干旱区生态环境知识资源中心(Arid): Grazing pressure interacts with aridity to determine the development and diversity of biological soil crusts in Patagonian rangelands

Arid

DOI	10.1002/ldr.3465
	Grazing pressure interacts with aridity to determine the development and diversity of biological soil crusts in Patagonian rangelands
	Velasco Ayuso, Sergio 1,2; Onatibia, Gaston R.1,2; Maestre, Fernando T.3,4,5; Yahdjian, Laura 1,2
通讯作者	Velasco Ayuso, Sergio
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2020
卷号	31 期号:4 页码:488-499
英文摘要	Grazing is directly related to land degradation and desertification in global drylands. Grazing impacts on vascular plants, reasonably well-known, depend on its intensity and are modulated by local aridity conditions. However, we do not know how the interplay of grazing intensity and aridity affect biocrusts, topsoil assemblages dominated by cyanobacteria, lichens, and mosses that provide key ecosystem services in drylands. Here, we determined how grazing affects biomass, total cover, and richness of biocrust structural types across a regional aridity gradient in the Patagonian steppe. On average, grazing by sheep reduced biocrust biomass, total cover and richness of structural types by 55, 90, and 59%, respectively. In general, high grazing pressures had a larger impact on biocrusts than moderate or light grazing pressures. For example, biocrust cover was reduced by 85, 89, and 98% by light, moderate, and high grazing pressures, respectively. Although a slightly different response to grazing was observed under low aridity conditions, these more benign climatic conditions did not compensate for the negative effects of trampling by domestic animals on biocrusts. Nonetheless, estimated biocrust recovery rates under medium aridity conditions were faster than previously thought: it took 24, 18, and 58 years to double biocrust biomass, total cover, and richness of structural types. Sheep cannot be just removed in Patagonian rangelands because the production of meat and wool represents the main local economic activity. But landowners must consider our results to protect the ecosystem functions and services provided by biocrusts for future generations to come.
英文关键词	aridity biocrusts grazing intensity Patagonian steppe recovery rates
类型	Article
语种	英语
国家	Argentina ; Spain
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000512780900007
WOS关键词	SPATIAL-DISTRIBUTION ; COMMUNITY STRUCTURE ; RECOVERY RATES ; ECOSYSTEM ; DESERT ; MONTE ; DISTURBANCE ; VEGETATION ; SIZE ; CYANOBACTERIA
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315123
作者单位	1.Univ Buenos Aires, Fac Agron, Catedra Ecol, Ave San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina; 2.Univ Buenos Aires, Fac Agron, Inst Invest Fisiol & Ecol Vinculadas Agr, Buenos Aires, DF, Argentina; 3.Univ Rey Juan Carlos, Escuela Super Ciencias Expt & Tecnol, Dept Biol & Geol Fis & Quim Inorgan, Mostoles, Spain; 4.Univ Alicante, Dept Ecol, San Vicente Del Raspeig, Spain; 5.Univ Alicante, Inst Multidisciplinar El Estudio Medio Ramon Marg, San Vicente Del Raspeig, Spain
推荐引用方式 GB/T 7714	Velasco Ayuso, Sergio,Onatibia, Gaston R.,Maestre, Fernando T.,et al. Grazing pressure interacts with aridity to determine the development and diversity of biological soil crusts in Patagonian rangelands[J],2020,31(4):488-499.
APA	Velasco Ayuso, Sergio,Onatibia, Gaston R.,Maestre, Fernando T.,&Yahdjian, Laura.(2020).Grazing pressure interacts with aridity to determine the development and diversity of biological soil crusts in Patagonian rangelands.LAND DEGRADATION & DEVELOPMENT,31(4),488-499.
MLA	Velasco Ayuso, Sergio,et al."Grazing pressure interacts with aridity to determine the development and diversity of biological soil crusts in Patagonian rangelands".LAND DEGRADATION & DEVELOPMENT 31.4(2020):488-499.