Publications by authors named "Takahisa Maeda"
Article Synopsis
- The nitrogen isotopic composition of nitrogen oxide (NOx) helps identify its sources and sinks, but many collection methods lack proper evaluation of efficiency and contamination.
- A new method using a hydrogen peroxide and sodium hydride solution achieves over 90% collection efficiency with a low blank and offers a reliable way to analyze nitrogen isotopic composition in a short time.
- The study found that vehicle exhaust is the primary source of NOx in the monitored areas of Yoyogi and Tsukuba in Japan, revealing average δ15N(NOx) values of (-2.7 ± 1.8) ‰ and (-1.7 ± 0.9) ‰, respectively.
The typical seasonally dry forests in Southeast Asia are the mixed deciduous forest (MDF), dry dipterocarp (deciduous) forest (DDF), and dry evergreen forest (DEF). We obtained 21 physiological traits in the top/sunlit leaves of 107, 65 and 51 tree species in MDF, DEF and DDF, respectively. Approximately 70%, 95% and 95% of canopy tree species which consist of MDF, DEF and DDF are sampled, respectively.
View Article and Find Full Text PDFIn tropical dry forests, uppermost-canopy leaves of evergreen trees possess the ability to use water more conservatively compared with drought-deciduous trees, which may result from significant differences in the photoprotective mechanisms between functional types. We examined the seasonal variations in leaf gas exchange, chlorophyll fluorescence and the amounts of photosynthetic pigments within lamina of the uppermost-canopy leaves of three drought-deciduous trees (Vitex peduncularis Wall., Xylia xylocarpa (Roxb.
View Article and Find Full Text PDFThis study compared leaf gas exchange, leaf hydraulic conductance, twig hydraulic conductivity and leaf osmotic potential at full turgor between two drought-deciduous trees, Vitex peduncularis Wall. and Xylia xylocarpa (Roxb.) W.
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