Thursday, November 19, 2009

3 factors that lower biotic potential



The three factors are carrying capacity, density dependent factors, and density independent factors. The carrying capacity does not allow the population growth to exceed a certain amount. The density dependent factors like the pathogen would balance out the birth rate with the death rate. Density independent factors such as the hurricane and temperature would cause people to die and decrease the birth rate.

What is the biggest impact humans have had on the planet?


Humans take care of their houses, streets, and buildings. If humans vanish, then trees and plants would take over and cover the Earth, causing animals to roam. All the things humans have done on Earth would be destroyed.

How individual characteristics influence population sizes


The environment, resources, and birth rate have an influence on the population size. The way the species live in their natural habitat can affect the population. The population size would increase if the species are not threatened by other animals. If they live in a safe and comfortable environment, they would survive longer. The population size is dependent on the resources because if the resources are available when needed, then there is enough for the population. If there are less resources, it won't support the population. The birth rate also contributes to the size of the population. If there are too many babies, there wouldn't be that much resources to feed the whole population.

Thursday, October 29, 2009

The four types of competition


The four types of competition are intraspecific and interspecific competition, competitive exclusion, and resource petitioning. Intraspecific competition is competition between two of the same species. An example would be two girls fighting over one guy. Interspecific competition is referred to as the competition between two different species. For example, a cat and a dog are fighting over one food bowl. In competitive exclusion, one species is out-competing another. For example, native plants excluded the non-native plants out of its habitat. Resource petitioning is a species changing over time to reduce competition. An example would be birds, primates, and bats eating a wide variety of fruits instead of just the ones they usually consume.

The importance of eating lower on the food chain.


Eating lower on the food chain would sustain the balance of the flow. Because the animals at the bottom of the food chain is being consumed, the animals would reproduce more and more. This creates more food for the secondary and tertiary consumers. However, if the top of the food chain is being consumed, there would be a dramatic increase of the producers and primary consumers. This would cause the food chain to be unbalanced.

Thursday, October 22, 2009

Why is it weaker animals and plants thrive?


Dinosaurs are already strong and other animals do not threaten them as much. However, weaker animals and plants keep changing over time. As these changes occur, they adapt more to their environment, but they will never become as strong as the dinosaur. Because the secondary and tertiary consumers eat the smaller animals and plants, the smaller animals would have to reproduce more to continue their species and to meet the demand. Therefore, weaker animals and plants tend to thrive.

Saturday, October 10, 2009

The most important person in history of environmental science


I think that John James Audobon is the most important. He painted lifelike portraits of birds and other animals in their natural habitats. He demonstrated the beauty of how the animals looked back in the late 17th century. This influenced public interest in preserving the beauty of wildlife.

Endangered species we should save


Tigers are at risk of becoming extinct or threatened. Saving the tiger means saving the entire forest kingdom with all the other animals in it. There is more research to be done on tigers. Did they evolve from cats or did cats evolve from tigers?

http://www.bigcatrescue.org/index.htm

Sunday, September 27, 2009

The differences between chaotic, orderly and complex.


Something that is chaotic is not organized and it does not have order. For example, paper that is scattered all over a desk is considered chaotic because it is unorganized and random. The alphabet can be orderly system because it is always used in that order. A fractal is complex and it repeats in a pattern that is complicated.

Thursday, September 17, 2009

How is environmental science different from other science like biology and chemistry ?

Environmental science is different from other fields of science because it involves the way the environment affects humans and other organisms. Biology only covers the study of life and chemistry is based on the chemicals and their reactions with other substances. Environmental science also involves the idea of chaos, order, and complexity. A series of random events can produce complex, orderly systems. For example, a checkerboard is a highly orderly "system."