David Humphries
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Everything posted by David Humphries
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BS8596 ‘surveying for bats in trees and woodland’
David Humphries replied to patrick stileman's topic in General chat
Partrick has posted this on other sites. I'm sure he'll update here, but in the meantime here is a link to the new BS 8596:2015 Surveying for bats in trees and woodland. BS 8596 - Surveying for bats in trees and woodland. Guide | BSI Also a link to the BSi micro guide which is aimed at non bat specialists, which is free to download. http://shop.bsigroup.com/forms/Bat-Microguide--BS-8596--BSI-Group/Thank-you-Bat-Microguide--BS-8596--/ . -
Cool, he's a good guy hey ! Happy to share his knowledge and passion on photography so we both get a load out of the time together. We took him up in a Mewp a few months ago to shoot the City of London from above the tree canopy at work and hoping to get him in a harness soon. .
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Maybe Jim, to be honest I didn't get a close up look to see wether it was suffering from typical AOD symptoms like stem bleeds etc.....as the image was taken from my car whilst queuing to get in to a show. Might get the chance to look a bit closer in the future. .
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A topped lime with Armillaria mellea. Not really a falling hazard to the target any time soon, but reduced energy production will not help combat the associated root dysfunction and decay. . .
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Here's a retrenching oak I saw in a country park in Suffolk earlier today, where the lower crown is attempting to find an equlibrium of root growth/foliar energy production Surprised it appears to be maintaining as wide a peripheral branch growth as it is, and not shutting them down as well. .
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In the states, is a tree like this likely to be pruned toward the inner growth or felled as a declining tree Guy? .
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£7 entry for me the wife and two kids with our family Nt membership. Not sure I would have gone without it. Thought it was a nice small event with a decent blend of things for the kids plus craft stalls. The sun helped. Good to catch up with the Bullman and Haine clans, sorry I didn't see anyone else. .
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Will do .
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Thanks for the heads up, might try and get across. .
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Yep, it looks like something has gnawed the tops rather than the white being the unopened veil as in the birds nests. .
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I would say that's a tree showing retrenchment Josh. roots possibly compromised by the road. .
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Not often, but a few times .
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Certainly looks like young forming squarrosa .
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I think Pleurotus dryinus (veiled oyster) is a decent shout .
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Morphology in fruitbody development is a very complex field, I often trip up on erarly developing brackets and mushrooms. Fung Eh ! .
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No worries, what did you think they were? .
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Birds nest fungi, (Cyathus striatus) saprophytic on mulch mainly but to be found on decaying woody volumes on the ground. Gallery in the fungi directory on the main web site. http://arbtalk.co.uk/forum/tree-fungi-194.html .
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Out for a bimble with a well regarded wildlife photographer who's making a book about the place where I work. Showed him some fung and talked cameras a bit. Amanita muscaria (the fly agaric) decided to make the session all the more interesting, photographically. .
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Guy, we didn't remove that percentage of canopy due to decay (the trunk is actually quite sound) the below image shows where we worked on the 'red' section to rebalance/restructure the asymetrical crown which had been left after significant storm damage some decades before. We did not touch the 'blue ' side of the tree. That particular section of crown has been left to reiterate/rejuvenate on its own, Our 'retrenchment' plan is to bring back in the 'sticky out bit' to produce a more symmetrical lower canopy to lessen wind load on the over extended section. Couple of other images attached to show the tree in its context from 100 years ago. .
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Based upon my/our observations of retained and detached branches I would think that the decay is more akin to soft rot where wood initially becomes brittle due to cellulose degradation. This often results in ceramic brittle fracture of affected parts should they fail. Similar to what we see in Massaria branch failure or Kretzschmaria trunk failure.......carrot snapping. .
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Likely to be one of the Ganoderma species .
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An oak that we started a (first phase) retrenchment program on a few years ago. No before image (bizarrely) but you can see in the second shot the pruning cuts and also the lower canopy that we will be reducing down towards. We should be returning to this tree in the next year or so to attempt to keep on track with the Individual Tree Management Plan (ITMP) schedule regarding its retrenchment phase. .
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A number of tree species, including (some) Limes, Robinia and Elm have the ability to naturally sprout from the base as a reflection of the life stage that they're currently at. This can be described as its 'Ontogenetic age' as opposed to its 'Chronological or Physiological age' The latter two describe the actual age and the actual vigour/health of the tree at its current point in time, where as the former describes the point where the tree is in its phase of life (seedling, juvenile, adult, veteran etc....) when talking about basal sprouting for instance, this is where the tree will/can utilise its natural regenerative ability (putting on lots of additional foliage) to continue its existence. The basal/trunk sprouters are generally trees that coppice well. .
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I'm pretty confident that it's Meripilus. Although I've seen Grifola frondosa on a couple of host species (including Prunus) I don't think I've ever come across it on Sorbus. Ofcourse this doesn't mean that its never been documented. For comparison here's an old thread that shows a 'few' of the varied host species associated with Meripilus giganteus http://arbtalk.co.uk/forum/fungi-pictures/49997-meripilus-giganteus-giant-polypore-its-host-range.html Your last image (if its of the underside of a frond) appears to show very small pores, G. frondosa has larger and more visible pores than M. giganteus. .
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This ash is taking its first little steps toward moving home, all be it only a couple of centimeters away .
