The Phenological Response Of Woody Plants In The Evergreen Broad-leaved Forest Of Gutianshan To Climate

Plant phenology is usually influenced by climatic factors including temperature and temperature,precipitation and sunshine length.At present,most of the studies on phenology are concentrated in temperate and tropical regions,but few studies on plant phenology in subtropical regions.To explore the overall pattern of tropical woody plant phenology,the main climate factor affecting the region phenology and different functional groups of wood,east China's zhejiang province,2012-2017 in Gutianshan national nature reserve(29 ° 10-29 ° 17 '19.4 "' 41.4 " N,118 ° 11 '-118 ° 03' 49.7 " 12.2 ")within the subtropical broad-leaved forest as the main research often,for continuous observation of 106 kinds of plant phenology,analyzed the community level of plant leaf,flower,massive phenological pattern;The response of plant phenology of different functional groups to climate factors was analyzed.The results show that:(1)the phenological pattern of the subtropical plant community of Gutianshan has obvious seasonality.The phenological pattern of leaf-spreading is concentrated in March,flowering is concentrated in May,and fruiting is concentrated in October.There are differences among the phenological patterns of leaf-spreading,flowering and fruiting of different species.Most species of woody plants in Gutianshan have the highest degree of variation in the first flowering period and the first fruiting period and the leaf spreading period,among which the leaf spreading period has the lowest degree of variation.When analyzing the phenology of different types of functional group tree species,it was found that the leaf spreading pattern of different functional group tree species was basically the same,while the phenology of no-flowering and fruiting was obviously different.(2)the climatic factor influencing the phenological pattern of horizontal leafspreading in the subtropical community of Gutianshan was temperature,and the number of leaf-spreading species per month was negatively correlated with the average monthly temperature in the preceding two months and the preceding three months.The climatic factors influencing the phenological pattern of horizontal flowering in the subtropical community of Gutianshan are temperature,precipitation and precipitation fluctuations.The number of flowering species per month is negatively correlated with the mean monthly temperature in the first three months,the first four months and the first five months,and is positively correlated with monthly precipitation and negatively correlated with monthly precipitation fluctuations.The climate factors that affect the phenological pattern of horizontal fruiting in the subtropical community of Gutianshan are mainly temperature and sunshine duration.The phenological pattern of fruiting is mainly positively correlated with the mean monthly temperature of the first month,the first two months and the first three months,in addition to the sunshine duration of the first two months.(3)the response degree of phenology of tree species in different functional groups to climate factors is different,and the response degree of tree species in different types to climate factors in different time periods is also different.For different deciduous tree species in the evergreen broad-leaved forest of Gutianshan,the monthly species number of leaf exhibition of evergreen tree species was not correlated with the climate factors studied,and the monthly species number of leaf exhibition of deciduous tree species was significantly correlated with temperature.For tree species with different life types,the number of shrub species per month in leaf spreading was not correlated with the climate factors studied,while the number of tree species per month in leaf spreading was significantly correlated with temperature.There was no correlation between the phenology of leaf spread of functional group tree species with different pollination methods and different fruit types and the climate factors studied.The number of flowering species per month of evergreen and deciduous tree species was significantly correlated with temperature,while the number of flowering species of arbor and shrub species was significantly correlated with temperature,precipitation and precipitation fluctuation,and there was no difference between them.There was a significant correlation between flowering phenology and monthly precipitation in different pollination types.There was no difference in the response of flowering phenology to climatic factors among the functional taxa of different fruit types.For different deciduous tree species in the evergreen broad-leaved forest of Gutianshan,the number of seed species per month of the evergreen and deciduous tree species is significantly correlated with temperature,but there is a difference in temperature response in different time periods.For tree species with different life types,the number of arbors and shrubs bearing fruit per month is significantly correlated with temperature and sunshine duration,and the response degree of them to temperature and sunshine duration in different periods is different.For species with different pollination methods,there was a significant correlation between the seed phenological temperature of insect-pollinated tree species and wind-pollinated tree species,and there was no difference between the two.There was no difference in the response of seed phenological climate factors between functional groups of different fruit types.