Siriwardana Hasitha, Samarasekara R S M, Anthony Damsara, Vithanage Meththika
Faculty of Engineering, University of Sri Jayewardenepura, 41, Lumbini Avenue, Ratmalana 10390, Sri Lanka.
Department of Civil Engineering, Faculty of Engineering, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka.
Heliyon. 2024 Mar 21;10(7):e28182. doi: 10.1016/j.heliyon.2024.e28182. eCollection 2024 Apr 15.
Nitrogen and phosphorus concentrations in oceans have been extensively studied, and advancements in associated disciplines have rapidly progressed, enabling the exploration of novel and previously challenging questions. A keyword analysis was conducted using the Scopus database to examine chronological trends and hotspots, offering comprehensive insights into the evolution of marine nitrogen and phosphorus research. For this purpose, author keyword networks were developed for the periods before 1990, 1990 to 2000, 2001 to 2011, and 2012 to 2022. Furthermore, analytical techniques employed in the recent decade to determine nitrogen and phosphorus concentrations in seawater were assessed for their applicability and limitations through a critical review of more than 50 journal articles. Taxonomy and nitrogen biogeochemistry were the prominent research interests for the first two periods, respectively, while stable isotopic tracking of nitrogen and phosphorus processes emerged as the dominant research focus for the last two decades. The integration of macroeconomic factors in research development and the chronological rise of interdisciplinary research were identified. Conventional analytical techniques such as spectrophotometry, colorimetry, fluorometry, and elemental analysis were noted, along with emerging techniques like remote sensing and microfluidic sensors.
海洋中的氮和磷浓度已得到广泛研究，相关学科也取得了迅速进展，使得人们能够探索新的和以前具有挑战性的问题。利用Scopus数据库进行了关键词分析，以研究时间趋势和热点，从而全面洞察海洋氮和磷研究的演变。为此，分别针对1990年之前、1990年至2000年、2001年至2011年以及2012年至2022年这几个时间段构建了作者关键词网络。此外，通过对50多篇期刊文章的批判性综述，评估了近十年用于测定海水中氮和磷浓度的分析技术的适用性和局限性。在前两个时期，分类学和氮生物地球化学分别是突出的研究兴趣点，而在过去二十年中，氮和磷过程的稳定同位素追踪成为主要研究重点。研究发现了宏观经济因素在研究发展中的整合以及跨学科研究的逐年兴起。文中提到了传统分析技术，如分光光度法、比色法、荧光法和元素分析，以及遥感和微流控传感器等新兴技术。
