WANG Huimin1; SAIGUSA Nobuko2; ZU Yuangang3; WANG Wenjie3; YAMAMOTO Susumu4; KONDO Hiroaki2
Source Publicationjournalofforestryresearch
AbstractThe Dahurian larch forest in northeast China is important due to its vastness and location within a transitional zone from boreal to temperate and at the southern distribution edge of the vast Siberian larch forest. The continuous carbon fluxes were measured from May 2004 to April 2005 in the Dahurian larch forest in Northeast China using an eddy covariance method. The results showed that the ecosystem released carbon in the dormant season from mid-October 2004 to April 2005, while it assimilated CO2 from the atmosphere in the growing season from May to September 2004. The net carbon sequestration reached its peak of 112 g.m^-2.month ^-1 in June 2004 (simplified expression of g (carbon).m^-2.month^-1) and then gradually decreased. Annually, the larch forest was a carbon sink that sequestered carbon of 146 g-m^-2.a^-1 (simplified expression of g (carbon).m^-2.a^-1) during the measurements. The photosynthetic process of the larch forest ecosystem was largely affected by the vapor pressure deficit (VPD) and temperature. Under humid conditions (VPD 〈 1.0 kPa), the gross ecosystem production (GEP) increased with increasing temperature. But the net ecosystem production (NEP) showed almost no change with increasing temperature because the increment of GEP was counterbalanced by that of the ecosystem respiration. Under a dry environment (VPD 〉 1.0 kPa), the GEP decreased with the increasing VPD at a rate of 3.0 μmol.m^-2.s^-1kPa -1 and the ecosystem respiration was also enhanced simultaneously due to the increase of air temperature, which was linearly correlated with the VPD. As a result, the net ecosystem carbon sequestration rapidly decreased with the increasing VPD at a rate of 5.2 μmol.m^-2.s-1.kPa^-1. Under humid conditions (VPD 〈 1.0 kPa), both the GEP and NEP were obviously restricted by the low air temperature but were insensitive to the high temperature because the observed high temperature value comes within the category of the optimum range.
Document Type期刊论文
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
WANG Huimin,SAIGUSA Nobuko,ZU Yuangang,et al. carbonfluxesandtheirresponsetoenvironmentalvariablesinadahurianlarchforestecosysteminnortheastchina[J]. journalofforestryresearch,2008,019(001):1.
APA WANG Huimin,SAIGUSA Nobuko,ZU Yuangang,WANG Wenjie,YAMAMOTO Susumu,&KONDO Hiroaki.(2008).carbonfluxesandtheirresponsetoenvironmentalvariablesinadahurianlarchforestecosysteminnortheastchina.journalofforestryresearch,019(001),1.
MLA WANG Huimin,et al."carbonfluxesandtheirresponsetoenvironmentalvariablesinadahurianlarchforestecosysteminnortheastchina".journalofforestryresearch 019.001(2008):1.
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