Seasonal production, allocation and cycling of carbon in two mid-elevation tropical montane forest plots in the Peruvian Andes

Seasonal production, allocation and cycling of carbon in two mid-elevation tropical montane forest plots in the Peruvian Andes
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秘鲁安第斯山脉两个中海拔热带山地森林地块的碳季节性生产、分配和循环

DOI:
10.1080/17550874.2013.819042
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发表时间:
2013
影响因子:
1.5
通讯作者:
Huasco W
Huasco W
中科院分区:
生物学3区
文献类型:
--
作者:
Huasco W

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背景:热带山地云雾林是一种独特的生态系统,具有高度的生物多样性和巨大的碳库。到目前为止,已经有有限的描述TMCF.Aims的碳循环:我们目前的结果上的生产,分配和碳循环两个中海拔(1500-1750米)的热带山地云雾林地块在圣佩德罗,科斯尼帕塔谷,秘鲁。方法:我们反复记录的组件的净初级生产力(NPP)使用生物测量,和自养(Ra)和异养(Rh)呼吸,使用气体交换测量。从这些,我们估计总初级生产力(GPP)和碳利用效率(CUE)在情节level.Results:情节在1500米被发现非常富有成效,我们的结果与最富有成效的低地亚马逊森林。在1750米的地块有显着较低的生产力,可能是因为更大的云浸没。这两个地块有相似的模式ofNPPallocation,大量的季节性NPP组件和小季节性Ra。结论:这两个地块位于低层和高层山地森林之间的交错带内,云底附近的水平。气候变化可能会增加云底的高度,导致森林功能的变化。对这些地点的碳循环进行长期监测,将有助于了解TMCF对云基变化的反应。
Background:Tropical montane cloud forests (TMCF) are unique ecosystems with high biodiversity and large carbon reservoirs. To date there have been limited descriptions of the carbon cycle of TMCF.Aims:We present results on the production, allocation and cycling of carbon for two mid-elevation (1500–1750 m) tropical montane cloud forest plots in San Pedro, Kosñipata Valley, Peru.Methods:We repeatedly recorded the components of net primary productivity (NPP) using biometric measurements, and autotrophic (Ra) and heterotrophic (Rh) respiration, using gas exchange measurements. From these we estimated gross primary productivity (GPP) and carbon use efficiency (CUE) at the plot level.Results:The plot at 1500 m was found very productive, with our results comparable with the most productive lowland Amazonian forests. The plot at 1750 m had significantly lower productivity, possibly because of greater cloud immersion. Both plots had similar patterns ofNPPallocation, a substantial seasonality inNPPcomponents and little seasonality inRa.Conclusions:These two plots lie within the ecotone between lower and upper montane forests, near the level of the cloud base. Climate change is likely to increase elevation of the cloud base, resulting in shifts in forest functioning. Longer-term surveillance of the carbon cycle at these sites would yield valuable insights into the response of TMCFs to a shifting cloud base.
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发表时间: 2012-04
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发表时间: 2007-04-03
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秘鲁亚马逊流域西南部两片低地热带森林的生产力、新陈代谢和碳循环
DOI: 10.1080/17550874.2013.820805
发表时间: 2013
影响因子: 1.5
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