Despite the availability of ever more data on population trends in Arctic waders, we still have limited insight into the factors influencing reproductive success and its resulting contribution to population trajectories. Here, we present data from Zackenberg in high Arctic Greenland that show no changes in timing of egg laying nor clutch size over more than two decades. With variation among species, we found earlier egg laying in seasons with earlier snowmelt, more invertebrates during the pre-laying period, earlier appearance of invertebrates and higher June temperatures. In addition, we found larger clutch sizes with earlier snowmelt, and lower clutch sizes with later nest initiation dates, together with increasing variability in clutch size during the study years in one species. Nest success was lower in late breeding seasons but seemed to increase with season progress, while nest success was much lower during the lasts 18 years of the study period than during the first part of the period. The reason for this could be both increased Arctic fox activity on the tundra and increased researcher activity at nests, which leaves olfactory clues for the foxes. Numbers of juvenile Dunlins produced seem to be negatively correlated with our index of fox activity on the tundra during nesting and fledging, whereas we found no correlations between fox activity and lemming abundance. The effects of severe events in a number of years are described, including a next to non-breeding year in 2018. Our study adds to our understanding that the Arctic is not a homogeneous biome but may show quite different regional patterns of climate change effects.

尽管可以获得更多关于北极涉禽种群趋势的数据，但我们对影响繁殖成功的因素及其对种群轨迹的贡献仍然知之甚少。在这里，我们展示了来自北极格陵兰岛高地扎肯伯格的数据，这些数据表明，在过去的二十多年里，产卵时间和产卵量都没有变化。随着物种之间的差异，我们发现在融雪较早的季节产卵较早，预产期无脊椎动物较多，无脊椎动物较早出现，6月气温较高。此外，我们发现融雪较早的离合器尺寸较大，而筑巢日期较晚的离合器尺寸较小，并且在研究年份中一个物种的离合器尺寸变异性增加。繁殖季节后期的筑巢成功率较低，但似乎随着季节的推进而增加，而研究期间最后 18 年的筑巢成功率远低于该时期的前半年。造成这种情况的原因可能是北极狐在苔原上的活动增加，以及研究人员在巢穴中的活动增加，这为北极狐留下了嗅觉线索。在筑巢和羽化期间，产生的幼年 Dunlins 的数量似乎与我们在苔原上的狐狸活动指数呈负相关，而我们发现狐狸活动与旅鼠丰度之间没有相关性。描述了若干年严重事件的影响，包括 2018 年的下一个非繁殖年。