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Forests 2015, 6(8), 2631-2654; doi:10.3390/f6082631

Leaf Area Prediction Using Three Alternative Sampling Methods for Seven Sierra Nevada Conifer Species

1
Department of Environmental Science, Policy and Management, University of California, 140 Mulford Hall #3114, Berkeley, CA 94720-3114, USA
2
Watershed Management Division Seattle Public Utilities, 19901 Cedar Falls Road SE, North Bend, WA 98045, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Eric J. Jokela
Received: 23 May 2015 / Revised: 15 July 2015 / Accepted: 21 July 2015 / Published: 31 July 2015
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Abstract

Prediction of projected tree leaf area using allometric relationships with sapwood cross-sectional area is common in tree- and stand-level production studies. Measuring sapwood is difficult and often requires destructive sampling. This study tested multiple leaf area prediction models across seven diverse conifer species in the Sierra Nevada of California. The best-fit whole tree leaf area prediction model for overall simplicity, accuracy, and utility for all seven species was a nonlinear model with basal area as the primary covariate. A new non-destructive procedure was introduced to extend the branch summation approach to leaf area data collection on trees that cannot be destructively sampled. There were no significant differences between fixed effects assigned to sampling procedures, indicating that data from the tested sampling procedures can be combined for whole tree leaf area modeling purposes. These results indicate that, for the species sampled, accurate leaf area estimates can be obtained through partially-destructive sampling and using common forest inventory data. View Full-Text
Keywords: leaf area; LAI (leaf area index); nonlinear mixed-effects modeling leaf area; LAI (leaf area index); nonlinear mixed-effects modeling
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jones, D.A.; O'Hara, K.L.; Battles, J.J.; Gersonde, R.F. Leaf Area Prediction Using Three Alternative Sampling Methods for Seven Sierra Nevada Conifer Species. Forests 2015, 6, 2631-2654.

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