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首页> 外文期刊>Open Journal of Ecology >Net primary production and carbon cycling in coast redwood forests of central California
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Net primary production and carbon cycling in coast redwood forests of central California

机译：加利福尼亚中部沿海红木森林的净初级生产和碳循环

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摘要

A simulation model to estimate net primary productivity (NPP) has been combined with in situ measurements of soil carbon dioxide (CO2) emissions and leaf litter pools in three coast redwood forest stands on the central California coast. Monthly NPP was predicted from the CASA model using 250-meter resolution vegetation index (VI) inputs. Annual NPP was predicted to vary from 380 g·C·m-2·yr-1 to 648 g·C·m-2·yr-1 at central coast redwood sites over the years 2007 to 2010. Measured soil respiration rates at between 0.5 to 2.2 g·C·m-2·d-1 were slightly below the range of measurements previously reported for a second-growth mixed (redwood and Douglas-fir) conifer forests. Although warm monthly temperatures at the southern-most redwood forest sites evidently results in elevated stress levels to sustained redwood growth into the dry summer months of June and July, these redwood stands appear to sequester CO2 from that atmosphere into forest biomass for a net positive ecosystem carbon balance each year.
机译：在加利福尼亚中部海岸的三个海岸红木林中，结合了估算净初级生产力（NPP）的模拟模型与土壤二氧化碳（CO2）排放量和枯枝落叶池的现场测量相结合。根据CASA模型，使用250米分辨率的植被指数（VI）输入预测了每月NPP。预计2007年至2010年，中部海岸红木站点的年NPP会在380 g·C·m-2·yr-1至648 g·C·m-2·yr-1之间。 0.5至2.2 g·C·m-2·d-1略低于先前报道的第二种混合（红木和花旗松）针叶林的测量范围。尽管最南端的红木林地的月度温暖明显导致压力水平升高，导致红木持续生长到6月和7月的干燥夏季，但这些红木林似乎将二氧化碳从大气中隔离到森林生物量中，形成了净正生态系统每年的碳平衡。

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