Gagnon Mireille, Lesmerises Frédéric, St-Laurent Martin-Hugues
Centre for Forest Research, Département de Biologie Chimie et Géographie, Université du Québec à Rimouski Rimouski Québec Canada.
Direction de la Gestion de la faune du Bas-Saint-Laurent Ministère de l'Environnement, de la Lutte Contre les Changements Climatiques Rimouski Québec Canada.
Ecol Evol. 2024 Feb 1;14(2):e10909. doi: 10.1002/ece3.10909. eCollection 2024 Feb.
Animal movements, needed to acquire food resources, avoid predation risk, and find breeding partners, are influenced by annual and circadian cycles. Decisions related to movement reflect a quest to maximize benefits while limiting costs, especially in heterogeneous landscapes. Predation by wolves () has been identified as the major driver of moose () habitat selection patterns, and linear features have been shown to increase wolf efficiency to travel, hunt, and kill prey. However, few studies have described moose behavioral response to roads and logging in Canada in the absence of wolves. We thus characterized temporal changes (i.e., day phases and biological periods) in eastern moose () habitat selection and space use patterns near a road network in a wolf-free area located south of the St. Lawrence River (eastern Canada). We used telemetry data collected on 18 females between 2017 and 2019 to build resource selection functions and mixed linear regressions to explain variations in habitat selection patterns, home-range size, and movement rates. Female moose selected forest stands providing forage when movement was not impeded by snow cover (i.e., spring/green-up, summer/rearing, fall/rut) and stands offering protection against incidental predation during calving. In winter, home-range size decreased with an increasing proportion of stands providing food and shelter against harsh weather, limiting the energetic costs associated with movement. Our results reaffirmed the year-round aversive effect of roads, even in the absence of wolves, but the magnitude of this avoidance differed between day phases, being lower during the "dusk-night-dawn" phase, perhaps due to a lower level of human activity on and near roads. Female moose behavior in our study area was similar to what was observed in landscapes where moose and wolves cohabit, suggesting that the risk associated with humans, perceived as another type of predator, and with incidental predators (coyote , black bear ), equates that of wolf predation in heavily managed landscapes.
动物为获取食物资源、规避被捕食风险以及寻找繁殖伴侣而进行的活动,会受到年度和昼夜节律的影响。与活动相关的决策反映了一种在限制成本的同时最大化收益的追求,尤其是在异质性景观中。狼对驼鹿的捕食已被确定为驼鹿栖息地选择模式的主要驱动因素,并且线性特征已被证明能提高狼的移动、捕猎和捕杀猎物的效率。然而,在加拿大没有狼的情况下,很少有研究描述驼鹿对道路和伐木作业的行为反应。因此,我们对位于圣劳伦斯河以南(加拿大东部)无狼区域的道路网络附近东部驼鹿的栖息地选择和空间利用模式的时间变化(即白天阶段和生物周期)进行了特征描述。我们使用了2017年至2019年期间收集的18只雌性驼鹿的遥测数据,构建资源选择函数和混合线性回归,以解释栖息地选择模式、家域大小和移动速率的变化。雌性驼鹿在积雪不阻碍移动时(即春季/返青期、夏季/育幼期、秋季/发情期)选择提供食物的林分,在产仔期间选择能提供免受偶然捕食保护的林分。在冬季,随着提供食物和抵御恶劣天气庇护所的林分比例增加,家域大小减小,从而限制了与移动相关的能量消耗。我们的结果再次证实了道路全年都具有厌恶效应,即使在没有狼的情况下也是如此,但这种回避的程度在不同白天阶段有所不同,在“黄昏 - 夜晚 - 黎明”阶段较低,这可能是由于道路上及附近的人类活动水平较低。我们研究区域内雌性驼鹿的行为与在驼鹿和狼共存的景观中观察到的行为相似,这表明与被视为另一种捕食者的人类以及偶然捕食者(郊狼、黑熊)相关的风险,等同于在管理密集的景观中狼捕食的风险。