Chalara fraxinea - Generic thread

[Stere]

Intetesting.

 

I think the main impact to landscape will be loss of hegderow trees (ash the most common one locally) as woodland will regenerate other species replacing the ash, but the hegderow trees won't come back as any new trees are flailed.

 

Thats want happened after dutch elm, massive reduction in number of hegderow trees, countryside just looks more bleak since with miles of hegdes with fewer trees along them.

 

 

[Woodworks]

 Might add a tiny bit of encouragement https://www.bbc.co.uk/news/science-environment-46440389?fbclid=IwAR3YvXhhigmJ5-2GPrsi2OGj3sneVJCv_jJoD5xcc_IjggZdH_Z21vkbtLQ

Edited December 6, 2018 by Woodworks

[Gary Prentice]

That's certainly lower mortality rates than have previously been published. 

[averagearborist]

Like Stere says, possibly the most grievous loss will be in the hedgerows. The implications have so far been explored in a woodland context, whereas the impact of open grown ash in a non woodland context, for both landscape and ecology, will certainly be difficult to study and will be markedly felt by everyone.

The point about flailing is also particularly relevant, as it reduces the likelihood of the hedgerow tree population being replaced by other species in the medium term, or resistant ash in the long term.

Perhaps when the dieback takes the ashes from our landacape, there will be sufficient motivation to nurture hedgerow trees and encourage some kind of restocking.

[Gary Prentice]

I don't know, a huge percentage of our local large street trees are Ash. Lots of roads will end up looking like Sheffield, with loads of heavy standards replacing 60-70 ft mature Ash.

 

it will make a huge difference in our urban environment

[Woodworks]

In the news today

 

https://www.bbc.co.uk/news/science-environment-48155222?fbclid=IwAR39qro2-Ivdsqz3OigIIowfLfOUjS9j7wiTh1Nbw3iAUSlFcLxrr30SOMY

[Chrissy]

can't quite work out where they get the 15 billion figure from

[Gary Prentice]

Just now, Chrissy said:

can't quite work out where they get the 15 billion figure from

Several years ago our LA were estimating a cost of £10 million just for highway trees and LA trees within falling distance of the road. I'm pretty sure that they've revised that figure upwards due to under-estimating the percentage of ash in the population.

 

 

[difflock]

On 06/12/2018 at 18:11, Woodworks said:

 Might add a tiny bit of encouragement https://www.bbc.co.uk/news/science-environment-46440389?fbclid=IwAR3YvXhhigmJ5-2GPrsi2OGj3sneVJCv_jJoD5xcc_IjggZdH_Z21vkbtLQ

30 is a significent %age to survive, I could live with that figure, thanks.

[Lucan]

7 hours ago, Chrissy said:

can't quite work out where they get the 15 billion figure from

The figure comes from;

• £2.7bn for safety felling roadside trees
• £1.6bn for safety felling urban trees
• £4bn for woodland ecosystem loss
• £5.3bn for non-woodland ecosystem loss
• Rest is from safety felling of railway line trees, replanting, etc

 

7 hours ago, Gary Prentice said:

Several years ago our LA were estimating a cost of £10 million just for highway trees and LA trees within falling distance of the road. I'm pretty sure that they've revised that figure upwards due to under-estimating the percentage of ash in the population.

 

Considering there is an estimated 4m ash trees within falling distance of a road, of which around 35% are under public ownership, that does seem like an underestimation.

 

2 hours ago, difflock said:

30 is a significent %age to survive, I could live with that figure, thanks.

Figure has been updated and now 95% is the expected mortality rate