干旱区生态环境知识资源中心(Arid): Extreme drought has limited effects on soil seed bank composition in desert grasslands

Arid

DOI	10.1111/jvs.13089
	Extreme drought has limited effects on soil seed bank composition in desert grasslands
	Loydi, Alejandro; Collins, Scott L.
通讯作者	Loydi, A (corresponding author), CONICET UNS, Ctr Recursos Nat Renovables Zona Semiarida CERZOS, Camino Carrindanga,Km 7 E1 B8000CPB, Bahia Blanca, Buenos Aires, Argentina.
来源期刊	JOURNAL OF VEGETATION SCIENCE
ISSN	1100-9233
EISSN	1654-1103
出版年	2021
卷号	32 期号:5
英文摘要	Question Does climate change affect vegetation and seed bank composition in desert grasslands? Location Sevilleta National Wildlife Refuge, New Mexico, USA. Methods Vegetation and seed bank species composition were recorded in black grama (Bouteloua eriopoda) and blue grama (Bouteloua gracilis) grasslands. At each site, two rainfall manipulations and ambient controls were established in 2013 (n = 10). Treatments included extreme drought (-66% rainfall reduction during the growing season) and delayed monsoon (precipitation captured during July-August and reapplied in September-October). Above-ground species composition was assessed, and composite soil samples were collected in 2017, five years after the experiment started. Seed bank was evaluated using the seedling emergence method. Results Rainfall treatments increased the above-ground vegetation and seed bank richness in the blue grama community, but not in the black grama community. Vegetation cover was reduced by both rainfall manipulations, but seed bank density increased or remained the same compared with controls. In above-ground vegetation, cover of annual and perennial forbs increased, and dominant perennial grasses decreased under drought. In the soil seed bank, species composition was similar among all treatments and was dominated by annual and perennial forbs. Conclusions The seed bank was more resistant to drought than above-ground vegetation. Because seed banks can enhance long-term community stability, their drought resistance plays an important role in maintaining ecosystem processes during and following drought in these grassland communities.
英文关键词	Black grama (Bouteloua eriopoda) Blue grama (Bouteloua gracilis) delayed monsoon desert grassland extreme drought
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000716232600002
WOS关键词	NET PRIMARY PRODUCTION ; LONG-TERM ; CLIMATE-CHANGE ; GERMINATION STRATEGIES ; RAINFALL MANIPULATIONS ; ECOSYSTEM DYNAMICS ; VEGETATION CHANGE ; ANNUAL PLANTS ; PRECIPITATION ; DIVERSITY
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/2XILL650/373618
作者单位	[Loydi, Alejandro] CONICET UNS, Ctr Recursos Nat Renovables Zona Semiarida CERZOS, Camino Carrindanga,Km 7 E1 B8000CPB, Bahia Blanca, Buenos Aires, Argentina; [Loydi, Alejandro] Univ Nacl Sur, Dept Biol Bloquim & Farm, Bahia Blanca, Buenos Aires, Argentina; [Collins, Scott L.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA
推荐引用方式 GB/T 7714	Loydi, Alejandro,Collins, Scott L.. Extreme drought has limited effects on soil seed bank composition in desert grasslands[J],2021,32(5).
APA	Loydi, Alejandro,&Collins, Scott L..(2021).Extreme drought has limited effects on soil seed bank composition in desert grasslands.JOURNAL OF VEGETATION SCIENCE,32(5).
MLA	Loydi, Alejandro,et al."Extreme drought has limited effects on soil seed bank composition in desert grasslands".JOURNAL OF VEGETATION SCIENCE 32.5(2021).