Quantifying the Effects of Wood Moisture and Temperature Variation on Time-of-Flight Acoustic Velocity Measures within Standing Red Pine and Jack Pine Trees
Abstract
:1. Introduction
2. Materials and Methods
2.1. Data Acquisition: Study Sites, Tree Selection and Associated Measurements
2.2. Data Analysis: Model Specification, Parameterization and Evaluation
3. Results
3.1. Model Specifications, Parameter Estimates and Statistical Compliance with Assumptions
3.2. Correction Models
4. Discussion
5. Conclusions
Funding
Acknowledgments
Conflicts of Interest
References
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Species | Sampling Event | Acoustic Velocity (vd; km/s) | Xylem Temperature (tx; °C) | Xylem Moisture (mx; %) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(Date: Day/Month/Year) | Min | Max | SE | Min | Max | SE | Min | Max | SE | ||||
Red | 1 (28,29/4/16) | 4.85 | 4.57 | 5.05 | 0.02 | 9.1 | 3.2 | 12.8 | 0.48 | 38.6 | 35.8 | 41.1 | 0.31 |
pine | 2 (31,1/5,6/16) | 4.90 | 4.72 | 5.11 | 0.02 | 18.6 | 15.4 | 22.6 | 0.45 | 37.8 | 32.4 | 42.5 | 0.42 |
3 (28,29/6/16) | 4.84 | 4.49 | 5.09 | 0.03 | 20.4 | 18.0 | 23.8 | 0.36 | 35.9 | 30.7 | 39.4 | 0.38 | |
4 (3,4/8/16) | 4.85 | 4.62 | 5.22 | 0.03 | 27.5 | 24.1 | 30.9 | 0.34 | 38.2 | 32.0 | 42.1 | 0.50 | |
5 (7,9/9/16) | 4.85 | 4.66 | 5.22 | 0.03 | 22.8 | 16.5 | 25.2 | 0.46 | 40.9 | 31.3 | 45.2 | 0.66 | |
6 (3,4/10/16) | 4.88 | 4.67 | 5.29 | 0.03 | 16.9 | 13.5 | 19.6 | 0.37 | 40.1 | 34.7 | 42.7 | 0.35 | |
Jack | 1 (11,12/5/17) | 4.46 | 4.07 | 4.83 | 0.03 | 15.0 | 9.7 | 20.4 | 0.49 | 39.9 | 33.7 | 49.6 | 0.71 |
pine | 2 (12,13/6/17) | 4.42 | 4.09 | 4.76 | 0.03 | 22.3 | 18.1 | 24.8 | 0.30 | 43.0 | 36.1 | 49.9 | 0.57 |
3 (4,5/7/17) | 4.38 | 4.03 | 4.72 | 0.03 | 22.0 | 17.0 | 26.4 | 0.37 | 39.8 | 33.2 | 46.5 | 0.60 | |
4 (9,10/8/17) | 4.37 | 4.03 | 4.69 | 0.03 | 20.6 | 18.5 | 22.4 | 0.18 | 38.2 | 31.1 | 49.4 | 0.71 | |
5 (18,19/9/17) | 4.37 | 4.01 | 4.73 | 0.02 | 17.5 | 13.1 | 20.9 | 0.38 | 39.8 | 30.9 | 46.8 | 0.66 | |
6 (7,8/11/17) | 4.49 | 4.09 | 4.74 | 0.02 | 1.7 | 0.0 | 2.7 | 0.09 | 32.3 | 25.4 | 42.3 | 0.58 |
Species | Parameter Estimates | Statistics and Validation of Assumptions | ||||||
---|---|---|---|---|---|---|---|---|
SEEa | Homogeneity of Variance b | Independence d | ||||||
H b | Park’s Test c | (%) | ||||||
Red pine | 3.560464 | 0.034175 | 0.112081 | −0.002928 | 0.084 | H0 | H0 | 1 (4) |
Jack pine | 4.494457 | ns | −0.004903 | ns | 0.057 | H0 | H0 | 0 (0) |
Species | Goodness-of-Fit Statistic | Lack-of-Fit Measures c | Predictive Ability: 95% Error Intervals d | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
I2 a | Hypotheses b | Absolute | Relative | Prediction Interval | Tolerance Interval | ||||||
Mean Bias (km/s) | 95% CL c | Mean Bias (%) | 95% CL c | Absolute | Relative | Absolute | Relative | ||||
95% CL (km/s) | 95% CL (%) | 95% CL (km/s) | 95% CL (%) | ||||||||
Red pine | 0.638 | H0 | H0 | 0.000 | ±0.012 | 0.029 | ±0.253 | ±0.154 | ±3.175 | ±0.169 | ±3.477 |
Jack pine | 0.902 | H0 | H0 | 0.000 | ±0.007 | 0.017 | ±0.152 | ±0.100 | ±2.245 | ±0.108 | ±2.425 |
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Newton, P.F. Quantifying the Effects of Wood Moisture and Temperature Variation on Time-of-Flight Acoustic Velocity Measures within Standing Red Pine and Jack Pine Trees. Forests 2018, 9, 527. https://doi.org/10.3390/f9090527
Newton PF. Quantifying the Effects of Wood Moisture and Temperature Variation on Time-of-Flight Acoustic Velocity Measures within Standing Red Pine and Jack Pine Trees. Forests. 2018; 9(9):527. https://doi.org/10.3390/f9090527
Chicago/Turabian StyleNewton, Peter F. 2018. "Quantifying the Effects of Wood Moisture and Temperature Variation on Time-of-Flight Acoustic Velocity Measures within Standing Red Pine and Jack Pine Trees" Forests 9, no. 9: 527. https://doi.org/10.3390/f9090527