白江河泥炭地泥炭藓孢子萌发力对排水的响应

doi:10.13287/j.1001-9332.202005.002

应用生态学报 ›› 2020, Vol. 31 ›› Issue (5): 1707-1714.doi: 10.13287/j.1001-9332.202005.002

白江河泥炭地泥炭藓孢子萌发力对排水的响应

杨云荷^1,2,3, 卜兆君^1,2,3*, 张嘉琪^1,2,3, 王灵芝^1,2,3, 陈旭^1,2,3, 冯璐^1,2,4, 李鸿凯^1,2,3, 郭应⁵

¹东北师范大学地理科学学院长白山地理过程与生态安全教育部重点实验室, 长春 130024;
²东北师范大学泥炭沼泽研究所国家环境保护湿地生态与植被恢复重点实验室, 长春 130024;
³长白山湿地生态过程与环境变化吉林省重点实验室, 长春 130024;
⁴滨州学院山东省黄河三角洲生态环境重点实验室, 山东滨州 256603;
⁵贵州省盘县林业局, 贵州盘县 553500

收稿日期:2019-12-12 出版日期:2020-05-15 发布日期:2020-05-15
通讯作者: * E-mail: buzhaojun@nenu.edu.cn
作者简介:杨云荷, 女, 1995年生, 硕士研究生. 主要从事湿地生态学研究. E-mail: yangyh058@nenu.edu.cn
基金资助:
国家自然科学基金项目(41871046,41471043)、国家重点研发计划项目(2016YFC0500407)和吉林省科技发展计划项目(20190101025JH)资助

Responses of the germinability of Sphagnum spores in peat to drainage in Baijianghe Peatland, China

YANG Yun-he^1,2,3, BU Zhao-jun^1,2,3*, ZHANG Jia-qi^1,2,3, WANG Ling-zhi^1,2,3, CHEN Xu^1,2,3, FENG Lu^1,2,4, LI Hong-kai^1,2,3, GUO Ying⁵

¹Ministry of Education Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China;
²State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun 130024, China;
³Jilin Province Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun 130024, China;
⁴Shandong Province Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, Shangdong, China;
⁵Forestry Bureau of Panxian County, Panxian 553500, Guizhou, China

Received:2019-12-12 Online:2020-05-15 Published:2020-05-15
Contact: * E-mail: buzhaojun@nenu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (41871046, 41471043), the National Key R&D Program of China (2016YFC0500407), and the Jilin Provincial Science and Technology Development Project (20190101025JH).

摘要/Abstract

摘要： 排水严重改变泥炭地的环境和生态过程,但对泥炭藓孢子萌发力的影响尚不清楚。在长白山地区白江河泥炭地,分别在优势植物为苔藓的近原始地段和优势植物为小灌木的排水地段,钻取泥炭柱芯为试验材料,逐层测试泥炭理化指标,提取泥炭藓孢子并进行萌发试验,统计孢子数量和萌发力;经过泥炭样品年代测定,建立深度年代关系曲线,研究泥炭藓孢子萌发力对排水的响应和机制。结果表明: 整个柱芯对比,近原始地段平均孢子数略高于排水地段,两地段的平均孢子萌发力无差异,排水地段的泥炭容重、总碳和总氮都显著高于近原始地段。柱芯上部对比,排水(1987年)以后两地段孢子累积速率无显著差异,但近原始地段的平均孢子萌发力(34%)远低于排水地段(72%)。近原始地段的碳氮比与孢子萌发力呈显著正相关;排水地段的总碳、pH和埋藏时间与孢子萌发力呈显著负相关。30年前的泥炭地排水虽对孢子累积影响不大,但通过加速分解而改变了泥炭的理化性质,提升了表层泥炭中孢子萌发力,因此降低孢子库的持久性,可能导致泥炭藓在灾变性干扰后的种群持续更新潜力下降。

关键词: 排水, 碳氮比, 碳累积, 孢子密度

Abstract: Drainage severely changes the environment and ecological process in peatlands, but how does it affect the germinability of Sphagnum spores in peat remains unclear. In this study, we took two peat cores from a near-pristine stand dominated by Sphagnum and a drained stand dominated by dwarf shrubs in Baijianghe Peatland in the Changbai Mountains as experimental materials. Those peat cores were cut into slices. Physicochemical characteristics were measured while Sphagnum spores from each slice were extracted to count spore density and test spore germinability. After dating and determining relationship between peat depth and age, we tried to figure out the mechanism underlying the responses of Sphagnum spore germinability to drainage. The average number of spores in the near-pristine stand was slightly higher than that in the drained stand. There was no difference in average spore germinability between the two stands. The drained stand showed higher peat bulk density, total carbon and total nitrogen relative to the near-pristine stand. Upper peat core showed no significant difference in spore accumulation rate between the two stands after drainage (in 1987), with lower average spore germinability (34%) in the near-pristine stand relative to the drained stand (72%). For the whole peat cores, C/N was positively correlated with spore ger-minability in the near-pristine stand while total carbon, pH and burial time were negatively correlated with spore germinability in the drained stand. The drainage 30 years ago had limited effect on spore accumulation, but improved germinability of spores in shallow peat by changing physicochemical properties of peat due to accelerating decomposition, and thus reduced the persistence of spore bank. This may reduce the persistent regeneration potential of Sphagnum after catastrophic distur-bances.

Key words: drainage, C/N, carbon accumulation, spore density

杨云荷, 卜兆君, 张嘉琪, 王灵芝, 陈旭, 冯璐, 李鸿凯, 郭应. 白江河泥炭地泥炭藓孢子萌发力对排水的响应[J]. 应用生态学报, 2020, 31(5): 1707-1714.

YANG Yun-he, BU Zhao-jun, ZHANG Jia-qi, WANG Ling-zhi, CHEN Xu, FENG Lu, LI Hong-kai, GUO Ying. Responses of the germinability of Sphagnum spores in peat to drainage in Baijianghe Peatland, China[J]. Chinese Journal of Applied Ecology, 2020, 31(5): 1707-1714.

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白江河泥炭地泥炭藓孢子萌发力对排水的响应

Responses of the germinability of Sphagnum spores in peat to drainage in Baijianghe Peatland, China

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