Post on 03-Jan-2016
transcript
Factors affecting plants
Kim Lachler
2010NCES 6 L 2.2
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: Insects Birds Animals Fungi (mushrooms)
Insects Benefits
Help pollinate Examples:
Bees Butterflies
Provide nutrients: Example:
Fly for a venus fly trap
Provide protection: Example:
Lady bugs eat harmful insects
Harmful Eat the plant
Examples beatles
Birds
Benefits Spread seeds
Example: Blue Jays
Rid harmful insects Example:
Woodpecker
Harmful Cause damage
Example: Woodpecker
Rid helpful insects Example:
Barn swallow
Animals
Benefits: Spread seeds
Example: Squirrels
Fertilize Example:
Cows
Harmful: Causing damage
Examples: Humans Deer
Eating them Examples:
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: Water Air Sun light/Temperature Soil/nutrients
Water
1) Necessary for photosynthesis
2) Helps provide support
Air
1) Carbon dioxide need for photosynthesis
2) 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 Low pH A high hydrogen ion concentration.
Base High pH A low hydrogen ion concentration.
Neutral In the middle.
pH continue
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
BaseAcidNeutral
batt
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acid
oran
ge ju
ice/
soda
coff
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purif
ied
wat
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baki
ng s
oda
soap
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ater
drai
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eane
r
Some coping mechanisms
• Plants are not able to pick up and move
if conditions are not favorable.
• Plants can change the direction they are growing.
Examples: Phototropism - plants grow towards light
Gravitropism - plants grow upward
Thigmotropism – responding to touch
Coping mechanisms continued
• 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.
Bibliography
Plant Tropic Responses http://plantsinmotion.bio.indiana.edu/plantmotion/movements/tropism/tropisms.html 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
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/backyard-nature/web/artists-fungi-ganoderma-applanatum accessed 6/1/10
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