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DOI	10.1016/j.foreco.2020.117900
	Are photosynthetic leaf traits related to the first-year growth of tropical tree seedlings? A light-induced plasticity test in a secondary forest enrichment planting
	dos Santos V.A.H.F.; Ferreira M.J.
发表日期	2020
ISSN	0378-1127
卷号	460
英文摘要	Understanding light-induced plasticity of growth and its relationship with photosynthetic trait plasticity is central to the identification of the mechanisms associated with tropical tree seedling establishment in enrichment plantings. In a secondary forest submitted to silvicultural treatments – that manipulate light environment – and enriched with six tropical tree species we tested three main hypothesis. First, the growth of the six species are related to photosynthetic leaf traits; second, there is a relationship between the light-induced plasticity of growth and photosynthetic leaf traits and, finally, that growth plasticity is a subjacent mechanism of the growth-survival trade-off. Growth was analyzed as a biomass index that combines collar and height growth. Photosynthetic leaf traits were selected considering their significance in the photosynthetic process: light interception (specific leaf area, SLA), light absorption (chlorophyll a and b ratio, Chla/b), light use (fluorescence parameters, Fv/Fm; PIabs, PItotal), biochemical limitations (light-saturated CO2 assimilation, Asat) and diffusive limitations (stomatal conductance, gs). The plasticity was represented by the slope of the relationship between the canopy light transmittance and growth and the photosynthetic leaf traits. At the end of the first year after planting, growth was related to almost all photosynthetic leaf traits, and the strongest relationships (high slope and R2) were observed with Asat, SLA and PItotal. Light-induced growth plasticity varied three times between species. The interspecific growth plasticity was related to SLA and Fv/Fm plasticity, which varied 4.9 and 2.4 times between species, respectively. Seedling mortality in the shaded understory and the growth in a high light environment were associated with growth plasticity. Photosynthetic leaf traits effectively represent the growth response mechanisms to silvicultural treatments that manipulate the light environment in enrichment plantings, and the subjacent mechanism of growth plasticity has an intrinsic effect on the growth-survival trade-off. © 2020 Elsevier B.V.
英文关键词	Amazon; Growth-survival trade-off; JIP-test; Photosynthesis; Silvicultural treatments
语种	英语
scopus关键词	Economic and social effects; Light absorption; Photosynthesis; Plants (botany); Plasticity testing; Tropics; Amazon; Biochemical limitations; Fluorescence parameters; Photosynthetic traits; Silvicultural treatments; Stomatal conductance; Trade off; Tropical tree species; Forestry; absorption; biomass; growth; growth response; interception; mortality; photosynthesis; secondary forest; seedling establishment; silviculture; survival; testing method; trade-off; tree; understory; Forestry; Growth; Light Absorption; Photosynthesis; Plasticity; Slope; Trees; Tropics; Amazonia
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155472
作者单位	Coordination of Environmental Dynamics, National Institute of Amazon Researches, Manaus, Amazonas, Brazil; Department of Forest Sciences, Federal University of Amazonas, Manaus, Amazonas, Brazil
推荐引用方式 GB/T 7714	dos Santos V.A.H.F.,Ferreira M.J.. Are photosynthetic leaf traits related to the first-year growth of tropical tree seedlings? A light-induced plasticity test in a secondary forest enrichment planting[J],2020,460.
APA	dos Santos V.A.H.F.,&Ferreira M.J..(2020).Are photosynthetic leaf traits related to the first-year growth of tropical tree seedlings? A light-induced plasticity test in a secondary forest enrichment planting.Forest Ecology and Management,460.
MLA	dos Santos V.A.H.F.,et al."Are photosynthetic leaf traits related to the first-year growth of tropical tree seedlings? A light-induced plasticity test in a secondary forest enrichment planting".Forest Ecology and Management 460(2020).