Australia’s forests and forestry glossary

The process by which salinity levels increase, such as in soils and streams when saline groundwater rises towards the surface following the clearing of forested land for use as farm land.

The amount of salt in water or soil.

The harvest of trees that are dead or dying as a result of insect attack, disease, drought, fire or other factors.

See Harvesting.

A native tree (e.g. Santalum spicatum, S. lanceolatum) or exotic tree (e.g. S. album) in the family Santalaceae, which yields fragrant timber and oil.

A young tree beginning to develop branches and increase in height.

A tropical or subtropical, woodland/grassland ecosystem in which trees are sufficiently widely spaced that adjacent tree crowns are not in contact. Typically, rainfall is seasonal, and dry-season fires are frequent.

In the National Forest Inventory, areas of savanna where crown cover reaches or exceeds 20% are classified as woodland forest, whereas areas of savanna where crown cover does not reach 20% are classified as non-forest (and, more specifically, as 'Sparse woody vegetation'). 

See Crown cover, Forest, National Forest Inventory, Sparse woody vegetation, Woodland forest.

Log used to manufacture sawn timber. High-quality sawlogs are sawlogs meeting specified size and grade specifications (including the amount of permissible defect). Low-quality sawlogs are sawlogs not meeting high-quality sawlog specifications.

See Sawn timber.

A wood-processing facility in which logs are sawn by specialised machinery into timber such as boards.

See Sawlog.

Timber produced by sawing logs into particular sizes. Also known as sawnwood.

A description of plants or vegetation that have leaves that are tough, hard or short, such as eucalypts and acacias, and are adapted to dry or nutrient-poor conditions.

See Dry forest/dry sclerophyll forest, Wet forest/wet sclerophyll forest.

A stand of trees planted and managed specifically for the production of genetically superior seeds.

A tree left standing in a harvested area for the purpose of providing seed for natural regeneration.

See Regeneration, Seed-tree silviculture.

A native forest silvicultural system in which trees are retained in a harvested area to provide seed for natural regeneration.

See Harvesting, Regeneration, Seed tree, Silvicultural system.

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A young tree growing from a seed, before it begins to grow branches, increase in height, and become a sapling.

See Sapling.

A native forest silvicultural system in which trees (typically those of a specified size or growth stage) are removed singly or in groups, while other trees (such as regrowth, saplings, pole stems or habitat trees) are retained. Generally used in uneven-aged stands.

See Group selection, Harvesting, Sapling, Silvicultural system, Single-tree/small group selection, Uneven-aged forest.

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1. A native forest growth stage older than mature, when irregular crowns form (sometimes referred to as ‘over-mature’).

2. A native forest growth stage at various ages after 80 years since disturbance. One of four growth stages used at the national level to describe the age of trees and stands of trees.

See Disturbance, Growth stage, Mature, Regeneration, Regrowth.

See Sustainable forest management (SFM).

A native forest silvicultural system of securing natural tree regeneration under a partially harvested overstorey, which is subsequently removed by subsequent harvest(s) to allow seedlings and young regeneration to occupy the site.

See Harvesting, Overstorey, Regeneration, Seedling, Silvicultural system.

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A non-forest vegetation type dominated by woody plants that are single-stemmed or multi-stemmed. Shrubland above 2 metres tall and containing a tree component can also be classified as ‘Sparse woody vegetation’.

See Heathland, Sparse woody vegetation.

Deposition of silt (fine soil and mineral matter), usually related to the degradation of watercourses due to soil erosion.

A method used in managing forest establishment, composition, growth, harvesting and regeneration.

Also known as a silvicultural practice. 

See Aggregated retention, Clearfelling, Group selection, Harvesting, Regeneration, Seed-tree silviculture, Selection harvesting, Shelterwood, Silviculture, Single tree/small group selection, Variable retention.

The art, science and technology of managing forests to achieve specified forest management objectives.

A native forest silvicultural system in which single trees or small groups of trees of various ages are harvested. This method is suitable for promoting regeneration of shade-tolerant species, or growth of preferred species or individual trees.

See Harvesting, Regeneration, Selection harvesting, Silvicultural system.

Shallow soils, usually on ridges or steep slopes.

Tree debris (e.g. branches, bark) left on site following harvesting events.

See Harvesting.

A track along which logs are pulled (snigged) or conveyed from the place where the tree is felled to a nearby log landing or point of loading; also known as an extraction track.

See Log landing.

Wood or wood products from conifers, irrespective of the physical softness of the wood.

Also refers to trees that have such wood, and plantations of such trees.

See Conifer, Hardwood.

A reduction in soil volume without loss of soil, leading to poor soil aeration, reduced drainage, and impeded root development.

Lowering the current and/or future capacity of the soil to support existing forest vegetation and ecosystems.

The susceptibility of soil to erosion as a result of soil properties.

The susceptibility of soil to erosion, combining soil properties, site and climate factors, and management practices. Site factors can include slope, aspect, vegetation and drainage.

The spatial distribution and annual variation in water availability in a soil profile.

A non-forest vegetation type of open woodland, heathland or shrubland, generally containing a tree component with actual or potential tree height greater than 2 metres, but either tree crown cover of 5-20%, or cover of trees less than 5% but combined cover shrubs and trees greater than 10%.

Previously known as 'Other woody vegetation'.

See Crown cover, Heathland, Shrubland.

1. A taxonomic rank underneath genus.

2. A biological classification comprising related organisms that share similar characteristics derived from a common gene pool, and that breed to produce fertile offspring.

See Genus, Subspecies, Taxon.

The variety of species in an ecosystem.

See Biodiversity, Ecosystem diversity, Genetic diversity.

A commercial satellite with a high-resolution geometric multi-spectral scanning radiometer providing optical imaging information of the Earth’s entire surface. SPOT data provide information on vegetation cover and vegetation change (e.g. after fire).

A contiguous area within a forest that contains a cohort of trees that have a common set of characteristics. Normally a stand will be described or managed as a single unit.

The volume (excluding branches) above stump height of living or dead standing trees above a certain size in an area of forest at a given time. Differs from growing stock in including standing dead trees.

General term for public forest managed by state governments for multiple purposes, including the production and harvesting of wood. Most State forest is included in the National Forest Inventory tenure class ‘Multiple-use public forest’.

See Multiple-use public forest, National Forest Inventory, Publicly managed forest.

The density of an area of a forest stand measured as the number of trees, tree basal area or wood volume per unit area, or as the proportion of crown closure. Can apply to stocking of retained trees after harvesting, or to the adequacy of seedling regeneration or planted stock.

See Basal area, Harvesting, Regeneration, Stand.

The price that a private firm pays a landowner for the right to harvest wood from that land.

See Royalties.

A taxonomically recognised subdivision of a species.

See Species, Taxon.

Forests found in regions located between tropical and temperate zones.

See Boreal forest, Temperate forest, Tropical forest.

Development that meets current needs without compromising the ability of future generations to meet their own needs.

1. A set of objectives, activities and outcomes consistent with maintaining or improving a forest’s ecological integrity and contributing to people’s wellbeing now and in the future.

2. The practice of stewardship and use of forests and forest lands in such a way, and at a rate, that maintains their biodiversity, productivity, regeneration capacity and vitality, and their potential to fulfil, now and in the future, relevant ecological, economic and social functions at local, national and global levels, and that does not cause damage to other ecosystems.

See Ecologically sustainable forest management (ESFM), Ecosystem, Productivity, Regeneration.

The yield of products (e.g. wood, water) from an area of forest that ensures that the functioning of the forest ecosystem as a whole is maintained and the flow of products can continue indefinitely under a given management strategy and suite of sustainable-use objectives.

See Ecosystem.

In regards to wood, the yield that a forest area can produce continuously at a given intensity of management without impairment of the productivity of the land for a given period of time.

See Productivity.