Cock
Bottom waters of a pond refer to the water located at the lowest level of the pond, closer to the sediment or substrate. This water tends to be cooler, denser, and may have lower oxygen levels compared to the surface waters. Organisms that live in or interact with the bottom waters are adapted to these specific conditions.
usually warm and shallow waters such as the ones that great white sharks live in. that's why you would much more likely see a dolphin or whale on a beach in the Mediterranean than somewhere on the Antarctic.
== == "Turning Over" refers to the phenomena when the warm surface water (which is Oxygen Poor) is driven downward (usually by a cold hard rain after a long drought) and the colder oxygen rich waters are forced closer to the surface. Fish instinctually move to lower water depths to find more oxygen, and when the water has turned over, they find oxygen poor waters and can die of asphyxiation. Turnover does in fact refer to a mixing of warm surface waters and cold bottom waters, but actually, it is the surface waters that are oxygen rich, and bottom waters which are oxygen poor. In a lake, for example over the course of a long summer, sunlight will penetrate the surface waters, resulting in natural production of algae (phytoplankton). The phytoplankton are responsible for most of the oxygen in a lake. But as the algae becomes more productive, it shades out the lake, preventing sunlight from penetrating deeply. From the surface of the water down to the point where only the tiniest bit of light remains is called the photic zone. It is ONLY in this zone that photosynthesis can occur, and therefore oxygen production. In the bottom waters, where there is no sunlight, there is no photosynthesis and therefore no oxygen production. Furthermore, the sunlight is the only natural source of heat. So the photic zone becomes warmer as the summer goes on, while the bottom waters, which are not sunlit, stay cool. Warmer water is less dense than cold water and so the warm water floats on top of the cold water. This is called thermal stratification. So when there is a cold hard rain at the end of a long summer, the cold rain falls into the surface waters, cooling it down. When surface waters get close enough to the temperature of bottom waters, the water column will become mixed, resulting in turnover. So the short answer to your question is, turnover is NOT related to fishing. LOL.
The mediterranean
All seas and oceans have salted waters.
they come from the colder waters on the bottom of the oceans
The Suez canal is a man made waterway that connects the Red Sea to the Mediterranean Sea. So the waters from the Mediterranean Sea flows thru the Suez canal to the Red Sea, and also the waters from the Red Sea flows thru the Suez canal to the Mediterranean Sea.
Rome and Carthage fought each other in the Mediterranean for commercial control of the sea-lanes .
It is Italy.
It is Italy.
No, there would likely be fewer organisms at the bottom of a deep lake compared to the surface or shallower areas. This is because light levels decrease, oxygen levels may be lower, and food availability may be limited in deeper waters.
Still water, with no eddies or currents. Turbulent water will mix oxygen and thermal levels. Still water will develop gradients. In still water, above 0°C the surface will be warmest and contain the most oxygen, the bottom will be coldest and contain the least oxygen. In water with atmosheric temperatures below 0°C, the surface will be coldest, being frozen, and temperature either increasing on the way down, or increasing towards the middle, then cooling again, depending on depth. Oxygen levels are generally consistant throughout in bodies of water with a frozen surface.