Light[ edit ] Natural light does not penetrate the deep ocean, with the exception of the upper parts of the mesopelagic. Since photosynthesis is not possible, plants cannot live in this zone. Since plants are the primary producers of almost all of earth's ecosystems, life in this area of the ocean must depend on energy sources from elsewhere. Except for the areas close to the hydrothermal vents, this energy comes from organic material drifting down from the photic zone.
This discovery provides further evidence for hydrothermal activity illustrated here and heightens the possibility that the ocean of Enceladus could have conditions suitable for microbial life.
Analysis of data from NASA's Cassini spacecraft indicates that the hydrogen is best explained by chemical reactions between the moon's rocky core and warm water from its subsurface ocean. The SwRI-led team's discovery Chemosynthesis video that Enceladus' ocean floor could include features analogous to hydrothermal vents on Earth, which are known to support life on the seafloor.
We have not found evidence of the presence of microbial life in the ocean of Enceladus, but the discovery of hydrogen gas and the evidence for ongoing hydrothermal activity offer a tantalizing suggestion that habitable conditions could exist beneath the moon's icy crust.
Evidence for Hydrothermal Processes," published in the April 14,issue of the journal Science. NASA missions provide new insights into 'ocean worlds' in our solar system On the Earth's ocean floorhydrothermal vents emit hot, mineral-laden fluid, allowing unique ecosystems teeming with unusual creatures to thrive.
Microbes that convert mineral-laden fluid into metabolic energy make these ecosystems possible. Christopher Glein, a co-author on the paper and a pioneer of extraterrestrial chemical oceanography. Previous flybys provided evidence for a global subsurface ocean residing above a rocky core.
Molecular hydrogen in the plumes could serve as a marker for hydrothermal processes, which could provide the chemical energy necessary to support life. To search for hydrogen specifically native to Enceladus, the spacecraft flew particularly close to the surface and operated INMS in a specific mode to minimize and quantify any spurious sources.
This graphic illustrates how Cassini scientists think water interacts with rock at the bottom of the ocean of Saturn's icy moon Enceladus, producing hydrogen gas.
Analysis determined that it was unlikely that the observed hydrogen was acquired during the formation of Enceladus or from other processes on the moon's surface or in the interior.Chemosynthesis and photosynthesis are processes by which organisms use an energy source to create food.
These processes have similarities and differences, but they are both vital to our ecosystem, producing the food that is used to fuel life on Earth.
Chemosynthesis Vs. Photosynthesis (Image: Santosh Telkhede/iStock/Getty Images) Video of. Note for people who want to use my code with WP-Syntax; you need to follow these steps 1. Install WP-Syntax (obviously your WordPress blog is already up and running), and enable this plugin.
Show the video clip Biosphere to introduce your ecology unit. The clip shows how things are recycled on Earth.
Download Media Player here. View predator prey relationships from National Geographic’s, "Leopards versus Hyenas and Lions". Chemosynthesis is the use of energy released by inorganic chemical reactions to produce food.
Chemosynthesis is at the heart of deep-sea communities, sustaining life in absolute darkness, where sunlight does not penetrate. Watch video · One of the strangest ecosystems on Earth lies deep under the ocean. Video: Differences Between Chemosynthesis & Photosynthesis.
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