EcologyLesson 1 of 3 in the course Ecology and the Biosphere

Ecological Organization: Organisms, Populations, Communities, and Ecosystems

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Ecology examines how living organisms interact with one another and with their surroundings. This lesson introduces ecology’s central goals, its connections to other sciences, and two levels at which ecologists study living things: organisms and populations.

Ecology is the study of interactions between living organisms and their environment. A core goal is to understand the distribution—where organisms occur—and abundance—how many organisms are present—within the physical environment.

All flashcards

What does ecology study?
Ecology studies interactions between living organisms and their environment, including patterns in where organisms live and how abundant they are.
Why is ecology interdisciplinary?
Ecological questions often involve biological processes and environmental conditions, so ecologists use knowledge and tools from fields such as mathematics, statistics, chemistry, geology, and climatology.
What is organismal ecology?
It studies how an individual organism’s morphological, physiological, and behavioral adaptations help it live in a particular habitat.
What makes the Karner blue butterfly a specialist?
Females lay eggs only on wild lupine, and the caterpillars feed only on that plant, making the butterfly highly dependent on wild lupine.
What does population ecology investigate?
It studies the number of individuals in an area and why population size changes over time, including factors that influence survival and reproduction.

Quiz questions

  1. What does a biological community consist of?Answer: Different species living and interacting within an area.
  2. Which components are included in an ecosystem?Answer: Living organisms and nonliving components such as air, water, and soil.
  3. In the mutualism between Karner blue butterfly larvae and tending ants, what does each partner gain?Answer: Larvae gain protection, while ants gain a carbohydrate-rich food source.
  4. How can suppressing natural wildfires reduce suitable habitat for Karner blue butterflies?Answer: Woody plants can increase, reducing open areas where wild lupine thrives.
  5. What do ecosystem ecologists investigate about energy and nutrients?Answer: How they are stored and move among organisms and through air, soil, and water.

Based on Biology 2e by Mary Ann Clark, Matthew Douglas, Jung Choi (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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