Habitat Loss means a great deal to the species. It is the process by which a natural habitat is no longer able to support it's species. It is base on the destruction of an ecosystem's plant, soil, hydrologic and nutrient resources. For example Historically, Giant Pandas have been threatened by habitat loss to the point of extinction. They have become one of the biggest symbols of environmental conservation throughout the world

Overexploitation is the unsustainable use of natural resources, which occurs when harvesting exceeds reproduction. This might even drive to species to extintion. The Atlantic cod would be a good example of overfishing. In the mid-20th century atlantinc cods suffered overfishing leading population to crash and bringing them to the abrupt collape in 1992.

Climate change is a long-term change in the average weather patterns that have come to define Earth's local, regional and global climates. It is associated with rising levels of greenhouse gases in the atmosphere.

Invasive species are those species which are not native to a particular area. There are nonnative species that significantly modify or disrupt the native species. For example, the american crayfish or the florida turtle.