Article View: ca.environment
Article #243Re: Safety of Mature Trees Alert
From: Geoff Dellow
Date: Wed, 09 Oct 1996 00:00
Date: Wed, 09 Oct 1996 00:00
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Update We have obtained the recent publication of the DoE - a manual �The Body Language of Trees�obtainable from HMSO -the government stationery sales office - which shows concern over the loss of �amenity trees�. It is translated from the German and written by Prof.Klaus Matheck of Karlsruhe University. It is the amenity value of the Rusland Beeches that appeals to the general public and has been largely ignored by the Lake District National Park Authority who have looked at the issue as though these are trees in a Forestry Plantation which is not suprising as many menbers of the LDNPA board represent large landowners in the Lake District. The DoE obviously are concerned about this issue as evidenced by the forward to this book which is given later. *It is most likely that their views are substantially in disagreement with those expressed by Derek Patch, Director of the AAIS.* **Note : - Fairly long article in Monday 7/10/96 Independent Newspaper - page 5 - on the Rusland Beeches which discusses the presence of unusual bats that also have protection orders. These inhabit the most dangerous trees (those with the most rotten wood) and could help protect the Beeches from the axe. Also photo taken with fish eye lens which looks to me as though the trees are falling inwards and hence a bit decrepit ! ! Quote from the preface �Body language of trees� published by DoE The Department of the Environment is grateful to Claus Mattheck, Hedge Breloer and the Karlsruhe Research Centre for their co-operation in the production of this new English edition of the author�s book �Handbuch der Schadenskunde von Baumen�. By providing a scientific basis for defining the various types of defect that can occur in trees, this book should help all those concerned with the care and management of amenity trees towards more soundly based judgments and decisions. It is fitting, therefore, that it should be published in the Department�s series �Research for Amenity Trees� which aims to promote high standards of amenity tree care by ensuring that research results are readily available to practitioners. This book is a companion volume to �Diagnosis of Ill Health in Trees�(number 2 in the series) and to a further manual, being produced for the Department by the Forestry Commission, which addresses the assessment and management of hazardous trees *************** TIMING AND THE REST OF THE STORY Claus Mattheck and Hedge Breloer have published their book on the failure analysis of trees at the perfect time. During the last decade, concerns over hazard trees have been increasing greatly. Information on tree biology and tree care also has been increasing greatly over the last few decades. Missing during these times was the rest of the story, a look at the tree from the view of its mechanical design. TREES ARE UNIQUE ORGANISMS Trees are the tallest free-standing organisms in the world. Trees live longer, and become more massive than any other organism ever to live on earth. How do they do it? Trees bring together a unique biological system that compartmentalizes infections and a structural form that resists heavy loading. LIMITS TO ALL SYSTEMS Yes, the trees are big and tough. Yet they do have their limits for maintaining the biological integrity and structural integrity of all their parts. Insects and diseases do injure and kill trees. Branches do break. Trunks do split. And roots do release their grip on the soil. When loading increase beyond the intrinsic strength of any structure, failure of the structure is inevitable. Or when one portion of the structure is weakened, that weakened portion then will be the new position where failure is most likely to occur after heavy loading. Trees have branches that sway in the wind and bend when loaded with ice and snow. The branch is well designed for swaying to the sides and bending downward. But bending or swaying upward often brings on serious problems - internal cracks. CRACKS THE BEGINNING OF SERIOUS PROBLEMS Trees have �learned� to deal with wounds and with rot very effectively. After wounding, microorganisms usually infect and invade the newly exposed wood. The tree responds against the forces of invasion by �building walls� - chemical and structural - that compartmentalise the infection. The ability to compartmentalise infections effectively is under moderate to strong genetic control. In article <AE774B0C9668B0E59@tygh.demon.co.uk>, geoff@tygh.demon.co.uk (Geoff Dellow) wrote: >The Board decided to clear fell all the Beeches at their meeting today. <snip> >We are very disappointed with the decision and can only feel that the board >are out of touch with the general public and will have to take the >consequences from them for their actions. We suspect that the whole >creditability of the National Park will suffer dramatically. I believe that >this must be a warning world wide to all those that value mature trees to >be on the look out to protect them as there could be very few to be found >in as little as ten years and then we will ring our hands about the >terrible decisions that were made at the turn of the century by people that >should have been replaced by more sensitive people in touch with the >public. > >> >>If this decision goes ahead it will send shock waves all over Britain, and >>possiblythe world to those that have mature trees overhanging either roads >>or public footpaths with a right of way. It will say that similar action >>of felling apparently safe beautiful trees is not only permissible but >>desirable if there is the remotest chance of the public being injured as >>they travel or move close to them . A study of this area of Risk Analysis >>is urgently needed. >> >>The LDNPA plan to take this extraordinary step to fell all of these >>magnificent beeches which run alongside a country lane because they >>believe that they are or will soon become unsafe. This is a complete >>contradiction to their role as protectors of the environment and comes >>about because they became the owners of the land that they acquired form >>the Archibald Family in order to take care of them. Thus they are both >>judge and applicant in this unusual case. Apologies for previous posting which went out unintentially. The present stage of the campaign focusses on the Department of the Environment who must allow the lifting of the tree preservation orders
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X-Google-Language: ENGLISH,ASCII X-Google-Thread: 100c63,bb6e06af8dc18337 X-Google-Attributes: gid100c63,public X-Google-Thread: fdaee,bb6e06af8dc18337 X-Google-Attributes: gidfdaee,public X-Google-Thread: fdaed,967a75a84ec59ced X-Google-Attributes: gidfdaed,public X-Google-Thread: 10df74,967a75a84ec59ced X-Google-Attributes: gid10df74,public X-Google-Thread: 105eab,967a75a84ec59ced X-Google-Attributes: gid105eab,public X-Google-Thread: f767f,da097d35eab3a062 X-Google-Attributes: gidf767f,public X-Google-Thread: fd92c,967a75a84ec59ced X-Google-Attributes: gidfd92c,public From: geoff@tygh.demon.co.uk (Geoff Dellow) Subject: Re: Safety of Mature Trees Alert Date: 1996/10/09 Message-ID: <AE810ED696689FE5@tygh.demon.co.uk> X-Deja-AN: 188205044 x-nntp-posting-host: tygh.demon.co.uk references: <AE4552E9966813DCE@tygh.demon.co.uk> <AE4BDCE89668FA727@tygh.demon.co.uk> <AE4F2C349668193DA2@tygh.demon.co.uk> <AE63F4C1966815C49@tygh.demon.co.uk> <AE774B0C9668B0E59@tygh.demon.co.uk> newsgroups: ca.environment,pa.environment,scot.environment,uk.environment,uk.politics.environment,nz.soc.green,aus.environment.conservation