2022年5月9日，环境与测绘工程学院姜泉良博士在Elsevier出版集团旗下的期刊Science of the Total Environment（影响因子8.0，中科院环境科学学科SCI期刊分区1区TOP期刊）在线发表了题为“The influence of nutrients on the composition and quantity of buried organic carbon in a eutrophic plateau lake, Southwest China”的研究论文。论文分离出了导致湖泊沉积物中碳埋藏增加的关键因子，并定量表征了营养盐对碳埋藏关键因子的驱动效果——营养盐化学计量比会影响有机碳埋藏的类型，营养盐绝对浓度会影响特定因子有机碳的埋藏量。

  论文摘要：The regulation of lacustrine organic carbon (OC) burial by nutrient is an outstanding knowledge gap in the current understanding of lake carbon cycles. In this study, we determined how nutrients quantitatively correspond with OC burial using the parallel factor analysis (PARAFAC) method in Dianchi Lake, southwest China. Factors were classified into three types according to their historical sedimentation characteristics: the background factor (BF), response factor (RF), and contingency factor (CF). The BF represented the original OC input combination in the lake and was insensitive to nutrient changes. The RF represented the OC input combination that was induced or promoted by nutrient changes in the lake. The CF represented short-term discontinuous factors in sedimentary history, which may be related to unique historical events. The results indicate that changes in the total nitrogen (TN) to total phosphorus (TP) ratio correlated with changes in the BF contribution; whereas the quantity of OC was mainly correlated with TN. The >90% of OC buried in sediment was quantitatively simulated by BF and RF; the driving effect of RF on OC burial was approximately 13 times higher than that of BF. It was observed that a 1 mg kg−1 increase in TN led to approximately 2.2 units increase in RF contribution in Dianchi Lake, while the BF was insensitive to changes in TN. Thus, changes in lake nutrients may effectively change the composition and quantity of OC buried in lake sediment.

DOI号：https://doi.org/10.1016/j.scitotenv.2022.155726