Species diversity of leaf beetles (Coleoptera: Chrysomelidae) in the primary forest and plantations in Xitou: a potential bioindicator for forest ecosystems
Date Issued
2016
Date
2016
Author(s)
Lee, Yi-Nung
Abstract
The main purpose of this research is to obtain an understanding of species diversity of leaf beetles (Coleoptera: Chrysomelidae) in the different forest environment in Xitou Nature Education Area, and try to estimate the potential of using leaf beetles as bioindicators in forest ecosystems. Four 500 meters transects are set through the plantations (red cypress, Japanese cedar, Moso bamboo, and broad-leaved plantation) and one 500 meters transect are set through the natural broad-leaved forest, and insects are collected by sweeping alone each transect once a month from November 2014 to April 2016. Totally, 1,744 individuals of leaf beetles are collected which belong to 68 species and 45 genera. However, 3 species in natural broad-leaved forest, 4 species in red cypress plantation, 2 species in Moso bamboo plantation, and 5 species in broad-leaved plantation were considered potential bioindicators based on a modified Indicator species analysis. The Shannon‘s diversity index and Pielou’s evenness index are applied in comparing the amount of species and quantity of leaf beetles in the different transects. The result shows that species diversity of leaf beetles are lower in Japanese cadar plantation, but higher in broad-leaved plantation and natural forest. The environmental factors that are related to species diversity of leaf beetles in different forest systems are analyzed by the Redundancy Analysis (RDA). The result shows that the species quantity of understory plants, illumination (including Whole Light Sky Space and Diffuse Non-interceptance) and alttitude of transects have significantly influence on the chrysomelid species assemblages. We offer inventories and potential bioindicator species of leaf beetles of five transects in Xitou Nature Education Area, and discuss the environmental factors that affecting species diversity of leaf beetles in different forest systems.
Subjects
leaf beetle
Chrysomelidae
bioindicator
forest entomology
biodiversity
Type
thesis
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