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应用生态学报 ›› 2021, Vol. 32 ›› Issue (2): 467-476.doi: 10.13287/j.1001-9332.202102.006

• 古生态学专栏 • 上一篇    下一篇

温带地区表土植硅体对温度的响应

刘洪妍1, 介冬梅2*, 刘利丹3, 高桂在2, 李德晖2, 李楠楠2, 马玉凤4   

  1. 1安阳师范学院资源环境与旅游学院, 河南安阳 455000;
    2长白山地理过程与生态安全教育部重点实验室/国家环境保护湿地生态与植被恢复重点实验室/东北师范大学地理科学学院, 长春 130024;
    3湖南师范大学资源与环境科学学院, 长沙 410081;
    4河南省科学院地理研究所, 郑州 450052
  • 收稿日期:2020-03-17 接受日期:2020-08-07 出版日期:2021-02-15 发布日期:2021-08-15
  • 通讯作者: *E-mail: jiedongmei@nenu.edu.cn
  • 作者简介:刘洪妍, 女, 1988年生, 博士研究生。主要从事第四纪环境演化研究。E-mail: 01681@aynu.edu.cn
  • 基金资助:
    国家自然科学基金项目(41771214,41471164,41501013,41201013)、安阳师范学院科研培育基金项目(AYNUKP-2018-A10)和安阳师范学院大学生创新创业训练计划项目(X2020104790149)资助

Responses of phytoliths in topsoil samples to temperature variation in temperate region

LIU Hong-yan1, JIE Dong-mei2*, LIU Li-dan3, GAO Gui-zai2, LI De-hui2, LI Nan-nan2, MA Yu-feng4   

  1. 1School of Resource Environment and Tourism, Anyang Normal University, Anyang 455000, Henan, China;
    2Key Laboratory of Geographical Process and Ecological Security in Changbai Mountains, Ministry of Education/State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration/College of Geographical Science, Northeast Normal University, Changchun 130024, China;
    3College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China;
    4Institute of Geographical Sciences, Henan Academy of Sciences, Zhengzhou 450052, China
  • Received:2020-03-17 Accepted:2020-08-07 Online:2021-02-15 Published:2021-08-15
  • Contact: *E-mail: jiedongmei@nenu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (41771214, 41471164, 41501013, 41201013), the Research of the Cultivation Fund Project in Anyang Normal University (AYNUKP-2018-A10), and the College Students’ Innovative Entrepreneurial Training Plan Program in Anyang Normal University (X2020104790149)

摘要: 植硅体的现代过程研究是利用植硅体这一指标精准恢复区域古植被、古气候的前提和关键环节,探讨表土植硅体组合的空间分布特征及其对环境因子的响应尤为重要。本研究在东北地区沿着年降水量为600 mm等降水线采集54块表土样品,研究单一温度控制下表土植硅体的空间分布规律,以期寻找对温度比较敏感的植硅体类型。结果表明: 54块表土样品中植硅体类型相同,共鉴定出15类,分别是棒型、尖型、块状、扇型、扁平状、帽型、鞍型、哑铃型、齿型、三棱柱型、硅化气孔、导管型、硅质突起、弓型、椎骨状,且主要以棒型、尖型为主,短细胞、块状、扁平状次之,其他类型植硅体的平均百分含量不足1.0%。小兴安岭、松辽平原和辽西低山丘陵3个区域的表土植硅体组合特征存在差异,判别分析结果能够将3个区域样点有效区分开,总的判别正确率为94.4%,其中棒型、尖型、三棱柱型的平均含量在小兴安岭最大,在辽西低山丘陵最小;而鞍型、哑铃型、硅质突起与之相反;块状、扁平状、扇型则主要是在松辽平原最大,且棒型、尖型、三棱柱型、鞍型、哑铃型、硅质突起、块状、扁平状和扇型的百分含量在3个区域之间存在显著差异。棒型、尖型、三棱柱型的百分含量与年均温之间存在显著负相关,块状、扁平状、扇型、哑铃型、硅质突起的百分含量与年均温呈显著正相关,而鞍型、帽型、齿型的百分含量与年均温没有显著相关性。

关键词: 植硅体, 等降水线, 环境意义

Abstract: Modern phytolith research is the premise to accurately reconstruct the regional paleovegetation and paleoclimate. It is thus particularly important to study the spatial distribution characteristics of the phytolith assemblages and the response of the phytolith to environmental factors. In this study, we collected 54 topsoil samples along the isohyet of 600 mm in Northeast China to examine the distribution patterns of phytolith along the gradient of single environmental factor. With this special sampling method, we targeted to reveal the responses of phytolith assemblages in the topsoil to the variation of temperature. The results showed that there were a large number of phytoliths with various morphotypes in the 54 topsoil samples in Northeast China. The phytolith morphotypes were the same, including elongate, lanceolate, blocky, cuneiform, tabular, saddle, rondel, bilobate, trapeziform polylobate, prism, silicified stomata, conduit, papillae, sclereid and carinate. In gene-ral, the contributions of elongate and lanceolate were high; the contributions of short cell phytoliths, blocky, tabular and cuneiform were small relatively; the contributions of the other types of phytoliths were less than 1.0% and appeared sporadically in the topsoil samples. Besides, the phytolith assemblages of the topsoil samples were different among Xiaoxing’an Mountains, Songliao Plain and Liaoxi hills. Combined with the discriminant analysis, the samples from the three regions could be effectively separated based on the phytoliths assemblages, with a total accuracy of 94.4%. Specifi-cally, the average percentage of elongate, lanceolate, prism was the largest in Xiaoxing’an Mountains, and was the smallest in Liaoxi hills; the percentage of saddle, bilobate, papillae was the largest in Liaoxi hills and the smallest in Xiaoxing’an Mountains; the percentage of blocky, tabular, cuneiform was the largest in Songliao Plain. Meanwhile, the percentages of the elongate, lanceolate, prism, saddle, bilobate, papillae, blocky, tabular, cuneiform were significant diffe-rences among the three regions. There were significant negative correlations between the percentages of elongate, lanceolate, prism and the annual average temperature, and positive relationships between the percentages of the blocky, tabular, cuneiform, bilobate, papillae and the annual average temperature. However, the percentage of saddle, rondel and trapeziform polylobate did not change with increasing annual average temperature.

Key words: phytolith, isohyet, environmental sense