The number of wetlands in Europe decreased by more than 60% by the 1990s compared with the beginning of the twentieth century. Man-made wetlands may be an effective way to compensate for the loss and degradation of freshwater ecosystems. This loss impacts the populations of declining duck species, partly due to a lack of suitable breeding opportunities. In this study, we evaluated duck productivity and invertebrate abundance in 13 man-made Finnish wetlands that were created for waterbirds. Our findings revealed that man-made wetlands have higher duck production than average natural boreal lakes. High invertebrate levels were a key factor that positively correlated with duck pair density, brood density, duckling density of the common teal (Anas crecca), and duck density during the post-breeding period. Our results suggest that man-made wetlands are a useful tool for increasing duck productivity. For upholding this status in the long term, appropriate management should involve maintaining sufficient invertebrate levels.

到 1990 年代，欧洲的湿地数量与 20 世纪初相比减少了 60% 以上。人造湿地可能是弥补淡水生态系统丧失和退化的有效途径。这种损失影响了数量下降的鸭种种群，部分原因是缺乏合适的繁殖机会。在这项研究中，我们评估了为水鸟创造的 13 个芬兰人造湿地中的鸭子生产力和无脊椎动物丰度。我们的研究结果表明，人造湿地的鸭子产量高于平均水平的天然北方湖泊。高无脊椎动物水平是与鸭对密度、育雏密度、鸭鸭密度呈正相关的关键因素。)，以及繁殖后期的鸭密度。我们的研究结果表明，人造湿地是提高鸭子生产力的有用工具。为了长期保持这种状态，适当的管理应包括保持足够的无脊椎动物水平。