School of Urban Planning and Design, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, Guangdong, China.
College of Urban and Environment Sciences, Peking University, Beijing, 100871, China.
Environ Sci Pollut Res Int. 2023 Jun;30(30):74691-74708. doi: 10.1007/s11356-023-27816-2. Epub 2023 May 27.
Understanding carbon cycling in blue carbon ecosystems is key to sequestrating more carbon in these ecosystems to mitigate climate change. However, limited information is available on the basic characteristics of publications, research hotspots, research frontiers, and the evolution of topics related to carbon cycling in different blue carbon ecosystems. Here, we conducted bibliometric analysis on carbon cycling in salt marsh, mangrove, and seagrass ecosystems. The results showed that interest in this field has dramatically increased with time, particularly for mangroves. The USA has substantially contributed to the research on all ecosystems. Research hotspots for salt marshes were sedimentation process, carbon sequestration, carbon emissions, lateral carbon exchange, litter decomposition, plant carbon fixation, and carbon sources. In addition, biomass estimation by allometric equations was a hotspot for mangroves, and carbonate cycling and ocean acidification were hotspots for seagrasses. Topics involving energy flow, such as productivity, food webs, and decomposition, were the predominant areas a decade ago. Current research frontiers mainly concentrated on climate change and carbon sequestration for all ecosystems, while methane emission was a common frontier for mangroves and salt marshes. Ecosystem-specific research frontiers included mangrove encroachment for salt marshes, ocean acidification for seagrasses, and aboveground biomass estimation and restoration for mangroves. Future research should expand estimates of lateral carbon exchange and carbonate burial and strengthen the exploration of the impacts of climate change and restoration on blue carbon. Overall, this study provides the research status of carbon cycling in vegetated blue carbon ecosystems, which favors knowledge exchanges for future research.
理解蓝碳生态系统中的碳循环对于在这些生态系统中封存更多的碳以减缓气候变化至关重要。然而，关于不同蓝碳生态系统中碳循环的基础特征、研究热点、研究前沿和主题演变的信息有限。在这里，我们对盐沼、红树林和海草生态系统中的碳循环进行了文献计量分析。结果表明，该领域的研究兴趣随时间显著增加，特别是对红树林而言。美国对所有生态系统的研究都做出了重大贡献。盐沼的研究热点包括沉积过程、碳封存、碳排放、侧向碳交换、凋落物分解、植物碳固定和碳源。此外，通过比方程估算生物量是红树林的一个热点，而碳酸盐循环和海洋酸化则是海草的热点。涉及能量流动的主题，如生产力、食物网和分解，是十年前的主要领域。目前的研究前沿主要集中在所有生态系统的气候变化和碳封存上，而甲烷排放是红树林和盐沼的共同前沿。特定于生态系统的研究前沿包括盐沼的红树林入侵、海草的海洋酸化，以及红树林的地上生物量估算和恢复。未来的研究应该扩大对侧向碳交换和碳酸盐埋藏的估计，并加强对气候变化和恢复对蓝碳影响的探索。总的来说，本研究提供了植被蓝碳生态系统中碳循环的研究现状，有利于未来研究的知识交流。
