Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Villeurbanne, France.
Office Français de la Biodiversité, DRAS-Service conservation et gestion des espèces à enjeux, Montfort, Birieux 01330, France.
Biol Lett. 2022 Jul;18(7):20220213. doi: 10.1098/rsbl.2022.0213. Epub 2022 Jul 20.
In seasonal environments, the timing of reproduction often matches with the peak of food resources. One well-known effect of global warming is an earlier phenology of resources, leading to a possible mismatch between the timing of reproduction for consumers and food peak. However, global warming may also change the dynamics of food resources, such as the intensity and frequency of pulsed mast seeding. How quantitative changes in mast seeding influence the timing of reproduction of seed consumers remains unexplored. Here, we assess how yearly variation in mast seeding influences mating time in wild boar (), a widespread seed consumer species. We took advantage of the intensive monitoring of both female reproduction (1636 females) and acorn production over 6 consecutive years across 15 populations of wild boar in the wild. We found that mating time occurs earlier when acorn production increases in most but not all populations. In two out of 15 populations, heavy females mated earlier than light ones. Our findings demonstrate that mast seeding advances the mating time in some populations, which could perhaps impact how boars respond to climate change.
在季节性环境中，繁殖的时间通常与食物资源的高峰期相吻合。全球变暖的一个显著影响是资源物候的提前，这可能导致消费者繁殖的时间与食物高峰期不匹配。然而，全球变暖也可能改变食物资源的动态，例如脉冲结实的强度和频率。结实的数量变化如何影响种子消费者的繁殖时间，这一点仍有待探索。在这里，我们评估了结实的年际变化如何影响野猪（Sus scrofa）的交配时间，野猪是一种广泛的种子消费者物种。我们利用了对野猪 15 个种群的雌性繁殖（1636 只雌性）和橡果产量的连续 6 年的密集监测。我们发现，在大多数但不是所有种群中，橡果产量增加时，交配时间会提前。在 15 个种群中的两个种群中，体重较重的雌性比体重较轻的雌性更早交配。我们的研究结果表明，结实可以使一些种群的交配时间提前，这可能会影响野猪对气候变化的反应。
