GLOBE Phenology Investigation Budburst

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Transcript GLOBE Phenology Investigation Budburst

GLOBE Phenology Investigation
2002 & 2007
Model Secondary School for the
Observing two tree species
Silver Maple
Acer saccharinum
•Crab Apple
•Pyrus coronaria
We began observations on
Feb 20, 2007
Daily observations
Silver Maple flowers
March 12, 2007
March 14, anthers
Crab Apple budburst
Swelling March 15
Flowers & leaves burst by Mar 17
A late snow… April 7
Crab Apple
Silver Maple
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In Indiana, students reported
that this snow killed the Crab
Apple blossoms.
Silver Maple Leaves burst
#3 bud burst on April 11
Measuring the Leaf growth
every day
Bud and leaf drawings
Temperature data
Precipitation data
What we have learned….
 “I was not aware of budburst before.”
 Data showed differences in 2002 and
 Maple budburst was delayed in 2007
 The two tree species had different
 Different species respond differently to the
What we learned…
 Flower buds respond differently than
leaf buds.
 Cold temperatures delayed the Crab
Apple but did not seem to change the