1. October 18
23 the ‘detrended’
ring-width
Sampling aggregate
The linearstrategies model of tree growth
index
2. THE PRINCIPLE OF
ECOLOGICAL AMPLITUDE
A tree species may grow and reproduce over a certain range
of habitats; that range is described as its ecological amplitude.
Trees that grow near the margins or limits of their ecological
amplitude are o en sensitive to changes in their environment.
5. Average temperatures are remarkably consistent at treeline locations around the world.
Source: Körner and Paulsen, Journal of Biogeography, 2004
6. THE LAW OF THE MINIMUM
Growth is controlled by the scarcest resource
(limiting factor), not the total amount of
resources available
7. THE PRINCIPLE OF
SITE SELECTION
Dendrochronologists should apply the principles of
limiting factors and ecological amplitude to determine
which trees are most likely to provide information about a
specific environmental signal.
8. ecotone a transitional area where one plant community changes
into another, usually caused by changes in the environment such
as changes in elevation or soil characteristics.
44. Pederson, N. 2010. External characteristics
of old trees in the Eastern Deciduous Forest.
Natural Areas Journal 30, 396:407.
45. SIX
CHARACTERISTICS OF OLD TREES
smooth bark
low stem taper
high stem sinuosity
crowns with few, thick, twisting limbs
low crown volume
low ratio of leaf area to trunk volume
62. THE PRINCIPLE OF
CROSS-DATING
THE PRINCIPLE OF
AGGREGATE TREE GROWTH
THE PRINCIPLE OF
REPLICATION
STANDARDIZATION
THE PRINCIPLE OF
ECOLOGICAL AMPLITUDE
THE PRINCIPLE OF
SITE SELECTION
