Topics: Oxford Tree-Ring Labratory - Dendrochronology

TD Tree Bee is a tree identification tool used to engage classrooms, families and communities in learning more about the trees and forests in their own backyards.

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Great Basin Bristlecone pines (Pinus longaeva) are remarkable for their great age and their ability to survive adverse growing conditions. In fact, it.

TD Tree Bee is a tree identification tool used to engage classrooms, families and communities in learning more about the trees and forests in their own backyards.

This Bur Oak has acted as a canopy and playground at Centerville’s Public School for generations. In fact it is visible in a 1912 photograph of the former Chesterville High School that once sat at the south side of the school property on College Street.
Dating back to pre-confederation, this tree has survived growing up in what was once a prominent mill town and has withstood massive redevelopments, ice storms, and Tornados. The tree is a symbol for the school and is featured on the school’s logo, representing growth as well as preserving the community’s unique history and culture.

The nomination of this tree brought together community members, sharing their historic tales and pictures of the iconic species. Representatives of Chesterville were inspired to nominate this tree in order to preserve the significance in plays within the community. A testament to the tree’s significance in the community, everyone in town knows the revered “Oak Tree”.

The Principle of Cognitive Classification
The Principle of Crossdating
The Prinicple of Trees as Dynamic Entities
The Principle of Plurality and Parsimony
The Principle of Aggregate Tree Growth
The Principle of Limiting Factors
The Principle of Replication across Spatiotemporal Scales
The Principle of Site Selection

The science that uses tree rings to date when timber was felled, transported, processed, or used for construction or wooden artifacts. Example: dating the tree rings of a beam from a ruin in the American Southwest to determine when it was built.

The science that uses tree rings to study present climate and reconstruct past climate. Example: analyzing ring widths of trees to determine how much rainfall fell per year long before weather records were kept.

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TD Tree Bee is a tree identification tool used to engage classrooms, families and communities in learning more about the trees and forests in their own backyards.

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Please remember that everything in a national park is protected. Some bristlecone pine wood on the ground may be thousands of years old and important scientifically. Please leave all down bristlecone pine wood in place.

For many years the spruce tree has been regarded as a relative newcomer in the Swedish mountain region. "Our results have shown the complete opposite, that the spruce is one of the oldest known trees in the mountain range," says Leif Kullman, Professor of Physical Geography at Umeå University.

A fascinating discovery was made under the crown of a spruce in Fulu Mountain in Dalarna. Scientists found four "generations" of spruce remains in the form of cones and wood produced from the highest grounds.

The discovery showed trees of 375, 5,660, 9,000 and 9,550 years old and everything displayed clear signs that they have the same genetic makeup as the trees above them. Since spruce trees can multiply with root penetrating braches, they can produce exact copies, or clones.

This should cover most of the things you need to know. Brass: A very sharp edge to the sound and very rich with mellow overtones. Steel: A step more towards bright with a very pronounced ring, allot of body and longer decay than brass. Aluminum: Clear, open sounds with bright, crisp overtones and is capable of incredibly loud rimshots. Bronze: A close cousin to brass with the overall character of woods, can be loud, a good all around drum. Copper: A close cousin to the Aluminum drum only slightly warmer. Hammered: Same overall characteristics as the parent material, only slightly less resonance to varying degrees. Metal Thickness: The 1mm shells are not as low to mid range resonant as thicker shells such as 3mm plus. Metal Cast Drums: Very Loud and Resonant due to special cymbal alloys used in the casting process. Wood Drums: see below. Maple: Maple is a general overall warm sounding product, it can reproduce frequencies of the drum fairly well across the spectrum. True slow growth old forest maple trees are most prized due to the narrow growth rings and straight grain. The wood resonates extremely well and the finishes are well accepted. Newer and reforested trees do not have as tight a growth ring habit and are not as prized as old growth timber. Solid shelled snare drums made of burled or Birdseye maple are very warm in overall tone but also impart a very bright attack. Maple is generally thought to have very even tone across the spectrum and is prized by many drummers. Mahogany: True mahogany from USA or Honduras will have about a 20% increase in low frequency resonance over the maple drum, mid and high frequencies will be the same from a reproduction point of view, but because the Mahogany has the 20% low end increase, the perceived tone is warmer. Certain deep red timbers from South East Asia are sold as a Mahogany , or Mahogany Finish although they are not true Mahogany from USA or Honduras. It’s most likely called mahogany due either its common appearance (dark red) or due to the nature of the forestation being depleted and the stigma attached to it. Asian Philippine Mahogany is often sourced from the endangered Dipterocarp forests of Indonesia, Malaysia and the Philippines. Dependant on the source tree the timber types are often known as Meranti, Lauan and Keruing. Hence the name Philippine mahogany. The species known as Khaya Nyasica or African mahogany are more plentiful yet still endangered and therefore, not plentiful at this time. Birch: Birch is a very dense tough wood, blond in color that tools well. It will have about a 10% loss in reproduction of low end compared to Maple and about a 20% increase in the high end, with the mid range remaining about the same, so the Birch kit will definitely be a “harder” and “brighter” sounding kit. Birch is derived from fast growth trees that are commonly large in diameter and finish reasonably well. Birch is often referred to as a naturally “EQ’d” drum set. This came from its popularity when used in recording studios where the attack portion of the sound was an important ingredient in recordings dating back to the late 60’s. It made it easier to get the drums to cut through the mix with minimal effort. Poplar: Poplar is derived from fast growing straight medium hardwood trees and is a less expensive alternative to Birch and Maple. Its finish can be somewhat green in color and is therefore used in the inner ply layers as substitute for more expensive and less plentiful woods. To my ear it takes on more of the tone of birch or mahogany than maple. Basswood: Basswood is a great less expensive hardwood that mimics the sound of Maple to some, mahogany to others. Yet it is more plentiful and gives the manufacturer a price advantage. It in many ways is an upgrade to luaan, or ramin and is often used as a core wood with a bit more of the lower register tone to it than realized out of maple. For this reason I tend to think of it more like mahogany than maple. Small Diameter: Means higher pitch. Longer Length: Means more power and shell resonance, longer decay. Shallow Depth: Means more articulate, less power due to decreased shell area. Snare Bed: A slight depression in the resonant side bearing edge to allow the snare to ride closer to the head. Bearing Edges: Less than 45° are not inferior, they simply make for a different sound, usually less resonant and darker in character the less the angle, 35° is popular on Birch Drums. Drums get brighter if the crown of the bearing edge is a tighter radius (sharper) than if the radius is flatter (may be desired on the toms and kick).