Zebra Mussel Zebra mussel population growth in the Great Lakes is a growing concern. Zebra mussels are not native to North America, and due to their ability to rapidly multiply, they have been depleting the food sources for many of the native fish species in the Great Lakes. They are also associated with causing toxic algal blooms, preventing sunlight and oxygen access to many plants and fish life in the lakes.

Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter45: Population And Community Ecology
Section: Chapter Questions
Problem 18RQ: Which of the following events would not negatively impact Yellowstone’s grey wolf carrying capacity?...
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Zebra Mussel
Zebra mussel population growth in the Great Lakes is a growing concern. Zebra mussels are not native to North America, and due to their ability to rapidly multiply, they have been depleting
the food sources for many of the native fish species in the Great Lakes. They are also associated with causing toxic algal blooms, preventing sunlight and oxygen access to many plants and fish
life in the lakes.
Alexander Hardy CC-BY. Retrieved from Flickr
Three years ago, a 5 km³ section of the Great Lakes was studied and approximately 89 000 zebra mussel colonies were found. Each colony produced 120 colonies over a three-year period.
However, only 2% of the new colonies survived past the first year.
Over the three years, there were 97 000 dead colonies that were washed ashore in the Great Lakes. Many of the zebra mussels attach themselves to hard surfaces, such as boats and trailers. It
was estimated that approximately 85 000 colonies attached themselves to boats and left the area. Many of these zebra mussels died, but some managed to hitchhike on boat equipment and
enter other waterbodies. Negligible numbers of zebra mussels migrated from other lakes.
Calculate the change in population size.
Show all your work and round your answer to the nearest whole number ex) 50
Transcribed Image Text:on 5 saved out of Zebra Mussel Zebra mussel population growth in the Great Lakes is a growing concern. Zebra mussels are not native to North America, and due to their ability to rapidly multiply, they have been depleting the food sources for many of the native fish species in the Great Lakes. They are also associated with causing toxic algal blooms, preventing sunlight and oxygen access to many plants and fish life in the lakes. Alexander Hardy CC-BY. Retrieved from Flickr Three years ago, a 5 km³ section of the Great Lakes was studied and approximately 89 000 zebra mussel colonies were found. Each colony produced 120 colonies over a three-year period. However, only 2% of the new colonies survived past the first year. Over the three years, there were 97 000 dead colonies that were washed ashore in the Great Lakes. Many of the zebra mussels attach themselves to hard surfaces, such as boats and trailers. It was estimated that approximately 85 000 colonies attached themselves to boats and left the area. Many of these zebra mussels died, but some managed to hitchhike on boat equipment and enter other waterbodies. Negligible numbers of zebra mussels migrated from other lakes. Calculate the change in population size. Show all your work and round your answer to the nearest whole number ex) 50
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