Vegetation Classification and Mapping Project Report - USGS

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USGS-NPS Vegetation Mapping Program Colonial National Historical Park Tree fern Graminoid Bamboo Succulent forb Needle-leaved shrub Aquatic herb (floating & submergent) Broad-leaved deciduous shrub Moss Broad-leaved evergreen shrub Alga Thorn shrub Lichen Evergreen schlerophyllous shrub Fern or fern ally Other/unknown Other herbaceous Other shrub Liverwort/hornwort Species: Global scientific name (and common name) for each floristic component species of the Association as it occurs within the park. Characteristic Species: Component plant species that are characteristic for the Association as it occurs within the park. Other Noteworthy Species: Other noteworthy species (i.e., species that are not necessarily diagnostic of the Association, but that are worth noting for some other reasons, such as those that are rare species or nonnative invasives) that are found within the Association in the park. Subnational Distribution with Crosswalk Data State: The two-letter postal code of the for U.S. state(s) in which the park occurs. State Rank (SRank): The Heritage Conservation Subnational Rank that best characterizes the relative rarity or endangerment of the Association within the specified state. Values for State Rank are listed in Appendix D. An asterisk (*) indicates that the Subnational Rank is for the Natural Heritage Program (NHP) Element (nonstandard), not the USNVC Association (standard) (see below). Relationship (Rel): The State Name (see below) is the name that the state NHP applies to their community Element. The Relationship to Standard is a value that indicates the relationship between the NHP (Nonstandard) Element and the related Standard Association (USNVC). Values for Relationship to Standard are: = – Equivalent: NHP community is equivalent to the standard Association B – Broader: the NHP community is more broadly classified than the standard Association F – Finer: the NHP community is more finely classified than the standard Association I – Intersecting: the NHP community is not clearly broader or finer than this standard Association; the standard and NHP communities are related in a way that is more complex than a simple broader/finer relationship ? – Undetermined: the relationship between the NHP community and this standard Association is unknown 350
USGS-NPS Vegetation Mapping Program Colonial National Historical Park Confidence (Conf): Values for Confidence are: C - Certain; S - Somewhat certain; N - Not certain (null) - Not assessed or unknown. State Name (SName): If the USNVC Association has been crosswalked to a state classification type and it is equivalent to the USNVC type, the State Name is the name that the Natural Heritage Program applies to the same community. A value of [gname] indicates that the State Name is the same as the Global Name. A value of [not crosswalked] indicates that no state type representing the concept of the USNVC Association has been identified. If a state type has been identified that is NOT equivalent to the USNVC Association (Standard), then the subnational type is considered a Nonstandard community. In this case, the State Name is the name of the nonstandard community. Reference: This is the primary reference for the Natural Heritage Program classification that contains the State Name and confirms the presence of the Association in the state. Local Range: A description of the total range (including present and historic, if known) of the Association within the park. Classification Comments: Comments about classification criteria used to define the Association or description of any remaining issues associated with its classification in the park. Other Comments: Additional comments about the Association within the park. Local Description Authors: Name(s) of the person(s) primarily responsible for authorship of the current description of this Association in the park. Plots: List of plot codes for plots used in the identification and classification of the Association in the park. Inventory Notes: Information regarding the sampling of the Association in the park. GLOBAL INFORMATION USNVC Classification Physiognomic Class: The second level of the USNVC which is a vegetation structural classification adapted from UNESCO 1973 and Driscoll et al. 1984. This level is based on the structure of the vegetation. This is determined by the height and relative percentage of cover of the dominant life-forms: tree, shrub, dwarf-shrub, herbaceous, and nonvascular. Physiognomic Subclass: The third level of the USNVC. This level is determined by the predominant leaf phenology of classes defined by a tree, shrub, or dwarf-shrub stratum, the persistence and growth form of herbaceous and nonvascular vegetation, and particle size of the substrate for sparse vegetation (e.g., consolidated rocks, gravel/cobble). Physiognomic Group: The fourth level of the USNVC. The group generally represents a grouping of vegetation units based on leaf characters, such as broad-leaf, needle-leaf, 351
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Vegetation Classification and Mapping Project Report - USGS

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