Assessing tree dendrometrics in young regenerating plantations using terrestrial laser scanning
- 392 Downloads
Terrestrial laser scanning (TLS) provides a valuable tool for the retrieval of detailed individual-tree structural parameters, but has never previously been applied to young stands under field conditions.
The aim was to explore the performance of TLS in a young tree plantation located in a heterogeneous environment in subtropical China.
We investigated 438 young trees for congruence between direct field and TLS measurements of total tree height, stem diameter at ground height, and length and height of the longest branch using correlation tests. We applied generalized linear models to examine whether congruence was affected by the observed structural parameter or extrinsic factors (e.g., potential occlusion, point cloud quality).
TLS made it possible to detect trees higher than 40 cm. The TLS-retrieved data were highly congruent with the data obtained from direct measurements. The poor descriptions of stems and branches of some individuals of small-sized and leaf-on tree species were due to occlusion by ground vegetation and leaf-on branches. Observed structural parameter and extrinsic factors did not explain the variance between the two approaches.
TLS proved to be a promising tool for high-resolution, non-destructive analyses of tree dendrometrics in young regenerating plantations.
KeywordsBEF-China Regeneration phase Subtropical China Point cloud TLS
This research was carried out as part of the BEF-China project financed by the German Research Foundation (DFG FOR 891/2). We are grateful to all members of BEF-China for their support and to Lars Goldbach for his valuable assistance in the scanning campaign. We thank the two anonymous reviewers for comments that considerably improved the earlier version of the manuscript.
- Bruelheide H, Böhnke M, Both S, Fang T, Assmann T, Baruffol M, Bauhus J, Buscot F, Chen XY, Ding BY, Durka W, Erfmeier A, Fischer M, Geißler C, Guo DL, Guo LD, Härdtle W, He JS, Hector A, Kröber W, Kühn P, Lang AC, Nadrowski K, Pei KQ, Scherer-Lorenzen M, Shi XZ, Scholten T, Schuldt A, Trogisch S, von Oheimb G, Welk E, Wirth C, Wu YT, Yang XF, Zeng XQ, Zhang SR, Zhou HZ, Ma KP, Schmid B (2011) Community assembly during secondary forest succession in a Chinese subtropical forest. Ecol Monogr 81:25–41CrossRefGoogle Scholar
- Bruelheide H, Nadrowski K, Assmann T, Bauhus J, Both S, Buscot F, Chen XY, Ding BY, Durka W, Erfmeier A, Gutknecht J, Guo D, Guo LD, Härdtle W, He JS, Klein A, Kühn P, Liang Y, Liu X, Michalski S, Niklaus P, Pei K, Scherer-Lorenzen M, Scholten T, Schuldt A, Seidler G, von Oheimb G, Welk E, Wirth C, Wubet T, Yang XF, Yu MJ, Zhang SR, Zhou HZ, Fischer M, Ma KP, Schmid B (2014) Designing forest biodiversity experiments: general considerations illustrated by a new large experiment in subtropical China. Methods Ecol Evol. doi: 10.1111/2041-210X.12126
- Henning JG, Radtke PJ (2006) Detailed stem measurements of standing trees from ground-based scanning LiDAR. For Sci 52:67–80Google Scholar
- Lichti DD, Gordon SJ, Stewart MP (2002) Ground-based laser scanners: operation, systems and applications. Geophys J Roy Astron Soc 56:21–33Google Scholar
- Pretzsch H (2009) Forest dynamics, growth and yield: from measurement to model. Springer, BerlinGoogle Scholar
- Thies M, Spieker H (2004) Evaluation and future prospects of terrestrial laser scanning for standardized forest inventories. Int Arch Photogram Rem Sens Spatial Inform Sci 36:192–197Google Scholar
- Watt PJ, Donoghue DNM, Dunford RW (2003) Forest parameter extraction using terrestrial laser scanning. Proc. ScandLaser Scientific Workshop on Airborne Laser Scanning of Forests, Umeå, Sweden, 237–244Google Scholar
- Wezyk P, Koziol K, Glista M, Pierzchalski M (2007) Terrestrial laser scanning versus traditional forest inventory: First results from the Polish forests. In: Proc. Laser Scanning 2007 and Silvilaser 2007. ISPRS Commission III Workshop, Vol. 36, Part 3, Espoo, Finland, Sept. 12–14, 2007Google Scholar
- Yang XF, Bauhus J, Both S, Fang T, Härdtle W, Kröber W, Ma KP, Nadrowski K, Pei KQ, Scherer-Lorenzen M, Scholten T, Seidler G, Schmid B, von Oheimb G, Bruelheide H (2013) Establishment success in a forest biodiversity and ecosystem functioning experiment in subtropical China (BEF-China). Eur J For Res 132:593–606CrossRefGoogle Scholar