Answered: Lake Mendota is a lake with high levels…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Lake Mendota is a lake with high levels of nutrient input from agriculture that has the potential to fuel blooms of phytoplankton. In 2009 the invasive spiny water flea Bythotrephes (native to Europe and Asia) was first detected in the lake. In the figure, the food web for Lake Mendota prior to the invasion is on the left, and after the invasion on the right. Bythotrephes is a more effective predator of the herbivorous zooplankton Daphnia than the native planktivorous perch (represented by the large red arrows between Bythotrephes and Daphnia), and perch consume Bythotrephes at much lower rates than they do Daphnia (represented by the small red arrows between perch and Bythotrephes). See attached image

Imagine that the lake was also contaminated with heavy metals. In which taxa would the concentration of heavy metals by highest?

a) phytoplankton

b) daphnia

c) perch

d) pike

and why?

pike
perch
1988-2008
+
+
Daphnia
·↑↓
+
11
phytoplankton
pike
perch
2009-2015
+
+
Daphnia
+
↑↓
↑↓
+
11
phytoplankton
Bythotrephes

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