球囊霉素在红树林湿地生态系统中的碳汇功能和示踪效应

Glomalin-related soil protein(GRSP) a stable glycoprotein produced by arbuscular mycorrhizal (AM) fungiand plays important rolesin carbon sequestration andstorage, soil structure improvement and material transport tracing. Mangrove ecosystems have high potential for carbon sinks and microbial diversity, and regulation of the global carbon cycle. The potential of high carbon sequestration and microbial diversity in mangrove ecosystems and the regulation of the global carbon cycle are also hot topics in the international scientific frontier of the formation and control mechanisms of sea and land carbon sequestration.The currentproject will use multidisciplinary (morphology, molecular biology and biogeochemistry, etc.) research methods, tools and measures to study GRSP carbon sink functions and tracer effect in mangrove wetland ecosystems. Combining field surveys and laboratory control experiments,we will reveal thespatial distribution of GRSP in mangrove ecosystems as well as its ability to sequester and store carbon, and will assess indicator function for the conversion of carbon sources and sinks in mangrove forests; we will also elucidate the carbon transferring function of the indigenous AM fungi in mangrove wetland ecosystems and reveal the potential of the AM fungi to store carbon in the form of GRSP. By analyzing GRSP adsorption and sequestration of terrigenous elements and searching micro-organism with terrestrial organic matter (GRSP) as carbon source, a transport model based on GRSP will be constructed to reflect the dynamics of terrigenous nutrient transmission, to evaluate and predict the potential impact of terrestrial nutrients on marine microbial carbon pump.Based onthe analyses of GRSPcarbon sink size, this project will provide new ideas and scientific support in understanding the mangrove carbon sink function and tracing of terrestrial material transport.

球囊霉素相关土壤蛋白（GRSP）是由丛枝菌根（AM）真菌产生的一种稳定糖蛋白，在生态系统的固/储碳、土壤结构改善以及物质传输示踪中发挥着重要作用。红树林湿地的高碳汇潜力和微生物多样性及调控全球碳循环的功能是目前海陆碳汇形成过程与调控机制这一科学前沿问题中的热点。项目拟采用形态学、分子生物学及地球化学等学科的研究方法、手段与措施研究GRSP在红树林生态系统中的碳汇功能和示踪效应。野外和室内比对研究，阐明GRSP在红树林生态系统中的空间分布、固/储碳能力和碳的源汇转换的指示作用；揭示红树林系统中优势土著AM真菌的碳转运功能和以GRSP形式储碳潜力；分析GRSP对陆源元素吸附固定能力并挖掘以陆源有机质GRSP为碳源的微生物，构建以GRSP为媒介的迁移模型，反馈陆源营养盐传输动态，评估并预测陆源营养盐对海洋微型生物碳泵的潜在影响。为全面揭示红树林碳汇潜力及示踪陆源物质传输提供新的研究思路和理论支撑

球囊霉素相关土壤蛋白（GRSP）在生态系统的固/储碳、土壤结构改善以及物质传输示踪中发挥着重要作用的特征，项目采用形态学、分子生物学及地球化学等学科的研究方法、手段与措施研究完成了球囊霉素相关土壤蛋白(GRSP)δ13C和δ15N的空间特征，典型流域沉积物中的空间分布以及与重金属的结合及沉积物中重金属的健康风险评估及 GRSP 对金属的缓解作用，红树林沉积物中GRSP结合的金属在相关水禽体内的释放，从光谱学技术和分子角度解析GRSP固定重金属的机制。阐明了GRSP在红树林生态系统中的空间分布、固/储碳能力和碳的源汇转换的指示作用；分析了GRSP对陆源元素吸附固定能力，评估并预测了陆源营养盐对海洋微型生物碳泵的潜在影响。为全面揭示红树林碳汇潜力及示踪陆源物质传输提供了新的研究思路和理论支撑。