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Chapter 56: Q1CC (page 1258)

How can the addition of excess mineral nutrients to a lake threaten its fish population?

Short Answer

Expert verified

A higher amount of mineral nutrients in water systems (such as lakes) will increase the numbers of algae population and their growth rate. Excess algae population in the lakes will reduce the dissolved oxygen level under the lake.

Fishes use the dissolved oxygen from the water, so low oxygen levels can destroy the fish ecosystem and other aquatic animals such as oysters and crabs.

Step by step solution

01

Definition of minerals

Minerals are inorganic elements that are homogeneous solid with internal structures.Minerals are formed naturally and have specific physical properties. Examples of minerals are amphibole, feldspar, olivine, and others.

02

Algal growth

Low levels of oxygen will increase algal growth. The primary reason for the increased production of algae is the presence of phosphorous. Algae are decomposable, and due to this decomposition process of algae, the requirement of dissolved oxygen is vital.

03

Effects on fish population

In water resources, dissolved oxygen will regulate the levels of both nitrogen and phosphate. Most aquatic organisms will require dissolved oxygen for preparing their foods. Also, a low amount of oxygen will push the fishes into shallow waters.

The survival rate for the fishes will decrease,and fishes will die in the absence of enough oxygen levels required for their respiration process. Fishes will not be able to produce energy.

  1. From the water, fishes can absorb dissolved oxygen directly. The dissolved oxygen will reach the bloodstream through their gills instead of the lungs.

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Most popular questions from this chapter

Which of the following statements best distinguishes hypotheses from theories in science?

a. Theories are hypotheses that have been proved.

b. Hypotheses are guesses; theories are correct answers.

c. Hypotheses usually are relatively narrow in scope; theories have broad explanatory power.

d. Theories are proved true; hypotheses are often contradicted by experimental results.

A mole is the number of particles of a substance with a mass equivalent to its molecular (or atomic) mass in daltons. There are 6.022脳1023molecules (or atoms) in 1.0 mole (Avogadro鈥檚 number; see Concept 3.2). The data table shows the 鈥渕olar ratios" of some of the products from the Miller H2S experiment. In a molar ratio, each unit鈥檚 value is expressed relative to a standard for that experiment. Here, the standard is the number of moles of the amino acid glycine, which is set to a value of 1.0. For instance, serine has a molar ratio of 3.0脳10-2, meaning that for every mole of glycine, there is 3.0脳10-2mole of serine.

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