民勤绿洲边缘两种生境红砂种群空间格局及关联性分析

干旱区地理 ›› 2016, Vol. 39 ›› Issue (1): 112-121.

民勤绿洲边缘两种生境红砂种群空间格局及关联性分析

付贵全¹, 徐先英^1,2, 徐梦莎³, 赵鹏², 张莹花², 刘江¹, 郭挺⁴, 乔宇¹

1. 中国林业科学研究院, 民勤治沙综合试验站, 甘肃民勤 733000;
2. 甘肃省治沙研究所, 荒漠化与风沙灾害防治国家重点实验室培育基地, 甘肃兰州 730070;
3. 中国林业科学研究院, 国家林业局泡桐研究开发中心, 河南郑州 450003;
4. 甘肃农业大学, 林学院, 甘肃兰州 730070

收稿日期:2015-07-01 修回日期:2015-10-25 出版日期:2016-01-25
通讯作者: 徐先英(1963-),男,研究员,主要从事荒漠化防治研究.Email:xyingxu@163.com
作者简介:付贵全(1987-),男,硕士研究生,主要从事荒漠化防治研究.Email:fgq1152688593@163.com
基金资助:
国家重点基础研究发展计划(2012CB723203);国家自然科学基金(41161006);国家科技支撑项目(2012BAD16B0203)

Spatial point pattern and relevancy of Reaumuria soongorica population under the two habitats in Minqin oasis fringe

FU Gui-quan¹, XU Xian-ying^1,2, XU Meng-sha³, ZHAO Peng², ZHANG Ying-hua², LIU Jiang¹, GUO Ting⁴, QIAO Yu¹

1 Chinese-of Forestry, Minqin Desert Control Comprehensive Experimental Station, Minqin 733000, Gansu, China;
2 Gansu Desert Control Research Institute, State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating, Lanzhou 730070, Gansu, China;
3 Chinese Academy of Forestry, China Paulownia Research and Development Center, Zhengzhou 450003, Henan, China;
4 Forestry College of Gansu Agricultural University, Lanzhou 730070, Gansu, China

Received:2015-07-01 Revised:2015-10-25 Online:2016-01-25

摘要/Abstract

摘要： 以民勤绿洲边缘丘间低地和固定沙丘(退化梭梭固沙林)两种生境下红砂种群为研究对象,采取空间替代时间和O-ring 空间点格局方法研究了红砂种群的结构特征、空间分布以及空间关联性,结果表明:(1)红砂种群在丘间低地生境下,主要集中在龄级1;在固定沙丘生境下,主要集中在龄级3,表明种群的更新受到很大的限制.(2)两种生境下红砂种群的空间格局分布和不同龄级间空间关联性差异很大.丘间低地的红砂种群及龄级1 和2 在小尺度范围内呈聚集分布,之后随着尺度的增加趋于均匀分布(龄级1 和红砂整个种群)或随机分布(龄级2),而龄级3 在整个研究尺度范围内为随机分布;固定沙丘生境下的红砂植株只有龄级2 和整个种群在小尺度内为聚集分布,其余均为随机分布.(3)在丘间低地生境下,龄级1 和龄级2、3 在小尺度上显著负相关,其余各龄级在0~5 m尺度上基本无关联;固定沙丘生境下,各个龄级之间均为无关联.这种差异与生境的异质性(地下水位、结皮的类型和盖度等)以及群落结构等有关.该研究对于民勤绿洲边缘红砂种群的保护和利用以及退化梭梭固沙林的人工修复有一定的指导意义.

关键词: 红砂种群, 不同生境, 空间格局, 关联性, 民勤绿洲边缘

Abstract: Minqin oasis fringe is located between Tengger desert and Badain Juran desert,China,which has a great ecological strategic significance. Although the windbreak and sand-fixation plantation has appeared different degree of degradation,Reaumuria soongorica has successfully settled in the degenerated Haloxylon ammodendron woodland. In order to explore the structural characteristics,spatial patterns and spatial relevancy of Reaumuria soongorica population under the interdunal depression and fixed dunes habitats in Minqin oasis fringe,the O-ring statistic of point pattern analysis and space instead of time were used in this paper. The results showed as follows:(1)the majority of Reaumuria soongorica individuals were in age 1 under the interdunal depression,being growth population;under the fixed dunes,most of the Reaumuria soongorica individuals were in age 3 which were recession populations,indicating that the update of Reaumuria soongorica population had been greatly restricted.( 2)The spatial distribution pattern and spatial relevancy between different age class individuals of Reaumuria soongorica population were very different in the two habitats. Under interdunal depression,Reaumuria soongorica population and the individuals in age 1 and age 2 showed aggregated distribution at small scales,and then as the scale extending,it tended to be uniform distribution in Reaumuria soongorica population and individuals in age 1 or random distribution in the individuals of age 2;Individuals in age 3 showed random distribution at all scales. In fixed dunes,only Reaumuria soongorica population and individuals in age 2 showed aggregated distribution at small scales,and the rest populations and individuals all presented random distribution.(3)Under the interdunal depression,there existed significant negative correlation between individuals of age 1 and age 2,3 at small scales,and no correlation among the rest age classes at zero to five meters scale;under the fixed dunes, there were no correlation among all the various age classes. These results implied that the age-class relevance of Reaumuria soongorica population could be related to underground water level,soil crust type and coverage,the community structure and so on,which are instructive to the protection and utilization of Reaumuria soongorica population or human-induced restoration for degenerated Haloxylon ammodendron woodland.

Key words: Reaumuria soongorica population, different habitats, spatial pattern, spatial relevancy, Minqin oasis fringe

中图分类号:

Q948.15

付贵全, 徐先英, 徐梦莎, 赵鹏, 张莹花, 刘江, 郭挺, 乔宇. 民勤绿洲边缘两种生境红砂种群空间格局及关联性分析[J]. 干旱区地理, 2016, 39(1): 112-121.

FU Gui-quan, XU Xian-ying, XU Meng-sha, ZHAO Peng, ZHANG Ying-hua, LIU Jiang, GUO Ting, QIAO Yu. Spatial point pattern and relevancy of Reaumuria soongorica population under the two habitats in Minqin oasis fringe[J]. , 2016, 39(1): 112-121.

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