报告题目：氮沉降背景下细根生物量分布及影响因素

报告人：马磊

报告时间：2024年11月3日（周日）下午16:00开始

报告地点：数学楼315会议室

报告摘要：In the present study, we compared fine root biomass under canopy and understory nitrogen (N) addition rates of 0, 25, and 50 kg N ha^-1 yr^-1 in subtropical and temperate forest sites. Canopy and understory N addition decreased the fine root biomass of the subtropical site but increased it of the temperate forest site community during the growing season. The biomass and functional diversity of fine roots are more affected by N addition pattern than rate. The functional richness index of fine roots was negatively correlated with community fine root biomass in subtropical site during the growing season, and NO₃-N in the soil had the highest explanatory power for fine root biomass variation. Functional richness was positively correlated with community fine root biomass in temperate forest site and had the highest explanatory power. In temperate forest site, the synergistic increase in functional richness and fine root biomass increased nutrient uptake, whereas in subtropical site, either N restricted fine root growth or functional richness compensated for the decrease in fine root biomass. These findings demonstrate that the fine root biomass and functional diversity of subtropical and temperate forest sites responded differently to N addition.

报告人简介：马磊，博士，河南大学地理与环境学院副教授，博士生导师。长期从事森林群落生态学、植物多样性、植物功能多样性相关研究。主持和参与国内外科研项目近10项；在Forest Ecology and Management, Science of the total Environment, Ecological Indicators, Frontiers in Ecology and Evolution等期刊上发表学术论文20余篇。目前正在依托于河南大别山森林生态系统国家野外科学观测研究站开展氮沉降背景下气候过渡带森林生物多样性及维持机制相关研究。