氮沉降对森林土壤碳矿化影响的生物学机制
Biotic Mechanisms of Nitrogen Deposition Influencing Forest Soil Carbon Mineralization
王明柳 1陆梅 1黄敏超 1孙煜佳 1郭础鸟 1刘国庆1
作者信息
- 1. 西南林业大学生态与环境学院,昆明 650024
- 折叠
摘要
大气氮沉降及CO2 浓度剧增所导致的全球变化已经成为当今世界面临的严峻生态环境问题.土壤碳矿化作为森林生态系统碳循环的关键过程,不仅影响森林土壤碳的固定与转变,而且通过CO2 释放影响全球气候变暖.探明大气氮沉降对土壤碳矿化影响的生物学机制,有助于丰富人们对森林土壤碳源—汇平衡过程的科学认识,在全球变化研究中具有极其重要的意义.文中基于森林"植物—微生物—土壤动物"交互作用的生态学过程,阐明了大气氮沉降增加背景下森林植物(凋落物、根系及其分泌物)、土壤微生物(生物量、群落结构、多样性、养分代谢竞争)、土壤酶(种类、数量、活性)、土壤动物(蚯蚓、蚂蚁、线虫、螨类、跳虫)等生物因素变化对土壤碳矿化的影响过程及机制,以期为准确预测大气氮沉降对全球气候变化的影响提供关键理论支撑.
Abstract
The global climate change caused by dramatic increases in atmospheric nitrogen deposition and CO2 concentration has become a severe eco-environmental issue around the world.Soil carbon mineralization is a key process in the carbon cycling in forest ecosystem.It not only affects the fixation and transformation of forest soil carbon but also lead to global climate warming through the CO2 release.Exploring the biological mechanism of atmospheric nitrogen deposition influencing soil carbon mineralization is helpful to increase people's scientific understanding of the process of carbon source-sink balancing in forest ecosystems,which may have an extremely important significance for global climate change research.Based on the ecological interactive process of"plant-microbial-soil fauna"in forest ecosystem,the effects of biotic changes of forest plants(litter,roots and their secretions),soil microorganisms(biomass,community structure,diversity and nutrient metabolism competition),soil enzymes(types,quantity and activity),and soil fauna(earthworms,ants,nematodes,mites,and collembola)on soil carbon mineralization and its mechanism are expounded under the background of increasing atmospheric nitrogen deposition.This study is thus expected to provide a theoretical support for accurately predicting the effect of atmospheric nitrogen deposition influencing global climate change.
关键词
氮沉降/碳矿化/生物学机制/植物根系/土壤酶活性/土壤微生物/土壤动物Key words
nitrogen deposition/carbon mineralization/biological mechanism/plant root/soil enzyme activity/soil microorganism/soil fauna引用本文复制引用
基金项目
国家自然科学基金地区科学基金项目(42067011)
云南省应用基础研究面上项目(202001AT070113)
云南省中青年学术技术带头人后备人才项目(202205AC160047)
出版年
2024
国家科技期刊平台
NSTL
万方数据