关键词：
中纬度;森林生态系统;涡动协方差技术;2通量','','YJ;mmd2B3rqTXZTiARF2EOSkeCu00ViTvVJLrpbIpVIEXbX5sTDGuYOjqJ9389npwLVC4');
>CO2通量;物候模型
摘 要：
基于国际通量网(FLUXNET)注册站点美国摩根门罗州国有森林(US-MMS)通量观测塔记录的2000-2014年生态系统总初级生产力数据和气温数据,结合物候模型探讨该温带森林生态系统的物候特征以及气温对生态系统物候过程的影响.结果表明:2000-2014年US-MMS温带森林生态系统生长季开始于第105天,第306天结束,生态系统生长季长度约201 d;US-MMS温带森林生态系统的生长季长度主要由生长季结束日和生长季衰落期控制(P<0.01),而生长季开始日对生态系统生长季长度的影响相对较小(P<0.05);随着生长季结束日的延迟和生长季衰落期的延长,生态系统生长季长度延长;增温导致生态系统生长季开始日提前,但气温对生态系统生长季结束日的影响较小.
作 者：
GONG Yuan;ZHANG Yinlong;College of Biology and the Environment, Nanjing Forestry University;Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University;Department of Biological Sciences, The University of Alabama;
关键词：
mid-latitude;;forest ecosystem;;eddy covariance;;CO_2 flux;;phenology model
摘 要：
Based on data of gross primary productivity(GPP) and air temperature from 2000 to 2014, which were recorded at a registered FLUXNET station at morgan-monroe state forest, USA(US-MMS), the phenological characteristics of the temperate forest ecosystem and the effect of air temperature on the phenological process of the ecosystem were analyzed via phenology model. The results showed that from 2000 to 2014 growing season started on the 105 th day and ended at the 306 th day, totaling 201 days. The length of growing season in US-MMS temperate forest was a function of the end of growing season and the senescence phase of growing season(P<0.01), which was relatively less affected by the start of growing season compared with the former 2 factors(P<0.05). If the end of growing season delayed or the length of senescence phase prolonged, the length of the growing season for the ecosystem was in a tendency to prolong. Warming effects triggered the start of growing season in advance but exerted minor effect on the end of growing season. The study is attributed to the knowledge of carbon cycle in terrestrial ecosystem.
