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No, that is NOT a MegalodonThis image has started circulating the Internet again as purported “proof” the Megalodon shark is still alive. No, that is not a shark that’s been extinct for 2.6 million years circling a helpless swimmer. It’s a basking shark, the second largest living shark behind the whale shark. Like the whale shark it’s a filter feeder and completely harmless to humans, though they can grow to gigantic sizes of up to 40 feet.
The image was taken from: https://www.flickr.com/photos/candiche/369457669/ Invasive alga protects corals from climate change but harms reef-building abilitiesSymbiodinium trenchii, a single-celled invasive species of alga that has become prevalent throughout the Caribbean, has proven to be a mixed blessing for the corals it inhabits. While S. trenchii helps these corals survive in warming waters, it also severely impacts their ability to calcify and build reefs.
Coral and algae have enjoyed a symbiotic relationship for millennia. Algae provide nutrients to the coral, and in return they are sheltered in the calcified corals’ tissues. This mutually beneficial relationship has struggled to survive in decreasing water quality, however, as warming waters, pollution, acidification, and other factors lead to coral expelling algae in a process called coral bleaching. Because coral reefs provide critical habitat to countless marine species and are therefore central to human economies and general ecosystem stability, coral bleaching is an extremely dangerous phenomenon. S. trenchii is much more likely to survive conditions that usually result in coral bleaching. A team of researchers from Penn State, the University of Delaware, and the Universidad Nacional Autonoma de Mexico found that, even in areas where low water quality had resulted in corals expelling native algae, S. trenchiiremained. The invasive alga was able to help corals survive temperatures of up to 2 degrees Celsius (3.6 degrees Fahrenheit) higher than normal. This capacity for survival, however, is not entirely good news. Researchers believe that S. trenchii is able to survive higher temperatures because it transfers fewer nutrients to its host than native species. While this leaves more nutrients for the alga itself and aids its – and its host’s – short-term survival, it also limits the host coral’s ability to calcify and grow. Some host corals, including Mountainous Star Coral, saw 50% reductions in calcifying rates. These findings show that researchers and conservationists should not be focusing solely on stress-tolerant algae species in their search for a way to help corals cope with worsening conditions in the oceans. The benefits may end up being outweighed by the costs. The findings also highlight the need for further research into invasive microbes and their impact on the ecosystems they are invading. Importance of marine lifePlanet Earth, unlike other known stars, is made up of water. Three-quarters of the Earth is water, oceans and seas form the most extensive set of water in our world. Although we are not aware of the importance of the oceans carry out a wide range of functions that allow and promote the existence of all the species that inhabit the planet.
The sea is the place in which life appeared and contains the essence of the Earth, It is source of renewable and non-renewable resources, also provides much of the food of the world. Under the sea, there is a countless fauna. All kinds of animals that still not been cataloge and that year after year they find more new species. Ocean waters contain within millions of fish, shellfish, mammals and birds that fly over the surface to forage. Marine life is a resource of extensive, providing food, medicine, and raw materials, as well as helping to support reconstruction and tourism all over the world. In addition, marine life helps determine the nature of our planet. Marine organisms produce much of the oxygen we breathe, this includes the importance of phytoplankton which is the original maintainer of the presence of the oxygen in the atmosphere. The great biodiversity of the ocean depends on microscopic organisms, the phytoplankton. Phytoplankton is found in high concentrations in the ocean and carries out photosynthesis to get their nutrients. So these organisms capture CO2, carbon dioxide, the main greenhouse gas that accelerates global warming. objetives
Identify the importance and diversity of marine life as primary source of life in our planet |
AuthorMy name is Camila, I'm a oceanography student ArchivesCategories |