| 1 | 生物载体对海底冷泉-热液极端环境的地球化学记录显示文摘海底冷泉-热液极端环境是岩石圈与外部圈层进行物质交换和能量流动的主要窗口,其独特的地质条件和营养模式孕育了繁茂的生物群落和生态系统。由于多种因素的叠加控制,海底极端环境的理化性质通常变化频繁且剧烈。大量研究表明,这种变化或波动又能不同程度地被环境中生存的生物记录下来,因此,生物所保留下来的某些地球化学信息具有恢复重建其生存环境变化的潜在能力,这对人类目前尚难自由出入的深海极端环境的探索尤为重要。本文从海底极端环境生物种类和空间分布、生物壳体的地球化学信息、生物元素和同位素地球化学指标以及生物有机生标等几方面出发,探讨当前科学家关注的典型地球化学指标对沉积环境的记录应用,并展望了未来需要进一步加强研究的几个方面,希望借此能引起广大研究者对该领域的兴趣和重视,以加深加快对海底极端环境内运行规律和影响的认识。 | 李鑫 曹红 孙治雷 耿威 张喜林 徐翠玲 吴能友 闫大伟 秦双双 张现荣 翟滨 王利波 | 2021 | 海洋地质与第四纪地质2021，41，6： | 0 |
| 2 | Characteristics of dissolved sugars in the Southern Yap Trench from sea surface to hadal zone显示文摘2,4,6-Tripyridine-s-triazine(TPTZ)spectrophotometric method was applied to determine the concentrations of dissolved monosaccharides(MCHO),polysaccharides(PCHO),and total carbohydrate(TCHO)in seawater samples collected from sea surface to hadal zone and sediment-seawater interface of the Southern Yap Trench in the Western Pacific Ocean.Results show that the concentrations of MCHO,PCHO,and TCHO ranged from 6.3 to 22.3μmol C/L,1.1 to 25.4μmol C/L,and 12.1 to 44.9μmol C/L,respectively,from the euphotic layer to the hadal zone of the trench.At different sampling stations,the concentrations of MCHO,PCHO,and TCHO in the seawater showed complex vertical variation characteristics,but the overall variation trends were decreasing with water depth.In the Southern Yap Trench,the maximum concentration of MCHO in the seawater appeared in the euphotic layer,and the minimum in the hadal zone.The maximum concentration of PCHO appeared in the euphotic layer,and the minimum in the bathypelagic layer.The water layer where the maxima and minima of the average concentration of TCHO appeared was consistent with that of PCHO.PCHO was the major component of TCHO in the seawater of the Southern Yap Trench.In the seawater from the sediment-seawater interface,the concentrations of MCHO,PCHO,and TCHO ranged from 8.4 to 10.6μmol C/L,3.8 to 5.8μmol C/L,and 12.2 to 15.2μmol C/L,respectively,and MCHO was the major component of TCHO.The key factors affecting the concentration and existing forms of dissolved sugars in the seawater of the Southern Yap Trench included photosynthesis,respiration,polysaccharide hydrolysis,adsorption and desorption of particulate matter,trench“funnel effect”,deep ocean currents,sediment resuspension,and etc.This study provided fundamental data about labile organic matter in abyss and hadal zone of marine environment,which is significant for further understanding of deep-sea organic carbon cycle. | Dong CUI Chengjun SUN Chaonan GUO Wei CAO Fenghua JIANG Haibing DING | 2023 | Journal of Oceanology and Limnology2023，41，6： | 0 |
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