| 1 | Capacity of Old Trees to Respond to Environmental Change显示文摘Atmospheric carbon dioxide CO2 has increased dramatically within the current life spans of long-lived trees and old forests.Consider that a 500-year-old tree in the early twenty-first century has spent 70% of its life growing under pre-industrial levels of CO2,which were 30% lower than current levels.Here we address the question of whether old trees have already responded to the rapid rise in CO2 occurring over the past 150 years.In spite of limited data,aging trees have been shown to possess a substantial capacity for increased net growth after a period of post-maturity growth decline.Observations of renewed growth and physiological function in old trees have,in some instances,coincided with Industrial Age increases in key environmental resources,including CO2,suggesting the potential for continued growth in old trees as a function of continued global climate change. | Nathan G.Phillips Thomas N.Buckley David T.Tissue | 2008 | Journal of Integrative Plant Biology2008，50，11： | 2 |
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