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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。
The leaf litter rhythm is one of the plant’s main functional strategies. Studying the leaf litter rhythm of the total species of succession (at least in 3 stages) and the alternate species (endemic to each stage) is of great importance to understand the mechanism of species replacement in forest succession Significance. In this study, four succession stages of evergreen broad-leaved forest in Zhejiang Tiantong were selected. Through the investigation of the leaf litter season dynamics of 4 common species and 6 more alternate species, we discussed whether the litterfall patterns of common species differed in different succession stages, As well as the difference of the leaf litter rhythm between the common species and the alternate species. The results showed that the succession had a significant effect on leaf litter rhythm of Pinus massoniana, Schima superba and Castanopsis fargesii (P <0.05), but no significant effect on the leaf litter rhythm of Eurya japonica Significantly affected. The differences of leaf litter rhythms between the common species and the alternate succession stages of the succession stage were different in different succession stages. The leaf litter rhythm of Masson pine, Schima superba and Lithocarpus glabra and Loropetalum chinense were significantly different in the first stage of succession (P <0.05). Symplocos caudate ) Leaf litter rhythms were significantly different (P <0.05). There were significant differences in leaf litter rhythm between Castanopsis sclerophylla and Castanopsis sclerophylla (P <0.05). Cinnamomum pedunulatum, Camellia oleracea, Camellia cuspidate, Leaf litter rhythms were significantly different (P <0.05), the other no significant difference. In conclusion, the leaf litter rhythms of some species in succession changed with forest succession, while the others did not change. In the same succession stage, there were differences in leaf litter rhythm between the most common species and the more alternate species. The changes of the leaf litter rhythm of the common and alternate species of succession reflect the diverse adaptation strategies of the plant to the microenvironment changes in the succession process of leaf phenology.