Comparing Simulated Carbon Budget of a Lei Bamboo Forest with Flux Tower Data

Xuehe Lu,Jinxun Liu,Ying Wang,Cheng Sun,Hong Jiang,Jiaxin Jin

doi:10.3319/tao.2014.01.13.01(tt)

Abstract

Bamboo forest ecosystem is the part of the forest ecosystem. The distribution area of bamboo forest is limited, but in somewhere, like south China, it has been cultivate for a long time with human management. As the climate change has been take great effect on forest carbon budget, many researchers pay attention to the carbon budget in bamboo forest. Moreover cultivative management had a significant impact on the bamboo forest carbon budget. In this study, we modified a terrestrial ecosystem model named Integrated Biosphere Simulator (IBIS) according the management of Lei bamboo forest. Some management, like fertilization, shoots harvesting and organic mulching in winter, had been incorporated into model. Then we had compared model results with the observation data from a Lei bamboo flux tower. The simulated and observed results had achieved good consistency. Our simulated Lei bamboo forest yearly net ecosystem productivity (NEP) was 0.41 kgC a-1 of carbon, which is very close to the observation data 0.45 kgC a-1 of carbon. And the monthly simulated results can take the change of carbon budget in each month, similar to the data we got from flux tower. It reflects that the modified IBIS model can characterize the growth of bamboo forest and perform the simulation well. And then two groups of simulations were set to evaluate effects of cultivative managements on Lei bamboo forests carbon budget. And results showed that both fertilization and organic mulching had taken positive effects on Lei bamboo forests carbon sequestration.

Highlights

Terrestrial ecosystems absorb about 2.4 ± 0.4 PgC every year (Pan et al 2011)
Ground convering in winter had increased litterfall which impacted on soil carbon pool directly
The shoot harvest and thinning had reduced the biomass of Lei bamboo forests

Summary

Introduction

Terrestrial ecosystems absorb about 2.4 ± 0.4 PgC every year (Pan et al 2011). Forests play a major role in global terrestrial carbon cycling. Bamboo forests are one of important forest types in the world which distributed in the tropical, subtropical, and warm temperate regions (generally between 46° north and 47° south). In China bamboo forest is distributed in 11 southern province and take about 48.5 millions hm which is 2.5% of China forest area and 39% of the world bamboo forest area (SFAPRC 2005). From 1970s to this century (Chen et reported that bamboo forests, such as mao bamboo forest, have more efficient carbon sequestration than typical temperate forests, like Chinese fire and mason pine, in southern China (Zhou and Jiang 2004). The advantage of bamboo forest in carbon sequestration will let it makes an important role in future climate change

Methods

Results

Conclusion