Elevated atmospheric CO2 affects decomposition of Festuca vivipara (L.) Sm. litter and roots in experiments simulating environmental change in two contrasting arctic ecosystems
Elevated atmospheric CO2 affects decomposition of Festuca vivipara (L.) Sm. litter and roots in experiments simulating environmental change in two contrasting arctic ecosystems
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大气中二氧化碳浓度升高会影响胎生羊茅 (L.) Sm 的分解。
DOI：
10.1046/j.1365-2486.1997.d01-133.x
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
S. Jonasson
中科院分区：
文献类型：
--
作者：
Clare H. Robinson;A. Michelsen;John A. Lee;S. J. Whitehead;Terry V. Callaghan;Malcolm C. Press;S. Jonasson
质量损失，以及氮和碳的损失，从地上材料和根的Festuca vivipara跟踪了13个月，在高北极极地半沙漠和低北极树线矮灌木石南。用于研究的胎生羊茅是从英国受控环境室中两种不同CO2浓度（350和500 μL L-1）下培养的植物中获得的。随后，将四种资源类型（在高浓度或环境CO2浓度下生长的植物的芽或根）中的每一种都置于模拟每个北极生态系统环境变化方面的实验中。在两个地点使用开顶聚乙烯帐篷增加了空气，凋落物和土壤温度，在北极高海拔地区模拟了夏季降水量增加58%。
Mass loss, together with nitrogen and carbon loss, from above‐ground material and roots of Festuca vivipara were followed for 13 months in a high Arctic polar semi‐desert and a low Arctic tree‐line dwarf shrub heath. Festuca vivipara for the study was obtained from plants cultivated at two different CO2 concentrations (350 and 500 μL L–1) in controlled environment chambers in the UK. Each of the four resource types (shoots or roots from plants grown in elevated or ambient CO2 concentrations) was subsequently placed in an experiment simulating aspects of environmental change in each Arctic ecosystem. Air, litter and soil temperatures were increased using open‐topped polythene tents at both sites, and a 58% increase in summer precipitation was simulated at the high Arctic site.