干旱区生态环境知识资源中心(Arid): 荒漠草原灌丛沃岛的结构特征和生态效应

Arid

	荒漠草原灌丛沃岛的结构特征和生态效应
其他题名	Structural characteristics and ecological effects of a shrub-fertile island in a desert steppe
	李月飞 1; 陈林1 ; 李学斌 2; 张义凡 1; 杨新国 1
来源期刊	草业科学
ISSN	1001-0629
出版年	2018
卷号	35 期号:10 页码:2327-2335
中文摘要	荒漠草原地区草地的灌丛化使得草地资源空间分布具有异质性,并且灌丛的自持能力也逐渐得到了增加。荒漠草原灌丛沃岛是荒漠草原地区灌木灌丛下限制性土壤资源的显著聚集现象,其中的资源为土壤水分、养分、微生物、动物以及由灌丛带来的非生物环境等的总和。沃岛集聚养分,改善土壤构造,在养分的空间和养分循环中发挥着重要的生态和水文效应,成为许多生物物种,包括草本植物和小型动物的庇护所,这种效应被称之为沃岛效应。沃岛效应的发生很可能促进了灌丛化草地的形成和维持,同时也加速了草原的荒漠化过程。沃岛效应的存在是荒漠草原受损生态恢复与重建的重要基础和依据。学者对于沃岛效应引起的土壤资源的异质性分布研究较深,但对于养分在灌木植物下土壤表层的积累研究较浅。如何把握沃岛效应各个复杂过程中植物、土壤和土壤生物扮演的确切角色,还亟待解决。本文从沃岛的概念和形成机制出发,对沃岛的结构特征和生态效应以及土壤与植被系统的关系进行了总结,对于深入了解沃岛效应的机理具有重要的意义,也对荒漠草原地区的植被演替和恢复重建具有重要的生态学意义,同时也为荒漠草原地区的水土治理提供基础理论。
英文摘要	The conversion from grasslands to shrubberies in desert and grassland areas makes the spatial distribution of grassland resources possess heterogeneity with an increase in the self-sustainability of bushwood.Desert steppe scrub islands are significant aggregations of restricted soil resources under shrubs in desert steppes, among which the resources are the sum of soil moisture,nutrients,microorganisms,animals,and abiotic environment brought by shrubs.Fertile islandsgather nutrients,improve soil structure,and have important ecological and hydrological effects on the space and circulation of nutrients.They are a shelter for many biological species,including herbaceous plants and small animals;this effect is calledfertile islandseffect.The occurrence of thefertile islandeffect probably promotes the formation and maintenance of thicketed grasslands and also accelerates the desertification process of grasslands.The existence of the island effect is an important basis for the restoration and reconstruction of damaged ecology in desert steppes.Scholars have fully studied the heterogeneity distribution of soil resources caused by the island effect,but the study of the accumulation of nutrients in the soil surface layer under shrubs is relatively little.The exact roles played by plants,soil and soil organisms in the complex process offertile islandeffect need to be elucidated.Starting from the concept and formation mechanism of afertile island,this paper summarizes the structural features and ecological effects of fertile islands,as well as the relationship between the soil and vegetation systems.It is important to understand the mechanism offertile islands;they have great ecological significance in the vegetation succession, restoration,and reconstruction in desert steppes.Meanwhile,it also provides the basic theory for soil and water control in desert steppes.
中文关键词	荒漠草原 ; 灌丛 ; 沃岛效应 ; 植被 ; 土壤
英文关键词	desert steppe shrub fertile island effect vegetation soil
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6350199
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237334
作者单位	1.宁夏大学;;宁夏大学;;宁夏大学西部生态与生物资源开发联合研究中心, 西北退化生态系统恢复与重建教育部重点实验室;;宁夏省西北土地退化与生态恢复省部共建国家重点实验室培育基地;;, 银川;;银川;;银川, 宁夏;;宁夏;;宁夏 750021;;750021;;750021, 中国; 2.宁夏大学科学技术处, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	李月飞,陈林,李学斌,等. 荒漠草原灌丛沃岛的结构特征和生态效应[J]. 宁夏大学,2018,35(10):2327-2335.
APA	李月飞,陈林,李学斌,张义凡,&杨新国.(2018).荒漠草原灌丛沃岛的结构特征和生态效应.草业科学,35(10),2327-2335.
MLA	李月飞,et al."荒漠草原灌丛沃岛的结构特征和生态效应".草业科学 35.10(2018):2327-2335.