Determine the Boundaries of Grassland Communities Based on Species Important Value and Soil Moisture content

doi:10.11733/j.issn.1007-0435.2012.03.011

Acta Agrestia Sinica ›› 2012, Vol. 20 ›› Issue (3): 450-455.DOI: 10.11733/j.issn.1007-0435.2012.03.011

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Determine the Boundaries of Grassland Communities Based on Species Important Value and Soil Moisture content

HUANG Xin-ying¹, SHAO Xin-qing¹, LV Jin-ying¹, WANG Yu-tong¹, KAN Yu-chen², WANG Kun¹

1. Department of Grassland Science, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
2. Pratacultural College, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China

Received:2012-01-03 Revised:2012-04-06 Online:2012-06-15 Published:2012-07-05

基于物种重要值和土壤水分的草原群落边界判定

黄欣颖¹, 邵新庆¹, 吕进英¹, 王宇通¹, 阚雨晨², 王堃¹

1. 中国农业大学动物科技学院, 北京 100193;
2. 甘肃农业大学草业学院, 甘肃兰州 730070

通讯作者: 王堃,E-mail:wangkun@cau.edu.cn
作者简介:黄欣颖(1987- ),女,山东淄博人,硕士研究生,主要从事退化草地生态系统恢复和草地管理研究,E-mail:baihehuakai.2008@163.com
基金资助:
国家牧草产业技术体系项目(nycytx-37);国家科技支撑计划(2012BAC01B02);公益性行业(农业)科研专项(201203006)(200903060)(201003061)资助

Abstract

Abstract: The different areas of grassland in Hebei Guyuan grassland ecosystem experimental station were observed to investigate the important value of each species and soil moisture content. The boundaries of grassland communities were determined by moving split-window technique. Results showed that the curve of SED peak were in stable status when window size is more than 12 plots and 12 units better reflecting the distribution patterns of above-ground vegetation communities. Four distinct peaks were observed in peak chart. Two acutely transitional zones and two gradually transitional zones were determined based on the change of SED peak. Soil water contents have certain correlation with the distribution patterns of communities. The distribution patterns of communities have a logged response to soil moisture.

Key words: Species important value, Soil moisture, Ecotone, Moving Split-window Technique

摘要： 对河北沽源草地生态系统野外观测研究实验站外不同区域的草原进行调查,统计其各物种重要值,并测定土壤水分,利用游动分割窗技术判定群落边界,以期为草原景观界面判定提供新思路。结果表明:基于物种重要值的欧式平方距离(SED)峰值分析发现,窗口大小为12个及12个以上样地单位时,SED峰值曲线趋于稳定,能较好的反映地上植被群落的分布格局。峰值图上出现4个明显的波峰,依据变化幅度可以判定2个是急变性过渡带,2个是渐变性过渡带。水分与群落分布的格局具有一定相关性,群落分布格局对土壤水分变化做出响应,并呈现一定的滞后性。试验结果验证了游动分割窗技术在草原景观界面判定的可行性。

关键词: 物种重要值, 土壤水分, 生态交错带, 游动分割窗技术

CLC Number:

HUANG Xin-ying, SHAO Xin-qing, LV Jin-ying, WANG Yu-tong, KAN Yu-chen, WANG Kun. Determine the Boundaries of Grassland Communities Based on Species Important Value and Soil Moisture content[J]. Acta Agrestia Sinica, 2012, 20(3): 450-455.

黄欣颖, 邵新庆, 吕进英, 王宇通, 阚雨晨, 王堃. 基于物种重要值和土壤水分的草原群落边界判定[J]. 草地学报, 2012, 20(3): 450-455.

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Determine the Boundaries of Grassland Communities Based on Species Important Value and Soil Moisture content

基于物种重要值和土壤水分的草原群落边界判定

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