30 Jun Indiana University Bloomington Estuary Food Webs Reflective Discussion
Question Description
Instructions
Your essay answer should be clear and succinct, amounting to perhaps 3-5 sentences totaling 50 to 80 words; longer essays are strongly discouraged. It is recommended that you prepare your answer in a separate document from which you copy it into Canvas.
Question 1 5 pts
Describe the two major controls that play a role in the mixing of saltwater and freshwater in estuaries and how the relative importance of these two factors determines the resultant salinity characteristics of the estuary.
A strong answer will describe the two major factors that determine the salinity characteristics of estuaries, noting the names given to the three types of estuarine circulation that are produced, and describing their characteristics in terms of both the changes in salinity from river to ocean and the extent of stratification within the estuary.
Question 2 1 pts
Which of the following types of estuary is most likely to be strongly stratified with stagnant bottom waters?
Fjords
Drowned river valley estuaries
Bar-built estuaries
Tectonic estuaries
Wide estuaries
Question 3 1 pts
What is the major difference between food webs in estuaries and those in the open ocean?
Sediment detritus serves as the basis of estuarine food webs
Benthic organisms rather than phytoplankton serves as the basis of estuarine food webs
The role of fish is diminished in estuaries
The order of trophic levels is reversed
There are no major differences between food webs in estuaries and in the open ocean
Question 4 3 pts
Identify which label best describes the characteristics of each of the three specific locations (A, B, C) in the Google Earth images of coastal estuaries. (Individual options for answers can be used more than once.)
15RQImageA.png
Location A in Image 1
Location B in Image 2
Location C in Image 3
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