قارن الطرق

	أخذ عينات جرد الغابات	تقدير الغطاء النباتي للتاج
المجال	علوم الغابات	علوم الغابات
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1973	2000s
صاحب الطريقة	Loetsch, Zöhrer, and Haller	Jennings, Brown, Sheil, and colleagues
النوع	Statistical sampling pipeline	Measurement and estimation pipeline
المصدر التأسيسي	Loetsch, F., Zöhrer, F., & Haller, K. E. (1973). Forest Inventory. BLV Verlagsgesellschaft.	Jennings, S. B., Brown, N. D., & Sheil, D. (2000). Assessing Forest Canopies and Understorey Illumination: Methods and Applications. Forest Ecology and Management, 129(1-3), 219–243.
الأسماء البديلة	Forest stand sampling, Timber inventory sampling, Plot-based forest survey	Canopy closure measurement, Crown cover estimation, Overstory density assessment
ذات صلة	4	4
الملخص	Forest inventory sampling is a systematic approach to estimate forest characteristics such as timber volume, species composition, and biomass by surveying a representative subset of trees rather than conducting exhaustive censuses. Developed by Loetsch and colleagues in the 1970s, the method applies statistical sampling theory to forest assessment and remains the foundation for sustainable forest management and resource monitoring worldwide.	Canopy cover, or canopy closure, is the proportion of ground area covered by tree crowns when viewed from above, typically expressed as a percentage. Formalized by Jennings and colleagues in pioneering work on tropical forest structure, canopy cover estimation employs multiple methods—from field-based ocular assessment to sophisticated remote sensing and terrestrial LiDAR—providing essential data on forest structure, light availability, and habitat characteristics relevant to ecology, silviculture, and climate research.