Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru; Departamento de Ingeniería, Facultad de Ciencias y Filosofía (FACIEN), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru.
Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru.
Mar Pollut Bull. 2022 Aug;181:113948. doi: 10.1016/j.marpolbul.2022.113948. Epub 2022 Jul 18.
This research assessed carbon and nutrient burial during the past ~60 years within a Peruvian coastal marsh ecosystem affected by anthropogenic activities, by examining total organic carbon (TOC), total nitrogen (TN) and isotopes (δC and δN) tracers in two dated sediment cores. Significantly higher TOC and TN burial, up to 416.4 ± 65.0 and 0.7 ± 0.1 g m year respectively, were observed after an uncontrolled urban expansion starting in the early 1970's to the 1990's. The TOC and TN burial rates were up to twofold higher than those observed for preserved coastal marshes. Furthermore, the decreased δC values (-16.1 ± 0.6 ‰) and increasing δN values (+10.6 ± 2.6 ‰) indicate higher deposition of algal material and urban sewage during the same period. The higher burial rates during 1970's-1990's and reduced rates thereafter evidenced the role of coastal marsh ecosystems plays in sequestering carbon and nutrients.
本研究通过对两个有年代的沉积物岩芯中总有机碳（TOC）、总氮（TN）和同位素（δC 和 δN）示踪剂的检测，评估了过去 60 年来秘鲁沿海沼泽生态系统中受人为活动影响的碳和养分埋藏情况。自 20 世纪 70 年代初至 90 年代，在不受控制的城市扩张之后，观察到 TOC 和 TN 的埋藏量显著增加，最高可达 416.4 ± 65.0 和 0.7 ± 0.1 g m 年 。TOC 和 TN 的埋藏速率比保存完好的沿海沼泽高出两倍。此外，δC 值的降低（-16.1 ± 0.6‰）和 δN 值的增加（+10.6 ± 2.6‰）表明，在同一时期，藻类物质和城市污水的沉积量有所增加。1970 年代至 1990 年代期间埋藏率较高，此后降低，这表明沿海沼泽生态系统在固碳和养分方面发挥了作用。
