Science 10 slides based on Chapter 2 from BC Science Probe 10.

1. Interactions in
Ecosystems
1

2.  Bioticfactors = living things
(plants, animals, bacteria, fungi, protists)
2

3.  Abiotic factors = non-living things
(air, water, soil, temperature, precipitation, l
ight, etc..)
3

4.  Biosphere contains
 Biomes
 Biomes contain
 Ecosystems
 Ecosystems contain
 Habitats where a variety of
organisms live
4

5.  Ecosystem = a part of a biome in which biotic
and abiotic components interact
 Can be small  tide pools, rotting log
 Can be large  entire forest
 Biotic
components depend on Abiotic
components
5

6. ORGANISM
Individual member of a species
POPULATION
all of the members of a
certain species within an
ecosystem
6

7. COMMUNITY
all the organisms that
interact within an ecosystem
 All of the biotic factors!
ECOSYSTEM
part of a biome in which biotic
AND abiotic components
interact
7

8.  Organism
 Population
 Community
 Ecosystem
8

9.  Page 24: Questions 1-7
 Chapter 2 Review Questions
 Chapter 2 Vocabulary
9

10.  Producers
(autotrophs)
10

11.  Carnivores
 Omnivores
 Detrivores
 Herbivores
11

12.  Relationshipbetween the
“eaters” and the “eaten”
 Predators have adaptations
to help them catch prey
 Prey have adaptations to
avoid predators
 Spines, shells, camouflage, mi
micry
12

13.  Predator-prey cycle
 If numbers of prey increase, then numbers of
predators increase (more food), which then
causes numbers of prey to decrease… and so on
13

14.  Page 29: Questions 1-13
 Chapter 2 Review Questions
 Chapter 2 Vocabulary
14

15.  Symbiotic
relationships = interactions between
members of two different species
 Parasitism
meh.
 Mutualism
 Commensalism
15

16.  Both species benefit
 Biological example: bees and flowers
16

17.  One species benefits, the other is harmed
 Biological example: hookworm in dogs
17

18.  One species benefits, one is not affected
 Biological example: barnacles on a whale
meh.
18

19.  Page 32: Questions 1-11
 Chapter 2 Review Questions
 Chapter 2 Vocabulary
19

20.  Energy flow = transfer of energy from one
organism to another in an ecosystem
 Energy moves in only ONE direction in an
ecosystem
 ARROWS used to show direction of energy
flow
 Energy is LOST as it moves from one
organism to another
 Original source of energy is the SUN
20

21.  TROPHIC LEVEL = position of an organism
within a food chain
 Trophic levels:
 PRODUCERS  produce carbohydrates from
CO2, water and energy from the sun
 CONSUMERS  get energy by eating producers
and/or other consumers
21

22. 22

23.  Most
consumers
eat more
than one type
of food and
so a web
represents a
more realistic
view of what
they eat.
 Arrows point
TOWARDS
consumers
23

24.  90% energy loss at each trophic level
 Less energy reaches higher trophic levels
 Fewer organisms at higher trophic levels
24

25.  Page 37: Questions 1-11
 Page 41: Questions 1-7, 9 & 11
 Chapter 2 Review Questions
 Chapter 2 Vocabulary
25