Worksheet: Chapter 3: Ecosystem Ecology - Math Monday
Comprehension worksheet generated from the video "Chapter 3: Ecosystem Ecology - Math Monday".
Worksheet: Chapter 3: Ecosystem Ecology - Math Monday
JaxDoc
Vocabulary
- 10% Rule — An ecological principle stating that, on average, only 10% of the energy from one trophic level is transferred to the next.
- Trophic Level — The position an organism occupies in a food chain, indicating its feeding relationship to other organisms.
- Joule (J) — A standard unit of energy measurement, used in the Serengeti ecosystem example.
- Kilocalorie (kcal) — A unit of energy measurement, often used to quantify the energy content of food, as seen in the Grass-Rabbit-Fox-Hawk pyramid.
- Hectare (ha) — A unit of area equal to 10,000 square meters, used for measuring large land areas like plantations.
Questions
Watch the video carefully and answer the following questions based on the information presented.
1.
In the Serengeti ecosystem example (0:46-4:29), how much energy in Joules (J) is available for the third trophic level, assuming the 10% rule applies?
2.
Using the Grass-Rabbit-Fox-Hawk pyramid (4:45-6:35), if grass begins with 100,000 kcal and the energy efficiency from grass to rabbit is 12%, how much energy in kcal moves to the rabbit trophic level?
3.
In the “Do the Math: Raising Mangoes” scenario (10:04-12:30), the village has 225 people and aims to generate a per capita income of $300 per year. What is the total annual income desired for the entire village?
4.
Based on the “Do the Math: Raising Mangoes” problem, if the village’s total annual income goal is 75 worth of fruit per year, how many mature trees will the village need to meet their goal?
5.
The video demonstrates that a significant amount of energy is lost at each successive trophic level. Discuss two implications of this energy transfer inefficiency for human food consumption patterns and global food security.
