干旱区生态环境知识资源中心(Arid): Mind the gap among patches in arid plant communities: rapid root proliferation in response to N addition

Arid

	Mind the gap among patches in arid plant communities: rapid root proliferation in response to N addition
	Reyes Maria Fernanda; Aguiar Martin R
来源期刊	Journal of Plant Ecology
ISSN	1752-9921
出版年	2019
卷号	12 期号:1 页码:89-95
英文摘要	Aims In arid communities, it has been proposed that individual plants can extend their roots beyond their canopy exploring neighbouring bare ground areas. This becomes relevant in systems where the vegetation is distributed in patches surrounded by bare soil. However, whether roots of different species may be overlapping under bare ground areas is still controversial. The factors controlling root responses when no plants appear to be directly influencing the gap among patches are still unclear. The aim of our study was to detect perennial grasses responses to an N enrichment pulse. Methods In a semi-arid steppe(Patagonia, Argentina), we buried root traps filled with sieved soil with and without N addition, under bare soil patches. Traps were harvested after 4 and 6 months. Trap neighbourhoods(30 cm in diameter) included at least three of the dominant tussock species. After harvests, we identified species in the traps by root traits and quantified diversity, biomass and specific relative growth rates. Important Findings Bare ground areas show simultaneous root growth of different species. Diversity of perennial grass roots was higher with N addition than without it in the first harvest(4 months), but this difference disappeared in the second harvest(6 months). Root biomass was maximal after 6 months in N addition traps. Species preferred by herbivores(Bromus pictus and Poa ligularis) showed rapid growth and responses to N addition. Differences between harvests may be an indicative that N pulses interact with rising temperatures and soil water content as growing season progress.
英文关键词	belowground community ecology grass species roots Patagonian steppe patchiness root growth rates zone of influence
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6435210
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336072
作者单位	Reyes Maria Fernanda, Instituto de Investigaciones Fisiologicas y Ecologicas Vinculadas a la Agricultura (IFEVA) and Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad de Buenos Aires, Federal District C1417DSE, Argentina.; Aguiar Martin R, Instituto de Investigaciones Fisiologicas y Ecologicas Vinculadas a la Agricultura (IFEVA) and Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad de Buenos Aires, Federal District C1417DSE, Argentina.
推荐引用方式 GB/T 7714	Reyes Maria Fernanda,Aguiar Martin R. Mind the gap among patches in arid plant communities: rapid root proliferation in response to N addition[J],2019,12(1):89-95.
APA	Reyes Maria Fernanda,&Aguiar Martin R.(2019).Mind the gap among patches in arid plant communities: rapid root proliferation in response to N addition.Journal of Plant Ecology,12(1),89-95.
MLA	Reyes Maria Fernanda,et al."Mind the gap among patches in arid plant communities: rapid root proliferation in response to N addition".Journal of Plant Ecology 12.1(2019):89-95.