中亚热带3种次生林生态系统服务权衡与协同  

Trade-off and synergy between ecosystem services in three secondary forests in the mid-subtropical area of Southern China

作　　者：吴炜 项文化[1,2] 勾蒙蒙 徐传洪 欧阳帅 方晰[1,2] WU Wei;XIANG Wenhua;GOU Mengmeng;XU Chuanhong;OUYANG Shuai;FANG Xi(Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, China;Huitong National Field Station for Scientific Observation and Research of Chinese Fir Planation Ecosystem in Hunan Province, Huitong, Hunan 438107, China;Chinese Research Academy of Environmental Sciences, Beijing 100012, China)

机构地区：[1]中南林业科技大学生命科学与技术学院,湖南长沙410004 [2]湖南会同杉木林生态系统国家野外科学观测研究站,湖南会同438107 [3]中国环境科学研究院,北京100012

出　　处：《森林与环境学报》2019年第3期256-264,共9页Journal of Forest and Environment

基　　金：林业公益性行业科研专项(201304317);国家自然科学基金项目(31570447;31700636)

摘　　要：以中亚热带地区不同演替阶段次生林为对象,研究了马尾松+石栎针阔混交林(PM)、南酸枣落叶阔叶林(CA)及青冈+石栎常绿阔叶林(CG) 2种调节服务[土壤有机碳(SOC)调节、全氮(TN)调节]及1种支持服务(物种多样性)之间的权衡与协同关系及其影响因素。结果表明:CA的物种多样性显著高于PM、CG,CA与CG的土壤SOC、TN含量显著高于PM。3种次生林土壤SOC调节与TN调节为协同关系,物种多样性与土壤SOC、TN调节为权衡关系,PM、CA权衡表现为物种多样性具有相对较高的收益,CG权衡无固定的相对受益方。在演替前期,常绿阔叶树种比例、土壤p H分别与土壤TN调节-物种多样性、土壤SOC调节-土壤TN调节的权衡呈负相关,随着演替进行,地形因子、土壤因子及树种组成因子对生态系统服务权衡产生的影响较小。Three ecosystem services ( S E), including, soil organic carbon (SOC) concentration, total N (TN) concentration, and plant species diversity, were analyzed in the following three subtropical secondary forests: Pinus massoniana+Lithocarpus glaber mixed forest (PM), Choerospondias axillaris deciduous broadleaved forest (CA), and Cyclobalanopsis glauca+L. glaber evergreen broadleaved forest (CG). The trade-off and synergy between the S E and thecontributing factors of trade-offs were also analyzed. The results showed the following.(1) Plant species diversity in CA was significantly higher than that in PM and CG;the SOC and TN concentrations in CA were significantly higher than those in PM.(2) The SOC and TN concentrations exhibited a 1 ∶ 1 synergy in the three secondary forests. The highest trade-offs were observed between SOC concentration-plant species diversity and TN concentration-plant species diversity;plant species diversity had relatively higher benefits in PM and CA.(3) During the early stages of succession, the proportion of evergreen broadleaved species and TN-plant species diversity trade-off were significantly negatively correlated, as were pH and SOC-TN trade-off. With succession, the terrain, soil, and species composition factors had negligible effects on the trade-off between the S E.

关 键 词：中亚热带次生林 土壤有机碳 土壤全氮 物种多样性 权衡与协同 影响因素 

分 类 号：S718.5[农业科学—林学]