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Forests 2016, 7(8), 173; doi:10.3390/f7080173

Forest Biomass and Net Primary Productivity in Southwestern China: A Meta-Analysis Focusing on Environmental Driving Factors

1,2,3
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1
,
1
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1,2,3
and
1,2,*
1
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Lincheng West Road 99, Guiyang 550081, China
2
Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, Shawan at Longga village, Puding, Anshun 561000, China
3
College of Earth Sciences, University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mark E. Harmon
Received: 18 June 2016 / Revised: 1 August 2016 / Accepted: 2 August 2016 / Published: 6 August 2016
(This article belongs to the Collection Forests Carbon Fluxes and Sequestration)
View Full-Text   |   Download PDF [4017 KB, uploaded 6 August 2016]   |  

Abstract

Biomass and net primary productivity (NPP) are important factors for studying terrestrial carbon storage and the carbon cycle. Using data from existing literature, this study synthesized and analyzed a comprehensive database of direct field observations of forest biomass and NPP for Southwestern China. The biomass of mature natural forests and mature planted forests range from 81.2 Mg·ha−1 to 692.6 Mg·ha−1 (mean = 288.1 Mg·ha−1) and from 76.8 Mg·ha−1 to 670.1 Mg·ha−1 (mean = 181.5 Mg·ha−1), respectively. Mature natural forests have higher biomass than mature planted ones. The NPP values of natural and planted forests range from 1.4 Mg·ha−1·year−1 to 29.6 Mg·ha−1·year−1 (mean = 13.6 Mg·ha−1·year−1) and from 0.6 Mg·ha−1·year−1 to 26.5 Mg·ha−1·year−1 (mean = 9.9 Mg·ha−1·year−1), respectively. Correlations among biomass, NPP, and environmental factors show that NPP significantly decreases with latitude and increases with mean annual temperature, mean annual precipitation, growing degree-days on a 0 °C base, and mean annual drought index, whereas biomass positively correlates with stand age and leaf area index strongly. Karst forests exhibit almost the same NPP as non-karst forests, but the former have significantly lower biomass compared to the latter. Comprehensive regional data synthesis and analysis based on direct field observations of forest biomass and NPP are important for benchmarking global and regional vegetation and carbon models, estimating regional carbon content, restoring vegetation, and mitigating climate change. View Full-Text
Keywords: biomass; NPP; data synthesis; climates; karst morphology biomass; NPP; data synthesis; climates; karst morphology
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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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Liu, L.B.; Yang, H.M.; Xu, Y.; Guo, Y.M.; Ni, J. Forest Biomass and Net Primary Productivity in Southwestern China: A Meta-Analysis Focusing on Environmental Driving Factors. Forests 2016, 7, 173.

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