Interactive Effects of Environmental Change and Management Strategies on Regional Forest Carbon Emissions
Interactive Effects of Environmental Change and Management Strategies on Regional Forest Carbon Emissions
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DOI：
10.1021/es402903u
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发表时间：
2013-11-19
影响因子：
11.4
通讯作者：
Law, Beverly E.
中科院分区：
文献类型：
--
作者：
Hudiburg, Tara W.;Luyssaert, Sebastiaan;Law, Beverly E.
森林中的气候缓解活动需要从对森林碳储量、积累和排放的长期影响方面进行量化。未来环境变化和生物能源收获对区域森林碳储存的影响尚未量化。我们进行了全面的建模研究和生命周期评估的影响，预计气候变化，CO2浓度，氮沉降，区域范围内的森林管理政策对区域森林碳通量。到2100年，如果目前的管理策略继续下去，那么在给定的预测中，变暖和CO2施肥效应将导致净碳吸收增加32-68%，掩盖了火灾活动和其他森林干扰因素预测增加的碳排放量。为了测试对新的采伐战略的反应，在易受火灾影响的地区进行了多次间伐，以减少死亡率，在生产性森林中进行了两次皆伐轮伐，以提供用于木材产品和生物能源的生物量。这里研究的管理策略导致长期增加碳排放量比目前的收获做法，虽然半干旱地区的贡献不大。收获率是不可持续的。这一综合办法可作为对管理对其他地点森林今后固碳作用的影响进行区域实地评估的基础。
Climate mitigation activities in forests need to be quantified in terms of the long-term effects on forest carbon stocks, accumulation, and emissions. The impacts of future environmental change and bioenergy harvests on regional forest carbon storage have not been quantified. We conducted a comprehensive modeling study and life-cycle assessment of the impacts of projected changes in climate, CO2 concentration, and N deposition, and region-wide forest management policies on regional forest carbon fluxes. By 2100, if current management strategies continue, then the warming and CO2 fertilization effect in the given projections result in a 32-68% increase in net carbon uptake, overshadowing increased carbon emissions from projected increases in fire activity and other forest disturbance factors. To test the response to new harvesting strategies, repeated thinnings were applied in areas susceptible to fire to reduce mortality, and two clear-cut rotations were applied in productive forests to provide biomass for wood products and bioenergy. The management strategies examined here lead to long-term increased carbon emissions over current harvesting practices, although semiarid regions contribute little to the increase. The harvest rates were unsustainable. This comprehensive approach could serve as a foundation for regional place-based assessments of management effects on future carbon sequestration by forests in other locations.