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

NWIPB OpenIR

	The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation
	Zhang, Chunhui ; Willis, Charles G. ; Burghardt, Liana T. ; Qi, Wei ; Liu, Kun ; de Moura Souza-Filho, Paulo Roberto ; Ma, Zhen ; Du, Guozhen
	2014-11-01
发表期刊	NEW PHYTOLOGIST ; Zhang, CH; Willis, CG; Burghardt, LT; Qi, W; Liu, K; Souza, PRM; Ma, Z; Du, GZ.The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation,NEW PHYTOLOGIST,2014,204(3):496
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.; 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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/57666
专题	中国科学院西北高原生物研究所
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, Zhang, CH; Willis, CG; Burghardt, LT; Qi, W; Liu, K; Souza, PRM; Ma, Z; Du, GZ.The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation,NEW PHYTOLOGIST,2014,204(3):496,2014.
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.
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 (2014).