干旱区生态环境知识资源中心(Arid): Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China

Arid

DOI	10.1007/s40333-022-0024-x
	Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China
	Kimura, Keiichi; Kono, Akito; Yamada, Susumu; Koyanagi, Tomoyo F.; Okuro, Toshiya
通讯作者	Kimura, K
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2022
卷号	14 期号:8 页码:867-876
英文摘要	Shrub species are used in restoration projects on dryland for their facilitation effects, which include environmental improvements and protection from herbivore feeding. Facilitation effects on forage grasses are potentially important in improving grazing capacity on rangelands. However, the morphology-dependent performance of benefactor plants in facilitating forage species growth and supplementation under moderate grazing intensity remains unclear. Here, our main purpose was to measure facilitation performance in terms of the survival of a native forage grass, Agropyron cristatum (L.) Gaertn. (Gramineae)., in accordance with the growth conditions of a sand-fixing benefactor shrub, Caragana microphylla Lam., in the Hulun Buir Grassland, northern China. Six study sites with patches of A. cristatum and C. microphylla were established at the foot of fixed sand dunes. At each site, five quadrats were set in places where C. microphylla coverage was 100% and A. cristatum grew among the shrubs (shrub quadrats), and another five were set where A. cristatum grew alone without C. microphylla (grass quadrats). We measured the morphological traits of C. microphylla and A. cristatum in all 60 quadrats, along with the soil water content and soil temperature. The data were compared between the shrub and grass quadrats by generalized linear mixed-effect models to assess the shrub's facilitation effects. We also used such models to elucidate the relationship between the average height of C. microphylla and the morphological traits of A. cristatum in the shrub quadrats. The maximum height, average grazed height, and the number of seed heads of A. cristatum were greater in the shrub quadrats than in the grass quadrats. The soil surface temperature was lower in the shrub quadrats. The maximum height and seed head number of A. cristatum were positively associated with the average height of C. microphylla. These results suggest that the grazing impact and heat stress were smaller in shrub quadrats than in grass quadrats, and that the degree of this protective effect depended on the shrub height. The shrub canopy seemed to reduce the increase in soil temperature and keep the grass vigorous. Livestock likely avoided grazing grasses in the C. microphylla patches because of the shrub's spiny leaves; only the upper parts of the grass stems (including the seed heads) protruding from the shrub canopy were grazed. The sand-fixing shrub thus moderates the grazing impact and soil temperature, and contributes to vegetation restoration and grazing system sustainability.
英文关键词	Caragana microphylla dryland ecosystem restoration facilitation grazing impact heat stress
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000840090100003
WOS关键词	POSITIVE INTERACTIONS ; SOIL PROPERTIES ; FACILITATION ; RESTORATION ; PLANTS ; COMMUNITY ; COMPETITION ; MECHANISMS ; NEIGHBORS ; DYNAMICS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393326
推荐引用方式 GB/T 7714	Kimura, Keiichi,Kono, Akito,Yamada, Susumu,et al. Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China[J],2022,14(8):867-876.
APA	Kimura, Keiichi,Kono, Akito,Yamada, Susumu,Koyanagi, Tomoyo F.,&Okuro, Toshiya.(2022).Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China.JOURNAL OF ARID LAND,14(8),867-876.
MLA	Kimura, Keiichi,et al."Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China".JOURNAL OF ARID LAND 14.8(2022):867-876.