Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea; Institute of Life Science and Natural Resources, Korea University, Seoul 02841, Republic of Korea.
Department of Soil Science and Ecology, Faculty of Forestry, Istanbul University, Bahcekoy 34473, Istanbul, Turkey.
Sci Total Environ. 2018 Nov 1;640-641:400-405. doi: 10.1016/j.scitotenv.2018.05.341. Epub 2018 Jun 1.
A significant area of the oak forests in Turkey has been historically managed by short-rotation coppicing for wood production. Coppice management was almost abandoned in Turkey in 2006 and so investigating its impact on forest carbon (C) sequestration has become an important issue. Therefore, we investigated the net effect of this change in management on C sequestration by oak forests in Turkey using field measurement data and a forest C model (Forest Biomass and Dead organic matter Carbon (FBDC) model). The FBDC model estimated the annual forest C dynamics and considered the effect of the substitution of wood for fossil fuels under two management scenarios over a 100-year period: (1) abandoning coppice (no management) and (2) continuing coppice (20-year-interval harvest). The field measurement data were used to parameterize the FBDC model to the study sites and to verify the simulated C stocks. Continuing coppice management constrained an increase in the C stocks (116.0-140.3 Mg C ha) and showed a mean annual C sequestration of 0.6 Mg C ha yr if wood was substituted for fossil fuels. In contrast, abandoning coppicing practices increased the level of forest C stocks (128.1-236.2 Mg C ha), enhancing the mean annual C sequestration to 1.1 Mg C ha yr. Accordingly, the abandonment of coppice management increased the mean annual C sequestration by 0.5 Mg C ha yr in the long-term. However, sensitivity analysis showed a possibility of a larger difference in C sequestration between the two scenarios due to a decrease in the stand productivity by repeated coppices and a high likelihood of a lower substitution effect. The verification supported the scientific reliability of the simulation results. Our study can provide a scientific basis for enhancing C sequestration in coppice forests.
土耳其历史上有很大一部分橡树森林通过短轮伐期矮林作业来进行木材生产。2006 年，土耳其几乎放弃了这种矮林作业管理方式，因此，研究其对森林碳（C）固存的影响已成为一个重要问题。因此，我们使用野外测量数据和森林 C 模型（森林生物量和死亡有机物质 C（FBDC）模型）来研究这种管理方式变化对土耳其橡树森林 C 固存的净效应。FBDC 模型估计了森林 C 的年动态，并考虑了在 100 年内两种管理情景下用木材替代化石燃料的效应：（1）放弃矮林（无管理）和（2）继续矮林（20 年间隔收获）。野外测量数据用于将 FBDC 模型参数化到研究地点，并验证模拟的 C 储量。继续矮林作业管理限制了 C 储量的增加（116.0-140.3 Mg C ha），如果用木材替代化石燃料，平均每年的 C 固存量为 0.6 Mg C ha yr。相比之下，放弃矮林作业增加了森林 C 储量水平（128.1-236.2 Mg C ha），平均每年的 C 固存量增加到 1.1 Mg C ha yr。因此，长期来看，放弃矮林管理平均每年增加了 0.5 Mg C ha yr 的 C 固存。然而，敏感性分析表明，由于重复矮林作业导致林分生产力下降和替代效应降低的可能性较高，两个情景之间的 C 固存可能存在较大差异。验证支持了模拟结果的科学可靠性。我们的研究可以为提高矮林森林的 C 固存提供科学依据。
