干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠南缘典型沙垄藻类的时空分布

Arid

	古尔班通古特沙漠南缘典型沙垄藻类的时空分布
其他题名	Spatio-Temporal Distribution of Algae Relating to Biological Soil Crusts in the Gurbantunggut Desert,Xinjiang,China
	张丙昌; 张元明; 王敬竹
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2011
卷号	31 期号:4 页码:919-926
中文摘要	通过研究春、夏、秋3季古尔班通古特沙漠典型沙垄藻类物种多样性、种类组成和生物量的变化,分析了典型沙垄中藻类的时空分布特征。结果表明:①地貌部位和不同土层对物种多样性指数影响极显著(P<0.01);在垂直层次中,藻类物种多样性指数由表及里逐渐降低。②在不同地貌部位和季节中,藻类的种类组成亦表现出一定的差异。垄间低地和背风坡球形藻类和丝状藻类丰富,迎风坡以丝状藻类占优势,垄顶藻类的种类和数量都有明显的下降。③地貌部位、垂直层次和季节对藻类生物量的影响均极显著(P<0.01)。藻类在沙漠典型沙垄的分布具有空间异质性,将影响到生物结皮的发育,使其处于不同的发育阶段,而它们在生物结皮中的地位和作用亦不同。
英文摘要	In spring,summer and autumn of 2007,soil samples were colleted,cultured and identified in the different locations of sand dunes in the Gurbantunggut Desert,northern Xinjiang of China.Algae biomass of soil samples was measured.The spatio-temporal distribution of algae was determined by species diversity,species composition and biomass.The results indicated that:(1)Species diversity was significantly affected by locations of sand dunes and soil layers with different depth(P<0.01).Species diversity of algae in windward and leeward of sand dunes were the most abundant,followed by inter-dune areas,and in top of sand dunes was the lowest.In vertical layers of all sand locations,species diversity of algal declined with the deepening of soil layer.(2)Some differences were observed for algal composition in different locations of sand dunes and in seasons.In inter-dune areas and leeward,coccoid and filamentous algae were abundant;in windward,only filamentous algae were dominant.However,taxa and number of algae decreased obviously in the top of sand dunes.In some locations of sand dunes,some algae were found in different seasons,otherwise,the number of the algae was different,which led to changes of dominant species and common species.Microcoleus vaginatus was the main dominant species in different sand locations.The other dominant species changed in different locations of sand dunes and in seasons.(3)Sand dune locations,layers with different depth and seasons had highly significant effects on algal biomass(P<0.01).For algal biomass,no seasonal changes were observed in the top of sand dunes.However,there were obvious seasonal changes for algal biomass in other sand locations.There was spatio-temporal heterogeneity for algal distribution in sand dunes.Heterogeneity of algal distribution may have some effects on the development of biological soil crusts(BSCs),which may make BSCs be different developmental stages.Algal distribution in different BSCs made the role and status of algae changed.
中文关键词	藻类 ; 时空分布 ; 古尔班通古特沙漠
英文关键词	algae spatio-temporal distribution 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:4235952
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/2XILL650/227535
作者单位	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
推荐引用方式 GB/T 7714	张丙昌,张元明,王敬竹. 古尔班通古特沙漠南缘典型沙垄藻类的时空分布[J]. 中国科学院新疆生态与地理研究所,2011,31(4):919-926.
APA	张丙昌,张元明,&王敬竹.(2011).古尔班通古特沙漠南缘典型沙垄藻类的时空分布.中国沙漠,31(4),919-926.
MLA	张丙昌,et al."古尔班通古特沙漠南缘典型沙垄藻类的时空分布".中国沙漠 31.4(2011):919-926.