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Giant Redwoods and Sequoias (Sequoia National Park)
About the Trees: Redwood (National and State Parks
California)

Redwood National and State Parks (Wikipedia)
Sequoioideae (Wikipedia)

Related

Pages

Terrestrial (Earth)
Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene, Microscope)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism
Plant Flower, Tree
Animal
Invertebrate Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human

Resources

These are organized by a classification scheme developed exclusively for Cosma. More…

General

Portal

Trees are Good (International Society of Arboriculture), Trees Group, Trees Portal (Wikipedia)

Dictionary

tree : a woody perennial plant having a single usually elongate main stem generally with few or no branches on its lower part — Webster

OneLook, Free Dictionary, Wiktionary

Thesaurus

Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords

Encyclopedia

Tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants to compete for sunlight. In looser senses, the taller palms, the tree ferns, bananas and bamboos are also trees. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. — Wikipedia

David Darling’s Internet Encyclopedia of Science, Tree Facts (Trees Group), Encyclopædia Britannica

OneZoom Tree of Life EXplorer
Tree of Life Web Project

System






Science

Arboriculture is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants. The science of arboriculture studies how these plants grow and respond to cultural practices and to their environment. The practice of arboriculture includes cultural techniques such as selection, planting, training, fertilization, pest and pathogen control, pruning, shaping, and removal.

A person who practices or studies arboriculture can be termed an ‘arborist’ or an ‘arboriculturist’. A ‘tree surgeon’ is more typically someone who is trained in the physical maintenance and manipulation of trees and therefore more a part of the arboriculture process rather than an arborist. Risk management, legal issues, and aesthetic considerations have come to play prominent roles in the practice of arboriculture. Businesses often need to hire arboriculturists to complete “tree hazard surveys” and generally manage the trees on-site to fulfill occupational safety and health obligations.

Arboriculture is primarily focused on individual woody plants and trees maintained for permanent landscape and amenity purposes, usually in gardens, parks or other populated settings, by arborists, for the enjoyment, protection, and benefit of people. — Wikipedia

Encyclopædia Britannica

Science





Wood wide web: The underground network of microbes that connects trees—mapped for first time (Gabriel Popkin, Science Magazine)
Do Trees Talk to Each Other? (Richard Grant, Smithsonian Magazine)
The Hidden Life of Trees: What They Feel, How They Communicate (Peter Wohlleben)

Technology



Leafsnap: An Electronic Field Guide

Preservation

The Center for Tree Science: Securing the future of trees (The Morton Arboretum)

History


The History of Arboriculture (Citywide)

Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed in order to analyze atmospheric conditions during different periods in history.

Dendrochronology is useful for determining the timing of events and rates of change in the environment (most prominently climate) and also in works of art and architecture, such as old panel paintings on wood, buildings, etc. It is also used in radiocarbon dating to calibrate radiocarbon ages.

New growth in trees occurs in a layer of cells near the bark. A tree’s growth rate changes in a predictable pattern throughout the year in response to seasonal climate changes, resulting in visible growth rings. Each ring marks a complete cycle of seasons, or one year, in the tree’s life. As of 2013, the oldest tree-ring measurements in the Northern Hemisphere are a floating sequence extending from about 12,580 to 13,900 years. — Wikipedia

Encyclopædia Britannica


The Tree-Ring Society
Tree-Ring Basics (Rocky Mountain Tree-Ring Research)
Tree-Ring Resources (Rocky Mountain Tree-Ring Research)
Bristlecone Pine Dendrochronology (Leonard Miller)
Dendrochronology Resources (Laboratory of Tree-Ring Research, University of Arizona)




Pando is the name of the largest organism on Earth, and one of the oldest (Pando Populus)
Pando (Wikipedia)
Quaking aspen (Wikipedia)

One of the world’s largest organisms is shrinking (David Shultz, Science Magazine)
The Biggest Organism on Earth Is Dying, and It’s Our Fault (Yessenia Funes, Gizmodo)

Quotation

Tree Quotes (Trees Group), Quotations Page

Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

Participation

Education

Educational Activities about Trees (Trees are Good)

Course



Crash Course Biology (YouTube Playlist)

OER Commons: Open Educational Resources

Community

Occupation

Arborist (Trees are Good)

Organization

International Society of Arboriculture

News

Science Daily, Phys.org, NPR Archives

Book

ISBNdb

Government

Document

USA.gov

Expression


Fun


Tree Jokes (Trees Group)

Adventure


Freespirit Spheres (Vancover Island, Canada)

Out’n’About Treehouses Treesort (Takilma, Oregon)
Azulik Resort (Tulum, Mexico)
Treehouse Lodge Resort (Iquitos, Peru)

Mystery

Note: This is a 360° Video — press and hold to explore it!


There’s a Forest in Poland Filled With Crooked Trees, And No One Can Explain Why (Jack Sommer, Science Alert)
Crooked Forest (Wikipedia)

Arts



Tree Hugger Project (Agnieszka Gradzik & Wiktor Szostalo)
Tree Hugger Project (Agnieszka Gradzik, Wikipedia)

Poem

Tree Poems (Trees Group), OEDILF: The Omnificent English Dictionary In Limerick Form

Music

Tree Music (Trees Group), Song Lyrics

Fiction



Ents (Tolkien Gateway)



Tree of Souls (Avatar Wiki)

Folklore and Myth


returntotop

More…

Trees News -- ScienceDaily Read all about trees, including the latest research on many tree species, insect infestations, and the role of trees in ecology. Full articles, photos, free.

  • Source of pathogen that causes bitter rot disease
    on August 14, 2020 at 5:10 pm

    Fungal spores responsible for bitter rot disease, a common and devastating infection in fruit, do not encounter their host plants by chance. Turns out, they have a symbiotic association with the plant, often living inside its leaves. The new way of looking at the fungal pathogen, Colletotrichum fioriniae, as a leaf endophyte -- bacterial or fungal microorganisms that colonize healthy plant tissue -- was the outcome of a two-year study.

  • Most close relatives of birds neared the...
    on August 11, 2020 at 4:02 pm

    New research has resulted in an updated evolutionary tree of early birds and their closest relatives to reconstruct powered flight potential, showing it evolved at least three times. Many ancestors of the closest bird relatives neared the thresholds of powered flight potential, suggesting broad experimentation with wing-assisted locomotion before flight evolved.

  • Forest growth in drier climates will be impacted...
    on August 10, 2020 at 6:09 pm

    A new study suggests that future reductions in seasonal snowpack as a result of climate change may negatively influence forest growth in semi-arid climates, but less so in wetter climates.

  • Fragmented forests: Tree cover, urban sprawl both...
    on August 10, 2020 at 2:32 pm

    The extent of Southeast Michigan's tree canopy and its urban sprawl both increased between 1985 and 2015, according to a new study that used aerial photos and satellite images to map individual buildings and small patches of street trees.

  • Study clarifies kinship of important plant group
    on August 5, 2020 at 3:01 pm

    Asterids comprise around 100,000 flowering plants, from heather to tomatoes. Up to now, their family relationships had not yet been fully clarified. A new study has now somewhat closed this knowledge gap. It is the world's most detailed phylogenetic analysis ever conducted for asterids.


Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • How climate change is affecting gardens
    on January 29, 2020 at 1:01 pm

    According to Dr. Dave Kendal from the University of Tasmania, in the next 50 years, 20-50% of current plant species in botanic gardens and urban landscapes will likely confront temperatures those species have never experienced before.

  • Oaks instead of palm trees? Florida's iconic...
    on November 22, 2019 at 5:30 pm

    South Florida's palm trees are postcard promises of sighing sea breezes and sandy beaches, but the icon of the tropics may be an impractical adornment in an era of climate change.

  • The overlooked third man
    on April 20, 2015 at 1:50 pm

    The horticulturist who came up with the concept of 'evolution by natural selection' 27 years before Charles Darwin did should be more widely acknowledged for his contribution, states a new paper by a King's College London geneticist.

  • How ancient species survived or died off in their...
    on April 16, 2015 at 7:31 pm

    "The answers to extinction, survival and evolution are right here in the dirt," says University of Cincinnati Quaternary science researcher Ken Tankersley, associate professor of anthropology and geology. "And we are continually surprised by what we find."

  • A thousand years of environmental change in...
    on November 14, 2014 at 11:00 am

    Environmental change is nothing new in Polynesia. For centuries, the inhabitants of the volcanic, sea-battered islands have been employing a variety of strategies to adapt to their changing landscapes.