Abstract
How do conservation biologists know which places are important to protect? How do nature guides know which animals can be found in which places? In this experiment you can discover how maps can be used to show how different animals are distributed in a local environment.Objective
In this science fair project, you will make and use maps to investigate the distribution of different kinds of animals in your local environment.
Introduction
![]() Click here to watch a video of this investigation, produced by DragonflyTV and presented by pbskidsgo.org |
Biogeography is a branch of science that studies changes in the distribution of life forms on the planet over time. A distribution is the area where you can find a plant or animal, and can be shown on maps by marking a geographical range where the organism is found. Different organisms have different distributions, some are very rare while others are nearly everywhere. Cosmopolitan species, like the common housefly, have a very broad distribution and can be found almost world-wide. Other species are endemic, like the Giant Panda, and are very rare because they are only found in a small geographical region. Often times, a rare endemic species may be at risk for extinction, and in need of protection.
Changes in the distribution of a species can be natural or due to human impact on the environment. Human activity and movement across the globe have allowed some species to move into new environments, and so are called exotic species. Sometimes, an exotic species can become an invasive species, which means it spreads rapidly in new environments and competes with native species for resources. Often, a cosmopolitan species is also an invasive species.
It can be very difficult to remove an invasive species, because usually they have no natural predators in their new environment. Sometimes an invasive species can put a native species at risk, which can be a problem for sensitive species that are already endangered. For example, the melaleucas tree is an invasive species in the Florida Everglades. Originally from Australia, the melaleucas tree spreads so rapidly that it doesn’t give the native plants a chance to grow. Without the native plants, the entire ecosystem of the Everglades is changing, which puts endangered species, like the Florida panther, at even greater risk. To try to stop the growth of the melaleucas tree and rescue the native species, wildlife officials have imported an Australian bug, called a weevil, which eats the melaleucas tree. But Elissa and Julia from DragonflyTV wanted to know if the weevil is actually able to slow the growth of the melaleucas trees. To find the answer, they created a species map comparing the number of weevils and melaleucas trees in several locations throughout the Everglades. Watch their Everglade explorations in this video from DragonflyTV to find out if the weevil, a tiny bug, is really helping to rescue native species like the Florida panthers!
You don’t need to travel all the way to the Everglades to make species maps though! In this science fair project, you will do some field work to make a map to describe the distribution of species in your neighborhood. How much biodiversity exists in your local environment? Are there areas with cosmopolitan or endemic species? Are there areas with invasive or native species? Can the maps you make help you identify places around your home that can be restored to provide more native habitat?
Terms, Concepts and Questions to Start Background Research
To do this type of experiment you should know what the following terms mean. Have an adult help you search the internet, or take you to your local library to find out more!
Bibliography
Materials and Equipment
Experimental Procedure
Variations
Credits
Sara Agee, Ph.D., Science Buddies
Last edit date: 2008-12-16 12:49:41
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