As species' ranges shift in response to human-induced global changes, species interactions are expected to play a large role in shaping the resultant range dynamics and, subsequently, the composition of modified species assemblages. Most research on the impact of species interactions on range dynamics focuses on the effects of trophic interactions and exploitative competition for resources, but an emerging body of work shows that interspecific competition for territories and mates also affects species range shifts. As such, it is paramount to build a strong understanding of how these forms of behavioural interference between species impact landscape-scale patterns. Here, we examine recent (1997–2019) range dynamics of North American passerines to test the hypothesis that behavioural interference impacts the ease with which species move across landscapes. Over this 22 year period, we found that fine-scale spatial overlap between species (syntopy) increased more for species pairs that engage in interspecific territoriality than for those that do not. We found no evidence, however, for an effect of reproductive interference (hybridisation) on syntopy, and no effect of either type of interference on range-wide overlap (sympatry). Examining the net effects of species interactions on continent-scale range shifts may require species occurrence data spanning longer time periods than are currently available for North American passerines, but our results show that interspecific territoriality has had an overall stabilising influence on species coexistence over the past two decades.

中文翻译：

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种间地域性促进了最近北美雀形目鸟类繁殖栖息地重叠的增加

随着物种的分布范围因人类引起的全球变化而发生变化，预计物种相互作用将在塑造由此产生的分布范围动态以及随后改变物种组合的组成方面发挥重要作用。大多数关于物种相互作用对范围动态影响的研究都集中在营养相互作用和资源剥削性竞争的影响上，但新兴的研究表明，种间对领地和配偶的竞争也会影响物种范围的变化。因此，至关重要的是要深入了解物种之间这些形式的行为干扰如何影响景观尺度模式。这里，我们研究了最近（1997 年至 2019 年）北美雀形目鸟类的活动范围，以检验行为干扰影响物种穿越景观的难易程度的假设。在这 22 年的时间里，我们发现物种之间的精细尺度空间重叠（同位素）对于参与种间地域性的物种对比那些不参与种间地域性的物种对增加更多。然而，我们没有发现任何证据表明生殖干扰（杂交）对同位素有影响，也没有发现任何一种干扰对范围重叠（同源）的影响。检查物种相互作用对大陆范围变化的净影响可能需要跨越比目前可用于北美雀形目动物更长时期的物种发生数据，