Human Effects on Oceans Positive and Negative https://www.youtube.com/watch?v=ngrZ7r0XA7M&t=3s Ways Humans Depend on the Ocean 1. Oxygen- phytoplankton contribute 70-80% of the oxygen into the world's atmosphere. 2. Weather- The ocean absorbs energy from the Sun. 3. Food- Seafood provides much of the world's protein. 4. Transportation- Most of the world's goods are transported by boats. 5. Recreation- Many countries main source of income is from ocean tourism. Ocean barge carrying supplies to a port. Negative Impact from Humans on the Ocean 1. Chemical Runoff creates Algal Blooms. 2. Overfishing 3. Coral Bleaching 4. Ocean Pollution from microplastics and oil spills CHEMICAL RUNOFF Human activity such as runoff pollution can originate from small or large sources on land and water, including motorized vehicles, oil spills, agricultural chemicals, and recreation. Runoff pollution negatively affects beaches and ocean habitats. Runoff is caused by …... https://www.youtube.com/watch?v=LQOTCCTtGcY&t=3s How are algal blooms harmful: • Some can produce toxins that are harmful to various marine species and humans (illness/death) • Blocks sunlight from other aquatic plants • Uses up oxygen when the algae dies & decays • Clogs the gills of fish • Gives off awful smell & discolors the water LINK Overfishing food from the ocean creates an imbalance in existing ocean food webs. Destroyed coral reefs:LINK Excess sediment (dirt, rock, debris) from the land washes into the oceans, smothering coral reefs, and blocking essential sunlight. As the coral reefs die, they release algae from their tissue and begin a process known as “coral bleaching.” The affects of destroyed coral reefs extends to many organisms that depend on the reefs for food, oxygen, shelter, and to hide from predators or prey. Notice there is no life among the bleached coral ☹ ☹ ☹ Oceans are full of trash. The trash is broken down into smaller pieces and they are eaten by other organisms. These plastics and chemicals end up in our food supply. Micro-plastic in the ocean Plastic is the most abundant type of solid waste in our oceans ☹ LINK Watch the Great Pacific Garbage Patch Video DIRECTIONS: Read the article An Ocean of Plastic. You can click on text-to speech to have it read to you. Any hope for our oceans? One solution in the works was created by a 19 year old Watch the 2 minute video to learn more about his insightful solution to cleaning our oceans in only 5-10 years! https://www.youtube.com/watch?v=Do4vUUklh98&sns=em Human Created Artificial Reefs Reefs have been created off the coasts to help repair the damage done by humans. Off the coast of South Padre, on the bottom of the Gulf of Mexico, lies a ship on its side: The Texas Clipper. Artificial reefs provide hard surfaces for reef fish species, enhancing overfished populations like snapper and grouper. You will create a 1 slide poster. Choose one problem in the ocean and persuade others to change their behavior. You need facts, images and ways to change.