Seasonal and annual stem respiration of Scots pine trees under boreal conditions
文献类型：期刊论文
| 作者 | Zha, TS ; Kellomaki, Z ; Wang, KY ; Ryyppo, A ; Niinisto, S |
| 刊名 | ANNALS OF BOTANY
 |
| 出版日期 | 2004 |
| 卷号 | 94期号:6页码:889_896 |
| 关键词 | stem respiration Pinus sylvestris intra and inter-annual change Q(10) growth respiration maintenance respiration carbon balance |
| ISSN号 | 0305-7364 |
| 通讯作者 | Zha, TS, Univ Joensuu, Fac Forestry, POB 111, FIN-80101 Joensuu, Finland. |
| 中文摘要 | Background and Aims Stem respiration of trees is a major, but poorly assessed component of the carbon balance of forests, and important for geo-chemistry. Measurements are required under naturally changing seasonal conditions in different years. Therefore, intra- and inter-annual carbon fluxes of stems in forests were measured continuously from April to November in three consecutive years. Methods Stem respiratory CO2 fluxes of 50-year-old Scots pine (Pinus sylvestris) trees were continuously measured with a CO2 analyser, and, concomitantly, stem circumference, stein and air temperature and other environmental factors and photosynthesis, were also measured automatically. Key Results There were diurnal, seasonal and inter-annual changes in stem respiration, which peaked at 1600 It during the day and was highest in July. The temperature coefficient of stem respiration (Q(10)) was greater during the growing season than when growth was slow or had stopped, and more sensitive to temperature in the growing season. The annual Q10 remained relatively constant at about 2 over the three years, while respiration at a reference temperature of 15degreesC (R-15) was higher in the growing than in the non-growing season (1(.)09 compared with 0(.)78 mumol m(-2) stem surface s(-1)), but was similar between the years. Maintenance respiration was 76%, 82% and 80% of the total respiration of 17(.)46, 17(.)26 and 19(.)35 mol m(2) stem surface in 2001, 2002 and 2003, respectively, The annual total stem respiration of the stand per unit ground area was 75(.)97 gC m(-2) in 2001 and 74(.)28 gC m(-2) in 2002. Conclusions Stem respiration is an important component in the annual carbon balance of a Scots pine stand, contributing 9% to total carbon loss from the ecosystem and consuming about 8% of the carbon of the ecosystem gross primary production. Stem (or air) temperature was the most important predictor of stem carbon flux. The magnitude of stem respiration is modified by photosynthesis and tree growth. Solar radiation indirectly affects stem respiration through its effect on photosynthesis. (C) 2004 Annals of Botany Company. |
| 学科主题 | Plant Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2011-07-08 |
| 源URL | [http://210.75.237.14/handle/351003/21592]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Zha, TS,Kellomaki, Z,Wang, KY,et al. Seasonal and annual stem respiration of Scots pine trees under boreal conditions[J]. ANNALS OF BOTANY,2004,94(6):889_896. |
| APA | Zha, TS,Kellomaki, Z,Wang, KY,Ryyppo, A,&Niinisto, S.(2004).Seasonal and annual stem respiration of Scots pine trees under boreal conditions.ANNALS OF BOTANY,94(6),889_896. |
| MLA | Zha, TS,et al."Seasonal and annual stem respiration of Scots pine trees under boreal conditions".ANNALS OF BOTANY 94.6(2004):889_896. |
入库方式： OAI收割
来源：成都生物研究所
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