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<br />Management Situation by Revision Topic
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<br />Thl!: Hil!:rarchical Framl!:worl::
<br />
<br />Complex landscape patterns, along with the many processes that form them, exist within a hierarchical
<br />framework. This framework consists of multi-scaled systems that can be viewed as constraints in which
<br />a higher level of organization provides, to some extent, the environment that the lower levels evolve
<br />from. Every level is a discrete functional entity and is also part of the larger whole. Using the hierarchy
<br />concept allows us to define the components of an ecosystem or set of ecosystems and the linkages
<br />between different scales of ecological organization.
<br />
<br />The following levels of hierarchical scale used to define the management situation for the RGNF is
<br />identified below. The scales of ecosystems are described in the AMS in terms of vegetation patterns,
<br />biotic processes, environmental constraints, and disturbances. Table 111-1 presents the National Hierarchy
<br />of Ecological Units (ECOMAP, 1993).
<br />
<br />Table 11I-1. National Hierarchy of Ecological Units
<br />
<br />Planning and Purpose, Objectives, and
<br />Analysis Scale Ecological Units General Use General Size Range
<br />Ecoregions Broad applicability for modeling and 1,000,000'5 to
<br />Global Domain sampling RPA assessment. International 10,000'5 of
<br />Continental Division planning. square miles.
<br />Recional Province
<br />Subregions Sections RPA planning multi-forest. Statewide. 1.000'5 to
<br /> Subsections and multi-agency analysis and 10'5 of 5("uare .miles.
<br /> assessment.
<br />landscape landtype Association Forest or area-wide planning, and 1,000'5 to 100'5
<br /> watershed analysis. of acres
<br />land Unit landtype Project and management area planning 100'510
<br /> landtVoe Phase and analllSis. less than 10 acres.
<br />
<br />Figure 11I-1 and Tables 111-
<br />2 and 11I-3 show the
<br />relationship of the RGNF
<br />to the ecological land
<br />units.
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<br />Figure 11I-1. The RGNF within Ecological Sections
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