Development of a carbon calculator tool for riparian forest restoration
Development of a carbon calculator tool for riparian forest restoration
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开发用于河岸森林恢复的碳计算器工具
DOI：
10.1111/avsc.12400
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发表时间：
2018
影响因子：
2.8
通讯作者：
Marrs, Rob
中科院分区：
文献类型：
--
作者：
Matzek, Virginia;Stella, John;Ropion, Pearce;Marrs, Rob
需要采用估算河岸森林生物量固碳的方法，使河岸恢复和养护项目有资格通过碳信用额获得资金。作为一个拟议的会计方法的一部分，加州的总量管制与交易系统，我们描述了五个河岸植被协会，并创建了一个工具来预测他们的碳积累率在不同的恢复和土地利用scenaries. Location加州，美国。MethodsWe组装了一个数据库的654个森林库存地块的已知年龄（3-108年）从重新种植和自然招聘加州河岸林。然后，我们使用去趋势对应分析和凝聚层次聚类检测植被结构的地块和划定不同的森林类型。我们使用异速生长方程来估计生物量从个别树木的直径和计算总生物量为每个小区。接下来，我们将S形生长函数拟合到地块生物量数据中，以生成每种森林类型100年内活树生物量的预期值。最后，我们创建了一个算法，以匹配用户输入的数据与一个查找表，预测碳积累适当的用户的scenario.ResultsCalifornia河岸植被分为杨柳灌丛，棉白杨，杨柳，混合河岸，高地河岸和河岸林地类型的一个预定的恢复项目。河岸植被和土壤的总固碳量在恢复后30年为75.7至137.4 Mg C/ha，在林分形成后100年为95.1至175.8 Mg C/ha。由更高、更耐荫的树木主导的植被类型比灌木和先锋林发展得更慢，但最大生物量更高。我们的模型把河岸生物量积累的范围内的几个现存的文献值为地中海系统，但不确定性很高，土壤碳可能被低估.ConclusionsOur的工作流程和方法应转移到碳核算工具的发展为任何其他木本植被类型。然而，我们很难找到适当的公布的数据进行分析表明，迫切需要进行实地调查，适当的生物量估计在林地和森林社区不开发木材。最重要的测量是林分的年龄和树种、高度和直径的普查。
Aim(s)Methods for estimating carbon sequestration in riparian forest biomass are needed to qualify riparian restoration and conservation projects for funding through carbon credits. As part of a proposed accounting methodology for California's cap‐and‐trade system, we described five riparian vegetation associations and created a tool to predict their rates of carbon accumulation under different restoration and land‐use scenarios.LocationCalifornia, USA.MethodsWe assembled a database of 654 forest inventory plots of known age (3–108 years) from replanted and naturally recruiting California riparian forests. We then used detrended correspondence analysis and agglomerative hierarchical clustering to detect vegetation structure in the plots and delineate distinct forest types. We used allometric equations to estimate biomass from individual trees’ diameters and calculate total biomass for each plot. Next, we fitted sigmoid growth functions to the plot biomass data to generate expected values for live‐tree biomass over a 100‐year period for each forest type. Finally, we created an algorithm to match user‐inputted data for an intended restoration project with a look‐up table that predicts carbon accumulation appropriate to the user's scenario.ResultsCalifornia riparian vegetation was divided into willow scrub, cottonwood–willow, mixed riparian, upland riparian and riparian woodland types. Total carbon sequestration in riparian vegetation and soil varied from 75.7 to 137.4 Mg C/ha at 30 years post‐restoration and from 95.1 to 175.8 Mg C/ha 100 years after stand initiation. Vegetation types dominated by taller, more shade‐tolerant trees developed more slowly than scrubby and pioneer stands, but came to a higher maximum biomass. Our models put riparian biomass accumulation in the range of the few extant literature values for mediterranean systems, but uncertainties are high, and soil carbon may be underestimated.ConclusionsOur workflow and methods should be transferable to the development of carbon accounting tools for any other woody vegetation type. However, our difficulty in finding appropriate published data for the analysis suggests a critical need for field surveys appropriate to biomass estimation in woodland and forest communities not exploited for timber. The most important measurements are the age of the stand and a census of tree species, height and diameter.
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