植物功能性狀於種間與種內變異的重要性之研究：以拉拉山森林動態樣區為例

李以諾

doi:10.6342/NTU202104070

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植物功能性状於种间与种内变异的重要性之研究：以拉拉山森林动态样区为例

Importance of interspecific and intraspecific variation of plant functional traits: a case study in the Lalashan Forest Dynamics Plot

李以诺 , 硕士　　导师：泽大卫　　

英文 DOI： 10.6342/NTU202104070

叶片功能性状；种内性状变异；群落性状加权平均；云雾林；恒风； leaf functional trait ； intraspecific trait variation ； community weighted mean ； montane cloud forest ； chronic wind

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摘要 │ 参考文献 (98) │ 被引用文献 (1) │ 国际计量

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Knowing the community-level trait-environment relations is important for understanding how species and individuals increase their fitness under the environment, and many case studies based on the interspecific trait variation (BTV) has been published. However, recent studies argued that the intraspecific trait variation (ITV) is also important in these relations. Here, we explored the leaf trait of broadleaf trees in the subtropical montane mixed cloud forest of northern Taiwan as an example to answer the following questions: 1) which trait relates to which environmental factor in interspecific and intraspecific level, and what are the possible mechanisms of these relations? 2) what is the relative importance of BTV and ITV in these relations?
The one-hectare Lalashan Forest Dynamics Plot (LFDP, 24°42′ N, 121°26′ E, elevation 1758-1782 m a.s.l.) has been established in a wind-exposed flat ridge. We surveyed all the trees with DBH ≥ 1 cm in 25 10 m × 10 m subplots within LFDP, and measured the leaf traits from 1-3 individuals of every broadleaf woody species occurring in each subplot, including leaf area, leaf thickness, relative chlorophyll content, specific leaf area, leaf dry matter content and leaf succulence. We calculated the site-specific, interspecific and intraspecific level community weighted mean (CWM), and separately linear regressed them against the environmental factors, including convexity, windwardness, conifer basal area, and soil properties. The subsequent variation partitioning was performed to obtain the relative importance of BTV and ITV in those regressions.
We found many trait-environment relations occurred in the intraspecific level. In particular, the leaf thickness and succulence are positively related to the windwardness, specific leaf area is negatively and positively related to the windwardness and conifer basal area, respectively. These may indicate that the tree individuals mitigate the wind-induced physiological impact by adjusting their leaf traits, and the broadleaf trees acclimate to the shading effect by the extruded tree crown of large coniferous trees nearby. Variation partitioning reveals that the ITV can be more important in totally different trait-environment relations than the BTV. 
Our results support the argument that ITV is important in the trait-environment relations. Our findings also agree with the suggestion that considering both BTV and ITV may be necessary in the trait-environment studies, especially in the studies conducted in the small spatial extent (e.g., one-hectare).

参考文献 ( 98 ) 〈TOP〉

Ackerly, D.D., Knight, C.A., Weiss, S.B., Barton, K. and Starmer, K.P. (2002) Leaf size, specific leaf area and microhabitat distribution of chaparral woody plants: contrasting patterns in species level and community level analysis. Oecologia, 130, 449–457.
Albert, C.H., Grassein, F., Schurr, F.M., Vieilledent, G. and Violle, C. (2011) When and how should intraspecific variability be considered in trait-based plant ecology? Perspectives in Plant Ecology, Evolution and Systematics, 13, 217–225.
Ansari, A.Q. and Loomis, W.E. (1959) Leaf temperatures. American Journal of Botany, 46, 713–717.
Baker, D.E. and Amacher, M.C. (1982) Nickel, copper, zinc, and cadmium. In: Page, A.L. et al. (Eds), Methods of Soil Analysis, Part 2: Chemical and Microbiological Properties, 2nd edition. Madison, WI: Soil Science Society of America, Inc. and American Society of Agronomy, Inc., pp. 323–336.
Becker, P., Rabenold, P.E., Idol, J.R. and Smith, A.P. (1988) Water potential gradients for gaps and slopes in a Panamanian tropical moist forest’s dry season. Journal of Tropical Ecology, 4, 173–184.

被引用文献 (1) 〈TOP〉

Ting CHEN;Yi-Nuo LEE;Po-Yu LIN;Kun-Sung WU;David ZELENÝ(2024)。Vegetation of Chamaecyparis montane cloud forest in Lalashan Forest Dynamics Plot。TAIWANIA。69(3)。399-411-s1-10。

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DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。