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Chapter 36: Problem 116

Elk migrate from summer feeding grounds in high mountain meadows down into lower valleys during winter. Using the words behavioral changes, physiological changes, seasonal changes, and migration, write the order of events that occur to bring about this migration. a. seasonal changes, physiological changes, migration, and behavioral changes, respectively b. physiological changes, seasonal changes, behavioral changes, and migration, respectively c. seasonal changes, behavioral changes, physiological changes, and migration, respectively d. seasonal changes, physiological changes, behavioral changes, and migration, respectively

Short Answer

Expert verified
Option d is correct.

Step by step solution

01

Identify Key Concepts

Understand the key concepts: seasonal changes, physiological changes, behavioral changes, and migration. These elements interact to bring about the migration of elk.
02

Understand Seasonal Changes

Seasonal changes, such as a decrease in temperature and availability of food, trigger the need for elk to migrate. These external environmental factors are the initial cause.
03

Recognize Physiological Changes

Due to seasonal changes, elk undergo physiological changes, like changes in body fat and hormonal levels, preparing their bodies for the journey and adaptation to new environments.
04

Identify Behavioral Changes

Physiological changes lead to behavioral changes, such as increased movement and restlessness, prompting the elk to begin the process of migration.
05

Understand Migration

Finally, these physiological and behavioral changes culminate in the act of migration, where elk move from higher meadows down to lower valleys for the winter.
06

Select the Correct Answer

Compare the information to the given options. The correct sequence is: d. seasonal changes, physiological changes, behavioral changes, and migration, respectively.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Seasonal Changes
The migration of elk is closely tied to seasonal changes. As the seasons shift, different environmental factors influence the elk's habitat and food sources. During the summer, elk thrive in high mountain meadows where the temperature is moderate, and plenty of vegetation is available.
However, as fall approaches, temperatures drop, and food becomes scarce in these high-altitude regions. This triggers the need for elk to find more suitable habitats. Such changes in the environment are the primary triggers for migration, setting off a chain reaction of physiological and behavioral changes.
By understanding the role of seasonal changes, we can see how the environment directly impacts the life cycle and habits of elk, ultimately leading to their migration.
Physiological Changes
In response to seasonal changes, elk undergo significant physiological changes. These changes prepare their bodies for migration and help them adapt to the new conditions they will face in lower valleys. One major physiological change is the accumulation of body fat. Elk start to build up their fat reserves in preparation for the long journey and to survive potential food shortages during the winter.
Hormone levels also fluctuate, influencing their energy levels and reproductive cycles. For instance, increased cortisol levels can help elk manage stress and stay alert during migration. These physiological adaptations are crucial for ensuring that the elk can undertake and sustain long migrations.
By understanding these changes, we recognize how nature equips elk to handle the challenges of their environment.
Behavioral Changes
Physiological changes lead to notable behavioral changes in elk. As their bodies prepare for migration, elk exhibit increased movement and restlessness. They begin to gather in larger groups, which can offer better protection and guidance during migration. Another significant behavioral change is shifting their feeding and resting patterns.
Elk may start feeding more intensively before migration to build energy reserves. They also become more active in seeking out optimal routes for their journey. These behavioral adjustments are essential as they enable the elk to efficiently move from higher to lower altitudes in search of more favorable conditions.
Understanding these behavioral changes helps us see the intelligence and adaptability of elk, ensuring their survival through changing seasons.

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