Ancient, veteran or notable?

[kevinjohnsonmbe]

1 hour ago, Stubby said:

But , watch out for imploding bubbles in your next pint .....🙂

I was more focussed on the anti submarine warfare element of propellor cavitation in relation to acoustic signature...  But now you mention it, I'll have a Stella!  😜

[openspaceman]

1 hour ago, kevinjohnsonmbe said:

I was more focussed on the anti submarine warfare element of propellor cavitation in relation to acoustic signature... 

Shame Noel doesn't visit here anymore, he could explain why a modern sub can travel faster under water than on the surface.

 

Thread divergence due to three veterans

[daltontrees]

13 hours ago, kevinjohnsonmbe said:

I was more focussed on the anti submarine warfare element of propellor cavitation in relation to acoustic signature...  But now you mention it, I'll have a Stella!  😜

I know it's a bit of a dull subject, but 'cavitation' in trees is where the continuous column of water and other fluids in xylem or phloem gets broken, basically an air bubble in the pipe. If serious enough it can prevent further capillary translocation.

[kevinjohnsonmbe]

10 minutes ago, daltontrees said:

I know it's a bit of a dull subject, but 'cavitation' in trees is where the continuous column of water and other fluids in xylem or phloem gets broken, basically an air bubble in the pipe. If serious enough it can prevent further capillary translocation.

Not dull at all Jules - Quite the opposite!

 

Talking trees, sudden (Summer) limb drop, vitality and longevity all potentially linked with cavitation in trees.

 

But it was the selection and use of words in tree reports that was the main point of my rather tongue in cheek original post.  I think its fair to assume the OP was meaning "holes" in trees rather than low pressure air bubbles in xylem 😆

 

Researchers measure cavitation noise in trees

PHYS.ORG

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(Phys.org) —A team of researchers from Grenoble University in France has found that under experimental conditions, roughly...

 

[kevinjohnsonmbe]

28 minutes ago, daltontrees said:

I know it's a bit of a dull subject, but 'cavitation' in trees is where the continuous column of water and other fluids in xylem or phloem gets broken, basically an air bubble in the pipe. If serious enough it can prevent further capillary translocation.

This is a dull video though.... https://youtu.be/YzpDN7laepo

[Laura 12345]

14 hours ago, daltontrees said:

Well, what definitions of ancient and veteran are you using? According to Ancient Tree Forum this size is just entering the 'ancient' age span. See attached. 'Veteran' is independent of age. Unfortunately there are many disparate definitions, which is really unhelpful. Lonsdale has a 'definition of 'notable' (i.e. it's not a definition, more of a concept).

JM Age table JM version with DBHs.pdf 87.89 kB · 6 downloads

Thank you for the answer relevant to the original question! Much appreciated. I had been using the tables/charts from the Woodland Trust's Ancient Tree Guide (2008) and from D.Lonsdale's 2013 guide 'Ancient and other veteran trees', but they both differed ever so slightly in the girth at which an oak would be classed as a 'young ancient' rather than notable! Am going to do some more reading around and have a course in Epping Forest with the ATF in December about veteran/ancient trees, so hopefully will be able to learn a lot more soon. 

[daltontrees]

1 hour ago, Laura 12345 said:

Thank you for the answer relevant to the original question! Much appreciated. I had been using the tables/charts from the Woodland Trust's Ancient Tree Guide (2008) and from D.Lonsdale's 2013 guide 'Ancient and other veteran trees', but they both differed ever so slightly in the girth at which an oak would be classed as a 'young ancient' rather than notable! Am going to do some more reading around and have a course in Epping Forest with the ATF in December about veteran/ancient trees, so hopefully will be able to learn a lot more soon. 

I have sent you a message with something I think is relevant.

[daltontrees]

9 hours ago, kevinjohnsonmbe said:

Not dull at all Jules - Quite the opposite!

 

Talking trees, sudden (Summer) limb drop, vitality and longevity all potentially linked with cavitation in trees.

 

But it was the selection and use of words in tree reports that was the main point of my rather tongue in cheek original post.  I think its fair to assume the OP was meaning "holes" in trees rather than low pressure air bubbles in xylem 😆

 

Researchers measure cavitation noise in trees

PHYS.ORG

---

(Phys.org) —A team of researchers from Grenoble University in France has found that under experimental conditions, roughly...

 

Genuinely interesting. A variation on watching paint dry, I could now listen to trees dry.

[daltontrees]

9 hours ago, kevinjohnsonmbe said:

This is a dull video though.... https://youtu.be/YzpDN7laepo

Really really dull, but I watched to the end as it is an important matter potentially affecting the world supply of wines. I might try and reproduce the experiment tonight with a bottle of wine and a straw.