For example, if there was suddenly snowstorm in the middle of summer, the bees would be caught off guard and would die in the cold.Previous studies showed that the Shenandoah salamander, Plethodon shenandoah, is confined to several dry talus slopes in the Blue Ridge Mountains of Virginia it is competitively excluded by P. If the weather does not stick to this pattern, many bees will die. Regardless of the current size of their population, bees need the temperature and weather to stay within certain ranges. Density independent factors for honeybees include things like weather and temperature. Instead of looking at density independent factors in general, letвЂ™s turn our view to a population of honeybees and the factors that likely affect the size of their population. Even the human population sees drastic health effects from pollution, from lead poisoning do to drinking water to increased lung diseases. Density independent factors like these often cause a slow and steady drag on populations over time. Therefore, whether you are the last pair of endangered clownfish in the ocean or have a huge population like sparrows, your birthrate is still negatively impacted. Even organisms in the oceans are affected, as pollutants dissolve from the atmosphere into various water sources. From here, they are carried globally and affect all organisms. While humans are concentrated in cities around the globe, the emissions and chemicals we create are dispersed into the atmosphere. Like other density independent factors, pollution is a good example of a density independence. Yet, the hurricane affects all species and individuals within its path, regardless of how many there were. While this is often a nuisance for humans, it increases the food source of birds and bats, possibly increasing their birthrates as well. The standing water left from the hurricane provides many insects, such as mosquitos, ample breeding sites. Fungi and insects living on dead plant matter will be able to feast and reproduce on the dead wood. New, smaller plants will be given an opportunity to grow where they were previously restricted by the shade cast by the large tree. Consider the area unearthed by the tree in the above image. They could have been the last of their species, or one in a billion.

These animals and plants die, regardless of how dense their population was. Many news images show pictures of fish washed up into roadways. Many animals, such as fish and amphibians, succumb to rapidly rising and falling tides. For many species, a hurricane drastically increases the death rate, as the trees simply cannot withstand the wind and waves.

Trees like the one in the image above would survive any regular storm. The fact is, hurricanes increase the death rate for many species, while some species see a highly increased birthrate after the destruction.Дuring a hurricane, winds increase to dangerous speeds, tearing large trees out of the ground. While we often see the devastation of these storms on the news, we rarely consider the impacts of such a storm on wildlife and vegetation in the area. Consider a hurricane, slamming into the coastline. Natural disaster is a perfect example of a density independent factor. Examples of Density Independent Factors Natural Disaster Below are several examples of common density independent factors and how they affect various species.

This would make oxygen a density dependent factor for these particular bacteria.ДЄnalyzing each population specifically allows scientists to identify their unique density independent factors. If these bacteria where to grow thick, oxygen would not affect each bacteria, and the effect on the death rate would be lessened. As they grow in density, the bacteria furthest from the nearest source of oxygen is protected. Image an obligate anaerobe bacteria, for instance. While oxygen is a density independent factor for most oxygen breathing organisms, it may be a density dependent factor for some. First, density independent factors for one population of organisms is not the same for every organism on the planet. However, density independent factors are often confused density dependent factors for a number of reasons. These factors apply to all individuals in a population, regardless of the density. There are many common density independent factors, such as temperature, natural disasters, and the level of oxygen in the atmosphere. Density independent factors vary depending on the population, but always affect the population the same regardless of its size. Density independent factors are typically a physical factor of the environment, unrelated to the size of the population in question. Density independent factors, in ecology, refer to any influences on a populationвЂ™s birth or death rates, regardless of the population density.