干旱区生态环境知识资源中心(Arid): 科尔沁沙地恢复演替进程中群落物种多样性与地上生物量的关系

Arid

	科尔沁沙地恢复演替进程中群落物种多样性与地上生物量的关系
其他题名	Relationship between the aboveground biomass and species diversity of sandy communities during the process of restoring succession in the Horqin Sandy Land, China
	赵丽娅 1; 高丹丹 1; 熊炳桥 1; 陈涛 1; 李艳蔷 1; 李锋瑞 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2017
卷号	37 期号:12 页码:4108-4117
中文摘要	生物多样性与生产力的关系是当前生态学中研究的重点之一,以科尔沁沙地为研究对象,研究了沙地植被恢复演替进程中物种多样性与地上生物量的关系。结果表明:(1)科尔沁沙地植被恢复演替过程中,物种数量逐渐增加,从流动沙丘的6种到固定沙丘的30种,增加了4倍。一年生草本植物在各群落中占绝对优势,但随着演替的进行,生活型呈现多样化,多年生植物种类明显增加。藜科植物在流动沙丘阶段优势度明显,之后逐渐下降;禾本科植物的种数和优势度逐渐增加,在群落中的地位逐渐增强。多重比较表明,群落的地上生物量存在显著差异(F=18.926,n = 360,P<0.001),从流动沙丘到固定沙丘(3个恢复阶段的均值计算)地上生物量增加了580%。(2)随着演替的进行,群落Simpson指数、Shannon-winner指数和均匀度指数均呈现增加的趋势。(3)回归分析显示,群落物种多样性和生物量之间存在显著的负二次函数关系即单峰型函数关系,表明中等生产力水平物种多样性较高。
英文摘要	The relationship between species diversity and aboveground biomass may be affected by environmental conditions and anthropogenic activities and is one of the central topics in ecological research. However, little is known about the relationship between the biodiversity and biomass of sandy plants during community succession in semi-arid deserts. In the Horqin Sandy Land of Inner Mongolia in China, vegetation restoration occurs under proper management regimes in fragile environmental conditions, e.g., enclosing and non-grazing. During the process of restoring succession, shifting, semishifting or semi-fixed, and fixed sandy dunes correspond to early, middle, and late succession phases. Therefore, a field experiment was performed to examine the aboveground biomass and species diversity of sandy communities during the process of restoring succession. In early April 2014, six communities that corresponded to succession times of 1, 3, 5,12, 15,and 20 years were selected as experimental sites. At each site, three parallel 200m line transects (20 m apart) were established along a sandy dune (across the windward slope,dune crest,and leeward slope). For each transect,20 sampling points of Im * Im were established at 10m intervals. At each of the 360 sampling points, species composition, coverage, height, and density were surveyed; whereas aboveground biomass was measured using a level cutting method, and the dry weight of the biomass was measured after drying in an oven at 85 ℃ for 24 h. The frequency of each species was calculated at each of the six sites, based on the frequency of occurrence among the 60 sampling points. (1) The number of plant species increased by 400% from the shifting sandy dune to the fixed dune, and annual herbaceous plants were dominant in each community, although perennial species increased with succession. In the shifting sandy dune community, the dominance of the Chenopodiaceae was the most exaggerated,and this level of dominance gradually decreased in the semi-fixed and fixed sandy dunes. Meanwhile, the richness and dominance of grass species gradually increased during the process of restoring succession. There was a significant difference among the aboveground biomass of six communities (F = 18.926,n = 360, P< 0.001),and the aboveground biomass increased by 580% from the shifting sandy dune to fixed sandy dune. (2) The Simpson, Shannon-Wiener, and evenness indices gradually increased along the restoring succession gradients. (3) Regression analysis indicated a marked relationship between aboveground biomass and species diversity. The fitting curve was a negative quadratic or a single peak function. The results of the present study support the single-peak model of the relationship between biodiversity and productivity of plant communities,with maximum biodiversity occurring at an intermediate level of plant productivity.
中文关键词	物种多样性 ; 地上生物量 ; 恢复演替 ; 单峰格局
英文关键词	species biodiversity aboveground biomass restoring succession single- peak pattern
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:6015864
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236487
作者单位	1.湖北大学资源环境学院, 武汉, 湖北 430062, 中国; 2.中国科学院西北生态环境资源研究院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵丽娅,高丹丹,熊炳桥,等. 科尔沁沙地恢复演替进程中群落物种多样性与地上生物量的关系[J],2017,37(12):4108-4117.
APA	赵丽娅,高丹丹,熊炳桥,陈涛,李艳蔷,&李锋瑞.(2017).科尔沁沙地恢复演替进程中群落物种多样性与地上生物量的关系.生态学报,37(12),4108-4117.
MLA	赵丽娅,et al."科尔沁沙地恢复演替进程中群落物种多样性与地上生物量的关系".生态学报 37.12(2017):4108-4117.