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40% of Beijing to be covered by forests - China.org.cn

40% of Beijing to be covered by forests - China.org.cn | Forest Keepers Tree news | Scoop.it

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The World's Oldest Living Olive Trees Are Lebanese

The World's Oldest Living Olive Trees Are Lebanese | Forest Keepers Tree news | Scoop.it
“Sisters” or the the Olive trees of Noah, are the 16 oldest olive trees in the world found in the community of Bechealeh, Lebanon. Some 6,000 years old, folklorists say these have Bibli...

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American Grove's curator insight, January 10, 2013 10:19 AM

Great information and photos!

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Volunteers to plant 200 trees at White Rock Lake - Dallas Morning News

Volunteers to plant 200 trees at White Rock Lake - Dallas Morning News | Forest Keepers Tree news | Scoop.it
Dallas Morning News
Volunteers to plant 200 trees at White Rock Lake
Dallas Morning News
City forester Karen Woodard, at T&P Hill on White Rock Lake, says saplings are needed to replace trees that are nearing the end of their life spans.
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Not all fungi are bad for trees

Not all fungi are bad for trees | Forest Keepers Tree news | Scoop.it
Country diary: Stansted Park, Hampshire: Fly agaric is the quintessential fairytale toadstool, a home for woodland sprites

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TREE KILLER ON THE MOVE: The Emerald Ash Borer wings its way to Bucks ... - Bucks Local News

TREE KILLER ON THE MOVE: The Emerald Ash Borer wings its way to Bucks ... - Bucks Local News | Forest Keepers Tree news | Scoop.it

As part of a national survey, Pennsylvania Department of Agriculture Emerald Ash Borer crews began hanging more than 750 triangular purple...


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I am Planting a Free Tree to Save on Utility Bills - Get Yours

I am Planting a Free Tree to Save on Utility Bills - Get Yours | Forest Keepers Tree news | Scoop.it
The Arbor Day Foundation and utility companies are providing trees to help reduce energy use. A limited number of 2' to 4' trees are available for Free. The Free trees are going fast - check today to see if your utility is participating.
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Benefits of Urban Forests

This video highlights the variety of benefits that urban forests provide to their city residents. We intend for this video to serve as an education tool to h...

 


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New strategy needed to fight Dutch elm disease in Winnipeg - CBC.ca

New strategy needed to fight Dutch elm disease in Winnipeg - CBC.ca | Forest Keepers Tree news | Scoop.it
CBC.caNew strategy needed to fight Dutch elm disease in WinnipegCBC.caThe report recommends Winnipeg come up with a new strategy for battling the disease — a strategy that includes asking the province to split the $1.9 million cost of planting new...

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GIS and Ancient Trees Reveal Past Temperatures and Climate Change | ArcNews

GIS and Ancient Trees Reveal Past Temperatures and Climate Change | ArcNews | Forest Keepers Tree news | Scoop.it
Dendrochronologists use ArcGIS Spatial Analyst to map and analyze the temperature record in bristlecone pine trees rings to track climate change.

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American Grove's curator insight, February 26, 2013 11:47 AM

Great article on dendrochronology and the bristlecones!

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Nature Blows My Mind! This 80,000-Year-Old Aspen Grove Clones Itself

Nature Blows My Mind! This 80,000-Year-Old Aspen Grove Clones Itself | Forest Keepers Tree news | Scoop.it
Not only is this organism one of the oldest on Earth, it is also a contender for other extreme titles. (RT @m_m_campbell: #SixIncredibleThingsBeforeBreakfast: Clone alone. 80k yr old aspen grove is one clone.

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Christian Allié's curator insight, January 10, 2014 9:50 AM

....""""""""""........

 

....  The grove is called Pando, which is Latin for "I spread" -- and spread it does. The grove is actually a single clonal colony of a male Quaking Aspen. Simply put, it is essentially one massive root system that began life an estimated 80,000 years ago. The root system currently has somewhere around 47,000 stems that create the grove of trees that keep the root system going.

 

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.......

un tour d’horizon de quelques arbres parmi les plus vieux. La mesure de l’âge des arbres se fait  le plus souvent par dendrochronologie ou par datation par le carbone 14. Attention, les arbres les vieux ne sont pas les plus grands ou les plus gros, loin s’en faut.

Vous pourrez le constater en consultant : Les arbres les plus grands et gros du Monde.


http://www.regardsurlemonde.fr/blog/les-arbres-les-plus-vieux-du-monde

 

................................................................................................................................................. Lomatia tasmanica, Houx Royal de Tasmanie;  Chaque plant peut vivre 300 ans, mais le clone existe depuis au moins 43 600 ans (peut-être 135 000 ans).

http://fr.wikipedia.org/wiki/Lomatia_tasmanica

 

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.......Francis Hallé:

.........  Les plantes ne sont pas programmées génétiquement pour mourir ?


Non, leur fin est toujours due à des éléments externes : une inondation, un coup de froid, un bûcheron, un incendie... Mais si tout va bien, il n'y a aucune raison pour qu'elles disparaissent. Chez les animaux et les hommes, les gènes s'éteignent par un mécanisme biochimique - la méthylation – qui est à l'origine de la sénescence – le vieillissement. Certains arbres et plantes paraissent échapper à ce processus : avec leur « croissance rythmique » – stoppée en hiver –, ils réactivent leurs gènes « éteints » à compter du printemps, et luttent ainsi contre la sénescence. En outre, à partir d'un arbre originel mort depuis longtemps, des « clones » se forment grâce à des mécanismes de multiplication végétative au niveau du sol, ce qui leur donne une durée de vie illimitée. Il suffit d'aller dans la banlieue de Londres, au jardin botanique de Kew Garden, pour voir une collection d'arbres potentiellement immortels. Les chênes y vivent éloignés les uns des autres au milieu d'immenses pelouses. Leurs branches basses traînent par terre et s'enracinent pour donner de nouveaux arbres, qui à leur tour en donnent d'autres. Si les conditions restent bonnes, pourquoi voulez-vous que ça s'arrête ? Le plus vieil arbre que l'on ait identifié pour l'instant, le houx royal de Tasmanie, a 43 000 ans. Sa graine initiale aurait germé au Pléistocène, au moment de la coexistence entre Neandertal et l'homme moderne. Le premier arbre sorti de la graine est mort depuis longtemps, mais la plante, elle, ne meurt pas, plusieurs centaines de troncs se succèdent sur 1 200 mètres..

.........http://www.telerama.fr/monde/francis-halle-les-arbres-peuvent-etre-immortels-et-ca-fait-peur,34762.php

 

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Flickr: Trees eating things

Flickr: Trees eating things | Forest Keepers Tree news | Scoop.it

A series of photos that "eat" objects in their way.


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The Healing Power of Pine

The Healing Power of Pine | Forest Keepers Tree news | Scoop.it
The smell of freshly-cut pine trees fills the air with seasonal joy. But evergreen trees are also loaded with compounds that have a variety of positive effects on the human body.

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Dying aspen trees sound alarm for world's forests

Dying aspen trees sound alarm for world's forests | Forest Keepers Tree news | Scoop.it
A severe drought in the US 10 years ago weakened the region's aspen trees.

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Giant Sequoias Grow Faster With Age - National Geographic

Giant Sequoias Grow Faster With Age - National Geographic | Forest Keepers Tree news | Scoop.it
National GeographicGiant Sequoias Grow Faster With AgeNational GeographicAging giant sequoia trees are growing faster than ever, with some of the oldest and tallest trees producing more wood, on average, in old age than they did when they were...
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'Ash dieback and insects could ravage our forests but they will rise again' - The Guardian

'Ash dieback and insects could ravage our forests but they will rise again' - The Guardian | Forest Keepers Tree news | Scoop.it
The Guardian'Ash dieback and insects could ravage our forests but they will rise again'The GuardianAn even purer way to produce a woodland or a forest is to just fence off the relevant area of land and let nature take its course.

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Partners in Community Forestry National ... - American Forests

Partners in Community Forestry National ... - American Forests | Forest Keepers Tree news | Scoop.it
Last week, I attended the 2012 Partners in Community Forestry National Conference in Sacramento, Calif. ...

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