Southern Illinois University Chapter 3 Inspect the Chesapeakes Report Card

Question Description

The map in the attachment is just an example image of the Chesapeake Bay. Please find the chlorophyll a concentration here:

https://ian.umces.edu/ecocheck/report-cards/chesapeake-bay/2013/

Click: Indicators

Then choose “2013”

Then in the ‘Select an Indicator” column choose “Chlorophyll a”.

You will see the map.

Click any item in the bar (including: Threshold Map, Data Map, Ranking, Trends Graph, Threshold Levels, and Additional Info) to get more information of chlorophyll a.

Please read the maps and the articles, then answer the questions in the word file.

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Chapter 3 Topic: Data Analysis Title: Inspect the Chesapeake’s Report Card Nutrients are an important concern in the Chesapeake Bay watershed, now you can examine the details and see how conditions have changed. Go to www .eco-check.org/reportcard/chesapeake. This site is maintained by the University of Maryland and the National Oceanic and Atmospheric Administration (NOAA), with support of many collaborators and data providers. Chlorophyll is something you’ve read about in this chapter. Concentrations of chlorophyll in Chesapeake Bay indicate amounts of tiny floating algae cells—algae nourished by nitrogen and phosphorus from onshore sources. Take a look at chlorophyll-a levels in the bay: roll your mouse over the “Indicators”, select year ‘2013’, in the Indices, click on the “chlorophyll-a” icon (this is one of several kinds of chlorophyll). Take a few minutes to look at the Threshold map, as well as the definitions to answer the questions below. Questions: 1. What is chlorophyll-a used to measure? What factors increase the amount of chlorophyll-a in the water? 2. This map shows areas exceeding healthy levels (thresholds) of chlorophyll. Thresholds differ from fresh to salty parts of the estuary, and by season. Are excessively high levels detected in much of the bay, or in small areas? 3. How many sampling points were used to produce this map? Were the stations sampled just once? Why or why not? 4. Now look at the Trends Graph tab. Overall would you say that the trend has been an improvement since 1986? Turn on and off the different tributary rivers (different colored boxes beside the graph). Which one has had the lowest score in general? Where is the worst one located? 5. Refer to your chapter, and explain what chlorophyll needs to perform photosynthesis. Why are nitrogen and phosphorus needed for plant growth? 6. Choose one other indicator (such as the Biotic Index or Dissolved Oxygen) from the drop-down menu. Explain what that index is, and why it is useful as an indicator of water quality. Chapter 3 Topic: Data Analysis Title: Inspect the Chesapeake’s Report Card Nutrients are an important concern in the Chesapeake Bay watershed, now you can examine the details and see how conditions have changed. Go to www .eco-check.org/reportcard/chesapeake. This site is maintained by the University of Maryland and the National Oceanic and Atmospheric Administration (NOAA), with support of many collaborators and data providers. Chlorophyll is something you’ve read about in this chapter. Concentrations of chlorophyll in Chesapeake Bay indicate amounts of tiny floating algae cells—algae nourished by nitrogen and phosphorus from onshore sources. Take a look at chlorophyll-a levels in the bay: roll your mouse over the “Indicators”, select year ‘2013’, in the Indices, click on the “chlorophyll-a” icon (this is one of several kinds of chlorophyll). Take a few minutes to look at the Threshold map, as well as the definitions to answer the questions below. Questions: 1. What is chlorophyll-a used to measure? What factors increase the amount of chlorophyll-a in the water? 2. This map shows areas exceeding healthy levels (thresholds) of chlorophyll. Thresholds differ from fresh to salty parts of the estuary, and by season. Are excessively high levels detected in much of the bay, or in small areas? 3. How many sampling points were used to produce this map? Were the stations sampled just once? Why or why not? 4. Now look at the Trends Graph tab. Overall would you say that the trend has been an improvement since 1986? Turn on and off the different tributary rivers (different colored boxes beside the graph). Which one has had the lowest score in general? Where is the worst one located? 5. Refer to your chapter, and explain what chlorophyll needs to perform photosynthesis. Why are nitrogen and phosphorus needed for plant growth? 6. Choose one other indicator (such as the Biotic Index or Dissolved Oxygen) from the drop-down menu. Explain what that index is, and why it is useful as an indicator of water quality. …
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