Measuring and simulating crown respiration of Scots pine with increased temperature and carbon dioxide enrichment

	Measuring and simulating crown respiration of Scots pine with increased temperature and carbon dioxide enrichment
	Wang, KY ; Zha, T ; Kellomaki, S
刊名	ANNALS OF BOTANY
	2002
卷号	90 期号:3 页码:325_335
关键词	environment-controlled chambers CO2 and temperature elevation crown respiration simulation Scots pine
ISSN号	0305-7364
通讯作者	Wang, KY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
中文摘要	Acclimation to elevated atmospheric carbon dioxide concentration and temperature of respiration by the foliage in the crown of Scots pine (Pinus sylvestris) trees is measured and modelled. Starting in 1996, individual 20-year-old trees were enclosed in chambers and exposed to either normal ambient conditions (CON), elevated CO2 concentration (EC), elevated temperature (ET) or a combination of EC and ET (ECT). Respiration of individual leaves within the crown was measured in 2000. To extrapolate the response of respiration of individual leaves to the whole crown, a multi-layer model was developed and used to predict daily and annual crown respiration, in which the crown structure and corresponding microclimate data were used as input. Respiration measurements showed that EC led to higher Q(10) values (4.6%) relative to CON, but lower basal respiration rates at 20 degreesC [R-1.d(20)] (-7.1%) during the main growth season (days 120-240), whereas ET and ECT both reduced Q(10) (-12.0 and -9.8 %, respectively) throughout the year but increased R-1.d(20) (27.2 and 21.6 %, respectively) during the period of no-growth, and slightly reduced R-1.d(20) (-1.7 and -2.8 %, respectively) during the main growth season. Model computations showed that annual crown respiration increased: (1) by 16 % in EC, with 92 % of this increase attributable to the increase in foliage area; (2) by 35 % in ET, with 66 % related to the increase in foliage area and 17 % to the rise in ambient temperature; and (3) by 27 % in the case of ECT, with 43 % attributable to the increase in foliage area and 29 % to the rise in ambient temperature. Changed respiration parameters for individual leaves, induced by treatments, made only a small contribution to the annual crown respiration compared with the increased foliage area. The effects of changes in crown architecture and nitrogen distribution, caused by treatments, on the daily and annual course of crown respiration are discussed. (C) 2002 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
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/21334]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Wang, KY,Zha, T,Kellomaki, S. Measuring and simulating crown respiration of Scots pine with increased temperature and carbon dioxide enrichment[J]. ANNALS OF BOTANY,2002,90(3):325_335.
APA	Wang, KY,Zha, T,&Kellomaki, S.(2002).Measuring and simulating crown respiration of Scots pine with increased temperature and carbon dioxide enrichment.ANNALS OF BOTANY,90(3),325_335.
MLA	Wang, KY,et al."Measuring and simulating crown respiration of Scots pine with increased temperature and carbon dioxide enrichment".ANNALS OF BOTANY 90.3(2002):325_335.