基于数字标本探究绿绒蒿属植物花期的变化

近年来,随着全球气温的明显升高,气候变化引起的全球变暖受到人们的广泛关注.气候变暖会使植物物候发生改变,花期的变化能够直观地反映出植物对周围环境的适应,尤其是高山植物对气候变化更为敏感,因此探究高山植物的花期更具有代表性.为了解植物在气候变暖背景下花期的变化特征,并制定出合理的植物保护措施,该文以典型的高山植物绿绒蒿属...

Exploring the flowering period change of Meconopsis based on digital specimen

In the recent years, with the significant increase in global temperature, global warming caused by climate change has attracted widespread attention. Climate warming will change plant phenology, and the changes in flowering period can directly reflect the adaptation of plants to the surrounding environment, especially alpine plants are more sensitive to climate change, therefore, exploring the flowering period of alpine plants is more representative. In order to understand the changing characteristics of the flowering period of plants under the background of climate warming, and to develop reasonable plant protection measures. We took the famous alpine plant Meconopsis as an example, based on the data of 3 056 alpine plant specimens of Meconopsis from 1880 to 2017 kept by the Chinese Virtual Herbarium. Among them, the attributive years of flowering specimens were 104 years, and there were 1 539 specimens of statistical significance. Correlation analysis was used to study the relationship between the flowering period and year of Meconopsis plants distributed in China. The results were as follows:(1)Under the background of climate warming, with the increase of years, the flowering period of Meconopsis showed a trend of postponing.(2)There were differences between species, among them, six species of Meconopsis, including M. integrifolia, M. punicea, M. racemosa, M. henrici, M. lancifolia and M. chelidonifolia, showed a trend of delayed flowering period with the increase of years; the flowering period of three Meconopsis species, M. horridula, M. quintuplinervia and M. impedita showed an earlier trend with the increase of years.(3)Among them, the number of days of delayed flowering period was M. punicea, which was delayed by 6 d on average from 1880 to 2017, and the most advanced number of flowering days was M. impedita, with an average of 5 d in advance from 1880 to 2017. In conclusion, the results of this study indicate that the flowering period of Meconopsis trends to be delayed as a whole under the influence of climate warming, and the flowering period of most species is delayed, while the flowering period of a few species trends to be earlier.