Phenological study of mangrove ecosystems through the collection of litterfall using litter traps is crucial to assessing mangrove productivity, management, and restoration under conditions of climate change. We investigated the phenological patterns (both vegetative and reproductive) of Xylocarpus mekongensis Pierre using litterfall in the Sundarbans, Bangladesh, over a period of 2 years. Leaf litterfall released throughout the year showed a distinct seasonal pattern, and no stipules were released in January or February of either year. Vegetative litterfall (1766.7–1943.4 g m⁻² yr⁻¹) contributed 76.52% of total litterfall (2292.5–2557.1 g m⁻² yr⁻¹). Leaf litterfall contributed the largest amount among the types of vegetative litterfall, followed by branch and stipule litterfall. Peak flowering of X. mekongensis was observed in April (1.72 times mean monthly flower production), and peak fruit maturation was observed in August (1.68 times mean monthly production). Analysis of variance showed significant differences among months for all types vegetative (stipule, leaf and branch) and reproductive (flower, immature fruit and mature fruit) litterfall (p < 0.05). However, t tests indicated no significant differences in vegetative (leaf, stipule, and branch) or reproductive (flower, immature fruit, and mature fruit) litterfall (p > 0.05) between the two successive years of the study period. Monthly mean temperature, day length, and maximum wind speed influenced vegetative, flower, and immature fruit fall. Mature fruit fall was influenced by monthly rainfall, monthly mean temperature, and relative humidity.

通过使用凋落物收集器收集凋落物来对红树林生态系统进行物候研究，对于评估气候变化条件下的红树林生产力，管理和恢复至关重要。我们使用孟加拉国桑达班地区的凋落物，调查了两年内湄公木（Xylocarpus mekongensis Pierre ）的物候模式（包括营养性和生殖性）。全年释放的落叶凋落物表现出明显的季节性模式，并且在每一年的一月或二月没有释放任何规定。营养凋落（1766.7-1943.4克^-2年^-1）贡献总凋落（2292.5-2557.1克的76.52％^-2年^-1）。在植物凋落物类型中，落叶凋落物的贡献最大，其次是树枝和托叶凋落物。X的高峰开花。湄公河在四月观察到（平均月产量的1.72倍），在八月观察到果实成熟高峰（月平均产量的1.68倍）。方差分析显示，所有类型的营养（托叶，叶和枝）和生殖（花，未成熟果实和成熟果实）的凋落物在月份之间均存在显着差异（p <0.05）。但是，t检验表明，在研究期的连续两年中，植物（叶，托叶和枝）或生殖（花，未成熟果实和成熟果实）的凋落物（p> 0.05）无显着差异。月平均温度，日长和最大风速影响植物，花朵和未成熟果实的落下。成熟的果实下降受到月降雨量，月平均温度和相对湿度的影响。