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http://dx.doi.org/10.11614/KSL.2013.46.3.429

Effects of Global Warming and Environmental Factors of Light, Soil Moisture, and Nutrient Level on Ecological Niche of Quercus acutissima and Quercus variabilis  

Cho, Kyu-Tae (Department of Biology, Kongju National University)
Jang, Rae-Ha (Department of Biology, Kongju National University)
Lee, Seung-Hyuk (Department of Biology, Kongju National University)
Han, Young-Sub (Department of Biology, Kongju National University)
You, Young-Han (Department of Biology, Kongju National University)
Publication Information
Korean Journal of Ecology and Environment / v.46, no.3, 2013 , pp. 429-439 More about this Journal
Abstract
This study was conducted to determine the changes of the ecological niche breadth and niche overlap of Quercus acutissima and Quercus variabilis under elevated $CO_2$ concentrations and under elevated temperature conditions. We investigated the growth responses by environmental factor, $CO_2$ concentration, air temperature, light, soil moisture and nutrients. Rising $CO_2$ concentration was treated with 1.6 times than control (ambient) and increased temperature with $2.2^{\circ}C$ above the control (ambient) in the glass greenhouse. Ecological niche breadth and niche overlap was calculated the two oak species (Q. acutissima and Q. variabilis), which were cultivated with light, soil moisture and nutrient gradients at four levels. As a result, the ecological niche breadth of Quercus acutissima was determined to be increased under the warming treatment, but decreased under soil moisture and nutrient environments. The ecological niche breadth of Quercus variabilis was increased under light, soil moisture and nutrients of the warming treatment than control. Ecological niche overlap between Quercus acutissima-Quercus variabilis was increased under light of the warming treatment than control, but decreased under soil moisture and nutrient environments. These results means that two oak species are more severe competition in light environments than soil moisture and nutrient environments. According to analyses of the Cluster and PCA, the two oak species were more sensitive react under light environment than to elevated $CO_2$ concentration or elevated temperature.
Keywords
ecological niche breadth; ecological niche overlap; global warming treatment; environmental factor;
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