- Game species
- Any species of wildlife or fish that is managed for hunters.
- General forest management area
- Unlike the Forest service, the BLM has two types of matrix lands - general forest and connectivity/diversity blocks. They are allowed to leave less than 15% green tree retentions in the general forest management clear-cuts because they leave larger areas in connectivity/ diversity blocks. (See green tree retention.)
- GIS (geographic information systems)
- GIS is both a database designed to handle geographic data as well as a set of computer operations that can be used to analyze the data. In a sense, GIS can be thought of as a higher order map.
- Green tree retention
- An option 9 standard and guideline, it requires that 15% of a clear cut unit be left intact in mostly aggregate stands (clumped) with a few dispersed trees. For BLM, the green tree retention is specified at 6-8 trees per acre (general forest) or 12 to 18 TPA for Connectivity/Diversity Blocks.
- Ground fire
- A fire that burns along the forest floor and does nor affect trees with thick bark or high crowns. Ground fires do not kill most of the overstory trees, and in general, protect the larger trees from hotter fires.
- Group selection
- A method of tree harvest in which trees are removed periodically in small groups. This silvicultural treatment results in small openings that form mosaics of age class groups in the forest.