| 火烧高温对泥炭藓孢子萌发力影响的模拟实验 |
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| 引用本文： | 郭泓伯,徐雪莹,卜兆君,冯璐,吕熙瑶,王建毅,陈永达,夏尤普·玉苏甫,鹿凡. 火烧高温对泥炭藓孢子萌发力影响的模拟实验[J]. 生态学杂志, 2019, 0(8): 2369-2376 |
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| 作者姓名： | 郭泓伯 徐雪莹 卜兆君 冯璐 吕熙瑶 王建毅 陈永达 夏尤普·玉苏甫 鹿凡 |
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| 作者单位： | 长白山地理过程与生态安全教育部重点实验室东北师范大学地理科学学院;国家环境保护湿地生态与植被恢复重点实验室东北师范大学泥炭沼泽研究所;长白山湿地生态过程与环境变化吉林省重点实验室;滨州学院山东省黄河三角洲生态环境重点实验室 |
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| 基金项目： | 国家自然科学基金项目(41871046,41471043);国家重点研发计划项目(2016YFC0500407);吉林省科技发展计划项目(20190101025JH)资助 |
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| 摘 要： | 作为生态系统稳定性维持的一个重要因素,火对泥炭地优势植物泥炭藓(Sphagnum)孢子库的影响尚不清楚.以采自长白山区泥炭地的泥炭土和3种泥炭藓的成熟孢子为实验材料,室内模拟火烧,以此设置不同温度水平(20、40、60或100℃,持续0.5、1、2、4或10 min),对泥炭藓孢子进行热激处理,经萌发实验后,研究火烧高温对孢子萌发率的影响.结果显示,火烧期间各层土温随深度而递减,表层泥炭可达300℃的极端高温,而1 cm深温度仅为70℃,体现出泥炭土良好的热缓冲性;40℃的热激可使锈色泥炭藓(S.fuscum)与中位泥炭藓(S.magellanicum)孢子萌发率提高20%与50%;60℃的热激使尖叶泥炭藓(S.capillifolium)孢子的萌发率提高1倍;100℃热激对3种泥炭藓孢子萌发则有强烈的抑制作用.研究表明,泥炭藓孢子耐受高温的能力有限,但土壤中的孢子凭借泥炭的良好热缓冲性,可以躲避火烧高温造成的致命伤害,适度的热激甚至能提高其萌发力,对其在火后的建植及种群的长存可能有重要意义.
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| 关 键 词： | 泥炭藓 火干扰 热激 萌发率 土壤温度 |
Effects of high temperature during burning on Sphagnum spore germinability: A simulated experimental study |
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| GUO Hong-bo,XU Xue-ying,BU Zhao-jun,FENG Lu,Lü Xi-yao,WANG Jian-Yi,CHEN Yong-da,Shuayib Yusup,LU Fan. Effects of high temperature during burning on Sphagnum spore germinability: A simulated experimental study[J]. Chinese Journal of Ecology, 2019, 0(8): 2369-2376 |
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| Authors: | GUO Hong-bo XU Xue-ying BU Zhao-jun FENG Lu Lü Xi-yao WANG Jian-Yi CHEN Yong-da Shuayib Yusup LU Fan |
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| Affiliation: | (Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China;State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun 130024, China;Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun 130024, China;Shandong Provincial Key Laboratory of Eco Environmental Science for the Yellow River Delta, Binzhou 256603, Shandong, China) |
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| Abstract: | GUO Hong-bo;XU Xue-ying;BU Zhao-jun;FENG Lu;Lü Xi-yao;WANG Jian-Yi;CHEN Yong-da;Shuayib Yusup;LU Fan(Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China;State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun 130024, China;Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun 130024, China;Shandong Provincial Key Laboratory of Eco Environmental Science for the Yellow River Delta, Binzhou 256603, Shandong, China) |
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| Keywords: | Sphagnum fire disturbance heat shock germination percentage soil temperature |
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