Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 3, The Biosphere - 3.4 - Cycles of Matter - 3.4 Assessment - Page 86: 4b

Answer

Fertilizer contains nutrients that help crops grow, but not all of the nutrients (like nitrogen and phosphorus) are used by the crops. The groundwater collects these leftover nutrients and carries them into large water bodies; these ecosystems have a natural equilibrium. The extra nutrients build up faster than the system can move back the equilibrium, and like crops, the nutrients foster faster growth of the plants in the water like algae.

Work Step by Step

Fertilizer contains nutrients that help crops grow, but not all of the nutrients (like nitrogen and phosphorus) are used by the crops. The groundwater collects these leftover nutrients and carries them into large water bodies; these ecosystems have a natural equilibrium. The extra nutrients build up faster than the system can move back the equilibrium, and like crops, the nutrients foster faster growth of the plants in the water like algae.
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