| 茂兰喀斯特森林中华蚊母树群落土壤种子库动态初探 |
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| 引用本文： | 刘济明.茂兰喀斯特森林中华蚊母树群落土壤种子库动态初探[J].植物生态学报,2000,24(3):366-374. |
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| 作者姓名： | 刘济明 |
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| 摘 要： | 茂兰喀斯特森林中华蚊母树群落900m2样地内共有种子植物59种，其中19种主要植物已繁殖产生种子。群落每年以种子雨形式向种子库输入种子351.1粒·m-2，其中对群落更新有用的成熟有效种子150.8粒·m-2。土壤种子库中活力种子丰富，共有41种2510.5～2646.8粒·m-2。种子库中活力种子的种类和数量均随时间的变化而变化，不同时间种子库的差异主要在于现存植物活力种子的变化。土壤种子库每年输出活力种子171.9粒·m-2，其中萌发输出21.9粒·m-2，动物采食输出133.5粒·m-2，病菌危害引起的输出为3.2粒·m-2，种子自然衰老引起的输出为13.3粒·m-2。每年输出超过输入21.1粒·m-2。演替前期植物种子没有输入，只有缓慢输出，但没有萌发输出。
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| 关 键 词： | 喀斯特 种子库 活力种子 现存植物 演替 |
A Preliminary Study on the Soil Seed Bank Dynamics of the Distylium chinense Community in the Maolan Karst Fores |
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| LUI Ji-Ming.A Preliminary Study on the Soil Seed Bank Dynamics of the Distylium chinense Community in the Maolan Karst Fores[J].Acta Phytoecologica Sinica,2000,24(3):366-374. |
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| Authors: | LUI Ji-Ming |
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| Abstract: | 59 species of spermatophyte were found in a 900m2 sample plot of Distylium chinensis community in Maolan karst forest. Among the species, 19 critical species have being reproduced. Reproducing species input an average of 351.1 seeds·m-2 to the soil seed bank every year in seed rain. The number of viable seeds capable of contributing to community regeneration was 150.8 seeds·m-2. Viable seeds of 41 species seeds were found, numbering 2510.5～2646.8 grains·m-2 in the soil seed bank. The kind and number of viable seeds in the seed bank changes with time, in a pattern that largely reflects the recent input of seed from (successionally changing) extant species. The loss of viable seeds from the soil seed bank was 17l.9 grains·m-2 every year: these losses included 21.9 grains·m-2 to germination, 133.5 to predation, 3.2 to rot and 13.3 grains·m-2 to decrepitude. This loss of seeds is 21.1 grains·m-2 in excess o{ the annual seed rain input. At the successional stage sampledthe early seral species no longer contribute to the seed rain but do add to the losses from the seed bank, though none of this loss is via germination. |
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| Keywords: | Karst Seed bank Viable seed Extant species Seral earlier species |
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