Because salt water has higher density
There is no set amount of light or of oxygen in fresh water.
No, running water typically has more oxygen than standing freshwater. This is because running water constantly churns and aerates, allowing for better oxygen exchange with the atmosphere. Standing freshwater can become stagnant and depleted of oxygen, especially in warm conditions or with high levels of organic matter present.
Freshwater typically has a greater concentration of dissolved oxygen compared to saltwater because oxygen dissolves more easily in freshwater due to its lower salinity. Ocean water is less oxygenated because it has a higher concentration of salts, which can make it more challenging for oxygen to dissolve.
Takes large amounts of oxygen from water....sometimes killing what ever is living in the water.
Freshwater marine organisms obtain oxygen through diffusion across their body surface or through specialized respiratory structures like gills. They extract dissolved oxygen from the water around them to support their metabolic processes. Some organisms, like fish, have a more efficient respiratory system to extract oxygen from water.
when brackish water(seawater mixed with freshwater) comes into contact with soil.
Freshwater has more oxygen than salt water but oxygen is more solublein fresh water.
Running water typically has more oxygen than standing water because the movement of the water helps to aerate and oxygenate the water. Freshwater usually contains more oxygen than saltwater due to differences in solubility and temperature affecting oxygen levels.
Some examples of freshwater plants include water lilies, hornworts, water hyacinths, and duckweed. These plants play important roles in freshwater ecosystems by providing oxygen, habitat, and food for various aquatic organisms.
They learn to hold their breath under water.
Dissolved oxygen levels are lower in saltwater due to the higher salinity, which decreases the solubility of oxygen. Additionally, the solubility of gases decreases as water temperature increases, which can further reduce dissolved oxygen levels in saltwater compared to freshwater.
The presence of water algae in a freshwater lake can impact the ecosystem by causing algal blooms, which can lead to decreased oxygen levels in the water, harm aquatic plants and animals, and disrupt the balance of the ecosystem.