______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification
-Trees & decay fungi: a new approach. -THREATS
-Forensic entomology. -Decision-making & tree work for risk control
-Tree morphology & retrenchment pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics
Please email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________
Hi Rupert - don't see why not the FC Practice Guide suggests that dispersal
can occur over fairly large distances by wind, on animal hair, on the
clothing of volunteer workers (not sure why the volunteers have been singled
out) and in mud on vehicle tyres. Water dispersal seems a logical
possibility. I suppose the evidence would be prolific growth of new plants on
the river bank (or, alternatively, lack of this evidence). However the guide
also states that suitable substrate is fairly essential to successful
germination and it seems that a consistently moist environment is required
(old tree stumps / moss / woodland soil). This may exist on some river banks
but perhaps not generally.
Pictures like this suggest that it is at least a possibility
https://www.flickr.com/photos/sunnyjim36/415451474/
Tim Moya
-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info>
On Behalf Of Rupert Baker
Sent: 14 January 2021 20:03
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: rhododendron by rivers - will seeds spread downstream in water and
colonise banks lower down
______________________________________________________________________
FLAC. The Seminar, 2021. 2 days, 8 lectures, 11 hours world-class CPD
-Philosophy of tree risk assessment. -Practical hazard identification -Trees
& decay fungi: a new approach. -THREATS -Forensic entomology.
-Decision-making & tree work for risk control -Tree morphology & retrenchment
pruning. -RAVEN
13-14 May, Forest of Arden Marriott; 20-21 May, Dundee Uni Botanics Please
email enquiries@xxxxx.uk.com to register interest
______________________________________________________________________
Hi All,
A query re Rhodo ponticum - as it says in the subject line. Anyone any ideas
- scenario, river bank - upland, fast-flowing in winter; big variation in
levels winter-summer, flowing off through/off Dartmoor - acid sandy clay
granite-derived soils - what is the likelihood of seeds from the ponticum
spreading downstream - in the way eg hemlock, hogweeds, or Himalayan Balsam
do? Any observatins most useful
Atb
Rupert
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