干旱区生态环境知识资源中心(Arid): 水源圈对荒漠草原土壤种子库的影响

Arid

	水源圈对荒漠草原土壤种子库的影响
其他题名	Piosphere effect on soil seed bank in desert steppe
	连仲民 1; 徐婷 2; 徐文轩 1; 吴珂 1; 杨维康 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2015
卷号	34 期号:10 页码:2778-2784
中文摘要	草场上,由于饮水的需求导致牲畜经常在水源点和草场间往返,从而出现水源圈现象。本研究以新疆准噶尔盆地东南缘荒漠草原人工水源点为中心,在距其50、100、 200、400、800和1200 m处设置了6个采样点,通过室内培养获得了土壤种子库数据。结果表明: 土壤种子库共有17种植物,分属于8科,藜科和菊科居多,其中1年生草本植物10种,多年生草本植物7种。水源圈内土壤种子库密度在211.5 ~ 362.5粒·m~(-2),其中距水源点50 m处土壤种子库密度最低,距水源点1200 m处最高。距离水源圈越近,土壤种子库的物种数量极显著增加(P<0.01),1年生草本植物种数所占比例减小,多年生草本植物种数所占比例增大。在相邻采样点间,土壤种子库物种组成相似性指数较高,为0.70 ~ 0.84,表现出较小的空间异质性。距离水源点越近,多样性指数、丰富度指数和均匀度指数越大,水源圈效应增加了土壤种子库物种数量,导致主要建群植物种子减少,短命、类短命草本植物种子增加。
英文摘要	In grasslands,livestock often concentrate in the vicinity of water point due to watering demands,which generates piosphere. We set 6 sampling distances (50,100,200,400,800 and 1200 m) from an artificial water point in the Junggar Basin,Xinjiang,and collected soil samples to investigate the soil seed bank. Our analysis showed that there were 17 species belonging to 8 families in the soil seed bank. The species were mainly from Compositae and Chenopodiaceae. The numbers of annual herbs and perennial herbs were 10 and 7 respectively. The soil seed bank density was 211.5-362.5 seeds·m~(-2),and the lowest density of soil seed bank was found in the closest vicinity of the water point (50 m), while the highest was observed in the farthest area (1200 m). The species number of the soil seed bank significantly decreased (P<0.01) with distance from water point; the percentage of the annual herbs increased,while the percentage of the perennial herbs decreased. The similarity indexes of the soil seed bank between every two adjacent sampling points were 0.70-0.84,displaying small spatial heterogeneity. The Shannon, Margalef and Pielou indexes of soil seed bank decreased with distance from water point. These results suggested that the number of plant species in soil seed bank was increased by piosphere effect. Consequently,the number of constructive species seeds decreased,while the number of ephemeral and ephemeroid plant seeds increased.
中文关键词	荒漠草地 ; 水源圈 ; 放牧 ; 土壤种子库
英文关键词	desert steppe piosphere grazing soil seed bank
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5540975
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233241
作者单位	1.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.伊犁哈萨克自治州气象局, 伊宁, 新疆 835000, 中国
推荐引用方式 GB/T 7714	连仲民,徐婷,徐文轩,等. 水源圈对荒漠草原土壤种子库的影响[J]. 中国科学院新疆生态与地理研究所,2015,34(10):2778-2784.
APA	连仲民,徐婷,徐文轩,吴珂,&杨维康.(2015).水源圈对荒漠草原土壤种子库的影响.生态学杂志,34(10),2778-2784.
MLA	连仲民,et al."水源圈对荒漠草原土壤种子库的影响".生态学杂志 34.10(2015):2778-2784.