Emergy and eco-exergy evaluation of four forest restoration modes in southeast China
Emergy and eco-exergy evaluation of four forest restoration modes in southeast China
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DOI：
10.1016/j.ecoleng.2010.11.003
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发表时间：
2011-02
影响因子：
3.8
通讯作者：
Hongfang Lu;Zhixiu Wang;D. Campbell;H. Ren;Jiuqiang Wang
中科院分区：
文献类型：
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作者：
Hongfang Lu;Zhixiu Wang;D. Campbell;H. Ren;Jiuqiang Wang
利用能量系统理论和能值综合方法，对四种不同的森林恢复模式（相思人工林、混交林、针叶林和桉树人工林）进行了评价。此外，计算了四种森林恢复模式的生态能值，并结合能值和赋能密度，探讨了四种森林恢复模式的恢复效率和自组织效率。结果表明：2种外来种人工林（尤其是相思人工林）对生物量积累和土壤改良效果最好，而2种本地种人工林（尤其是混合本地种人工林）对有效资源的捕获效果更好。变换性是评价系统效率的重要能值指标，因为它同时考虑了投入和产出。在亚热带人工林中，乔木主要贡献生态能，而草本和灌木主要贡献特定生态能。本研究中针叶树种确实存在c值悖论，并可能影响生态能评价。生态能和能分析的联合应用有助于比较不同类型和相似类型的生态系统。
Four different forest restoration modes (Acacia mangium plantation, mixed-native species plantation, conifer plantation and Eucalyptus plantation) were evaluated using Energy System Theory and the emergy synthesis method. In addition, the eco-exergies of the four forest restoration modes were calculated, and combined with emergy and empower density to explore the restoration and self-organization efficiencies of these modes. The results showed that the two plantations of exotic species, especially the Acacia mangium plantation, were best for biomass accumulation and soil improvement, whereas the two plantations of native species, especially the mixed-native plantation, were more efficient in capturing the available natural resources. Transformity is an important emergy index for the evaluation of system efficiency, because it takes both input and output into account. In subtropical plantations, trees mainly contribute to eco-exergy, whereas herbs and shrubs mainly contribute to specific eco-exergy. The c-value Paradox does exist in conifer species in this study, and it could affect the eco-exergy evaluation. The joint use of eco-exergy and emergy analysis is helpful in comparing both different and similar kinds of ecosystems.