Leaf Traits of the Saplings of Later Successional Stage Tropical Montane Rain Forest in Hainan Island

doi:10.7525/j.issn.1673-5102.2017.06.014

Abstract

Abstract: Physiological and ecological characteristics of plant greatly affect its distribution pattern and abundance in ecosystem. The objectives of this study are to find differences of leaf traits between dominant species and companion species, and differences among three different layers. By sample-plot survey, leaf traits of six dominant species and nine companion species from three different layers of later successional stage tropical montane rain forest were measured in Hainan Island, by using a Li-6400 portable photosynthesis system. Leaves were sampled to measure its specific leaf area(SLA), leaf nitrogen(LN) and leaf phosphorus(LP). SLA(specific leaf area), A_-mass(light-saturated photosynthetic rate) and Ф(photosynthetic quantum yields) of middle and upper layer species were higher than those of lower layer species, and the upper layer species had a lowest R_d(day-time dark respiration rate) among the three groups. LN and LP of saplings decreased with their mature tree height increasing, and had the order of lower layer species>middle layer species>upper layer species, but there was no significant differences among there groups(P>0.05). Photosynthetic parameters of dominant and companion species were correlated with SLA. LN of companion species was positively correlated with SLA(P<0.01), but their LP was negatively correlated with SLA(P<0.05). But for dominant species, there was no correlation between LN and SLA or LP and SLA(P>0.05).

Key words: tropical montane rain forest, later successional stage, dominant species, companion species, photosynthesis, specific leaf area, leaf nitrogen, leaf phosphorus

CLC Number:

S718.5

ZHANG Ming, LIU Fu-De, AN Shu-Qing, CAO Xue-Zhang. Leaf Traits of the Saplings of Later Successional Stage Tropical Montane Rain Forest in Hainan Island[J]. Bulletin of Botanical Research, 2017, 37(6): 907-914.

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