Major Ideas
- Earth is largely made up of rock, 71% of its surface is covered with ocean.
- Studies have shown that there is less than 10% of the ocean and no more than 1% of the deep ocean floor because of the difficulty of getting to the bottom safely.
- One and a half million of terrestrial species have been described but total estimates range from five million to more than 50 million.
- Of the organisms that live in the ocean, only 250,000 species have been identified: total estimates run closer to 400,00 to 450,00.
- Some experts posit that between 1 million and 10 million benthic species have yet to be described.
- Seawater is about 800 times as dense as air and is much more viscous. Therefore, marine organisms and particles of food can float endlessly through the water whereas no creatures drift permanently in the air.
- Density of water also buoys up organisms, obviating the need for structural supports of cellulose or bone to counteract gravity.
- Deep-sea communities must depend on the photosynthesizers that reside in the sunlight-filled surface waters.
- Temperature and depth also play an important role because these variables control the availability of oxygen.
- On land, air provides plants and animals with a fairly constant mixture of this life-giving gas: 210 milliliters per liter.
- In the sea, oxygen enters only at or near the surface because most of the water found in the deep ocean originated at the surface in the coldest parts of the world, it sank carrying large amounts of dissolved oxygen.
- Investigators learned only that the inhabitants of these realms have unusual adaptations that equip them to live in this environment.
- Reason for this, they are some of the most interesting of all oceanic residents.
Summary
Life in the ocean there are millions of sea animals or and organisms that have not yet been discovered. 10 meters of seawater adds pressure into the atmosphere, since in the environment there is less than 1% of ocean floor. Only 250,000 of those sea animals have been discovered and there is many different organisms that live in different areas of the ocean. The temperature and depth both have a part in the ocean that controls the availability of oxygen there is. Oxygen only enters the surface of the water and the uneven amount of food supplies there is is the result of pressure. Mid water and the deepest parts of the ocean. A biolumine scene could only be found 90% of mid water species of and invertebrates. The density of the water also float up organisms, obviating the need for structural supports of cellulose or bone to counteract gravity. A few hundred meters deeper there is no sunlight at all and hence no photosynthesis. The mid water and deep-sea communities must depend on the photosynthesizers that reside in the sunlight-filled surface waters. 10 meters of seawater adds roughly another atmosphere of pressure: at one-kilometer depth the pressure is 100 atmospheres; 100 times what people normally experience. Marine biologists only know little about the organisms that live down in those cold, dark regions.
Life in the ocean there are millions of sea animals or and organisms that have not yet been discovered. 10 meters of seawater adds pressure into the atmosphere, since in the environment there is less than 1% of ocean floor. Only 250,000 of those sea animals have been discovered and there is many different organisms that live in different areas of the ocean. The temperature and depth both have a part in the ocean that controls the availability of oxygen there is. Oxygen only enters the surface of the water and the uneven amount of food supplies there is is the result of pressure. Mid water and the deepest parts of the ocean. A biolumine scene could only be found 90% of mid water species of and invertebrates. The density of the water also float up organisms, obviating the need for structural supports of cellulose or bone to counteract gravity. A few hundred meters deeper there is no sunlight at all and hence no photosynthesis. The mid water and deep-sea communities must depend on the photosynthesizers that reside in the sunlight-filled surface waters. 10 meters of seawater adds roughly another atmosphere of pressure: at one-kilometer depth the pressure is 100 atmospheres; 100 times what people normally experience. Marine biologists only know little about the organisms that live down in those cold, dark regions.
Reflection
Before reading the article I already had an idea of what it was going to talk about like for example there is a lot if undiscovered/unidentified species. The thing that I didn't know was that only 10% of the ocean is discovered which is pretty surprising because the earth is covered in like 75% of water/ocean. Another thing that I didn't know was that the species in the ocean are extremely diverse that reflects the varied conditions in which they live.
Before reading the article I already had an idea of what it was going to talk about like for example there is a lot if undiscovered/unidentified species. The thing that I didn't know was that only 10% of the ocean is discovered which is pretty surprising because the earth is covered in like 75% of water/ocean. Another thing that I didn't know was that the species in the ocean are extremely diverse that reflects the varied conditions in which they live.