Do anaerobic environments still exist on Earth today?

Question

Astronomy

Answer 1

No oxygen, no problem (examples of anaerobic organisms..
Over the past few years, for example, we have sampled and analyzed sediments in the Guaymas Basin in the Gulf of California, where hundreds of meters of sediments have piled on top of hydrothermal vents. We had expected to find the molecular signs of archaea adapted to high heat (hyperthermophiles), which are well known at hydrothermal vents.

But instead we found something completely different—a major new type of archaea, related to known methane-producing archaea, or methanogens. We believe that the high geothermal heat emanating from the hydrothermal vent site is breaking down organic matter in the sediments into short-chain fatty acids, ammonia, and more methane.

Some of these compounds percolate upward and are released from the sediments into the ocean—but not all of them. In the sediments we also found isotopic and gene sequence signatures that reveal archaeal populations that use methane to grow in oxygen-free environments, such as those beneath the Guaymas sediments.

The discovery of these anaerobic methanotrophs fills a large gap in our knowledge of Earth’s microbial and geochemical cycles. Microbes that generate methane, and others that consume it, play crucial roles in minimizing how much methane—a greenhouse gas more potent than carbon dioxide—is released from the ocean to the atmosphere.

These microorganisms complete a subsurface methane cycle that allows life to flourish at the seafloor, not only in the microbial oases of hydrothermal vent sites, but also in deep marine sediments and the subsurface biosphere. We are now exploring deep marine sediments in the Pacific to investigate whether this phenomenon is global.

Though the pace of microbial discoveries has increased, history warns us that we haven’t seen everything yet. The book on microbial life, on Earth and elsewhere in the universe, is far from written.

Answer 2

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RE:
Do anaerobic environments still exist on Earth today?
Astronomy

Answer 3

Yes, both benthal near volcanic vents sub-sea as well as other areas. Many species of bacteria are anaerobic and create the own environment...such as puncture wounds. Anaerobic does not imply vacuums but only the lack of a sustainable level of oxygen for life. If life is discovered on other planets, it is likely it will be anaerobic. In a manner of thinking, plants are anaerobic in that given sunlight and carbon dioxide, they flourish without requiring oxygen molecules.

Answer 4

yes... and it cause hypoxia environtment..
Natural occurrences of hypoxia (where no oxygen found - anaerobic environment) have been observed. Water flowing from a river into the sea is less dense than salt water. When this water does not mix with the underlying saline water, the oxygen concentration in the bottom layer may become low enough for hypoxia to occur. Hypoxia is particularly problematic in shallow waters of semi-enclosed bodies of water like the Waddenzee or the Gulf of Mexico where land runoff is substantial. In these areas, a so-called "dead zone" can be created.. satisfy??

Answer 5

It's stil la bit of a grey area, when a group of single celled organisms cease to be a community of life and become a single organism, most likely once amoeba and orgnaisms started to multiply and create specific trait cells they were on a role. Insects and molluscs are some of the most simple organisms that develop advanced orgnaism traits such as cells with different tasks, foreign organisms living in them as well as DNA. From there is the big leap to invertebrates which first occured via fish.

Answer 6

As a kid who hated to brush his teeth I remeber my Dentist showing me a slide of the stuff he scraped off and told me. These are anarobic bacteria. All you have to do is brush your teeth to kill them.

Answer 7

yes it does

Answer 8

Yes, there is no air under water :-)