Detecting Growth Phase Shifts Based on Leaf Trait Variation of a Canopy Dipterocarp Tree Species (Parashorea chinensis) | |
Deng, Yun1,3,4; Deng, Xiaobao3,4; Dong, Jinlong3,4; Zhang, Wenfu3,4; Hu, Tao1,4; Nakamura, Akihiro4; Song, Xiaoyang4; Fu, Peili4; Cao, Min4 | |
刊名 | FORESTS |
2020 | |
卷号 | 11期号:11页码:_ |
关键词 | ontogenetic phases adaptive strategies leaf functional traits light environment canopy tree species |
ISSN号 | 1999-4907 |
DOI | 10.3390/f11111145 |
英文摘要 | Canopy species need to shift their adaptive strategy to acclimate to very different light environments as they grow from seedlings in the understory to adult trees in the canopy. However, research on how to quantitively detect ecological strategy shifts in plant ontogeny is scarce. In this study, we hypothesize that changes in light and tree height levels induce transitions in ecological strategies, and growth phases representing different adaptive strategies can be classified by leaf trait variation. We examined variations in leaf morphological and physiological traits across a vertical ambient light (represented by the transmittance of diffuse light, %TRANS) and tree height gradient in Parashorea chinensis, a large canopy tree species in tropical seasonal rainforest in Southwestern China. Multivariate regression trees (MRTs) were used to detect the split points in light and height gradients and classify ontogenetic phases. Linear piecewise regression and quadratic regression were used to detect the transition point in leaf trait responses to environmental variation and explain the shifts in growth phases and adaptive strategies. Five growth phases of P. chinensis were identified based on MRT results: (i) the vulnerable phase, with tree height at less than 8.3 m; (ii) the suppressed phase, with tree height between 8.3 and 14.9 m; (iii) the growth release phase, with tree height between 14.9 and 24.3 m; (iv) the canopy phase, with tree height between 24.3 and 60.9 m; and (v) the emergent phase, with tree height above 60.9 m. The suppressed phase and canopy phase represent "stress-tolerant" and "competitive" strategies, respectively. Light conditions drive the shift from the "stress-tolerant" to the "competitive" strategy. These findings help us to better understand the regeneration mechanisms of canopy species in forests. |
学科主题 | Forestry |
语种 | 英语 |
WOS记录号 | WOS:000593325700001 |
内容类型 | 期刊论文 |
源URL | [http://ir.xtbg.org.cn/handle/353005/11917] |
专题 | 西双版纳热带植物园_支撑系统 |
作者单位 | 1.Chinese Acad Sci, Core Bot Gardens, Ctr Plant Ecol, Mengla 666303, Menglun, Peoples R China 2.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Natl Forest Ecosyst Res Stn Xishuangbanna, Mengla 666303, Menglun, Peoples R China 3.Univ Chinese Acad Sci, Dept Life Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Mengla 666303, Menglun, Peoples R China |
推荐引用方式 GB/T 7714 | Deng, Yun,Deng, Xiaobao,Dong, Jinlong,et al. Detecting Growth Phase Shifts Based on Leaf Trait Variation of a Canopy Dipterocarp Tree Species (Parashorea chinensis)[J]. FORESTS,2020,11(11):_. |
APA | Deng, Yun.,Deng, Xiaobao.,Dong, Jinlong.,Zhang, Wenfu.,Hu, Tao.,...&Cao, Min.(2020).Detecting Growth Phase Shifts Based on Leaf Trait Variation of a Canopy Dipterocarp Tree Species (Parashorea chinensis).FORESTS,11(11),_. |
MLA | Deng, Yun,et al."Detecting Growth Phase Shifts Based on Leaf Trait Variation of a Canopy Dipterocarp Tree Species (Parashorea chinensis)".FORESTS 11.11(2020):_. |
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