provide me some source that talk about how to measure biodiversity

Sure, here are some sources that discuss how to measure biodiversity:

1. "Measuring Biodiversity" by Anne E. Magurran. This book provides a comprehensive guide on different methods to measure biodiversity. It's available on Amazon and other book retailers.

2. The website of the Convention on Biological Diversity (https://www.cbd.int/) has a lot of resources and articles about biodiversity, including methods to measure it.

3. The Biodiversity A-Z website (https://www.biodiversitya-z.org/content/biodiversity-measurement) provides a simple and straightforward explanation of how biodiversity is measured.

4. The article "Measuring Biodiversity for Conservation" by Richard D. Gregory and David W. Gibbons, published in the Annual Review of Ecology, Evolution, and Systematics, provides an in-depth look at biodiversity measurement methods.

5. The website of the Food and Agriculture Organization of the United Nations (http://www.fao.org/3/i2195e/i2195e03.pdf) has a detailed guide on measuring biodiversity in relation to food and agriculture.

6. The article "Biodiversity metrics: Variety is the spice" by Mark Vellend, published in Nature, discusses different metrics used in biodiversity measurement.

Remember to check the credibility of your sources when researching.