植物生态学报 ›› 2015, Vol. 39 ›› Issue (4): 322-332.DOI: 10.17521/cjpe.2015.0031

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东北林区净初级生产力及大兴安岭地区林火干扰影响的模拟研究

李明泽, 王斌, 范文义*(), 赵丹丹   

  1. 东北林业大学林学院, 哈尔滨 150040
  • 收稿日期:2014-06-09 接受日期:2015-02-15 出版日期:2015-04-01 发布日期:2015-04-21
  • 通讯作者: 范文义
  • 作者简介:

    # 共同第一作者

  • 基金资助:
    国家科技支撑项目(2011BAD37B01)

Simulation of forest net primary production and the effects of fire disturbance in Northeast China

LI Ming-Ze, WANG Bin, FAN Wen-Yi*(), ZHAO Dan-Dan   

  1. College of Forestry, Northeast Forestry University, Harbin 150040, China
  • Received:2014-06-09 Accepted:2015-02-15 Online:2015-04-01 Published:2015-04-21
  • Contact: Wen-Yi FAN
  • About author:

    # Co-first authors

摘要:

森林净初级生产力(NPP)是衡量陆地碳源/汇的重要参数, 准确地估算森林生态系统的NPP, 同时通过引入干扰因子以期更加完整地描述生态学过程及其响应是目前森林生态系统碳循环研究的重点。因此, 该研究基于北方生态系统生产力(BEPS)模型, 结合遥感数据和气象数据等模拟2003年东北林区NPP; 将BEPS模型模拟的结果作为整合陆地生态系统碳收支(InTEC)模型的参考年数据, 模拟东北林区1901-2008年的NPP, 并在InTEC模型中加入林火干扰数据, 模拟大兴安岭地区1966-2008年的森林NPP。结果显示: 在1901年, 东北林区NPP平均值仅为278.8 g C·m-2·a-1, 到了1950年, NPP平均值增加到338.5 g C·m-2·a-1, 2008年NPP平均值进一步增加到378.4 g C·m-2·a-1。其中长白山地区的NPP平均值始终最高, 大兴安岭次之, 小兴安岭始终最低。到了2008年, 大、小兴安岭和长白山地区的NPP平均值都有较大涨幅, 其中涨幅最高的是长白山地区, 达到200-300 g C·m-2·a-1; 东北三省中, 黑龙江和吉林的NPP平均值和总量都比较高, 辽宁相对较低, 但相比于1901年的涨幅最高, 达到70%; 重大火灾(100-1000 hm2)对NPP的影响不是很大, 而特大火灾(>1000 hm2)的影响比较大, 使NPP下降幅度达到10%左右, 其他火灾年份, NPP增长迅速并保持在较高水平; 对火灾面积在100000 hm2以上的4个年份的NPP进行分析, 发现NPP平均值都大幅度下降, 其中1987年下降幅度最大, 为11%以上。

关键词: 北方生态系统生产力模型, 碳循环, 大兴安岭, 林火干扰, 整合陆地生态系统碳收支模型, 净初级生产力, 东北林区

Abstract: <i>Aims</i>

Forest net primary production (NPP) is an important parameter on measuring the terrestrial carbon source/sink. More accurately estimating NPP of forest ecosystems is the focus of carbon cycle. Our objective was to explore how to use remote sensing process model to simulate NPP of the northeast forest more accurately, and what impacts of forest fire disturbance have on NPP.

<i>Methods</i>

In this study, based on remote sensing data and meteorological data, Boreal Ecosystem Productivity Simulator (BEPS) model was used to simulate NPP of the northeast forest in 2003; The result of BEPS model acted as the reference year data of Integrated Terrestrial Ecosystem C-budget (InTEC) model to simulate NPP from 1901 to 2008 of the northeast forest. Then forest fire disturbance data was incorporated in the InTEC model to simulate NPP from 1966 to 2008 of Daxing’an Mountain.

<i>Important findings</i>

The average value of NPP of the northeast forest was only 278.8 g C·m-2·a-1 in 1901. In 1950, average NPP had reached to 338.5 g C·m-2·a-1. The average NPP of the northeast forest in 2008 was 378.4 g C·m-2·a-1; Substantial increase was evidenced for Daxing’an Mountain, Xiaoxing’an Mountain and Changbai Mountain with 200 g C·m-2·a-1 to 300 g C·m-2·a-1 increase for Changbai Mountain. The average and total value of NPP of Liaoning in 2008 was relatively low, but was still 70 percent higher than that in 1901. Moderate and large fires did not drastically reduce NPP, with less than 10 percent reduction during the year of fire occurrence. In the following years, NPP recovered quickly and maintained at a high level. NPP reduced substantially in each of the four years with burned area exceeding 100000 hm2 in Daxing’an Mountain.

Key words: Boreal Ecosystem Productivity Simulator model, carbon cycle, Daxing’an Mountain, forest fire disturbance, Integrated Terrestrial Ecosystem C-budget model, net primary productivity, northeast forest