Density dependence and habitat preference shape seedling survival in a subtropical forest in central China

doi:10.1093/jpe/rtv006

CORC > 武汉植物园 > 中国科学院武汉植物园

	Density dependence and habitat preference shape seedling survival in a subtropical forest in central China
	Lu, Junmeng 1,2; Johnson, Daniel J.3; Qiao, Xiujuan 1; Lu, Zhijun 1; Wang, Qinggang 1; Jiang, Mingxi 1
刊名	JOURNAL OF PLANT ECOLOGY
	2015-12-01
卷号	8 期号:6 页码:568-577
关键词	generalized linear mixed models negative density dependence niche partitioning phylodiversity seedling dynamics species coexistence
ISSN号	1752-9921
DOI	10.1093/jpe/rtv006
英文摘要	Seedlings are vulnerable to many kinds of fatal abiotic and biotic agents, and examining the causes of seedling dynamics can help understand mechanisms of species coexistence. To disentangle the relative importance of neighborhood densities, habitat factors and phylogenetic relatedness on focal seedling survival, we monitored the survival of 5306 seedlings of 104 species > 15 months. We address the following questions: (i) How do neighborhood densities, habitat variables and phylogenetic relatedness affect seedling survival? What is the relative importance of conspecific densities, habitat variables and phylogenetic relatedness to seedling survival? (ii) Does the importance of the neighborhood densities, habitat variables and phylogenetic relatedness vary among growth forms, leaf habits or dispersal modes? Specially, does the conspecific negative density dependence inhibit tree and deciduous seedlings more compared with shrub and evergreen species? Does density dependence affect the wind and animal-dispersed species equally? We established 135 census stations to monitor seedling dynamics in a 25-ha subtropical forest plot in central China. Conspecific and heterospecific seedling density in the 1-m(2) seedling plot and adult basal area within a 20-m radius provided neighborhood density variables. Mean elevation, convexity and aspect of every 5- x 5-m grid with seedling plots were used to quantify habitat characteristics. We calculated the relative average phylodiversity between focal seedling and heterospecific neighbors to quantify the species relatedness in the neighborhood. Eight candidate generalized linear mixed models with binominal error distribution were used to compare the relative importance of these variables to seedling survival. Akaike's information criteria were used to identify the most parsimonious models. At the community level, both the neighborhood densities and phylogenetic relatedness were important to seedling survival. We found negative effects of increasing conspecific seedlings, which suggested the existence of species-specific density-dependent mortality. Phylodiversity of heterospecific neighbors was negatively related to survival of focal seedlings, indicating similar habitat preference shared among phylogenetically closely related species may drive seedling survival. The relative importance of neighborhood densities, habitat variables and phylogenetic relatedness varied among ecological guilds. Conspecific densities had significant negative effect for deciduous and wind-dispersed species, and marginally significant for tree seedlings > 10cm tall and animal-dispersed species. Habitat variables had limited effects on seedling survival, and only elevation was related to the survival of evergreen species in the best-fit model. We conclude that both negative density-dependent mortality and habitat preference reflected by the phylogenetic relatedness shape the species coexistence at seedling stage in this forest.
资助项目	National Natural Science Foundation of China[31070465] ; National Natural Science Foundation of China[31200329] ; Chinese Forest Biodiversity Monitoring Network[29200931131101919]
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000366390400002
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/174]
专题	中国科学院武汉植物园
通讯作者	Jiang, Mingxi
作者单位	1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Dept Life Sci, Beijing 100049, Peoples R China 3.Yale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511 USA
推荐引用方式 GB/T 7714	Lu, Junmeng,Johnson, Daniel J.,Qiao, Xiujuan,et al. Density dependence and habitat preference shape seedling survival in a subtropical forest in central China[J]. JOURNAL OF PLANT ECOLOGY,2015,8(6):568-577.
APA	Lu, Junmeng,Johnson, Daniel J.,Qiao, Xiujuan,Lu, Zhijun,Wang, Qinggang,&Jiang, Mingxi.(2015).Density dependence and habitat preference shape seedling survival in a subtropical forest in central China.JOURNAL OF PLANT ECOLOGY,8(6),568-577.
MLA	Lu, Junmeng,et al."Density dependence and habitat preference shape seedling survival in a subtropical forest in central China".JOURNAL OF PLANT ECOLOGY 8.6(2015):568-577.