We investigated how variation in climate influences the timing and intensity of phenological events in two species of the mangrove genus Xylocarpus. Leaf fall in Xylocarpus granatum was continuous in high rainfall sites but was seasonal at sites with long dry seasons. Xylocarpus moluccensis is deciduous, and leaf shedding occurred over 1–2 months at different times in dry season months. Budding and flowering were tightly coupled in X. granatum and occurred in the wet season. At the highest rainfall site, flower fall in X. moluccensis occurred in the mid-wet season, but occurred 9 months later at other sites with protracted dry seasons. For X. moluccensis, the quantities of leaves, buds, flowers and total litter fall were negatively related to annual rainfall, whereas bud fall was negatively related to air temperature. Variations in the quantity of litter produced by X. granatum were not explained by the environmental variables considered. Mean litter production was significantly greater for X. moluccensis than X. granatum (5.16 v. 3.37Mgh–1 year–1 respectively). Mixed forest litter production was greater in forests containing X. moluccensis than X. granatum (7.86 v. 5.95Mgh–1 year–1 respectively). X. granatum has a more plastic response to environmental drivers of canopy production than X. moluccensis.

中文翻译：

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澳大利亚热带地区沿降雨和温度梯度的红树林属的物候和凋落物生产

我们调查了气候变化如何影响两种红树林属 Xylocarpus 物种的物候事件的时间和强度。Xylocarpus granatum 的落叶在降雨量大的地点是连续的，但在旱季长的地点是季节性的。Xylocarpus moluccensis 是落叶的，在旱季月份的不同时间发生了 1-2 个月的落叶。X. granatum 的萌芽和开花紧密结合，发生在雨季。在降雨量最高的地点，X. moluccensis 的落花发生在中雨季，但在其他旱季延长的地点发生在 9 个月后。对于X. moluccensis，叶、芽、花和凋落物总量与年降雨量呈负相关，而芽落与气温呈负相关。X. granatum 产生的凋落物数量的变化不能用所考虑的环境变量来解释。X. moluccensis 的平均凋落物产量明显高于 X. granatum（分别为 5.16 和 3.37Mgh–1 年–1）。含有 X. moluccensis 的森林的混合森林凋落物产量高于 X. granatum（分别为 7.86 和 5.95Mgh–1 年–1）。X. granatum 比 X. moluccensis 对冠层生产的环境驱动因素有更多的可塑性响应。