Ecosystems with highly pulsed water supply must be better understood as climate change may increase frequency and severity of intense storms, droughts and floods. Here we collected data over 3 years (2016–2018) in the episodic wetland outflow channel (Aluize), Banhine National Park, in which the system state changed from dry to wet to dry. Field sampling included vegetation records, small‐scale vegetation zoning, the seed bank and water and soil quality. The same main plant species were found in both dry and wet conditions across the riverbed of the outflow channel. We found only very few diaspores of plants in the soil after prolonged drought. In the subsequent flooded state, we examined very dense vegetation on the water surface, which was dominated by the gramineous species Paspalidium obtusifolium. This species formed a compact floating mat that was rooted to the riverbed. The Cyperaceae Bolboschoenus glaucus showed high clonal growth in the form of root tubers, which likely serve as important food reservoir during drought. Soil and water analyses do not indicate a limitation by nutrients. We outline how resident people may change the plant community structure with an increasing practice of setting fire to the meadows in the dried‐up riverbed to facilitate plant regrowth as food for their livestock.

中文翻译：

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莫桑比克Banhine湿地大面积流出时，草可以应对高对比度的生态系统条件

必须更好地理解具有高度脉冲供水的生态系统，因为气候变化可能会增加强风暴，干旱和洪水的频率和严重性。在这里，我们收集了Banhine国家公园3年（2016-2018年）间歇性湿地流出通道（Aluize）中的数据，系统状态从干变湿。田间采样包括植被记录，小规模植被分区，种子库以及水和土壤质量。在流出通道河床的干湿条件下都发现了相同的主要植物物种。长期干旱后，我们在土壤中只发现很少的植物渗水。在随后的水淹状态下，我们检查了水面非常茂密的植被，其中以禾本科种P草（Paspalidium obtusifolium）为主。该物种形成了扎根于河床的致密浮垫。莎草（Cyperaceae Bolboschoenus glaucus）以块根形式表现出高度的克隆生长，这可能在干旱期间成为重要的食物储藏库。土壤和水的分析没有表明养分的限制。我们概述了居民如何通过在干燥的河床上放火烧草地以促进植物再生作为牲畜的食物，从而改变植物群落结构。