溪頭二氧化碳通量塔樣區不同層級調查技術相關性分析

Evaluating the Correlations among Different Hierarchies for Investigating at Xitou CO2 Flux Site

衛強(Wei Chiang) ； 陳鏡明(Jing-Ming Chen) ； 鄭景鵬(Ching-Pong Cheng) ； 江博能(Po-Neng Chiang) ； 賴彥任(Yen-Jen Lai) ； 洪志遠(Chih-Yuan Hong) ； 余瑞珠(Jui-Chu Yu) ； 魏聰輝(Tsong-Hue Wey) ； 張振生(Cheng-Sheng Chang) ； 蔡明哲(Ming-Jer Tsai) ； 王亞男(Ya-Nan Wang)

《中華林學季刊》 46卷3期 (2013/09) Pp. 357-375

摘要

This study focused on the CO2 flux site of Cryptomeria japonica plantation located in Xitou Tract of NTUEF (hereafter refer red as NTUEF) to analyze the relationship between stock, Leaf Area Index (LAI), Clumping Index (CI) and Vegetation Index (VI) derived from satellite imagery at different levels as the future basis for estimating the carbon sequestration. SPOT satellite imagery in 2011 was collected to derive the NDVI value, CI, LAI measure d by fisheye lens and TRAC were then to correlate with the stock. The preliminary result showed that it was feasible to correlate the stock with investigating different levels, however, there existed different relationships at these levels: the average stock around the center of CO2 flux tower was 923.23 m^3 ha^(-1), the correlation coefficient (r) between stock and NDVI in 64 small plots and 16 large plots were 0.430 (p ＜ 0.001) and 0.581 (p ＜ 0.05), respectively. LAI measured in core plots by fisheye lens correlated negatively with stock both in subplot and plot scale, correlation coefficient were -0.614 (p ＜ 0.01) and -0.714 (p = 0.286), respectively. The results indicated that the sample site was a mature stand of Cryptomeria japonica and its growth exceeded the ideal rotation age; stock, NDVI and LAI existed different variation in spatial scale.

關鍵字

二氧化碳通量 ； 蓄積量 ； 葉面積指數 ； 聚集指數 ； 植生指數

並列摘要

This study focused on the CO2 flux site of Cryptomeria japonica plantation located in Xitou Tract of NTUEF (hereafter refer red as NTUEF) to analyze the relationship between stock, Leaf Area Index (LAI), Clumping Index (CI) and Vegetation Index (VI) derived from satellite imagery at different levels as the future basis for estimating the carbon sequestration. SPOT satellite imagery in 2011 was collected to derive the NDVI value, CI, LAI measure d by fisheye lens and TRAC were then to correlate with the stock. The preliminary result showed that it was feasible to correlate the stock with investigating different levels, however, there existed different relationships at these levels: the average stock around the center of CO2 flux tower was 923.23 m^3 ha^(-1), the correlation coefficient (r) between stock and NDVI in 64 small plots and 16 large plots were 0.430 (p ＜ 0.001) and 0.581 (p ＜ 0.05), respectively. LAI measured in core plots by fisheye lens correlated negatively with stock both in subplot and plot scale, correlation coefficient were -0.614 (p ＜ 0.01) and -0.714 (p = 0.286), respectively. The results indicated that the sample site was a mature stand of Cryptomeria japonica and its growth exceeded the ideal rotation age; stock, NDVI and LAI existed different variation in spatial scale.

並列關鍵字

carbon dioxide flux ； stock ； leaf area index ； clumping index ； vegetation index