Title:
Grade Level:
Subject:
Learning
Competency
Objective:
Materials:
LESSON PLAN Q4 WEEK 5
Biodiversity and Energy Transfer in Ecosystems
HI - 8
Science
1.Explain the advantage of high biodiversity in maintaining the stability of
an ecosystem.
2.Describe the transfer of energy through the trophic levels.
1.Propose the advantages and disadvantages of high biodiversity in
maintaining the stability of an ecosystem.
2.Classify high biodiversity from low biodiversity.
3.Identify the organisms in a food chain.
4.Perform the activity with incorporation on social awareness about stability
of ecosystem.
 Chalk and Board
 Handouts and Worksheets
 MELC - Modules
Procedure:
Introduction
(Monday)
Notes
Discussion
Presentation
/Conceptual
Explanation
(Tuesday to
Wednesday)
Discussion
Exercises
 Can you name the components of this ecosystem?
 How do they relate to each other?
1. Begin the lesson by asking students to define biodiversity and discuss why it
is important.
2. Engage students in a brief discussion about the different components of an
ecosystem, such as organisms, habitats, and ecological interactions.
3. Introduce the two main topics of the lesson: the advantage of high
biodiversity in maintaining ecosystem stability and the transfer of energy
through trophic levels.
HIGH BIODIVERSITY IN MAINTAINING THE STABILITY OF AN ECOSYSTEM
 The high biodiversity of the plant species will aid in the growth and
abundance of the animal species which will feed on the plant species
thus maintain stability between plant and animal species.
 It promotes great variations in the gene pool which will support the
adaptation and evolution of new traits associated in species.
 It also means a great source of medicine, food, herb, and meat for the
benefit of the human society.
Part 1: High Biodiversity and Ecosystem Stability (25 minutes): 4. Explain to
students that high biodiversity refers to a wide variety of species in an
ecosystem.
Discuss the advantages of high biodiversity in maintaining the stability of an
ecosystem:
 Stability in the face of environmental changes: Higher biodiversity
increases the resilience of ecosystems, making them more adaptable
to disturbances such as natural disasters or climate change.
 Nutrient cycling: Diverse ecosystems are more efficient at recycling
and redistributing nutrients, ensuring the availability of essential
elements for all organisms.
 Increased productivity: Biodiversity promotes higher productivity in
ecosystems, leading to more resources for organisms and a healthier
environment.
 Disease regulation: Higher biodiversity can reduce the spread of
diseases by diluting their impact among various species.
Provide examples and case studies that demonstrate the benefits of high
biodiversity in maintaining ecosystem stability.
 Facilitate a class discussion by asking students to share their thoughts,
questions, or examples related to the advantages of high biodiversity.
Part 2: Energy Transfer through Trophic Levels (25 minutes):
 Introduce the concept of trophic levels as hierarchical levels in an
ecosystem's food chain.
 Explain that energy flows through trophic levels from one organism to
another and how it is transferred through the following steps: a.
Producers (autotrophs): Photosynthetic organisms, such as plants,
algae, and some bacteria, convert sunlight into chemical energy
through photosynthesis. b. Primary consumers (herbivores):
Organisms that directly consume producers for energy. c. Secondary
consumers (carnivores/omnivores): Organisms that feed on primary
consumers. d. Tertiary consumers (top carnivores): Organisms that
feed on secondary consumers.
 Describe the 10% rule: Only about 10% of energy is transferred from
one trophic level to the next. The remaining energy is lost as heat or
used for metabolic processes.
Check
Learning
(Thursday)
Test
Conclusion
and
Application
(Friday)


Conduct quiz and test to check the learning of learners.
Checked the test, gauge and review the common mistakes of the
learners

Summarize the key points discussed during the lesson, emphasizing
the advantages of high biodiversity in maintaining ecosystem stability
and the flow of energy through trophic levels.
Encourage students to think critically about their own role in
preserving biodiversity and making sustainable choices in their daily
lives.
Address any final questions or concerns from the students.


Assessment:
Prepare by:
Worksheet:

Assign a homework task where students research and write a short
essay
Paul V. Gatpolintan – Grade 8 HI - Adviser
A. FOOD CHAIN
Directions: Place an arrow to show the flow of energy in the following food
chains.
1. Grass Grasshopper Rat Snake Hawk
2. Tiger Cat Bird Insects Plants
3. Leaves worms birds snakes
4. fox bird frog snail flower
5. Grass Worm Chicken Man
B.MATCHING TYPE
Directions: Match Column A with Column B.
COLUMN A COLUMN B
1.Ecology ________
A. Compose of community of organism in
2. Ecosystem ________
B. Study of the interactions of living
3. Organism________
C. Plants, animals and human
4. Predator ________
D. Study of living and non-living things
5. Biodiversity ________
E. An animal who is eaten in the ecosystem
6. Prey
F. Animal who eats other animal