What is meant by the term keynote species? Explain why it is ...

[Sportsfan2111]

What is meant by the term keynote species? Explain why it is important to issues of biodiversity and extinction.
 
  What will be an ideal response?

Question 2

Discuss the importance and impact of the Yangtze and Huang He (Yellow) rivers in China, including both their positive and negative aspects.
 
  What will be an ideal response?

[jxjsniuniu]

Answer to Question 1

A keynote species is a species whose survival is essential to the success of the ecosystem as a whole. If keystone species go extinct, it threatens the health and viability of the entire ecosystem.

Answer to Question 2

Both the Yangtze and Huang He rivers are important physical resources. On the positive side, these rivers provide a source of water, hydroelectric power, and transportation. On the negative side, both rivers have repeatedly flooded over their banks, causing significant loss of life as well as economic loss. The Three Gorges Dam is designed, in part, to ease flooding on the Yangtze River.

[Sportsfan2111]

Gracias!

[amit]

Thanks for the timely response, appreciate it