Productivity and carbon allocation in a tropical montane cloud forest in the Peruvian Andes
Productivity and carbon allocation in a tropical montane cloud forest in the Peruvian Andes
复制标题
DOI：
10.1080/17550874.2013.820222
复制
发表时间：
2014-01-01
影响因子：
1.5
通讯作者：
Malhi, Yadvinder
中科院分区：
文献类型：
--
作者：
Girardin, Cecile A. J.;Silva Espejob, Javier E.;Malhi, Yadvinder
背景：东安第斯山脉的斜坡拥有地球上最高的生物多样性和高比例的特有物种。然而，对热带山地森林地区碳收支的描述很少，也很有限。目的：我们首次提供了秘鲁安第斯山脉科斯尼帕塔山谷两个高海拔（约3000米）热带山地云雾林地块的碳生产、分配和循环的综合数据。方法：通过测量净初级生产力（NPP）、自养呼吸（R-a）和异养呼吸（R-h）的主要成分和季节变化，估算2个1 ha样地的总初级生产力（GPP）和碳利用效率（CUE）。结果：2个样地NPP分别为7.05 +/- 0.39和8.04 +/- 0.47 Mg C ha（-1）年（-1），GPP分别为22.33 +/- 2.23和26.82 +/- 2.97 Mg C ha（-1）年（-1），CUE分别为0.32 +/- 0.04和0.30 +/- 0.04。结论：NPP具有较强的季节性，而R-a具有中等的季节性，表明森林NPP受光合作用的驱动，并突出了太阳辐射变化的重要性。我们的研究结果表明，树木在太阳辐射较低的凉爽季节投入更多的生物质生产，而在太阳辐射较高的温暖季节投入更多的维护。
Background: The slopes of the eastern Andes harbour some of the highest biodiversity on Earth and a high proportion of endemic species. However, there have been only a few and limited descriptions of carbon budgets in tropical montane forest regions.Aims: We present the first comprehensive data on the production, allocation and cycling of carbon for two high elevation (ca. 3000 m) tropical montane cloud forest plots in the Kosnipata Valley, Peruvian Andes.Methods: We measured the main components and seasonal variation of net primary productivity (NPP), autotrophic (R-a) and heterotrophic (R-h) respiration to estimate gross primary productivity (GPP) and carbon use efficiency (CUE) in two 1-ha plots.Results: NPP for the two plots was estimated to be 7.05 +/- 0.39 and 8.04 +/- 0.47 Mg C ha(-1) year(-1), GPP to be 22.33 +/- 2.23 and 26.82 +/- 2.97 Mg C ha(-1) year(-1) and CUE was 0.32 +/- 0.04 and 0.30 +/- 0.04.Conclusions: We found strong seasonality in NPP and moderate seasonality of R-a, suggesting that forest NPP is driven by changes in photosynthesis and highlighting the importance of variation in solar radiation. Our findings imply that trees invest more in biomass production in the cooler season with lower solar radiation and more in maintenance during the warmer and high solar radiation period.