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本文基于简化的CASA模型,研究1992~2012年间东北地区主要森林植被的NPP时空动态特征,这不但是今后东北地区森林生态系统的碳平衡研究基础,而且对全球气候变化也起着重要的作用。结果表明:1992~2012年间落叶针叶林的年均NPP值为358.7gC m-2a-1、落叶阔叶林的年均NPP值为424.99gC m-2a-1。总体来说,21年来落叶针叶林和落叶阔叶林的NPP呈现递增趋势;落叶针叶林NPP空间动态特征是整体分布上从东南向西北呈现出递增趋势,集中分布在大小兴安岭山区。落叶阔叶林NPP空间动态特征是整体分布上从西北向东南呈现出递增趋势,集中分布在长白山地区及辽东半岛。
Based on the simplified CASA model, this paper studies the spatio-temporal dynamics of NPP of main forest vegetation in northeastern China from 1992 to 2012, which is not only the basis of carbon balance study of forest ecosystems in northeast China, but also plays an important role in global climate change. The results showed that the average NPP of deciduous coniferous forest was 358.7gC m-2a-1 from 1992 to 2012, and the average NPP of deciduous broad-leaved forest was 424.99gC m-2a-1. Generally speaking, the NPP of deciduous coniferous forest and deciduous broad-leaved forest increased gradually in 21 years. The NPP spatial dynamic characteristics of deciduous coniferous forest showed an increasing trend from southeast to northwest in the whole distribution and concentrated in the mountainous areas of Xinguang Mountain. The spatial distribution of NPP in deciduous broad-leaved forests shows an increasing trend from northwest to southeast in the whole distribution, concentrated in Changbai Mountain area and Liaodong Peninsula.