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Enclosedtop Chambers System for Investigating Responses of Plant Growth Process to Global Climate Change under Highfrigid Conditions in Southwestern China(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2007 Vol.13 No.5
Page:
601-608
Research Field:
Reviews
Publishing date:

Info

Title:
Enclosedtop Chambers System for Investigating Responses of Plant Growth Process to Global Climate Change under Highfrigid Conditions in Southwestern China
Author(s):
ZHANG Yuanbin WANG Kaiyun QIAO Yunzhou
(1Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China) (2Shanghai Key Laboratory of Urbanization Ecological Processes and Ecological Restoration, East China Normal University, Shanghai 200062, China)
Keywords:
Keywords global climate change enclosedtop chamber plant growth process highfrigid condition
CLC:
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DOI:
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Abstract:
Abstract Chamber system that consists of eight independent, selfcontrolled and enclosedtop chambers has been developed and set up in the Maoxian Mountain Ecological Research Station (103° 53′E and 31°41′N, 1 820 m above sea level and belonging to Chengdu Institute of Biology, Chinese Academy of Sciences) in the upper reaches of the Yangtze River on the eastern part of the Qinghai- Tibet Plateau. The main objectives of the enclosedtop chambers system were to provide a means of assessing the medium to longterm effects and adaptations of global climate change 〔for example, elevated atmospheric CO2 concentration (EC), elevated temperature (ET) and interaction (ECT)〕 on plants growth process at community level. In this experiment the target CO2 concentration in the EC and ECT chambers was set at doubling ambient CO2 concentration, and the target air temperature in the ET and ECT chambers to track the ambient temperature but with a specified addition (+2.0 ℃). Chamber performances were assessed based on the recordings data in 2004. The CO2 concentration and temperature control in these enclosedtop chambers were in general accurate and reliable. The CO2 concentrations in the EC and ECT chambers were within 650~800 μmol mol-1 for 9132% and 9167% of the exposure time. The elevated air temperatures in ET and ECT chambers were within 10~35 ℃ for 9506% and 8873% of the exposure time, respectively. There were some significant chamber effects. Solar radiation and PAR in the chamber were reduced by 20%~40% for 9042% and 8943% of the exposure time, respectively. So the enclosedtop chambers system can provide a wide variety of climatic conditions that are similar to natural regimes under highfrigid conditions in southwestern China. Fig 7, Tab 1, Ref 19

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Last Update: 2007-11-23