Positives

• The article gives students an opportunity to read the insights of multiple aquatic biologists.
• The article is concise and full of intriguing pictures.
  

Additional Prerequisites

• The word "hell" is quoted by one of the scientists interviewed in the article.
  
• Students should understand the importance of maintaining the health of Earth's ecosystems.
• Students should understand how climate change has lead to the endangerment of species around the world.
  

Differentiation 

• This article allows students to evaluate the Secchi disk's usefulness in gauging human impacts on the Earth's climate.
• This article provides an example of how changing climate conditions can lead to a completely new ecosystem. 
• For ELLs, it may be useful to define some words before these students dive into the reading.
• In a language arts class, this reading is an opportunity to determine the central ideas or conclusions of a scientific text.
• Environmental science classes can use this as an example of field measurements and data gathering for assessing water quality.