The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation

	The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation
	Zhang, Chunhui 1,2; Willis, Charles G.3; Burghardt, Liana T.4; Qi, Wei 1; Liu, Kun 1; de Moura Souza-Filho, Paulo Roberto 5; Ma, Zhen 2; Du, Guozhen 1
刊名	new phytologist
	2014-11-01
卷号	204 期号:3 页码:496-506
关键词	community assembly competition phylogenetic community structure phylogenetic diversity phylogenetic signal resource limitation temporal niche Tibetan Plateau
ISSN号	0028-646x
中文摘要	within a community, species may germinate at different times so as to mitigate competition and to take advantage of different aspects of the seasonal environment (temporal niche differentiation). we illustrated a hypothesis of the combined effects of abiotic and biotic competitive factors on germination timing and the subsequent upscale effects on community assembly. we estimated the germination timing (gt) for 476 angiosperm species of the eastern tibetan plateau grasslands under two light treatments in the field: high (i.e. natural) light and low light. we also measured the shift in germination timing (sgt) across treatments for all species. furthermore, we used phylogenetic comparative methods to test if gt and sgt were associated with seed mass, an important factor in competitive interactions. we found a significant positive correlation between gt and seed mass in both light treatments. additionally, small seeds (early germinating seeds) tended to germinate later and large seeds (late germinating seeds) tended to germinate earlier under low light vs high light conditions. low light availability can reduce temporal niche differentiation by increasing the overlap in germination time between small and large seeds. in turn, reduced temporal niche differentiation may increase competition in the process of community assembly.
英文摘要	within a community, species may germinate at different times so as to mitigate competition and to take advantage of different aspects of the seasonal environment (temporal niche differentiation). we illustrated a hypothesis of the combined effects of abiotic and biotic competitive factors on germination timing and the subsequent upscale effects on community assembly. we estimated the germination timing (gt) for 476 angiosperm species of the eastern tibetan plateau grasslands under two light treatments in the field: high (i.e. natural) light and low light. we also measured the shift in germination timing (sgt) across treatments for all species. furthermore, we used phylogenetic comparative methods to test if gt and sgt were associated with seed mass, an important factor in competitive interactions. we found a significant positive correlation between gt and seed mass in both light treatments. additionally, small seeds (early germinating seeds) tended to germinate later and large seeds (late germinating seeds) tended to germinate earlier under low light vs high light conditions. low light availability can reduce temporal niche differentiation by increasing the overlap in germination time between small and large seeds. in turn, reduced temporal niche differentiation may increase competition in the process of community assembly.
WOS标题词	science & technology ; life sciences & biomedicine
类目[WOS]	plant sciences
研究领域[WOS]	plant sciences
关键词[WOS]	emergence time ; alpine meadow ; life-history ; rain-forest ; phylogenetic conservatism ; comparative biology ; functional traits ; plant diversity ; size variation ; climate-change
收录类别	SCI
语种	英语
WOS记录号	WOS:000343869000010
公开日期	2014-12-19
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/4178]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
作者单位	1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Sch Life Sci, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China 3.Harvard Univ, Ctr Environm, Cambridge, MA 02138 USA 4.Duke Univ, Dept Biol, Durham, NC 27708 USA 5.Univ Estadual Paulista, Dept Bot, BR-13506125 Sao Paulo, Brazil
推荐引用方式 GB/T 7714	Zhang, Chunhui,Willis, Charles G.,Burghardt, Liana T.,et al. The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation[J]. new phytologist,2014,204(3):496-506.
APA	Zhang, Chunhui.,Willis, Charles G..,Burghardt, Liana T..,Qi, Wei.,Liu, Kun.,...&Du, Guozhen.(2014).The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation.new phytologist,204(3),496-506.
MLA	Zhang, Chunhui,et al."The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation".new phytologist 204.3(2014):496-506.