System All trees in a small patch are felled, with the gaps created scattered over the forest compartment. Gap size is no more than about two tree-heights in diameter, so that natural (or induced) seedfall from surrounding trees can be used. An uneven-aged system, as the fellings are done every 10-15 years. Forestry Victoria
A process of selecting groups of trees for harvest in order to open the forest canopy and encourage the reproduction of mixed age stands
Selection for traits that would be beneficial to a population at the expense of the individual possessing the trait.
Trees are periodically removed in small groups (1) ABITAT MANAGEMENT: management of the forest to create environments which provide habitats (food, shelter) to meet the needs of particular organisms (2)
a process of harvesting patches of trees to open the forest canopy and encourage the reproduction of unevenaged stands.
A forest regeneration technique where small patches (less than 2.5 acres) are cleared and regenerated by natural seeding or planting.
A model of evolution. Some researchers believe that natural selection can favor traits benefiting groups to the disadvantage of individuals. Selection at the group level is expected to be weaker than selection at the individual level because groups do not reproduce as quickly as individuals and because group altruism can not resist the introduction of "selfish individuals." Do not confuse group selection with kin selection.
An uneven-aged cutting method in which small groups of trees, usually no more than two acres in size, are removed to meet a predetermined goal of size distribution and tree species in the remaining stand.
an uneven-aged silvicultural system; trees are removed in small groups, here and there, from a large area each year; regeneration is mainly natural and the stand is ideally composed of many ages.
a method of regenerating uneven-aged stands of trees by removing/harvesting trees in small groups or patches (usually less than 1/2 acre). Group selection typically encourages the reproduction of tree species that are somewhat to moderately tolerant of shade.
A method of harvesting timber wherein a designated group(s) of trees is removed. Groups may be determined by size, age, species, or other defined criteria.
See Selection silvicultural system.
trees are removed and new age classes are established in small groups
a process of harvesting patches of trees to open the forest canopy and encourage reproduction of uneven-aged stands.
An uneven-aged system in which trees are removed in small groups. Habitat - The abode, natural or otherwise, of a plant or animal, considered particularly in relation to all the environmental influences affecting it.
Technique used in uneven-aged timber management that selects groups of trees for harvesting within a stand.
(1) The removal of small groups of trees to regenerate shade-intolerant trees in the opening (usually at least 1/4 acre). (2) A specific type of selective cutting.
A group selection is simply a selection by group, enabling you to select multiple values at the same time, the only condition for this selection is that they are all in the same group.
In evolutionary biology, group selection refers to the idea that alleles can become fixed or spread in a population because of the benefits they bestow on groups, regardless of the fitness of individuals within that group.