陈琤^1,2, 张贵文^1,2,3, 陆滢^1,2, 徐振⁴, 刘玉虹^1,2,4
1.河海大学, 环境学院, 江苏 南京 210098;2.浅水湖泊综合治理与资源开发教育部重点实验室, 江苏 南京 210098;3.内蒙古大学, 生态与环境学院, 内蒙古 呼和浩特 010021;4.国电环境保护研究院有限公司, 江苏 南京 210046

摘要:
为了研究滩涂湿地植物枯落物分解状况与温度的响应关系，基于系统动力学的原理，采用STELLA软件构建了盐地碱蓬（Suaeda salsa）种群生长与分解模型，对比了盐地碱蓬生物量与枯落物生物量的年变化过程，并解析了不同温度（原始温度、升温2.5℃、5℃）与植物枯落物分解状况的关系。模型结果表明，盐地碱蓬生物量与枯落物生物量年变化过程有显著差异，地上和地下生物量年变化过程为快速增长-稳定不变-快速减少，地上、地下枯落物生物量年变化过程为下降-急速上升-下降；温度升高会导致枯落物生物量增加和分解量降低，从而增加枯落物有机质量，使碳释放量减少。本研究揭示了在全球变暖的大环境下，滨海湿地植物枯落物分解变化情况，有助于深入了解滨海湿地植被在碳源汇过程中的作用。
关键词:莱州湾滨海湿地盐地碱蓬(Suaeda salsa)STELLA软件分解率
DOI：10.11759/hykx20190120003
分类号:Q141
基金项目:江苏省海洋科技创新专项（HY2018-1）；江苏高校优势学科建设工程资助项目（2016B12014）；河海大学中央高校基本科研业务费专项资金

Studying and simulating the effects of global warming on Suaeda salsa population growth and its litter decomposition in the coastal wetland of the Laizhou Bay
CHEN Cheng^1,2, ZHANG Gui-wen^1,2,3, LU Ying^1,2, XU Zhen⁴, LIU Yu-hong^1,2,4
1.College of Environment, Hohai University, Nanjing 210098, China;2.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, Nanjing 210098, China;3.College of Ecology and Environment, Inner Mongolia University, Huhehaote 010021, China;4.State Power Environmental Protection Research Institute Limited Company, Nanjing 210046, China
Abstract:
Litter decomposition of intertidal wetland plants is related to the environmental temperature. The Suaeda salsa population growth and litter decomposition model was constructed in this study using the STELLA software based on the principle of System Dynamics. The annual biomass of the plants was compared with the litter decomposition within different temperature scenarios (initial temperature, raised by 2.5℃, and 5℃) resolved after simulation. The model results showed that there were significant differences in the annual changes of biomass between the plants and the litter. The trends in annual changes to aboveground and underground biomass were shown as rapid growth (stable and constant) followed by fast-decreased, while the annual changes in the aboveground and underground litter were decline-rapid and rise-decline. The increment in temperature led to the increase of the biomass and decrease of the litter decomposition, which caused the augmentation of litter organic mass and reduction of carbon release. This study has revealed the decomposition and changes that have taken placein plant litter in coastal wetlands in the context of global warming, which has been conducive to the in-depth understanding of the role of coastal wetland vegetation in the process of carbon source and sink.
Key words:the Laizhou Baycoastal wetlandSuaeda salsaSTELLA softwaredecomposition rate





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