香椿的树木年轮宽度与超年生殖行为的相互关系:对树轮学研究的警示

Interrelationship between tree-ring width and supra-annual reproductive behaviour of Cedrela odorata:an alert for dendrochronological research

资源分配到生殖过程涉及到生态和进化因素,可能会减少植物的营养生长。这种相互关系在自然界中不容易观察到,因为有许多参数可以限制生殖结构的产生或生物量的增加。我们将香椿(Cedrela odorata L.,楝科)在里约热内卢州大西洋森林中的树木年轮宽度与超年生殖行为相关联。总体而言,生殖结构的发育发生在湿润的年份,在生长季初期没有出现水分亏缺。然而,在这些年份,树木年轮宽度较小。这些结果可能与树木年轮宽度与当地气候之间缺乏相关性有关。因此,我们强调在径向生长研究中纳入生殖数据的重要性,以扩大对热带森林生长变异性的理解。

Allocating resources for reproduction involves ecological and evolutionary factors and can reduce vegetative growth in plants.This interrelationship is not easily observed in nature,as there are many parameters that can limit the production of reproductive structures or the addition of biomass.We related tree-ring width to supra-annual reproductive behaviour of Cedrela odorata L.(Meliaceae)in the Atlantic Forest of Rio de Janeiro State.In general,the development of reproductive structures occurred in wet years,without water deficit at the beginning of the growth season.However,in these years,tree-ring width was smaller.These results may be associated with the lack of correlation between tree-ring width and local climate.In this way,we highlight the importance of incorporating reproductive data in radial growth studies to expand the understanding of growth variability in tropical forests.