Peatland carbon stocks and accumulation rates in the Ecuadorian paramo
Peatland carbon stocks and accumulation rates in the Ecuadorian paramo
复制标题
DOI：
10.1007/s11273-016-9482-2
复制
发表时间：
2016-04-01
影响因子：
1.8
通讯作者：
Chimner, Rodney A.
中科院分区：
文献类型：
--
作者：
Hribljan, John A.;Suarez, Esteban;Chimner, Rodney A.
帕拉莫是一个高海拔的热带安第斯生态系统，包括泥炭地和厚厚的碳(C)密集的土壤。土壤C的数据在大多数的paramo中是稀疏的，特别是在泥炭地，这限制了我们提供准确的区域和全国范围内的C储量估计的能力。因此，我们的研究目的是量化厄瓜多尔东北部两个地区的超级泥炭地土壤中的地下碳储量和积累速率。泥炭地土壤岩心采集自Antisana生态保护区和Cayambe-Coca国家公园。我们测量了土壤C密度和C-14日期来估计土壤积累速率。两个地区的泥炭地土壤平均深度为3.8 m，估计平均碳储量为1282 Mg ha（-1）。大于3000 cal. year BP的泥炭地的平均长期碳积累速率为26 g m（-2）年（-1），小于500 cal. year BP的泥炭地的平均近期碳积累速率为134 g m（-2）年（-1）。这些泥炭地还接受了大量矿物物质的输入，主要来自火山沉积，形成了许多互层的非泥炭矿物土壤层，其中含有48%的土壤C。由于厄瓜多尔山地泥炭地的碳储量很大，而且土地利用和气候变化可能会对其造成干扰，因此需要进行更多的研究，以提供基本的基线评估和安第斯山脉碳储量的估计。
The paramo is a high altitude tropical Andean ecosystem that contains peatlands with thick horizons of carbon (C) dense soils. Soil C data are sparse for most of the paramo, especially in peatlands, which limits our ability to provide accurate regional and country wide estimates of C storage. Therefore, the objective of our research was to quantify belowground C stocks and accumulation rates in paramo peatland soils in two regions of northeastern Ecuador. Peatland soil cores were collected from Antisana Ecological Reserve and Cayambe-Coca National Park. We measured soil C densities and C-14 dates to estimate soil accumulation rates. The mean peatland soil depth across both regions was 3.8 m and contained an estimated mean C storage of 1282 Mg ha(-1). Peatlands older than 3000 cal. year BP had a mean long-term C accumulation rate of 26 g m(-2) year(-1), with peatlands younger than 500 cal. year BP displaying mean recent rates of C accumulation of 134 g m(-2) year(-1). These peatlands also receive large inputs of mineral material, predominantly from volcanic deposition, that has created many interbedded non-peat mineral soil horizons that contained 48 % of the soil C. Because of large C stocks in Ecuadorian mountain peatlands and the potential disturbance from land use and climate change, additional studies are need to provide essential baseline assessments and estimates of C storage in the Andes.