Revisions to the National Standards for the Physiognomic Levels of Vegetation Classification in the United States
This project has been discontinued at the request of the FGDC Vegetation Subcommittee as the draft National Vegetation Classification Standard (Version 2.0) accomodates these revisions.
To revise the physiognomic levels for the classification of
vegetation in the United States as defined in the FGDC Vegetation Classification Standards
(FGDC-STD-005, October 1997). The NVC framework was meant to provide an
integrated hierarchy of physiognomic and floristic levels and types.
The FGDC-STD-005 standard defined the physiognomic and floristic levels
and provided a complete set of physiognomic types for the entire U.S.,
but a complete set of floristic types (alliances and associations) was
not available at the time. Now that a draft set of alliance and
association types are available (Grossman et al. 1998, Anderson et al.
1998, NatureServe 2001) we would like to establish procedures for
better linking the floristic and physiognomic levels and types together
in a coordinated fashion, while revising the draft set of physiognomic
types. This project will revise the FGDC-STD-005. Our intent is to
ensure that the physiognomic levels and types meet the need of the
standard as originally stated, not to revise the basic purpose and
scope of the standard.
The physiognomic standards of a national vegetation classification will be FGDC data content standards. The standards will include:
- Classification methodology standards: to revise criteria for the definition of the physiognomic levels in order to improve their linkage with developing floristic units.
- Application standards: to review how well the current physiognomic levels meet the needs of various applications, including links with remote sensing and links with scale.
- Data collection standards: the current data collection standards are, in part, based on the current physiognomic levels. Data collection standards will need to be compatible with any revisions to these levels (i.e. important physiognomic criteria to be recording in the field)
FGDC Vegetation Subcommittee
|Proposal||2001-11-26||FGDC Standards Working Group