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Evaluation of possible causes for the decline of Japanese cedar (Cryptomeria japonica) based on elemental composition and delta13C of needles

Article Abstract:

Water stress related to dry atmospheric conditions and potentially ambient ozone exposure is hypothesized to be the main cause of the decline of Japanese cedar (Cryptomeria japonica). This was gleaned from the higher levels of delta13C observed in needles from sites with a high level of decline and in needles from the upper crown of declining trees. Soil acidification was ruled out since needles from declining trees did not show the concentration of these elements that would be expected if such were the case.

Physiological aspects, Trees, Trees (Plants), Soil acidification

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Evaluating possible causes for the decline of Japanese fir (Abies firma) forests based on e13C records of annual growth rings

Article Abstract:

Researchers studied the annual growth rings from fir trees in Mt. Oyama, Tanzawa Mountains, Japan. Evidences of damages were observed. The same study was conducted on cedar trees at the same site but no damages were observed.

Health aspects, Japan, Brief Article, Natural resources, Fires

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Modeling the formation of secondary organic aerosal (SAO). 2. The predicted effects of relative humidity on aerosal formation the x-pinene-sabinene, 3-carene-, and cyclohexene-ozone systems

Article Abstract:

The atmospheric oxidation of volatile organic compounds is said to have the potential to result in secondary organic aerosol (SAO). The gas/particle partitioning of oxidation products is discussed.

Oxidation-reduction reaction, Oxidation-reduction reactions

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