Retrospective bioindication of stratospheric ozone and ultraviolet radiation using hydroxycinnamic acid derivatives of herbarium samples of an aquatic liverwort.
作者： Saúl Otero , Encarnación Núñez-Olivera , Javier Martínez-Abaigar , Rafael Tomás , Satu Huttunen
DOI: 10.1016/J.ENVPOL.2009.03.025
关键词: Environmental chemistry 、 Chemistry 、 Hydroxycinnamic acid 、 Herbarium 、 Botany 、 Ozone layer 、 Ozone 、 Jungermannia exsertifolia 、 Stratosphere 、 Irradiance 、 Ultraviolet radiation
摘要: We analyzed bulk UV absorbance of methanolic extracts and levels five UV-absorbing compounds (hydroxycinnamic acid derivatives) in 135 herbarium samples the liverwort Jungermannia exsertifolia subsp. cordifolia from northern Europe. Samples had been collected 1850-2006 (96% June-August). Both compound were correlated positively with collection year. p-Coumaroylmalic (C1) was only showing a significant (and negative) correlation stratospheric ozone irradiance period that real data these variables existed. Stratospheric reconstruction (1850-2006) based on C1 showed higher values June than July August, which coincides normal monthly variation ozone. Combining all data, there no long-term temporal trend 1850 to 2006. Reconstructed June-July but again detected 1918-2006 using joint data. This agrees previous reconstructions.
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