Effects of increased forest productivity and warmer climates on carbon sequestration, run-off water quality and accumulation of dead wood in a boreal landscape: A modelling study
Effects of increased forest productivity and warmer climates on carbon sequestration, run-off water quality and accumulation of dead wood in a boreal landscape: A modelling study
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森林生产力提高和气候变暖对北方景观中碳固存、径流水质和死木积累的影响：建模研究
DOI：
10.1080/02827580903085171
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
B. Sigurdsson
中科院分区：
文献类型：
--
作者：
J. Weslien;L. Finér;J. Á. Jónsson;H. Koivusalo;A. Laurén;T. Ranius;B. Sigurdsson
由于使用转基因植物材料和气候变暖，森林生产力预计将在未来增加。生产力的提高将导致更短的最佳轮作长度和更大的年度砍伐面积。本研究探讨了15种情景（5种生产力水平和3种气候条件）下森林产量增加和气候变暖对：(1)木材产量、(2)碳固存、(3)水质和(4)粗木屑（CWD）数量的可能影响。利用一组生态系统模型，在假设的管理过的北方森林景观中纳入相同的气候和管理情景，模拟了这些影响。假设生产力的提高与轮作长度的比例减少相结合，景观级尺度上的产出简要如下。在每个模拟气候情景中，生产力的提高导致地上和地下碳固存增加，CWD积累减少，但对径流水中溶解总氮（DTN）负荷没有显著影响。此外，在每个模拟生产力水平下，气候变暖导致地下碳固存和CWD量减少，但径流水中DTN含量增加。确定并解释了这些趋势的原因。
Abstract Forest productivity is expected to increase in the future owing to the use of genetically improved plant material and climate warming. Increased productivity will lead to shorter optimum rotation lengths and larger annual clear-cut areas. This study explored the likely effects of increased forest production and a warmer climate in 15 scenarios (five productivity levels and three climate conditions) on: (1) wood production, (2) carbon sequestration, (3) water quality, and (4) amounts of coarse woody debris (CWD). The effects were simulated using a set of ecosystem models incorporating the same climate and management scenarios in a hypothetical managed boreal forest landscape. Under the assumption that increased productivity is coupled to a proportional decrease in rotation length, the outputs at the landscape-level scale were briefly as follows. In each simulated climate scenario, increased productivity resulted in increases in above- and below-ground carbon sequestration, and reduced CWD accumulation, but did not have significant effects on dissolved total nitrogen (DTN) loads in run-off water. In addition, at every simulated productivity level, a warmer climate led to reductions in carbon sequestration below ground and amounts of CWD, but increases in DTN contents in run-off water. Reasons for these trends are identified and explained.