At a global scale, harmful algal blooms (HABS) are appearing in many places, often new places, and lasting longer than previously recorded. Across Florida, the occurrence of algal blooms, caused by various species of phytoplankton, has been intensifying. In the summer of 2016, a state of emergency was declared because a toxic cyanobacterial bloom occurred in Lake Okeechobee which spread into and throughout the St. Lucie River and Estuary. Water samples collected during the bloom helped identify a limiting nutrient. 1. Data from a Burger et al. (2004) indicate that mercury levels in Florida gar, top-level predators, from Lake Okeechobee were not higher than mercury levels of fish muscle from other locations in the United States. However, mercury levels in the livers of Florida gar were above the level considered safe for human consumption. a. Explain why this is good news for people who fish in Lake Okeechobee. b. Explain why this is bad news for non-human consumers of fish, and how it might be bad news for the ecosystem as a whole.

At a global scale, harmful algal blooms (HABS) are appearing in many places, often new places, and lasting longer than previously recorded. Across Florida, the occurrence of algal blooms, caused by various species of phytoplankton, has been intensifying. In the summer of 2016, a state of emergency was declared because a toxic cyanobacterial bloom occurred in Lake Okeechobee which spread into and throughout the St. Lucie River and Estuary. Water samples collected during the bloom helped identify a limiting nutrient. 1. Data from a Burger et al. (2004) indicate that mercury levels in Florida gar, top-level predators, from Lake Okeechobee were not higher than mercury levels of fish muscle from other locations in the United States. However, mercury levels in the livers of Florida gar were above the level considered safe for human consumption. a. Explain why this is good news for people who fish in Lake Okeechobee. b. Explain why this is bad news for non-human consumers of fish, and how it might be bad news for the ecosystem as a whole.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter43: The Biosphere

Section: Chapter Questions

Problem 3CT

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