Des Moines has provided tens of thousands of free trees to its residents to plant on private property. Nine species are available in 2025.

is a forest insect pest whose main host is Norway spruce trees. The bark beetle and a fungal pathogen have a mutual relationship ... Similar results have been obtained before for broadleaf species ...

It may seem like warm summer days in the shade are a long way off, but when the temperatures are still freezing actually is ...

Belowground litter derived from tree roots has been shown as a principal source ... Roots of these decapitated spruce seedlings were subsequently sampled at four sampling times (2, 4, 10, and 15 ...

Feb. 11, 2025 — Colorado's forests store a massive amount of carbon, but dying trees -- mostly due to insects and disease -- have caused the state's forests to emit more carbon than they ...

To do so using the same old model of monoculture Sitka spruce plantations would be ... An alternative planting system, using a variety of species and age of trees, will see forests stand up ...

Selecting Mount Iškoras in Norway for a search for blue rings, a team of researchers took samples from 25 pine trees and 54 juniper shrubs, representing the species Pinus sylvestris and Juniperus ...

A blue ring formed in 1902 in a tree in northern Norway. Credit: Image by Pawel Matulewski and Liliana Siekacz. Blue growth rings in woody plant stems indicate years when cells failed to lignify ...

For nearly two decades, the tree ... spruce-fir forests in Maine’s colder, higher-elevation regions create unique habitats for Bicknell’s thrush, which Maine added to its endangered species ...

Yeomadon Farm used their England Woodland Creation Offer (EWCO) funding to improve the landscape for business and recreation.