Above-Ground Biomass and Biomass Components Estimation Using LiDAR Data in a Coniferous Forest
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. LiDAR Data Acquisition
2.3. Plot Measurements
2.4. Field-Based Biomass Estimates
2.5. Calculation of LiDAR Metrics
2.6. Statistical Analysis
3. Results
3.1. Biophysical Parameters Description
3.2. Regression Models between Biomass and LiDAR Metrics
3.3. Spatial Distribution Figure of Forest Biomass
Statistic | Minimum | Maximum | Mean | Standard deviation |
---|---|---|---|---|
Stem biomass | 9.80 | 130.82 | 75.19 | 26.02 |
Branch biomass | 1.41 | 21.00 | 11.92 | 4.21 |
Foliage biomass | 2.92 | 22.87 | 13.19 | 3.47 |
Fruit biomass | 0.87 | 6.85 | 4.23 | 1.17 |
Crown biomass | 5.68 | 44.42 | 29.34 | 8.23 |
Above-ground biomass | 17.89 | 174.88 | 104.53 | 33.86 |
Variables | Std | R2 | Adjusted R2 | Model | |
---|---|---|---|---|---|
Stem biomass | Mean, CC | 13.823 | 0.756 | 0.748 | −13.595 + 8.446Mean + 20.378CC |
Branch biomass | Mean, CC | 2.229 | 0.757 | 0.749 | −2.447 + 1.367Mean + 3.300CC |
Foliage biomass | H5 | 2.692 | 0.366 | 0.356 | 7.767 + 0.861H5 |
Fruit biomass | Mean, H85 | 9.507 | 0.591 | 0.578 | 1.726 + 0.541Mean − 0.210H85 |
Crown biomass | Mean, H85, CC | 5.025 | 0.664 | 0.648 | 8.017 + 4.038Mean − 1.502H85 + 7.287CC |
Above-ground biomass | Mean, CC | 18.640 | 0.736 | 0.727 | −9.013 + 10.812Mean + 25.105CC |
Biomass | Stem | Branch | Foliage | Fruit | Crown | Above-ground |
---|---|---|---|---|---|---|
RMSE(Mg·ha−1) | 9.876 | 1.520 | 3.691 | 1.022 | 5.963 | 15.237 |
Relative RMSE(%) | 12.783 | 12.423 | 26.953 | 23.273 | 19.665 | 14.163 |
Accuracy(%) | 87.45 | 87.60 | 80.00 | 80.15 | 82.59 | 87.08 |
4. Discussion and Conclusions
Acknowledgments
Conflicts of Interest
References
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He, Q.; Chen, E.; An, R.; Li, Y. Above-Ground Biomass and Biomass Components Estimation Using LiDAR Data in a Coniferous Forest. Forests 2013, 4, 984-1002. https://doi.org/10.3390/f4040984
He Q, Chen E, An R, Li Y. Above-Ground Biomass and Biomass Components Estimation Using LiDAR Data in a Coniferous Forest. Forests. 2013; 4(4):984-1002. https://doi.org/10.3390/f4040984
Chicago/Turabian StyleHe, Qisheng, Erxue Chen, Ru An, and Yong Li. 2013. "Above-Ground Biomass and Biomass Components Estimation Using LiDAR Data in a Coniferous Forest" Forests 4, no. 4: 984-1002. https://doi.org/10.3390/f4040984