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
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)
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