Mismatches between current and potential species distributions are commonplace due to lags in the response of populations to changing environmental conditions. The prevailing mating system may contribute to such lags where it leads to mating failure at the range edge, but how active dispersers might mitigate these lags using social information to inform dispersal strategies warrants greater exploration. We used an individual-based model to explore how different mating systems for species that actively search for habitat can impose a filter on the ability to colonise empty, fragmented landscapes, and explored how using social information during dispersal can mitigate the lags caused by more constrained mating systems. The mate-finding requirements implemented in two-sex models consistently led to slower range expansion compared to those that were not mate limited (i.e., female only models), even when mating was polygynous. A mate-search settlement strategy reduced the proportion of unmated females at the range edge but had little impact on rate of spread. In contrast, a negative density-dependent settlement strategy resulted in much faster spread, which could be explained by a greater number of long-distance dispersal events. Our findings suggest that even low rates of mating failure at the range edge can lead to considerable lags in range expansion, though dispersal strategies that favour colonising more distant, sparsely occupied habitat patches may effectively mitigate these lags.

由于种群对不断变化的环境条件的反应滞后，当前和潜在物种分布之间的不匹配很常见。流行的交配系统可能会导致这种滞后，导致范围边缘的交配失败，但主动分散者如何利用社会信息来告知分散策略来减轻这些滞后值得进一步探索。我们使用基于个体的模型来探索积极寻找栖息地的物种的不同交配系统如何对在空旷、支离破碎的景观中殖民的能力施加过滤，并探讨了在传播过程中使用社会信息如何减轻由于更多限制而造成的滞后。交配系统。与那些不受配偶限制的模型（即，只有雌性的模型）相比，在两性模型中实施的寻找配偶的要求始终导致范围扩张较慢，即使交配是一夫多妻制的。寻找配偶的定居策略减少了分布范围边缘未交配雌性的比例，但对传播速度影响不大。相比之下，负密度依赖的定居策略导致传播速度更快，这可以用更多的长距离扩散事件来解释。我们的研究结果表明，即使在范围边缘的交配失败率很低，也可能导致范围扩张出现相当大的滞后，尽管有利于殖民更远、人烟稀少的栖息地斑块的扩散策略可能会有效地缓解这些滞后。