Transcript Factors affecting plants

Factors affecting plants
NCES 6 L 2.2
Kim Lachler
2010
Biotic vs. Abiotic

Biotic


Living or once
living
 “Bio” – means
life
Abiotic

Non living
 “A” – means
without
Biotic

They can have a positive affect or negative
affect.

What do you think are biotic factors that
affect plants?

Some are:


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
Insects
Birds
Animals
Fungi (mushrooms)
Insects

Benefits

Help pollinate

Examples:


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Provide nutrients:

Example:
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Bees
Butterflies
Fly for a venus fly
trap
Provide protection:

Example:

Lady bugs eat
harmful insects

Harmful

Eat the plant

Examples

beatles
Birds

Benefits

Spread seeds

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Example:
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Cause damage

Blue Jays
Rid harmful insects

Harmful
Example:
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Woodpecker
Example:

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Woodpecker
Rid helpful insects

Example:

Barn swallow
Animals

Benefits:

Spread seeds

Harmful:

Example:

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Causing damage

Squirrels


Fertilize

Example:

Cows
Examples:
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Humans
Deer
Eating them

Examples:

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Humans
Deer
Fungi


Benefit:

Provide nutrients

Example:

Mushrooms
breaking down dead
wood into soil.
Harmful:

Weaken healthy
plants

Example:

Artist fungi
Abiotic

They also can have a positive affect or
negative affect.
 What do you think are abiotic factors that
affect plants?
 Some are:
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Water
Air
Sun light/Temperature
Soil/nutrients
Water
1)
2)
Necessary for
photosynthesis
Helps provide
support
Air
1)
2)
Carbon dioxide
need for
photosynthesis
Oxygen for
respiration
Sunlight/Temperature
Sunlight
1) Need for
photosynthesis
Temperature
1) Affects absorption
Soil
1) Provides the necessary nutrients
(minerals) to aid in overall health and
chemical reactions.
2) Gives the roots support
3) Where the roots absorbs water
4) pH affects adaptations
pH

The concentration of hydrogen ions in a solution

Acidic



Base



Low pH
A high hydrogen ion concentration.
High pH
A low hydrogen ion concentration.
Neutral

In the middle.
5
6
7
8
9
Acid
10
11
12
13
drain cleaner
4
soapy water
3
baking soda
2
purified water
1
coffee
0
orange juice/soda
battery acid
pH continue
14
Neutral
Base
Coping Mechanisms
•Plants are not able to pick up and move if
conditions are not favorable.
They have to deal with them in other ways.
Coping mechanisms
•
•


A temporary state of minimal activity or inactivity.
Usually as a response to poor growing conditions.
Examples:
Winter dormancy - Deciduous trees loosing their leaves in
the fall.
Intense heat dormancy -Grass stop growing and conserve
energy until conditions are better.
Coping mechanisms continued
•
Plants can change the direction they
are growing.
Examples:
 Phototropism - plants grow towards light

Gravitropism (Geotropism) - plants grow
upward away from gravity. Roots grow
downward towards gravity.

Thigmotropism – responding to touch
Bibliography

Plant Tropic Responses
http://plantsinmotion.bio.indiana.edu/plantmotion/movements/tropism/tropisms.ht
ml accessed 6/1/10

Decelles, Paul, The pH Scale http://staff.jccc.net/pdecell/chemistry/phscale.html
accessed 6/1/10
Iannotti, Maria, Dormancy - What Does it Mean When a Plant Goes Dormant?
http://gardening.about.com/od/seasonalgardening/g/Dormancy.htm
accessed 6/1/10
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The Mysterious Venus’ Flytrap http://www.botany.org/bsa/misc/carn.html
accessed 6/1/10
Woodpecker http://en.wikipedia.org/wiki/Woodpecker accessed 6/1/10
Davis, Mark, Artist’s Fungi http://groups.google.com/group/backyardnature/web/artists-fungi-ganoderma-applanatum accessed 6/1/10
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