由生態代謝理論之觀點推估近熱帶山地森林枯落物產量

胡愷庭

doi:10.6342/NTU201700528

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由生态代谢理论之观点推估近热带山地森林枯落物产量

A metabolic scaling theory driven approach to estimate litter production in near tropical montane forests

胡恺庭 , 硕士　　导师：黄倬英　　

英文 DOI： 10.6342/NTU201700528

净初级生产量；扁柏；红桧；光达；干扰；遥测；碳循环； Chamaecyparis obtusa var. formosana ； Chamaecyparis formosensis ； hinoki ； lidar ； disturbance

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摘要 │ 参考文献 (65) │ 国际计量

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Litterfall plays a crucial role in the carbon and nutrient cycles of forest ecosystems. The amount of litterfall governs the amount of carbon and nutrient to be returned in a forest ecosystem. However, when it comes to quantifying forest litterfall, collection of canopy characteristic parameters for existing litterfall models is usually time-consuming and labor-intensive. Recent studies indicated that, in metabolic scaling theory, there is a common relationship between terrestrial plant production and biomass; a major part of the production is contributed by litterfall. Therefore, there could be a relationship between litterfall and biomass, which could facilitate large spatial scale estimation of litterfall since biomass may be assessed using remote sensing. To investigate this relationship, we acquired monthly litterfall of a hinoki (Chamaecyparis spp.) dominant montane forest in the northeastern Taiwan (23.98 N, 120.97 E) across the elevation range of 1267–2080 m a.s.l. Monthly litterfall data were recorded from fifteen 0.09 ha plots and each plot consisted from four randomly arranged 0.5 m2 litterfall traps. In addition, diameter at breast height of each live hinoki tree (n = 1,128) within all plots was measured and total biomass was derived using an in-situ species-specific allometry. Species-specific hinoki litterfall regression models were developed for two seasons (growing season: March–June, typhoon season: July–October) across a wide range of biomass density. We found that the relationship between biomass and litterfall might depend on the amount of total biomass. In both seasons, increase of litter production with increase of biomass density could be found when biomass is less than about 200 Mg ha-1, after that, inverse relationship appears. With the aid of high spatial resolution airborne light detection and ranging (lidar) data, we may be able to provide a spatial layer of hinoki biomass and map monthly litterfall over a vast region based on this biomass-litterfall relationship. At the end, the litterfall map were verified by three ground truth litterfall measurements with satisfactory results (R2 = 0.98, p < 0.05, RMSE = 23.12 Mg ha^-1 month^-1). Furthermore, the study could facilitate our understanding of the mechanism governing the litter production and improve future prediction of metabolic scaling theory on ecosystem function.

参考文献 ( 65 ) 〈TOP〉

Allen, A., Gillooly, J., & Brown, J. (2005). Linking the global carbon cycle to individual metabolism. Functional Ecology, 19, 202-213
连结：
Anderson, J.E., Plourde, L.C., Martin, M.E., Braswell, B.H., Smith, M.-L., Dubayah, R.O., Hofton, M.A., & Blair, J.B. (2008). Integrating waveform lidar with hyperspectral imagery for inventory of a northern temperate forest. Remote Sensing of Environment, 112, 1856-1870
连结：
Aragão, L., Malhi, Y., Metcalfe, D., Silva-Espejo, J.E., Jiménez, E., Navarrete, D., Almeida, S., Costa, A., Salinas, N., & Phillips, O.L. (2009). Above-and below-ground net primary productivity across ten Amazonian forests on contrasting soils. Biogeosciences, 6, 2759-2778
连结：
Baccini, A., Laporte, N., Goetz, S., Sun, M., & Dong, H. (2008). A first map of tropical Africa’s above-ground biomass derived from satellite imagery. Environmental Research Letters, 3, 045011
连结：
Chambers, J.Q., Asner, G.P., Morton, D.C., Anderson, L.O., Saatchi, S.S., Espírito-Santo, F.D., Palace, M., & Souza, C. (2007). Regional ecosystem structure and function: ecological insights from remote sensing of tropical forests. Trends in Ecology & Evolution, 22, 414-423
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引用含有DOI的文献

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DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。