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| 植物种群更新的补充限制 | |
| 引用本文： | 韩大勇,张维,努尔买买提?依力亚斯,杨允菲.植物种群更新的补充限制[J].植物生态学报,2021,45(1):1-12. |
| 作者姓名： | 韩大勇 张维 努尔买买提?依力亚斯 杨允菲 |
| 作者单位： | 伊犁师范大学生物与地理科学学院, 新疆伊宁 835000 东北师范大学草地科学研究所, 植被生态科学教育部重点实验室, 长春 130024 |
| 基金项目： | 新疆维吾尔自治区自然科学基金(2019D01C332);国家自然科学基金(31560095) |
| 摘 要： | 补充限制基于生态位理论, 从种子萌发、幼苗存活和生长、繁殖体扩散等生活史阶段的种群统计特征及环境因素(土壤水分、养分、凋落物等)着手, 探讨种群的更新问题。种源限制和微生境限制是补充限制理论研究的核心内容, 但是哪个更为重要并没有统一的结论。种源限制与种子生产、土壤种子库和地下芽库中的繁殖体数量不足有关。其中, 气候的年际波动、土壤种子库寿命和动物的捕食都会影响种子生产在种群更新中的作用; 土壤种子库常被视为种群更新的保险库, 与地上种子雨共同促进种群更新, 但是, 如果土壤里种子具有较高的死亡率和休眠率, 将会降低种子库的作用; 地下芽库及其产生的无性分株对于种群更新的意义更多地体现在干扰后种群更强的恢复能力上。扩散限制是种群更新中的普遍现象, 与种子产量、散布能力、传播媒介、幼苗密度等因素有关。微生境限制主要表现为水分、养分、凋落物等非生物因素以及竞争、捕食等生物因素对种子的活力、萌发性、幼苗的存活力、物质分配等过程的影响, 其重要性随着植物生活史阶段而发生变化。未来需要进行综合的、长期的实验, 并应着重加强种源限制及相关生态过程的进化与生态相结合的机理性研究, 从而更深刻地认识和理解种群更新问题, 建立更为综合、系统的种群更新理论体系。 |
| 关 键 词： | 种源限制 微生境限制 幼苗存活 地下芽库 扩散限制 |
| 收稿时间： | 2020-07-23 |
Recruitment limitation of plant population regeneration |
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| HAN Da-Yong,ZHANG Wei,Nuermaimaiti YILIYASI,YANG Yun-Fei.Recruitment limitation of plant population regeneration[J].Acta Phytoecologica Sinica,2021,45(1):1-12. | |
| Authors: | HAN Da-Yong ZHANG Wei Nuermaimaiti YILIYASI YANG Yun-Fei |
| Affiliation: | School of Biology and Geography Sciences, Yili Normal University, Yining, Xinjiang 835000, China Ministry of Education Key Laboratory of Vegetation Ecology, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China |
| Abstract: | Based on niche theory, recruitment limitation is to discuss population regeneration through the population demographic characteristics in different life stages, such as seed germination, seedling survival and growth, propagule dispersal, and varied environmental factors (soil moisture, nutrients, litter, etc.). The core of recruitment limitation consists of seed limitation and microsite limitation; however, there is no universal conclusion on which of them is more dominant. Seed limitation is related to insufficient propagules of seed production, soil seed bank and underground bud bank. Specifically speaking, inter-annual climate fluctuation, soil seed bank life time and animal predation can lead to seed limitation. Soil seed bank is often regarded as the vault of population recruitment, which promotes population recruitment together with the above ground seed rain. In contrast, if soil seeds have high death rate and dormancy rate, the role of seed bank will decline. The contribution of underground bud bank and its clonal ramets for population regeneration are more reflected on stronger resilience to disturbance. Dispersal limitation is a common phenomenon in population regeneration, which is related to many factors including seed production, dispersal ability, spreading media and seedling density. In terms of microsite limitation, embodying in how abiotic factors such as water, nutrients, litters, and biotic factors such as competition and predation effect on seed vigor, germination, seedling viability, and biomass allocation, its importance often varies with the stages of plant life history. In the future, it is necessary to conduct comprehensive and long-term experiments to focus on the underlying mechanisms involving evolution and ecology on seed limitation and its associated ecological processes, so as to obtain a more profound understanding of population recruitment, and establish a more comprehensive and systematic framework of population recruitment. |
| Keywords: | seed limitation microsite limitation seedling survival belowground bud-bank dispersal limitation |
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