C04e_Crown Position Classification_1284LM26Q0079.pdf
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- Solicitation number
- 12363N26Q0079
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Department of Agriculture Forest Service
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This is an appendix containing forestry classification standards for crown position assessment in tree stands. Attachment #7 defines a four-tier classification system used to categorize trees based on their position within a stand's canopy structure: Dominant (D), Co-dominant (C), Intermediate (I), and Suppressed (S). Dominant trees extend above the general canopy level and receive full overhead and lateral sunlight exposure. Co-dominant trees are slightly shorter, receive overhead light, and comprise the main canopy alongside dominants. Intermediate trees are subordinate in crown position and receive direct sunlight only through canopy gaps, subject to strong competition with declining growth and vigor. Suppressed trees are overtopped by the main canopy, receiving minimal overhead sunlight and surviving on filtered light; they exhibit weak growth, slow development, and small, thin live crowns. The document includes both written definitions and a visual cross-section diagram illustrating the relative positioning and characteristics of trees within each classification category.
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Attachment #7 – Crown Position Classification
Crown classification in a stand: D, Dominant; C, Co-dominant; I, Intermediate; S, Suppressed
Dominant Tree - Trees whose crowns are somewhat above the general level of the canopy and are exposed to full sunlight from above and to a certain extent laterally.
Co-dominant Tree - Trees that are not as tall as dominants, with crowns receiving overhead light. They may be confined laterally by the dominants. They are usually as thrifty as dominants and with them comprise the main canopy of the stand.
Intermediate Tree - Trees that are definitely subordinate in crown position, receiving direct sunlight only through holes in the canopy. All trees of this class are subject to strong competition, and growth and vigor is generally declining.
Suppressed Tree - Trees that are (or were) definitely overtopped by the main canopy, receiving almost no free overhead sunlight. They exist by virtue of sunlight that filters through the canopy.
These trees are generally very weak, slow growing, and exhibit very small and thin live crowns.
Attachment #017 – Crown Position Classification
File details come from the government source that posted it. Updated .