But, urban trees grew even faster, by as much as 25 %, compared with
trees of the same age outside the cities, the team reports this week in Scientific Reports.
I discovered this type of plot (independently) several days ago when the question of how current size may impact the growth rate of two
trees of the same age.
When the competition or restriction is removed they are able to grow faster than unrestricted
trees of the same age.
Not exact matches
When mapping samples from groups not present in the
tree, as is the case for samples from Kent and Orkney, we find that they map onto the
same ancestral location as the Iron
Age samples (Supplementary Fig. 11), confirming that they are
of distinct ancestry from the Cornish population and other populations used in building the
tree, similarly to the Iron
Age samples.
Plus, the graphics and animation in Broken
Age are fucking flawless and seamless with a lot
of character, while in Kentucky it seems to mostly be
trees and characters standing around generically swaying from side to side in the exact
same way!
When that adjustment is made, as shown in the third table below, the
same relationships as found when using delta differences are apparent and can be shown by calculation, i.e. the regression
of SD divided by TRW versus
tree age for the entire series is significant and the differences between the first and second half
of the series where SD is divided by the TRW are also significant.
The next graph shows
tree rings
of the
same age, 50 - 60 years, but this time taken from
trees who were lucky enough to live beyond 200 years.
Since the 1st and 2nd half differences
of the difference series are statistically significant for SD and mean (the CIs do not include 0), the
tree ring
age does appear to be the critical factor when comparing
tree ring deltas for the
same tree and
same year.
Since the
trees are not
of the
same age, this indicates a collective behaviour which is not necessarily temperature related.
However, the variances
of the terms being averaged arenot the
same because
of the adjustment step and this means that any confidence intervals for the estimate may vary from year to year depending on the
ages of the
trees contributing to the that year's average.
Here «
Tree age» is the same for all rings of the same tree and is equal to the age of the tree when it d
Tree age» is the
same for all rings
of the
same tree and is equal to the age of the tree when it d
tree and is equal to the
age of the
tree when it d
tree when it died.
Also what happens if selected groups
of tree ring
ages are put through the
same algorithm or ring
age specific algorithms?
This is assumed to depend solely on the
age of the
tree and (when using RCS) to be the
same for all
trees in the regional sample.
If I got you right, you are now asking about the red line (the youngest group,
trees under 100 years
of age) in the
same graph.
Is there a connection to
same age stands
of trees and bark beetle infestations?