干旱区生态环境知识资源中心(Arid): Continuous grazing disrupts desert grass-soil seed bank composition under variable rainfall

Arid

DOI	10.1007/s11258-020-01102-4
	Continuous grazing disrupts desert grass-soil seed bank composition under variable rainfall
	Marone, Luis; Pol, Rodrigo G.
通讯作者	Marone, L (corresponding author), Consejo Nacl Invest Cient & Tecn, IADIZA, Inst Argentino Invest Zonas Aridas, Ecodes, CC 507, RA-5500 Mendoza, Argentina.
来源期刊	PLANT ECOLOGY
ISSN	1385-0237
EISSN	1573-5052
出版年	2021
卷号	222 期号:2 页码:247-259
英文摘要	Long-term field studies help unveil mechanisms of grass soil seed bank (SSB) persistence and resilience. We wonder whether grazing is a disruptive force that changes grass SSB composition and size, while heavy rainfall is a positive bottom-up force that restores the grass SSB in grazed areas of the Monte desert, Argentina. We used core sampling to study the grass SSB in cattle-free (17 year) and grazed (10 year) grasslands. The SSB size in cattle-free sites usually responded in a continuous positive fashion to rainfall, and the proportion of palatable grasses in the SSB was similar among years. Most grass species formed a transient SSB, but the presence of a stand of perennial plants would prevent their local extinction. In contrast, the SSB size in the grazed habitats showed a threshold response to rainfall (i.e. it did not increase under low-moderate rainfall), the seeds of palatable grasses were always scarce, and the proportion of seeds of less palatable grasses increased under extreme rainy conditions. Seed production from grasses that grew tillers from axillary buds during a drought was zero, suggesting that the bank of plants could have a role in the replenishment of the grass SSB only in mesic years. Within the time span assessed here, continuous heavy grazing together with scarce as well as heavy rainfall were disruptive forces that reduced the number and proportion of seeds from palatable grasses in the SSB, which are also the species preferred by seed-eating animals.
英文关键词	Long-term study Soil seed bank persistence Vegetation soil-seed bank correlation Semiarid rangelands Plant regrowth Post-dispersal seed-eaters
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000604150900001
WOS关键词	CENTRAL MONTE DESERT ; PERENNIAL GRASSES ; SUCCESSIVE WET ; TOP-DOWN ; FLEXIBILITY ; HIERARCHY ; RESPONSES ; ECOLOGY
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348094
作者单位	[Marone, Luis; Pol, Rodrigo G.] Consejo Nacl Invest Cient & Tecn, IADIZA, Inst Argentino Invest Zonas Aridas, Ecodes, CC 507, RA-5500 Mendoza, Argentina; [Marone, Luis; Pol, Rodrigo G.] UNCuyo, Fac Ciencias Exactas & Nat, Mendoza, Argentina
推荐引用方式 GB/T 7714	Marone, Luis,Pol, Rodrigo G.. Continuous grazing disrupts desert grass-soil seed bank composition under variable rainfall[J],2021,222(2):247-259.
APA	Marone, Luis,&Pol, Rodrigo G..(2021).Continuous grazing disrupts desert grass-soil seed bank composition under variable rainfall.PLANT ECOLOGY,222(2),247-259.
MLA	Marone, Luis,et al."Continuous grazing disrupts desert grass-soil seed bank composition under variable rainfall".PLANT ECOLOGY 222.2(2021):247-259.