干旱区生态环境知识资源中心(Arid): Grazing impact on structure and dynamics of bare soil areas in a Patagonian grass-shrub steppe

Arid

DOI	10.1016/j.jaridenv.2020.104197
	Grazing impact on structure and dynamics of bare soil areas in a Patagonian grass-shrub steppe
	Biancari, Lucio; Aguiar, Martin R.; Cipriotti, Pablo A.
通讯作者	Biancari, L
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	179
英文摘要	Bare soil is an idiosyncratic and important feature of arid ecosystems that can be affected by human land use such as domestic grazing intensification. Here we focused on the study of individual bare soil areas (BSA) and their long-term dynamics using DINVEG (spatially-explicit simulation model). In Patagonian rangelands we photographed BSA in grazed and ungrazed stands (n = 50). Compared with exclosure, grazing increased the size of the BSAs (17%, p < 0.05) and produced less irregular forms (13%, p < 0.05). The number of plants that delimit BSAs were not different (similar to 9), but under grazing the sum of spaces among plants (BSA opening) was 15% higher than in exclosure (p < 0.05). The difference in wind speed (center-edge of the BSA) increased 70% under grazing. Wind difference was poorly correlated with the BSAs structure variables. Simulations (200 years) with DINVEG indicated that grazing decreased the likelihood of BSAs being colonized by grasses and increased the proportion of bare soil cells. Our study suggests that in these Patagonian steppes domestic grazing promotes structural changes in individual BSA and in the transition to grass covered patches. Changes in wind speed may result from grazing effect at the whole vegetation mosaic since BSA features are not enough to explain differences.
英文关键词	Interpatch Desertification Grazing Vegetation patterns Vegetation processes Individual-based models
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000533505000006
WOS关键词	SPATIAL VEGETATION PATTERNS ; ABOVEGROUND PRODUCTION ; SEED DISTRIBUTION ; PLANT-PATTERNS ; WIND ; MANAGEMENT ; EROSION ; WATER ; DESERTIFICATION ; CONNECTIVITY
WOS类目	Ecology ; 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/2XILL650/324467
作者单位	[Biancari, Lucio; Aguiar, Martin R.; Cipriotti, Pablo A.] Univ Buenos Aires, Fac Agron, IFEVA, CONICET, Av San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina; [Biancari, Lucio; Aguiar, Martin R.] Univ Buenos Aires, Fac Agron, Dept Recursos Nat & Ambiente, Catedra Ecol, Av San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina; [Cipriotti, Pablo A.] Univ Buenos Aires, Fac Agron, Dept Metodos Cuantitativos & Sistemas Informac, Av San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Biancari, Lucio,Aguiar, Martin R.,Cipriotti, Pablo A.. Grazing impact on structure and dynamics of bare soil areas in a Patagonian grass-shrub steppe[J],2020,179.
APA	Biancari, Lucio,Aguiar, Martin R.,&Cipriotti, Pablo A..(2020).Grazing impact on structure and dynamics of bare soil areas in a Patagonian grass-shrub steppe.JOURNAL OF ARID ENVIRONMENTS,179.
MLA	Biancari, Lucio,et al."Grazing impact on structure and dynamics of bare soil areas in a Patagonian grass-shrub steppe".JOURNAL OF ARID ENVIRONMENTS 179(2020).