Another recent study, of a site in the central Sierra Nevada, found nine times as many dead standing trees
and three times as many dead logs on the ground than were recorded in 1929.
This species infests vigorous trees, and can evolve on dead standing trees
The USDA FIA program has also undertaken a statewide assessment of above-ground biomass (including live and dead standing trees
, the understory/shrub layer, down dead wood) and below-ground biomass (including live tree roots and soil organic matter) to estimate forest carbon stocks (Crocker et al.
They both used the Forest Service's definition based on the number, age and density of large trees per acre, the characteristics of the forest canopy, the number of dead standing trees
and fallen logs and other criteria.
Halter, the latest research shows: -- There are currently a million dead standing trees
within the San Bernadino Mountains alone, all killed by bark beetles and a historic drought.
Watch out for dead overhanging limbs, dead standing trees
, cold sumps, swampy ground, and insect hives.
The pockets of live trees, as well as the dead standing trees
remaining after fire, form what ecologists call "biological legacies," seed banks and soil anchors that aid fire recovery.
If we want to enhance biodiversity in monoculture forests we can retain features like dead standing trees
, coarse woody debris, patches of shrubs, a small percentage of other tree species that naturally re-generate and so on.
Fish and Wildlife Service before chopping down any dead standing trees
in areas where the endangered birds live.
The definition contains various criteria for determining whether a forest qualifies as ecological old-growth: It must have a given number of large trees per acre, a certain amount of crown closure, a multilayered canopy, a number of dead standing trees
or snags, and down logs.