Temperature at fine spatial scales is an important driver of nest site selection for many avian species during the breeding season and can influence nest success. Sagebrush (Artemisia spp.) communities have areas with high levels of vegetation heterogeneity and high thermal variation; however, fire removes vegetation that provides protection from predators and extreme environmental conditions. To examine the influence of microclimates on Greater Sage-Grouse (Centrocercus urophasianus) nest site selection and nest success in a fire-affected landscape, we measured black bulb temperature (Tbb) and vegetation attributes (e.g., visual obstruction) at 3 spatial scales (i.e. nest bowl, microsite, and landscape) in unburned and burned areas. Nest bowls exhibited greater buffering of Tbb than both nearby microsites and the broader landscape. Notably, nest bowls were warmer in cold temperatures, and cooler in hot temperatures, than nearby microsites and the broader landscape, regardless of burn stage. Nest survival (NS) was higher for nests in unburned areas compared to nests in burned areas (unburned NS = 0.43, 95% confidence interval [CI]: 0.33–0.54; burned NS = 0.24, 95% CI: 0.10–0.46). The amount of bare ground was negatively associated with NS, but effects diminished as the amount of bare ground reached low levels. Shrub height and visual obstruction were positively associated with NS during the entire study period, whereas minimum Tbb had a weaker effect. Our findings demonstrate that thermoregulatory selection by Greater Sage-Grouse at nest sites had marginal effects on their NS. However, given that increases in vegetation structure (e.g., shrub height) provide thermal refuge and increase NS, vegetation remnants or regeneration in a post-fire landscape could be critical to Greater Sage-Grouse nesting ecology.

中文翻译：

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尽管对巢穴生存的影响微乎其微

精细空间尺度的温度是许多鸟类在繁殖季节选择筑巢地点的重要驱动因素，并且会影响筑巢成功率。Sagebrush (Artemisia spp.) 群落具有高度植被异质性和高热变化的区域；然而，火灾会清除植物，保护它们免受捕食者和极端环境条件的影响。为了检查小气候对受火灾影响的大鼠尾草 (Centrocercus urophasianus) 筑巢地点选择和筑巢成功的影响，我们在 3 个空间尺度上测量了黑球温度 (Tbb) 和植被属性（例如，视觉障碍）（即巢碗、微型场地和景观）在未燃烧和燃烧区域。巢碗比附近的微型站点和更广泛的景观表现出更大的 Tbb 缓冲。尤其，与附近的微型遗址和更广阔的景观相比，无论燃烧阶段如何，巢碗在寒冷的温度下更温暖，在炎热的温度下更凉爽。未燃烧区域的巢穴存活率 (NS) 高于燃烧区域的巢穴（未燃烧的 NS = 0.43, 95% 置信区间 [CI]: 0.33–0.54; 燃烧的 NS = 0.24, 95% CI: 0.10–0.46）。裸地数量与 NS 呈负相关，但随着裸地数量达到低水平，影响减弱。在整个研究期间，灌木高度和视觉障碍与 NS 呈正相关，而最小 Tbb 的影响较弱。我们的研究结果表明，大鼠尾草在巢址的体温调节选择对其 NS 有边际影响。然而，考虑到植被结构的增加（例如，