The document outlines the biotic and abiotic components of ecosystems, emphasizing the roles of autotrophs (producers) and heterotrophs (consumers and decomposers). It discusses the importance of different types of consumers, such as herbivores, carnivores, and omnivores, along with the function of decomposers in nutrient recycling. Additionally, it highlights significant abiotic factors necessary for survival and the impact of harmful activities on wildlife conservation.

1. Biotic and Abiotic
Components
UNIT FIVE, LESSON 5.2
BY MARGIELENE D. JUDAN

2. LESSON OUTLINE
Biotic Components
Autotrophs
Heterotrophs
1. Consumers
2. Decomposers
Abiotic Components
Conserving Wildlife

3. Components of the Ecosystem
Biotic Components – living things
Abiotic Components – non-living things

4. SUMMARY FLOWCHART (Copy!)
Ecosystem
Biotic Abiotic
Autotrophs Heterotrophs
Photosynthetic
Chemosynthetic
Consumer Decomposer
Herbivores
Carnivores
Omnivores
Scavengers
Detritivores
Saprotrophs
Soil
Sunlight
Water
Air
Temperature
Inorganic Nutrients
etc.

5. BIOTIC COMPONENTS
Composed of:
Autotrophs – produce their own food by photosynthesis or
chemosynthesis (ex. plants, phytoplankton)
Heterotrophs – feed on autotrophs for food; cannot
produce their own food (ex. animals)

6. Autotrophs
produce their own food by
photosynthesis or chemosynthesis
Can be classified as:
1. Photosynthetic – use sunlight to
make food (glucose)
2. Chemosynthetic – use inorganic
substances to make food

7. Heterotrophs
Feed on autotrophs
for food; cannot
produce their own
food
Can be a consumer
or decomposer

8. Heterotrophs: Consumers
They feed from producers or other organisms
All animals and fungi are heterotrophs.
Can be classified as:
1. Herbivores – eat only plants (producers)
2. Carnivores – eat only animals (herbivores, omnivores,
carnivores)
3. Omnivores – eat both plants and animals (producers,
herbivores, omnivores, carnivores)

9. Heterotrophs: Decomposers
They feed by eating dead organisms.
Speed up decomposition and return the nutrients to the soil
Can be classified as:
1. Scavengers – primary source of food are the dead bodies of
animals (ex. vultures, hyenas)
2. Detritivores – usu. eat decaying bodies (ex. beetles, ants,
earthworms)
3. Saprotrophs – absorb nutrients from decaying bodies (ex.
fungi, mushrooms)

10. ABIOTIC COMPONENTS
Non-living factors that living things need to survive
Examples:
Soil
Sunlight
Water
Air
Temperature
Inorganic Nutrients

11. CONSERVING WILDLIFE
We need other
living things in
order to survive
because we are
all interrelated
with each other.

12. Some Activities That Harm Wildlife
Hunting and fishing
Use of pesticides and herbicides
Deforestation
Kaingin
Cutting trees
Burning trashes

13. Assignment (1 whole sheet) Lab 2.2
Answer “Check Your Understanding”, p. 183. # 1 only.
Minimum of 3 paragraphs. (minimum of 3 sentences per
paragraph)
First paragraph – introduction (brief overview)
Body – contains the details arranged logically
Last paragraph – conclusion (summary and
recommendations)
Rubric (15 pts) next slide

14. CRITERIA 4 3 2 1
Description
(D)
Description is
complete and
clear
Description is
incomplete
but clear
Description is
incomplete
and unclear
Very short or
no
description
Presentation
(P)
Presentation
shows
originality
and
creativity.
Presentation
shows some
originality
and
creativity.
Shows some
attempt of
originality
and creativity
Presentation
is patterned
to other
person’s idea
Organization
of ideas (O)
Information is
clear and
logical
Most
information is
clear and
logical
Some
information
are clear and
logical
Information is
unclear and
illogical
Mechanics
(M)
Minimum
mistakes in
grammar and
spelling
Some
mistakes in
grammar and
spelling
Mostly
incorrect
grammar and
spelling

15. Sources:
Science Links 7