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Species Diversity, Biomass and Distribution of Epiphytic Lichens in Primary and Secondary Forests in Ailao Mountains, Yunnan

Author: LiSu
Tutor: LiuWenYao
School: Xishuangbanna Tropical Botanical Garden
Course: Ecology
Keywords: Epiphytic lichens Biodiversity Biomass Mountain forest Forest edge Ailaoshan
CLC: Q948
Type: Master's thesis
Year: 2008
Downloads: 130
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Abstract

The epiphytic lichens forest epiphytes taxa, plays an important role in the maintenance of forest ecosystems, species diversity, water circulation and nutrient cycling. Study through the the Ailaoshan area native montane moist evergreen broad-leaved forest, secondary oak coppice and Yunnan davidiana and planted pepper forest epiphytic lichen species composition, biomass and its distribution characteristics and other aspects of the study, the initial distribution pattern of Ailaoshan epiphytic lichens. The results are as follows: 1. The Ailaoshan region forest communities included habitat the clothing and species composition relatively rich. In this study, the trunk positioned sampling survey of 570 different species and diameter of trees from the ground 0.0-2.0 m at the epiphytic lichen composition and distribution, and in 2006-2007 were set up in all sorts of places, 85 epiphytic ground clothing litter collection box, collected a total of 62 kinds of epiphytic lichens, belonging to 29 genera and 17 families, including native forest, oak coppice, Yunnan davidiana and pepper plantations were 53,56,50 and 24 lichen. Communities of epiphytic lichens significantly different from the ground 0.0-2.0 m position; forest canopy, within the community of epiphytic lichens basically similar. More native forest epiphytic lichen species, but the distribution is uneven. Trunk epiphytic lichens Shannon-Wiener and Simpson diversity index oak coppice highest, were 2.71 and 0.89, pepper forest and Dian Shan Yang Lin followed, 2.43-2.45 and 0.88-0.89, respectively, native forests minimum 1.25 and 0.67. Forest age, tree trunks orientation, host species, host diameter class, bark roughness and pH values ??are epiphytic lichen species composition and diversity has an important impact. Secondary forest communities, forest age about 50 years the number of species of more than about 100 years; the epiphytic lichens appeared in trunk south orientation; the Yunnan bilberry (Vaccinium duclouxii) is the most abundant host of epiphytic lichens; DBH trees 5.0-25.0 cm trunk epiphytic lichens more; epiphytic lichens in the number of species and cover with the roughness increases; Yunnan bilberries and shea the Ke trunk epiphytic lichens distribution, respectively, and the pH value of the bark was significant negative correlation and positive correlation. 2. Ailaoshan areas of native forest, oak coppice, rich Yunnan davidiana epiphytic lichens litter biomass is not, to 20.41 kg / ha and 24.54 kg / ha and 21.41 kg / ha, biomass estimation values ??of approximately 145 kg / ha and 133 kg / ha and 96.5 kg / ha; pepper forest epiphytic lichen biomass 642.97-1292.30 kg / ha. Quite different from the composition point of view, native forest, oak sprouted forests and Yunnan Mountains the Yanglin in epiphytic lichens dominant species and dominant genera are basically the same, no significant difference; dominant species in each forest communities occupied ratio . Pepper forest lichen species plummeted, biomass is concentrated in a small number of lichen species trends. Of epiphytic lichens litter peak in different forest communities also there are some differences. Different forest age forest epiphytic lichens Litter biomass was significantly different, stand age of about 50 years of oak coppice than about 100 years rich biomass, Yunnan davidiana contrast. 3. Ailaoshan montane moist evergreen broad-leaved forest, epiphytic lichen species diversity and biomass of litter with the changes in the depth of the forest edge and significant change. Forest edge (5 m plots) has the highest number of epiphytic lichen species and the highest litter biomass, and they decrease with increasing distance from the forest edge. South to the forest edge and North to the the lichen distribution pattern of the forest edge basic, no significant difference. The dominant species of lichen species composition, all plots included basically the same, but individual lichen species appear only in the forest edge. Most lichens on the response to the changes in the depth of the forest edge, and also has a better consistency.

Species Diversity, Biomass and Distribution of Epiphytic Lichens in Primary and Secondary Forests in Ailao Mountains, Yunnan

Abstract

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