and symbiotic guests, both external and internal.

    (Source: DCMP)

  • Closeup of terraced moss on a hillside with water dripping from it. Caption: early land plants most likely lived in moist environments.

    The conquest of land by plants and their proliferation is an biologic story. This video highlights the evolution of plants, while also describing the major groupings of modern-day plants. Concepts and terminology include: chloroplasts, photosynthetic pigments, cell wall, green algae, nonvascular plants, vascular plants, gymnosperm, angiosperm, alteration of generations, Bryophyta, Hepaticophyta, Anthocerotophyta, Pteridophyta, Lycophyta, Sphenophyta, Psilotophyta, Coniferophyta, Cycadophyta, Gnetophyta, Ginkgophyta, and Anthophyta.

    (Source: DCMP)

  • Gloved hands working with petri dishes covered in a variety of materials. Caption: (narrator) We always look for better ways to get energy we need.

    Researchers explore how different types of biomass can be used to produce fuel. One researcher is building reactors to grow algae used to create biofuel. A different study examines how leafcutter ants break down biomass in order to convert cellulose in plants to a fermentable sugar used to make ethanol. Finally, an engineer uses chemistry and heat to turn sawmill waste into bio-oil and gasoline.

    (Source: DCMP)

  • Beach with algae and other objects on it. Caption: Converting bacteria and organic material into protein,

    Part of the "Branches on the Tree of Life" series. Worms with segmented bodies make up the phylum Annelida. Explores the three classes of annelids: Class Polychaeta (feeding, locomotion, and larval stages), Class Oligochaeta (lifestyles, feeding adaptations, and anatomy of freshwater oligochaetes and earthworms), and Class Hirudinea (leeches, crayfish, and worms show adaptations for commensal, parasitic, and scavenger lifestyles). DNA evidence places annelids close to the molluscs on the tree of life.

    (Source: DCMP)

  • A crowded street covered in fog. Caption: Sometimes it seems so dark on the streets at midday.

    Pollution is waste material produced from human activities. It impacts the environment in a negative way. Explores how pollution can affect the air, water, and land in the form of gases, liquids, and solids. Substances that constitute pollution in the environment include: greenhouse gases (CO2, smog, and industrial emissions), oil, blue/green algae, plastic, litter, dog poop, and fertilizer. Also explores how a sustainable future depends upon individuals and society minimizing pollution by making informed and responsible decisions when choosing consumer items.

    (Source: DCMP)

  • Microscopic view of spherical green objects. Caption: we call the process photosynthesis.

    Climb aboard the Cyclops, a microscopic research vessel, and investigate an amazing hidden world on which all living things depend. The Cyclops houses a team of scientists known as the Micronauts and guides them through their discoveries of biological classification, diversity, and ecology. In this clip, the Micronauts explore the process of photosynthesis. They conduct experiments using paramecium by observing the green algae cells within its body. Through their experiments, they realize the in the presence of light, the green cells generate oxygen and food molecules. Part 2 of the Microscopic Monsters Series.

    (Source: DCMP)