Intensive field sampling increases the known extent of carbon-rich Amazonian peatland pole forests
Intensive field sampling increases the known extent of carbon-rich Amazonian peatland pole forests
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密集的实地采样增加了亚马逊泥炭地极地森林富含碳的已知范围
DOI：
10.1088/1748-9326/ac0e65
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发表时间：
2021
影响因子：
6.7
通讯作者：
Honorio Coronado E
中科院分区：
文献类型：
--
作者：
Honorio Coronado E
泥炭地极点森林是亚马逊河流域碳密度最高的生态系统，但其空间分布和物种组成知之甚少。为了解决这一知识差距，我们量化的植物区系组成的变化，泥炭厚度，和存储在地上和地下的102个森林地块和53个样带在北方秘鲁亚马逊。这个大型数据集包括六种生态系统类型的571个泥炭厚度测量地面参考点。这些实地数据还被用来根据使用随机森林分类的多种卫星产品生成新的土地覆盖分类。泥炭地极点森林的植物区系特征独特，主要是细茎木本物种，如Pachira nitida（锦葵科），Platycarpum loretense（茜草科）和Hevea guianensis（大戟科）。与此相反，棕榈沼泽和开放泥炭地占主导地位的flexuosa（槟榔科）。泥炭地极林的泥炭厚度（274 ± 22 cm，平均值± 95% CI，n= 184）与开放泥炭地（282 ± 46 cm，n= 46）相似，但大于棕榈沼泽（161 ± 17 cm，n= 220）和季节性水淹林、陆地固定林和白色沙地森林，这些森林中泥炭稀少或不存在。因此，泥炭地极点森林具有特殊的碳密度（1，133 ± 93 Mg C ha−1）。这些新地点将Pastaza-Marañón前陆盆地内已知的泥炭地极森林分布范围扩大了61%，主要是在Tigre河沿岸，在秘鲁亚马逊河北方总共覆盖了7540平方公里。然而，只有15%的极地森林面积在保护区内，另有26%位于土著领土内。目前的保护水平低，森林退化，但铺路项目的威胁很大，因此提格雷河流域是保护的优先事项。泥炭地极地森林的长期养护有可能对减轻气候变化的国际承诺作出重大贡献。
Peatland pole forest is the most carbon-dense ecosystem in Amazonia, but its spatial distribution and species composition are poorly known. To address this knowledge gap, we quantified variation in the floristic composition, peat thickness, and the amount of carbon stored above and below ground of 102 forest plots and 53 transects in northern Peruvian Amazonia. This large dataset includes 571 ground reference points of peat thickness measurements across six ecosystem types. These field data were also used to generate a new land-cover classification based on multiple satellite products using a random forest classification. Peatland pole forests are floristically distinctive and dominated by thin-stemmed woody species such asPachira nitida(Malvaceae),Platycarpum loretense(Rubiaceae), andHevea guianensis(Euphorbiaceae). In contrast, palm swamps and open peatlands are dominated byMauritia flexuosa(Arecaceae). Peatland pole forests have high peat thickness (274 ± 22 cm, mean ± 95% CI,n= 184) similar to open peatlands (282 ± 46 cm,n= 46), but greater than palm swamps (161 ± 17 cm,n= 220) and seasonally-flooded forest, terra firme, and white-sand forest where peat is rare or absent. As a result, peatland pole forest has exceptional carbon density (1,133 ± 93 Mg C ha−1). The new sites expand the known distribution of peatland pole forest by 61% within the Pastaza-Marañón Foreland basin, mainly alongside the Tigre river, to cover a total of 7540 km2in northern Peruvian Amazonia. However, only 15% of the pole forest area is within a protected area, whilst an additional 26% lies within indigenous territories. The current low levels of protection and forest degradation but high threat from road paving projects makes the Tigre river basin a priority for conservation. The long-term conservation of peatland pole forests has the potential to make a large contribution towards international commitments to mitigate climate change.
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发表时间：
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