Estimation of aboveground biomass for alpine shrubs in the upper reaches of the Heihe River Basin, Northwestern China

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• 作者：Zhangwen Liu ; Rensheng Chen ; Yaoxuan Song ; Chuntan Han…
• 关键词：Aboveground biomass ; Allometric equation ; Heihe River Basin ; Shrubs
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：73
• 期：9
• 页码：5513-5521
• 全文大小：803 KB
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• 作者单位：Zhangwen Liu (1)
  Rensheng Chen (1)
  Yaoxuan Song (1)
  Chuntan Han (1)
  Yong Yang (1)
  
  1. Qilian Alpine Ecology and Hydrology Research Station, Key Laboratory of Ecohydrology of Inland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang west Road, Chengguan District, Lanzhou, 730000, People’s Republic of China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

Shrubs are important components of alpine mountain ecosystems in terms of productivity and diversity. An estimation of shrub biomass using allometric equations represents a non-destructive option for obtaining useful quantitative data. However, species-specific allometric equations for alpine shrubs have yet to be developed in sufficient detail. This study proposed allometric equations that can be used to estimate aboveground biomass of alpine shrubs. These are based on easily acquired descriptive parameters of plant height (H), crown area (C), basal diameter (D), and D 2 H (basal diameter squared?×?total H) for four of the most abundant alpine shrub species in the upstream ecosystems of China’s Heihe River Basin: Salix cupularis, Salix oritrepha, Potentilla fruticosa, and Caragana jubata. The results show that several equations relating biomass categories to H, C, and D 2 H provided significant (P?<?0.01) data for measuring aboveground biomass; the determination coefficients (R 2) varied from 0.95 to 0.97 and fit indices (FIs) varied from 0.96 to 0.97. The form and variables comprising the allometric equations differed among species-specific models. Aboveground shrub biomass increased with D 2 H for S. cupularis and C. jubata, whereas it increased with C and H for P. fruticosa. For S. oritrepha, an exponential function provided the best-fit model with C. However, the results could provide useful approximations of aboveground biomass of similar shrubs currently lacking such equations. The allometric equations also provide a useful and non-destructive method of estimating aboveground shrub biomass in alpine ecosystems.