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World's tallest trees grow in thermally similar climates (giant trees,…
World's tallest trees grow in thermally similar climates
tree height
competitive fitness
benefit
place leaves higher
reduce bellow ground competition
supress competitors
wind-dispersed
polen
fruits
reduce deleterius effects
fire
climbers
challenges
biochemichal
resisting wind forces
resist own weigth
transportational
water by xylem
phloem too
energetically costly
mechanisms to limit height
genetically programmed
reduce or stop growth in height
realocate to reproduction
reduce risks
winds
lightning
giant trees
broad climatic envelope
which also support bunch of not giant trees
temperature
colder
reduce productivity
warmer
increase maintenance costs
average annual temperature
seasonal temperature variation
precipitation is poor predictor
height and diameter
tree allometry
varies
but generally consistent
support biomechanics
trunk
dead heart wood
mechanical
location
valley bottoms
summer fog
canopy drip
reversed transpiration
downhill direction
trees >90 height
oceania
north america
average
7 - 15,4 °C
variation
7 - 19,7 °C
trees 80 - 90 m
20 trees
9 similar to >90s
3 tropical trees
archipelago between asia and australia
in neotropical rainforests
shorter trees
wider crowns
Feldpausch et al., 2011
refugia
insignificant disturbances
growth for centuries
Pickett & White,1985
100 km from the ocean
sea breeze
cooler daytime temperature
greater leaf area
umbrella strategy
reduce root competition
supressing neighbours
reduce lightning
full light
trees from tropical highlands
short height
strong winds
shallow soils
climatic isolation
landslides
fires