Term
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Definition
| pertaining to the nonliving parts of an ecosystem, such as soil particles, bedrock, air, water |
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Term
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Definition
| a disease resulting from nonliving agents, such as temperature or air pollution |
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Term
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Definition
| the combined processes, e.g. sublimation, melting, and evaporation, that remove snow or ice from the surface of a glacier, snowfield, etc. |
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Term
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Definition
| the loose, relatively permeable material, either contained within or accumulated on the surface of a glacier deposited during the downwasting of nearly static glacial ice |
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Term
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Definition
| a hand-held instrument used to determine slopes, elevations, and heights |
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Term
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Definition
| the accuracy of a map in relationship to the earth's geoid —note the accuracy of locations on a map that are defined relative to the earth's geoid are considered absolute because their positions are global in nature and accurately fix a location that can be referenced to all other locations |
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Term
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Definition
| the amount of radiant energy absorbed by a given substance of definite dimensions; the ratio of the amount of radiant energy absorbed to the total amount incident on that substance |
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Term
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Definition
| a spore that is morphologically like a zygospore but forms parthenogenetically |
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Term
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Definition
| a circle or protractor graduated in 360° in a clockwise direction from true (astronomic) north |
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Term
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Definition
| the horizontal angle of a point, measured clockwise from true (astronomic) north |
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Term
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Definition
| GIS a reference line in a coordinate system |
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Term
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Definition
| the angle formed between a plant stem and any organ developing from it, e.g., a leaf axil |
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Term
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Definition
| sterile, e.g., tissue culture cells that are free from contaminating organisms |
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Term
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Definition
| the total yarding distance for all turns divided by total number of turns for a particular setting |
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Term
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Definition
| that portion of soil water which plants can extract, generally measured per unit of soil volume and usually estimated in freely draining soils as the amount of water between field capacity and the permanent wilting point |
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Term
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Definition
| that portion of the total wildland fuel that would actually be consumed under specified burning conditions |
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Term
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Definition
| the amount of soil nutrients in chemical forms accessable to plant roots or compounds likely to be convertible to such forms during the growing season |
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Term
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Definition
| a natural organic compound formed in actively growing parts of plants, particularly in the growing points of shoots, which in minute concentrations regulates cell expansion and other developmental processes |
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Term
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Definition
| pertaining to organisms that manufactured their own energy (food) exclusively from inorganic substances or from sunlight, e.g., green plants and primary producers |
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Term
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Definition
| a polyploid resulting from the multiplication of a single set of chromosomes |
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Term
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Definition
| computerized map data used for the management of resources |
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Term
| automated mapping and facilities management |
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Definition
| a GIS technology focused on the specific segment of the market concerned with specialized infrastructure and geographic facility information applications and management, such as roads, pipes, and wires |
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Term
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Definition
| originating from within a system |
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Term
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Definition
| a type of life cycle in rust fungi in which all stages occur on one host |
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Term
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Definition
| the internal correlation between members of a series of observations ordered in time or space |
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Term
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Definition
| 1. pertaining to organic substances, materials, or organisms originating within a particular stream or river and remaining in that watercourse 2. pertaining to rocks, mantle rock, peat, soils, or their constituents, formed at the site |
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Term
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Definition
| 1. the ecology of an individual organism or taxonomic group 2. the study of environmental factors and their effects on plants |
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Term
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Definition
| sampling where the characteristics under consideration are attributes |
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Term
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Definition
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Term
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Definition
| a characteristic of a geographic feature described by numbers or characters, typically stored in tabular format and linked to the feature by an identifier, e.g., attributes of a well (represented by a point) might include depth, pump type, location, and gallons per minute |
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Term
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Definition
| a qualitative characteristic (variable) of an individual or group |
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Term
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Definition
| a numeric, text, or image data field in a relational database table that describes a spatial feature such as a point, line, node, area, or cell |
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Term
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Definition
| a substance that elicits a positive direction response, particularly a chemical having positive attraction for animals such as insects |
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Term
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Definition
| the reduction in light intensity though a forest canopy |
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Term
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Definition
| reduction in light intensity in water because of absorption by water molecules, suspended particles, and dissolved substances |
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Term
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Definition
| the pressure exerted by the atmosphere as a consequence of gravitational attraction exerted on the column of air lying directly above the point of question |
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Term
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Definition
| the level at which the stems are severed from the stump —note the term is used when specifying stem diameters in sales of standing timber |
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Term
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Definition
| timber at ground level —note the term is used when specifying tree diameters in sales of standing timber, in contrast to the usual custom of measuring at the stump or at breast height |
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Term
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Definition
| a judgemental decision used in planning to supply missing values, relationships, or societal preferences in order to proceed with the planning process toward a final decision |
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Term
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Definition
| a type of volume table in which the figures for average cubic content are resolved into categories (assortments), mainly by size, in general relation to markets |
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Term
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Definition
| the sexual recombination among individuals similar (positive) or dissimilar (negative) to each other |
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Term
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Definition
| a plant community of some particular kind or grade |
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Term
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Definition
| a species found to be numerically more abundant in a particular forest successional stage or type compared with other areas |
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Term
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Definition
| a network analysis problem that often involves the assignment of agents (e.g., logging trucks, helicopter landings, global positioning system recievers, people) to tasks |
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Term
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Definition
| a procedure used by certifying organizations to determine whether forestry operations meet certification standards |
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Term
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Definition
| the smallest of plant or animal community units, e.g., aphid colonies on particular plants |
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Term
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Definition
| a position facing a particular direction |
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Term
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Definition
| the seasonal appearance of a community, e.g., the spring aspect |
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Term
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Definition
| the process of reproduction without fertilization |
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Term
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Definition
| a saclike specialized hypha borne on asocarps containing ascospores and produced in the perfect stage |
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Term
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Definition
| a sexual spore produced by means of free-cell formation (nuclear fusion) in the ascus |
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Term
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Definition
| a structure in or on which asci are produced |
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Term
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Definition
| a group or a stand of young trees created to direct seeding or by planting seedlings or cuttings |
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Term
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Definition
| the use of computers and program design to perform operations analogous to human abilities of learning and decision making |
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Term
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Definition
| hinged at the center for turning, e.g., a wheeled skidder |
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Term
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Definition
| involving water that rises to the earth's surface under hdrostatic pressure from an aquifer that is confined between two impermeable strata |
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Term
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Definition
| the average value of a series or set of observations, obtained by dividing the algebraic sum of all observations in the set by the number of observations; often referred to as a measure of central location or central tendency |
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Term
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Definition
| a soil moisture regime that has no water available for plants for more than half the cumulative time that the soil temperature at 50 cm (19.6 in) below the surface is > 5°C (41°F) |
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Term
| area of critical environmental concern |
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Definition
| land where special management attention is needed to protect and prevent irreparable damage to important historic, cultural, or scenic values, fish, and wildlife resources |
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Term
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Definition
| the hunter kill per unit area in a given period |
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Term
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Definition
| lighting several individual fires throughout an area to be burned, either simultaneously or in rapid succession, and spaced so that they soon interact to produce a hot, fast-spreading fire throughout the area |
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Term
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Definition
| a mineral soil horizon from which clay and free iron oxides have been removed, or in which the oxides have been segregated to the extent that the color of the horizon is determined primarily by the color of the primary sand and silt particles, rather than by coatings on these particles |
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Term
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Definition
| a mineral soil horizon that is characterized by the illuvial accumulation of phyllosilicate clays |
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Term
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Definition
| a tree protection rule that requires building contractors to tunnel or augur at depth of 2.5 ft (0.76 m) under trees to avoid the damage to the roots and other negative impacts on tree health caused by trenching |
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Term
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Definition
| an organization established to oversee the management of (a) multiple incidents, each if which is being handled by an incident management team (IMT) organization, or (b) a very large incident to which multiple IMTs are assigned |
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Term
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Definition
| a closed figure (polygon) that has a specific measurement in, e.g., square meters or hectares |
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Term
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Definition
| a homogeneous area bounded by one or more arc features, e.g., states, counties, lakes, land-use areas, and census tracts |
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Term
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Definition
| a preservation area for genetic conservation; an ex situ collection of germplasm |
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Term
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Definition
| the form in which a computer is seen by someone who understands its internal commands and instructions and the design of its interface hardware |
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Term
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Definition
| the shape of the tree crown |
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Term
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Definition
| skidding logs or trees using a mounted of trailing arch |
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Term
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Definition
| the flask-shaped female sex organ that contains the egg cell of most gymnosperms, liverworts, mosses, and ferns |
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Term
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Definition
| a supporting device towed behind or mounted on a skidding vehicle |
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Term
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Definition
| the coordinate and topological data structure used by some software to represent linear features and polygon boundaries |
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Term
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Definition
| a specialized extension of an intracellular endomycorrhizal fungal hyphae that increases the exchange surface for the transfer of resources from fungus to plant and vice versa |
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Term
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Definition
| one who possesses the technical skills, through experience and related training, to care for individual trees and related woody plants in the residential, commercial, and public landscape |
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Term
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Definition
| the planting, care, and scientific cultivation of trees and woody vegetation in a nonforest context, usually in relation to orchards or for their ornamental or aesthetic values |
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Term
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Definition
| a place where primarily trees are grown for scientific and educational purposes |
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Term
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Definition
| the shaft on which a circular saw is mounted (including the bearings) |
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Term
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Definition
| a subsurface rock unit, with relatively low permeability, that retards the flow of water |
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Term
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Definition
| a saturated, permeable geologic unit of sediment or rock that can transmit significant quantities of water under ordinary hydraulic gradients |
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Term
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Definition
| a mostly reducing soil mixture regime nearly free of dissolved oxygen due to saturation by groundwater or its capillary fringe and occuring at periods when soil temperature at 50 cm (19.6 in) below the surface is > 5°C (41°F) |
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Term
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Definition
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Term
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Definition
| the determination by a competent authority of value, or the value so determined, of property or goods, e.g., forest land or timber |
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Term
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Definition
| a program or specially defined procedure, generally in addition to the standard set of basic software functions supplied by a GIS |
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Term
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Definition
| an open, cup-, disk-, or saucer-shaped ascocarp in which the asci are borne |
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Term
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Definition
| a form of apomixis in which the reproductive function of the spores is taken over by unspecialized cells |
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Term
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Definition
| the network of connecting dead cells and cell walls that acts as the framework holding the symoplast in place |
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Term
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Definition
| any form of asexual reproduction that tends to substitute for sexual regeneration |
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Term
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Definition
| a form of apomixis in which the reproductive function of the gametes is taken over by unspecialized cells |
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Term
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Definition
| a group of meristematic cells at the apex of a shoot or root that gives rise to primary tissues through cell division followed by cell differentiation |
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Term
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Definition
| the upward growth of terminal shoot meristem(s) at the expense of lateral shoots below them whose development they inhibit |
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Term
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Definition
| lacking plants, e.g., the plantless zone of a lake bottom |
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Term
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Definition
| a small (1 to 6 mm or 0.04 to 0.24 in), soft-bodied, often pear-shaped insect of the family Aphididae (Homoptera) that sucks sap from leaves, stems, or roots |
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Term
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Definition
| a naturally occuring complex of calcium phosphate that is the original source of most phosphate fertilizers |
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Term
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Definition
| a metabolic product of one organism that has inhibitory or toxic effects on another organism |
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Term
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Definition
| of human origin or influence |
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Term
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Definition
| a type of disease characterized by numerous sharply defined necrotic lesions on leaves and twigs and the formation of acervuli |
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Term
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Definition
| the period or stage of expansion of a flower |
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Term
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Definition
| the part of the male flower, usually borne on a stalk (filament), that bears pollen |
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Term
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Definition
| a pair of segmented appendages on the head of all insects except the Protura |
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Term
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Definition
| the amount of water stored in soil on the day of a storm |
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Term
| antecedent precipitation index |
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Definition
| a weighted summation of daily precipitation amounts |
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Term
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Definition
| interference with, or inhibition of, the growth of a living organism due either to creation of unfavorable conditions (e.g., exhaustion of food supplies) or to production of a specific antibiotic substance |
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Term
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Definition
| characterized by lack of oxygen |
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Term
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Definition
| the highest peak discharge of a stream or river in a water year |
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Term
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Definition
| descriptive text used to label geographic data |
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Term
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Definition
| the sum total of exchangeable anions that a soil can absorb |
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Term
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Definition
| the amount of forage necessary for the sustenance of one cow or its equivalent for one month based on forage allowance of 26 dry lb (11.8 kg) per day |
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Term
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Definition
| a number relating the forage dry matter intake (oven-dry basis) of a particular kind or class of animal relative to one animal unit |
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Term
| animal-unit conversion factor |
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Definition
| a number expressing the forage requirements of a particular kind or class of animal relative to the requirement for an animal unit |
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Term
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Definition
| a measure of livestock concentration on a range; considered to be one mature cow of approximately 1,000 lb (436.6 kg), either dry or with a calf of six months of age or less, consuming about 26 lb (11.8 kg) of forage on an oven-dry basis |
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Term
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Definition
| one month's tenure on a range by one animal |
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Term
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Definition
| the result of any kind of animal activity that reduces the growth or causes mortality of trees or forests |
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Term
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Definition
| the angle with which a limb attaches to the trunk of a tree |
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Term
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Definition
| the group of vascular flowering plants that produce seeds enclosed in an ovary |
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Term
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Definition
| having a chromosome number deviating from an exact multiple of the haploid number |
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Term
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Definition
| a portable instrument used in the field to determine differences in ground elevation |
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Term
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Definition
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Term
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Definition
| an advantageous location, generally a fire barrier, from which to start constructing a fireline |
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Term
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Definition
| a drainage basin subdivision used in planning for analyzing cumulative effects on resources |
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Term
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Definition
| a collection of land areas, not necessarily contiguous, sufficiently similar in character that they can be treated as if they were identical |
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Term
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Definition
| any directly viewable printed map on which graphic symbols portray features and values |
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Term
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Definition
| occurring, living, or growing in the absence of free/molecular oxygen |
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Term
| analytical heirarchy process |
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Definition
| an approach to multicriteria decision making based in part on pairwise comparisons for elements in a hierarchy |
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Term
| analysis of the management situation |
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Definition
| a document that summarizes information about resource conditions, uses, demands, and existing management activities and provides the baseline for subsequent steps in the planning process, such as the design of alternatives and affected environment |
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Term
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Definition
| fish that are born and reared in freshwater, move to the ocean to grow and mature, and return to freshwater to reproduce, e.g., salmon, steelheaed, shad |
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Term
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Definition
| an upslope wind resulting from local surface heating as distinct from the effects of larger-scale circulation |
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Term
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Definition
| the process of repaying a principal sum and interest on the unpaid balance in periodic installments over a predetermined period of time |
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Term
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Definition
| writing off the value of an asset over a period of years, generally its expected working life |
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Term
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Definition
| the biological release of NH3 from organic compounds during breakdown, often with the subsequent formation of NH4+ |
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Term
| ASCII(American Standard Code for Information Interchange) |
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Definition
| a set of codes for representing alphanumeric information |
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Term
| American National Standards Institute |
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Definition
| an institution that specifies computer system standards |
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Term
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Definition
| a structure of apetalous flowers, either staminate or pistillate |
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Term
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Definition
| an interaction in which one organism or population adversely affects a second organism or population, but the second has no effect on the first |
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Term
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Definition
| a member of the family Scolytidae and all members of the family Platypodidae (both Coleoptera)whose smaill sylindrical adults make or initiate small round (1 to 3 mm, or 0.04 to 0.12 in) tunnels (appearing in cross-section as shotholes or pinholes) in green timber and living but generally unhealthy, damaged, or dying trees |
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Term
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Definition
| one of two or more plant communities that alternate with each other in space |
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Term
| alternative rate of return |
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Definition
| the opportunity cost rate attached to the use of capital which guides a firm in its choice of investments |
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Term
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Definition
| one of two or more host species that may form the food base for a parasite but is not essential for the completion of the latter's life history |
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Term
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Definition
| one of two or more unlike host species without which a heteroecious insect or pathogen cannot complete its life history |
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Term
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Definition
| the variety of organisms occurring in a particular place or habitat; often called local diversity |
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Term
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Definition
| all sediment deposits resulting directly or indirectly from sediment transport within streams deposited in riverbeds, floodplains, lakes, fans, and estuaries |
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Term
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Definition
| a soil developing from recently deposited water-borne sediments and exhibiting essentially no horizon development or modification of the recently deposited materials |
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Term
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Definition
| the degree of utilization considered desirable and attainable on various parts of a ranch or allotment considering the present nature and condition of the resource, management objectives, and levels of management |
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Term
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Definition
| the amount of forage planned to be used to accelerate range improvement |
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Term
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Definition
| the quantity of timber that may be sold from an area covered by a forest plan during a time period specified by the plan |
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Term
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Definition
| any blemish that does not exclude a piece of timber, lumber, or log from a specific grade |
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Term
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Definition
| the allocation of anticipated future timber yields to the present allowable cut |
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Term
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Definition
| the volume of timber that may be harvested during a given period (usually a year) that is specified by a sustained-yield forest plan |
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Term
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Definition
| the maximum average area burned over a specified period of years that is considered an acceptable loss for a specified area under organized fire suppression |
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Term
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Definition
| a polyploid resulting from the union of different sets of chromosomes usually from different species |
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Term
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Definition
| pertaining to races or populations of the same or similar species that occupy seperate, nonoverlapping geographic ranges or adjacent but different habitats, and that are genetically isolated from each other |
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Term
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Definition
| a semichemical emitted by one organism to another of a different species that incites a response favorable to the emitting organism |
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Term
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Definition
| originating external to a system |
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Term
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Definition
| organisms that are not indigenous to the soil but enter in precipitation, diseased tissues, manure, sewage, etc. |
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Term
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Definition
| pertaining to food organisms, organic matter, and nutrients originating outside and transported into a system |
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Term
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Definition
| the process of distributing a resource through a network based on demand |
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Term
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Definition
| the process of distributing carbon to different plant tissues, e.g., roots, stem, or foliage |
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Term
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Definition
| committing a given area of land or resource to one or more specific uses |
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Term
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Definition
| the process of accumulating a resource from a network based on capacity |
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