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Sam Archer

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  1. I would certainly agree with the initial assessment of Auricularia auricula-judae; this fungus is saprophytic. I can only assume you are inquiring for academic purposes rather than for a client?
  2. Fistulina hepatica is usually a weak parasite. It may be worth assessing the overall visual health of the tree may assist you in determining how the tree is dealing with this parasite. However, it is worth remembering that brown-rot fungi breakdown the cellulose and leave the lignin behind, this will cause the stem structure to become more brittle over time which will impact the dynamic movement of the specimen. This particular parasitic fungus would not be too much of a worry the vast majority of the time. However, If you are really concerned, suggest to the client that it may be worth a arboricultural surveyor taking a look at the tree, therefore, you have made a reasonable suggestion which removes much of your responsibility.
  3. I am looking for information, preferably research or scientific papers which relate to the origin of the Root Protection Area calculation (DBHx12=RPA) used in BS5837. I have been told that the mathematical equation is based purely on a 'guess', this may be the case, however, for reference purposes, I'd appreciate it if some could help me out with a source. Cheers

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