Data Analysis Сhapter 8

University:
Washington State University
Course:
MATH 106 | College Algebra
Academic year:

2023
Views:

0

Pages:

1
Author:

Gina Fedotova

Data Analysis Some 45-53% of the world's shallow coral reefs have been destroyed or severely damaged (Core Case Study). A number of factors have played a role in this serious loss of aquatic biodiversity, including ocean warming, sediment from coastal soil erosion, excessive algal growth from fer- tilizer runoff, coral bleaching, rising sea levels, ocean acidi- fication, overfishing, and damage from hurricanes. In 2005, scientists Nadia Bood, Melanie McField, and Rich Aronson conducted research to evaluate the recov- ery of coral reefs in Belize from the combined effects of mass bleaching and Hurricane Mitch in 1998. Some of these reefs are in protected waters where no fishing is This graph tracks the effects of restricting fish- ing on the recovery of unfished and fished coral reefs darnaged by the combined effects of mass bleaching and Hurricane Mitch in 1998. (Compiled by the authors with data from Mularie McField, ut al, Status of Carib- bean Coral Reefs alter Bleaching and Hurricanes in 2005, NOAA, 2000. Report available at www.cors.лова.деб 30- Percentage coral cover (300m²) 20- 10- 1997 Mean unfished Mean fished 0 allowed. The researchers speculated that reels in waters where no fishing is allowed should recover faster than reefs in waters where fishing is allowed. The graph to the left shows some of the data they collected from three highly protected (unfished) sites and three unprotected (fished) sites to evaluate their hypothesis. Study this graph and answer the questions below. 1. By about what percentage did the mean coral cover drop in the protected (unfished) reels between 1997 and 1999? 2. By about what percentage did the mean coral cover drop in the protected (unfished) reefs between 1997 and 2005? 3. By about what percentage did the coral cover drop in the unprotected (fished) reefs between 1997 and 1999? 4. By about what percentage did the coral cover change in the unprotected (fished) reefs between 1997 and 2005? 5. Do these data support the hypothesis that coral reef recovery should occur faster in areas where fishing is prohibited? Explain. 1999 Yesar 2005

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