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Why don't fish freeze in lakes during winter?
because the ice on top of the water has little atoms stick to each other and sir gets grapes in side between the atoms which makes ice flot on top of the water and that preven…ts the water from freezing and also the water below is moving in rivers and oceans
White-tailed deer adjust their metabolic rate, home range, and food supply in the winter. During the longer summer days, deer have a higher metabolic rate to take advan…tage of higher quality and more abundant food supplies. During the shorter days of winter, they lower their metabolic rate and reduce their body temperature. They survive on lower quality food such as white cedar and mountain maple twigs. They need to eat 6-8 pounds of this reduced nutrition food. Deer also reduce their home range in winter. They often stay in the shelter of a conifer grove, especially at night. Studies have shown that night temperatures in these groves are up to 60 degrees warmer than out in the open. A deer's heavier winter coat, with its hollow hairs, also provides needed insulation against the cold. Deer also match their reproductive cycle to the change in the seasons. They mate in fall. During the early part of their pregnancy, which occurs during the worst of the winter, the fetus develops very slowly and requires very little from the female. During the last trimester, the spring thaw provides more and higher quality browse for the mother such as aspen, willow, and birch. The fetus then grows rapidly and is born after the snow melts.
Each winter ice covers a lake During this time fish in the lake have a smaller food supply What kind of disturbance is this?
Birds actually use several tricks to keep their legs from freezing. First they can stand on one leg and pull the other up under their feathers when one leg starts getting too …cold. And if it gets really cold, they can squat to cover both legs with breast feathers. If you see a bird doing this, they may be getting uncomfortably cold legs.Also birds’ feet are mostly bone and tendons, so unlike mammals, they have a limited supply of nerves, blood vessels or muscles to freeze. Their feet are also covered with scales which isn’t a living tissue and less susceptible to freezing.Finally, birds don’t have sweat glands in their skin to produce any moisture to freeze. Heat and moisture are accumulated in sacs, transferred to the lungs and eliminated through the mouth. No moisture escaping through their feet is also the reason they don’t stick to metal perches in the winter.
How does the floating ice keep fish and other animals from getting crushed to death in winter by freezing lakes and ponds?
The icy waters of the Arctic and Antarctic Oceans support a great amount of marine life. For millions of years life has remained unchanged, making it possible for these animal…s to adapt themselves to these particular patterns of existence. But they do get some help from nature. All liquids have a boiling point and a freezing point. When water boils at a certain temperature it turns into steam. When it is cooled toa certain temperature it freezes and becomes ice. Water boils at 100 degree Celsius (100 °C) and freezes at 0 °C. When the outside temperature falls below the freezing point of water, lakes and rivers get frozen. However, only the top layer of the lake or river freezes. Underneath the frozen upper layer, the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds. But why doesn't the entire body of water freeze, like a giant, lake-sized ice-cube? Generally, all liquids expand on heating, but water is an exception to this rule. If water is heated, its volume gradually decreases. (This decrease in volume continues till the temperature rises to 4 °C.) At temperatures over 4 °C water starts expanding. It then keeps expanding with the further rise in temperature, till finally at 100 °C it turns into steam. In other words, at 4 °C, water has the least volume (occupies the least amount of space) and maximum density (is at its heaviest). This irregular expansion of water is called anomalous expansion. This anomalous expansion plays an important role by only freezing the upper layer in lakes and rivers. During winter months in colder countries the outside or atmospheric temperature is very low - it drops to below freezing - and the upper layers of water in the lakes and ponds start cooling. When the temperature of the surface layers falls to 4 °C, the water body acquires maximum density and sinks down. The water that sinks down displaces water below, and the lower layers of water simultaneously rise up. This also gets cooled to 4 °C and again sinks down. When the temperature of the water body finally goes below 4 °C, the density or heaviness of water decreases and as a result water does not sink down. The surface water finally freezes at 0 °C while the lower part still remains at 4 °C. The light frozen layer of ice floats on top. Ice does not allow heat to pass through it easily, so the freezing of the waters below is a very slow process. At depths below 30 metres, temperatures are cold and stable, but food is scarce. As a result animals have adapted to this situation by growing more slowly. There are other dangers that fish face in freezing waters - like death. The body fluid of an ordinary fish can solidify if the temperature of the surrounding water drops below -5 °C. So Arctic and Antarctic fish have adjusted to their surroundings in an interesting manner. Certain species of cod, flatfish and polar fish have a reduced metabolic rate and produce antifreeze molecules called glycoprotein to reduce the freezing point of their body fluids. One could look at it as the fishy version of bears hibernating, a survival tactic that has seen these finned friends outlive many other creatures on Earth.
The oceans are saline or salt water. This affects the temperature at which they freeze. Plain water freezes at about 0°C at sea level, but saline, at the concentrations norma…lly found in the ocean, freezes at close to -2°C. Pressure also affect freezing temperature. The deep ocean is at great pressure, so even though it can be at temperatures of -3°C it does not freeze. The temperature of the surface of the ocean varies from about -2°C to about 34°C depending on currents and latitude. Much of the surface of the Arctic ocean is frozen all year round, but the extent varies during summer and winter. An area of the sea around Antarctica also forms sea ice in winter each year, but much less area is permanently frozen than in the Arctic.
Why doesn't water in lakes and ponds of temperate climates freeze solid during the winter and kill nearly all the living things it contains?
Water stores what is called latent heat. This is basicially the energy required to convert water through its stages. The lack thereof of this energy is the change from liquid …to solid. The smaller and more shallow lakes possess less liquid water and, thus less latent energy. As a consequence they lose energy and freeze more quickly when the surrounding atmospheric and soil temperatures are below the freezing point.
Lake Pend Oreille will freeze along the shallow shores in winter. However, the lakes depth and size prevent the surface from freezing over completely.
To answer this question, you have to account for many variables. Excluding morphology of the lake and generalizing behavior (as well as species of fish) it is possible for fis…h to die during a freeze. Still, there are many mechanisms that allow for fish to survive these common events. Most fish adjust behaviors, by vertically migrating to allow for the change in temperature or they may migrate from the lake. Other species produce anti-freeze proteins which alter the physiology of the fish. If you need a more in-depth answer, just message me.
What are the special properties of water that enables fish to survive in lakes that freeze in the winter?
A2. The whole of the lake volume does not freeze in winter. Due to the fact that ice expands when it freezes, and consequently floats. My old science teacher pointed out that …this is a GOOD THING, so the fish don't get stuck! A1. Fish benefit from many properties of water; just to name a few, water's capability as an oxygen carrier enables the proper functioning of fish's respiratory and metabolic processes, and its properties as a solvent allows the precise concoction of solutes and molecules that dictates the balance of the entire ecosystem. The unique property of water that specifically enables aquatic life forms to survive drastic temperature changes, however, however, is the same property that is largely responsible for providing the suitable conditions allowing the formation of life on Earth: The high specific heat capacity of water. Specific heat capacity is a measurable physical quantity that represents the amount of heat per unit mass required to change the temperature of a substance by a degree. Therefore, the high specific heat capacity of water sets forth a large thermal energy requirement for each degree of change in temperature. Consequently, a large shift in above-surface temperature (e.g., 30 degrees Celsius) translates to a much smaller shift in the water temperature (e.g., 10 degrees Celsius). In other words, a large body of water can be thought of as a thermally stable system resistant to temperature shifts. This very special property of water is a result of the extensive hydrogen bonding between the individual water molecules. This network of intermolecular interactions that enables water to absorb a large amount of energy before undergoing change is also responsible for other unique thermodynamic properties of water such as its high boiling point.
The entire surface of a lake may certainly become frozen during the wintertime in some areas, but unless the lake in question is fairly small, it is unlikely for a lake to fre…eze completely beneath the surface. The sheer volume of water in a larger, deeper lake would make it very difficult, if not impossible.
I think you are probably talking about the fact that frozen water (ice) is less dense than liquid water, so freezing temperatures will enable the ice to form on top of the wat…erbody, but still allowing liquid water underneath so fish can survive. Also, ice is usually translucent, so it can still penetrate the ice, allowing algae to continue to photosynthesize, providing oxygen for the fish below.
In Dog Health
A dogs nose does not freeze in the winter because it contains a blood flow. It may not also freeze because there is warm air that goes in and out of it at all times.
Every habitat has a carrying capacity for a given organism based on available space and resources such as food. This goes for fish in a lake. If the population of fish exc…eeds the carrying capacity, some of the fish will die off and reduce the population. Depending on the environment and the species, disease and predators also help keep populations under control.