Wetland forests are dependent on flooding; however, general relationships between flooding and tree responses have been elusive, partly due to often coarse characterisations of flooding. In a novel approach, we used individual tree-scale water level data to assess the effect of flooding duration on a keystone wetland tree species. We surveyed 140 Eucalyptus camphora (Mountain Swamp Gum) trees across a swamp forest in both 2012 and 2019. We used TUFLOW to model daily water levels for the period from 2009 to 2019 and determined the flooding history for each surveyed tree. We then assessed the effect of flooding duration and tree size on the survival, growth, condition and extent of sexual reproduction of individual trees. Longer flooding durations limited the basal area growth of larger trees and reduced extent of sexual reproduction. Larger trees had greater basal area growth and signs of sexual reproduction overall. There were no clear effects of flooding duration or tree size on survival or condition. We suggest that for flood-tolerant tree species, prolonged (but not chronic) flooding is likely to result in slower-growing smaller trees potentially without impacts on condition or survival, and that slow tree growth and vegetative regeneration are important strategies for persistence in swamps.

中文翻译：

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较长时间的洪水会减少基石湿地树种的生长和有性生殖工作

湿地森林依赖洪水。然而，洪水和树木响应之间的一般关系一直难以捉摸，部分原因是洪水的特征通常很粗糙。在一种新颖的方法中，我们使用了单个树级水位数据来评估洪水持续时间对梯形湿地树种的影响。我们调查了140个桉树樟脑2012年和2019年整个沼泽森林中的（山地沼泽口香糖）树木。我们使用TUFLOW建模了2009年至2019年期间的每日水位，并确定了每棵被调查树木的洪水历史。然后，我们评估了淹水持续时间和树木大小对单个树木有性繁殖的存活，生长，状况和程度的影响。较长的洪水持续时间限制了较大树木的基部生长，并降低了有性生殖的程度。较大的树木有较大的基部生长，总体上有性繁殖的迹象。洪水持续时间或树木大小对生存或状况没有明显影响。我们建议，对于耐洪树种，长时间（而非长期）的洪水可能会导致较小树木的生长速度变慢，而这可能不会影响条件或生存，