浙江天童常绿阔叶林演替系列植物叶片的凋落节律  

Litterfall dynamics of plants in a successional series of evergreen broad-leaved forests in Tiantong region,Zhejiang Province

作　　者：张晴晴[1,2] 周刘丽 赵延涛[1,2] 许洺山[1,2] 阎恩荣[1,2] 

机构地区：[1]华东师范大学生态与环境科学学院,上海200241 [2]浙江天童森林生态系统国家野外科学观测研究站,浙江宁波315114

出　　处：《生态学杂志》2016年第2期290-299,共10页Chinese Journal of Ecology

基　　金：国家自然科学基金(31270475);宁波市重大科技攻关项目(2012C10027)资助

摘　　要：叶片凋落节律是植物的主要功能策略之一,探索演替共有种(至少存在于3个阶段)和更替种(各阶段特有种)的叶片凋落节律对于理解森林演替过程中物种的更替机制具有重要意义。本研究选择浙江天童常绿阔叶林4个演替阶段,通过对4个共有种和6个更替种叶片凋落季节动态的调查,探讨了共有种的凋落节律是否在不同演替阶段存在差异,以及共有种和更替种叶片凋落节律的差异。结果显示,演替对共有种马尾松(Pinus massoniana)、木荷(Schima superba)和栲树(Castanopsis fargesii)的叶片凋落节律具有显著影响(P<0.05),而对柃木(Eurya japonica)无显著影响。共有种与该演替阶段特有更替种叶片凋落节律的差异在不同演替阶段表现不同。演替第一阶段的马尾松、木荷与石栎(Lithocarpus glabra)、檵木(Loropetalum chinense)叶片凋落节律差异显著(P<0.05);演替第二阶段的木荷与山矾(Symplocos caudate)叶片凋落节律有显著差异(P<0.05)。栲树与苦槠(Castanopsis sclerophylla)叶片凋落节律有显著差异(P<0.05);演替第四阶段的木荷、栲树、柃木与天竺桂(Cinnamomum pedunculatum)、连蕊茶(Camellia cuspidate)叶片凋落节律存在显著差异(P<0.05),其他无显著差异。综上表明,部分演替共有种叶片凋落节律随森林演替发生改变,而另外部分不发生改变。在同一演替阶段,绝大部分演替共有种和更替种的叶片凋落节律存在差异。演替共有种和更替种叶片凋落节律的变化反映了植物在叶片物候方面对演替过程中微环境变化的多样适应策略。Litterfall dynamic is one of the functional strategies in plant species. Exploring litterfall dynamics of overlapping （i.e., co-occurring at three successional stages at least） and turnover （i.e., occurring at one successional stage only） species is important for understanding mechanisms underlying species replacement during forest succession. In this study, seasonal dynamics of litterfall over 4 overlapping species and 6 turnover species were investigated in four successional stages in evergreen broadleaved forests in Tiantong National Forest Park （29.45° N, 121.97° E） , Zhejiang Province. Then differences in litterfall dynamics were examined between overlapping species at different successional stages, and between overlapping and turnover species. The results showed that, in addition to Earya japonica （P〉0.05） , litterfall dynamics in overlapping species of Pinus massoniana, Schima saperba and Castanopsis fargesii （ P 〈 0.05 ） were significantly affected by forest succession. Differences in litterfall dynamics between overlapping and turnover species were successional stage-dependent. Specifically, at the first successional stage, there were significant differences in litterfall dynamics among P. massoniana, S. superba, Lithocarpus glaber and Loropetalum chinense （P〈0.05）. At the secondary successional stage, litterfall dynamics varied significantly between S. superba and Symplocos caudata （P〈0.05） and between C. fargesii and C. sclerophylla （P〈0.05）. At the fourth successional stage, litterfall dynamics of S. superba, C. fargesii, Eurya japonica, Cinnamomum pedunculatum and Camellia cuspidata differed significantly （P〈0.05）. There was no significant difference in litterfall dynamics between other species. In summary, litterfall dynamics changed partly for overlapping species during forest succession. At the same successional stage, litterfall dynamics differed significantly between overlapping and turnover species. Changes of litterfatl dynamics in overlapping

关 键 词：凋落物 季节动态 共有种 森林演替 

分 类 号：S718.5[农业科学—林学]