干旱区生态环境知识资源中心(Arid): 藓类结皮斑块面积与环境因子的关系

Arid

	藓类结皮斑块面积与环境因子的关系
其他题名	Size Characteristics of the Moss Crust Patches and Its Relationship to the Environmental Factors in the Gurbantunggut Desert
	吉雪花 1; 张元明2 ; 陶冶 2; 周小兵 2; 张静 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2013
卷号	33 期号:6 页码:1803-1809
中文摘要	古尔班通古特沙漠生物结皮占该沙漠总面积的30%左右,苔藓结皮是其中的优势者,在防风固沙、捕获隐匿降水和水土保持方面发挥着重要的生态作用。自然状态下,该沙漠苔藓结皮多以镶嵌式或纯群状斑块分布,本文从斑块尺度出发,以斑块面积为指标,分析了该沙漠藓类结皮斑块的分布格局和特征。结果表明:(1)在调查的7 372个藓类结皮斑块中,有6 930个斑块的面积在100cm~2以内,占总斑块数目的94%,面积在100cm~2以上的斑块约为442个,占总斑块数的6%。(2)本研究共调查了143 223cm~2苔藓结皮,其中100cm~2以下的小斑块面积约为57 289cm~2,占总调查面积的40%;其次是大小在100~200cm~2的斑块,面积约为32 941cm~2,占总调查面积的23%;大小在200cm~2以上的斑块面积约为50 128cm~2,占总面积的35%。面积较大的斑块主要分布在沙漠东南部,西北部藓类结皮斑块面积较小,这一变化特征与苔藓结皮在区域尺度的优势发育区一致。(3)藓类结皮斑块面积大小与粒径在0.2mm以下的土壤含量正相关,大粒径的土壤不利于藓类结皮形成较大的斑块。(4)藓类结皮斑块面积与主要灌丛盖度呈微弱负相关,与土壤有机质、全氮、速效钾、可溶性钙含量显著正相关,这与区域尺度的报道一致。
英文摘要	Biological soil crusts takes up 30% area of the Gurbantunggut Desert, moss crusts are the dominant species, they are very important in the prevention of wind and sand, promoting dew capture. In natural condition, moss crusts are distributed in the form of different size patches. In this study, we researched moss crusts from the point of patch size and analyzed the size characteristics and environmental factors that influence the patch size. Our results indicated that:(1)there were 6 930 patches with area less than100 cm~2, and accounted for about 94% of total surveyed moss crust patches;patches with area over 100 cm~2 took up 6% of total surveyed patches. (2)in this study total surveyed area of moss crust were 143 223 cm~2, total area of the patches with area less 100 cm~2 were 57 289 cm~2 and took up 40% of total area;the second rank were those patches with area of 100-200 cm~2, the total area of 100-200 cm~2 patches were 32 941 cm~2 and took up 23% of total surveyed moss crust;the area of those patches with area over 200 cm~2 was 50 128 cm~2 and took up 35% of total surveyed moss crust. On the whole, big size patches mainly occurred in the south-east and small size patches were found in the north-west of the desert, this pattern was consistent with the distribution of moss crust on the regional scale. (3)there was positive effect of soil particles with diameter less than0.2 mm on the patch size, soil particles with the diameter more than 0.2 mm were not in favor of big size patches. (4)the shrub canopy area were weak negatively related with the moss crust patch size, and organic matter, total nitrogen, available potassium and soluble calcium were positive related with patch size, these were similar to the results of regional scale.
中文关键词	藓类结皮 ; 斑块面积 ; 冠幅 ; 土壤粒径 ; 土壤化学属性 ; 古尔班通古特沙漠
英文关键词	moss crust patch size canopy area soil particles soil chemical properties Gurbantunggut Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4995027
来源机构	中国科学院新疆生态与地理研究所 ; 石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230678
作者单位	1.石河子大学, 石河子, 新疆 832000, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830000, 中国
推荐引用方式 GB/T 7714	吉雪花,张元明,陶冶,等. 藓类结皮斑块面积与环境因子的关系[J]. 中国科学院新疆生态与地理研究所, 石河子大学,2013,33(6):1803-1809.
APA	吉雪花,张元明,陶冶,周小兵,&张静.(2013).藓类结皮斑块面积与环境因子的关系.中国沙漠,33(6),1803-1809.
MLA	吉雪花,et al."藓类结皮斑块面积与环境因子的关系".中国沙漠 33.6(2013):1803-1809.