Biological Systems Homework 6

Part One: IDENTIFICATIONS (IDs). Use the book to help you identify the following. Be as specific as possible, and include names, dates, and relevant facts as appropriate. Be sure to explain the significance of the term.There should be a minimum of three (3) sentences for each ID. Use of the internet is okay if you are stuck, as long as you do not plagiarize.

Chapter 50: Intro to Ecology and the Biosphere, Page 1080, 7th edition

A) Rachel Carson

B) Distribution

c) Dispersal

D) Wetland

E) Summarize 4 terrestrial biomes on pg 1100-1102

Part Two: Kudzu

Kudzu is an exotic species that can be found in the Southern United States. This exotic species was introduced into the area by humans. Species-specific introductions by humans can have a detrimental impact on native species distribution and abundance. Watch the Youtube video clip on Kudzu and answer the questions below using complete sentences.

Kudzu

1) Why does Kudzu flourish in the Southern United States?

2) Why was kudzu used in the south?

3) How can people contain kudzu?

4) What types of environmental conditions assist in kudzu spreading?

5) How is kudzu influencing species distribution and species abundance in the south (you may have to think about this one)?

Part Three: Dutch Elm Disease

Dutch elm disease (DED) is one of the most destructive shade tree diseases in North America. The disease affects American elms, killing individual branches and eventually the entire tree within one to several years. Since its introduction, DED has swept through urban areas, causing tremendous losses of high value American elm street trees. It has also greatly altered the role of elm in ecosystems. Despite DED, elm remains as a component of natural stands. Trees often survive to seed producing age, but later succumb to the disease. Waves of disease incidence may be related to population fluctuations of the beetles that vector the disease. This disease is another example of how human activities can influence species abundance and distribution. Watch the Youtube video clip on Dutch Elm Disease and answer the questions below using complete sentences.

1) What is Dutch Elm Disease? What does it do to the elm tree?

2) What are the symptoms of a tree with DED?

3) How does DED spread? Describe the two ways.

4) What happens to the elm tree once diagnosed with DED?