A free-air CO2 enrichment experiment exposed a 180-year-old oak forest in central England to elevated atmospheric CO2 concentrations for 7 years. Increases in wood production and net primary productivity were observed in response to this CO2 enrichment, contrary to expectations that such responses are limited to young tree plantations.

中文翻译：

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成熟的橡树林保留了年轻森林对二氧化碳浓度升高的反应能力


一项自由空气二氧化碳富集实验将英格兰中部一片拥有 180 年历史的橡树林暴露在大气二氧化碳浓度升高的环境中长达 7 年。观察到木材产量和净初级生产力的增加是对二氧化碳浓度增加的反应，这与这种反应仅限于幼树种植园的预期相反。