Evaluation of biodiversity and carbon flax of coppice woods managed by a short rotation

人们一直认为，通过短时间的轮作来生产燃料的丛林(所谓的沙田山)可以保持高度的生物多样性，并起到碳汇的作用，但到目前为止还没有研究支持这些观点。研究了短轮作条件下灌木林的生物多样性状况和碳循环。不同树龄小班之间的植被异质性增强了生物多样性，定量评价了灌木林随树龄增长的碳通量，并根据生物量增长速率确定了最佳采伐树龄。这些成果将转交给非营利组织和行政机关，作为有效利用灌木林的有用指南。

Coppice woods (so-called satoyama) managed by a short rotation for fuel production have been thought to maintain a high biodiversity and to function as carbon sink, but no studies supporting these views have been available so far. Biodiversity status and carbon cycle in coppice woods under short rotation management were studied. Vegetation heterogeneity among small compartments of different ages enhanced a high biodiversity.Carbon flux along increasing age of coppice woods was quantitatively evaluated, and the best tree age to harvest was determined based on the rate of biomass increase. These results are to be transferred to NPO's and administrative organs as useful guidelines for effective use of coppice woods.