Carbon Concentrations and Carbon Pool Distributions in Dry, Moist, and Cold Mid-Aged Forests of the Rocky Mountains
Carbon Concentrations and Carbon Pool Distributions in Dry, Moist, and Cold Mid-Aged Forests of the Rocky Mountains
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落基山脉干燥、潮湿和寒冷中龄林的碳浓度和碳库分布
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发表时间：
2010
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通讯作者：
D. L. Adams
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作者：
Theresa B Jain;R. Graham;D. L. Adams
虽然“碳”管理可能不是森林管理的主要目标，但影响生物量的分布、组成、生长和发展以实现多个目标；因此，在气候变化的情况下，管理碳可能会影响未来的管理决策。此外，通常情况下，总生物量到总碳的转化率为50%；然而，我们认为这个值在所有森林组成部分中并不一致。因此，这项研究的目标是：了解美国落基山脉四种不同气候类型(干燥(亚利桑那州)、寒冷(蒙大拿州)和潮湿(爱达荷州))的栖息地的适当碳浓度和碳库分布，并提供更好的碳含量估计。我们量化了树木、土壤、木质碎屑以及粗根和细根的生物量、碳浓度和碳量。我们发现，在大多数情况下，我们的碳浓度低于50%的典型转化率。因此，我们建议从生物量到碳的转换如下：乔木的覆盖率应为49%，树干应为48%，林下树应为48%，粗根为47%；林下植物的浓度应为灌木47%，杂草41%；木质残留物应为实木48%，腐木49%，棕色立方腐木48%，埋藏木材44%；黄松林球果应为48%，冷湿森林中应为46%；黄松林中的球果应为49%，在潮湿和寒冷的气候条件下，球果应为47%。独特的碳库经常被忽视，包括球果、木质碎片和埋藏的木头。鉴于这些结果，可以继续探讨更多的研究问题，例如演替阶段对碳库分布的影响，或随着森林的生长和发展，碳浓度是否发生变化，或者生物量分布是否随着时间的推移而发生变化。
Although "carbon" management may not be a primary objective in forest management, influencing the distribution, composition, growth, and development of biomass to fulfill multiple objectives is; therefore, given a changing climate, managing carbon could influence future management decisions. Also, typically, the conversion from total biomass to total carbon is 50 percent; however, we believe this value is not consistent across all forest components. Therefore, the objectives of this study are to: acknowledge the appropriate carbon concentrations and distribution of carbon pools and provide improved estimates of carbon content in four habitat types with different climatic regimes—(dry (Arizona), cold (Montana), and moist (Idaho)—of the Rocky Mountains, USA. We quantified biomass, carbon concentrations, and carbon amounts for trees, soils, woody debris, and coarse and fine roots. We found that in most cases our carbon concentrations were less than the typical conversion of 50 percent. Thus we recommend the following conversions from biomass to carbon: trees should be 49 percent for overstory crown, 48 percent for boles, 48 percent for understory trees, and 47 percent for coarse roots; for understory plants concentrations should be 47 percent for shrubs and 41 percent for forbs and grasses; woody residue should be 48 percent for solid logs, 49 percent for rotten logs, 48 percent for brown cubi- cal rotten wood, and 44 percent for buried wood; cones should be 48 percent in ponderosa pine forests and 46 percent in cold and moist forests; sticks in ponderosa pine forests should be 49 percent and in the moist and cold climate regimes sticks should be 47 percent. Unique carbon pools often overlooked include cones, woody debris, and buried wood. Given these results, additional research questions could be pursued, such as the effect of successional stage on carbon pool distributions, or as forests grow and develop, if carbon concentrations change or if only biomass distribution changes over time.