Bacon Léo, Hingrat Yves, Jiguet Frédéric, Monnet Anne-Christine, Sarrazin François, Robert Alexandre
Emirates Center for Wildlife Propagation Missour Morocco; Centre d'Ecologie et des Sciences de la COnservation (CESCO UMR 7204) Museum National d'Histoire Naturelle Paris France.
Emirates Center for Wildlife Propagation Missour Morocco; RENECO International Wildlife Consultants LLC Abu Dhabi UAE.
Ecol Evol. 2017 Mar 2;7(7):2214-2222. doi: 10.1002/ece3.2821. eCollection 2017 Apr.
The habitat suitability index, which reflects spatial variability in species occurrence probability, has been shown to exhibit various contrasting relationships with local demographic performances (survival, productivity) in several species. One proposed explanation for these discrepancies is that the link between the habitat suitability index and demography is influenced by density-dependent, temporally variable processes. Based on the survival rates of more than 3,000 nests monitored over 12 years in the North African Houbara Bustard, we investigated whether the habitat suitability index computed over the species breeding range is related to nest survival throughout the breeding season, accounting for variation in meteorological conditions. We found that the relationship between the habitat suitability index and nest survival progressively changes along the breeding season and that this intra-annual variation is consistent between years. Our results support the hypothesis that variation in space use occurs intra-annually and that biotic interactions throughout the breeding season strongly influence the habitat suitability index-demography relationship.
栖息地适宜性指数反映了物种出现概率的空间变异性，在几个物种中，它已被证明与当地种群动态表现（存活率、繁殖力）呈现出各种不同的关系。对于这些差异，一种提出的解释是，栖息地适宜性指数与种群统计学之间的联系受到密度依赖、随时间变化的过程的影响。基于对北非鸨12年里监测的3000多个巢穴的存活率，我们调查了在整个繁殖季节，在该物种繁殖范围内计算出的栖息地适宜性指数是否与巢穴存活率相关，并考虑了气象条件的变化。我们发现，栖息地适宜性指数与巢穴存活率之间的关系在整个繁殖季节中逐渐变化，并且这种年内变化在各年份之间是一致的。我们的结果支持这样的假设，即空间利用的变化在年内发生，并且整个繁殖季节的生物相互作用强烈影响栖息地适宜性指数与种群统计学的关系。
